From 0312c3d424f4f547e118a91a4f265ae431232309 Mon Sep 17 00:00:00 2001
From: Andy Kernel <171799466+starswaitforus@users.noreply.github.com>
Date: Wed, 14 Aug 2024 20:58:14 +0200
Subject: [PATCH] Flammable grenade support + HighExplosive

---
 cli/server.php                                |   9 +-
 composer.json                                 |   1 +
 composer.lock                                 |  49 ++++-
 phpunit.xml                                   |   1 -
 server/src/Core/Flame.php                     |  15 ++
 server/src/Core/Game.php                      |  25 ++-
 server/src/Core/Graph.php                     |  20 ++
 server/src/Core/PathFinder.php                | 195 +++++++++++++++++
 server/src/Core/Player.php                    |  21 ++
 server/src/Core/PlayerCollider.php            |   5 +
 server/src/Core/Point.php                     |   5 +
 server/src/Core/World.php                     | 199 +++++++++++++++++-
 server/src/Enum/SoundType.php                 |   3 +-
 server/src/Equipment/Grenade.php              |   5 +-
 server/src/Equipment/HighExplosive.php        |  19 ++
 server/src/Equipment/Incendiary.php           |  23 +-
 server/src/Equipment/Molotov.php              |  23 +-
 server/src/Event/EventList.php                |   1 +
 server/src/Event/GrillEvent.php               | 149 +++++++++++++
 server/src/Event/ThrowEvent.php               |  35 ++-
 server/src/Interface/Flammable.php            |  18 ++
 server/src/Map/DefaultMap.php                 |  10 +
 server/src/Map/Map.php                        |  12 ++
 server/src/Map/TestMap.php                    |   7 +
 server/src/Net/ClueSocket.php                 |   5 +-
 server/src/Traits/Player/MovementTrait.php    |  42 +---
 test/og/Shooting/HighExplosiveGrenadeTest.php | 184 ++++++++++++++++
 test/og/Shooting/MolotovGrenadeTest.php       | 199 ++++++++++++++++++
 test/og/TestGame.php                          |  11 +
 test/og/Unit/PerformanceTest.php              | 102 ++++++++-
 test/og/World/NavigationMeshTest.php          | 119 +++++++++++
 www/assets/js/Enums.js                        |   3 +
 www/assets/js/EventProcessor.js               |   4 +
 www/assets/js/Game.js                         |  30 ++-
 www/assets/js/SoundRepository.js              |   6 +
 www/assets/js/World.js                        |  17 ++
 www/assets/js/hud/KillFeed.js                 |   8 +-
 www/assets/js/utils.js                        |   8 +
 www/demoPlayer.php                            |  38 +++-
 39 files changed, 1535 insertions(+), 91 deletions(-)
 create mode 100644 server/src/Core/Flame.php
 create mode 100644 server/src/Core/Graph.php
 create mode 100644 server/src/Core/PathFinder.php
 create mode 100644 server/src/Event/GrillEvent.php
 create mode 100644 server/src/Interface/Flammable.php
 create mode 100644 test/og/Shooting/HighExplosiveGrenadeTest.php
 create mode 100644 test/og/Shooting/MolotovGrenadeTest.php
 create mode 100644 test/og/World/NavigationMeshTest.php

diff --git a/cli/server.php b/cli/server.php
index 1933858..7741ec8 100644
--- a/cli/server.php
+++ b/cli/server.php
@@ -16,14 +16,17 @@
 $bindAddress = "udp://0.0.0.0:$port";
 /////
 
+$settings = new ServerSetting($playersMax); // must be first for correctly setting the global tickRate (Util::$TICK_RATE)
+
 $logger = new ConsoleLogger();
-$settings = new ServerSetting($playersMax);
-$logger->info("Starting server on '{$bindAddress}', waiting maximum of '{$settings->warmupWaitSec}' sec for '{$playersMax}' player" . ($playersMax > 1 ? 's' : '') . " to connect.");
-$net = new ClueSocket($bindAddress);
+$logger->info("Preparing game for launch.");
 
 $game = ($debug ? GameFactory::createDebug() : GameFactory::createDefaultCompetitive());
 $game->loadMap(new Maps\DefaultMap());
+$game->getWorld()->regenerateNavigationMeshes();
 
+$logger->info("Starting server on '{$bindAddress}', waiting maximum of '{$settings->warmupWaitSec}' sec for '{$playersMax}' player" . ($playersMax > 1 ? 's' : '') . " to connect.");
+$net = new ClueSocket($bindAddress);
 $server = new Server($game, $settings, $net);
 $server->setLogger($logger);
 if ($debug) {
diff --git a/composer.json b/composer.json
index 114a577..157f3e4 100644
--- a/composer.json
+++ b/composer.json
@@ -21,6 +21,7 @@
         "php": ">=8.1",
         "ext-sockets": "*",
 
+        "actived/graphphp": "0.2.2",
         "clue/socket-raw": "1.6.0",
         "textalk/websocket": "1.5.8",
         "psr/log": "3.0.0"
diff --git a/composer.lock b/composer.lock
index 6f40dbe..cc660ef 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,8 +4,55 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "1d2bad3250abdd8d557a0c90a02b2598",
+    "content-hash": "755697a61c7c4bb0a8359326d7550df3",
     "packages": [
+        {
+            "name": "actived/graphphp",
+            "version": "0.2.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/ActiveDevOrga/graphPHP.git",
+                "reference": "2a064c45d8864bf00a546e0e24cc9a40f182e4dc"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/ActiveDevOrga/graphPHP/zipball/2a064c45d8864bf00a546e0e24cc9a40f182e4dc",
+                "reference": "2a064c45d8864bf00a546e0e24cc9a40f182e4dc",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=8.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^10.3"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "GraphPHP\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "ActiveDeveloppment",
+                    "homepage": "https://actived.fr/"
+                },
+                {
+                    "name": "Houssem Guemer",
+                    "email": "houssem.guemer@gmail.com"
+                }
+            ],
+            "description": "A PHP graph theory package.",
+            "support": {
+                "issues": "https://github.com/ActiveDevOrga/graphphp/issues",
+                "source": "https://github.com/ActiveDevOrga/graphphp"
+            },
+            "time": "2023-10-01T09:53:53+00:00"
+        },
         {
             "name": "clue/socket-raw",
             "version": "v1.6.0",
diff --git a/phpunit.xml b/phpunit.xml
index b63cce7..8bbc7b5 100644
--- a/phpunit.xml
+++ b/phpunit.xml
@@ -6,7 +6,6 @@
         stderr="true"
         colors="true"
         cacheResult="false"
-        stopOnFailure="true"
         executionOrder="random"
 >
     <testsuites>
diff --git a/server/src/Core/Flame.php b/server/src/Core/Flame.php
new file mode 100644
index 0000000..b1ba839
--- /dev/null
+++ b/server/src/Core/Flame.php
@@ -0,0 +1,15 @@
+<?php
+
+namespace cs\Core;
+
+final class Flame
+{
+
+    public readonly Point $highestPoint;
+
+    public function __construct(public readonly Point $center, public readonly int $radius, public readonly int $height)
+    {
+        $this->highestPoint = $this->center->clone()->addY($this->height);
+    }
+
+}
diff --git a/server/src/Core/Game.php b/server/src/Core/Game.php
index 62c4257..c10806f 100644
--- a/server/src/Core/Game.php
+++ b/server/src/Core/Game.php
@@ -8,9 +8,11 @@
 use cs\Enum\RoundEndReason;
 use cs\Enum\SoundType;
 use cs\Equipment\Bomb;
+use cs\Equipment\Grenade;
 use cs\Event\DropEvent;
 use cs\Event\Event;
 use cs\Event\GameOverEvent;
+use cs\Event\GrillEvent;
 use cs\Event\KillEvent;
 use cs\Event\PauseEndEvent;
 use cs\Event\PauseStartEvent;
@@ -251,6 +253,11 @@ public function addThrowEvent(ThrowEvent $event): void
         $this->addEvent($event);
     }
 
+    public function addGrillEvent(GrillEvent $event): void
+    {
+        $this->addEvent($event);
+    }
+
     public function addDropEvent(DropEvent $event): void
     {
         $this->addEvent($event);
@@ -258,7 +265,21 @@ public function addDropEvent(DropEvent $event): void
 
     public function playerAttackKilledEvent(Player $playerDead, Bullet $bullet, bool $headShot): void
     {
-        $playerCulprit = $this->players[$bullet->getOriginPlayerId()];
+        $this->playerKilledEvent($this->players[$bullet->getOriginPlayerId()], $playerDead, $bullet->getShootItem()->getId(), $headShot);
+    }
+
+    public function playerGrenadeKilledEvent(Player $playerCulprit, Player $playerDead, Grenade $item): void
+    {
+        $moneyAward = $item->getKillAward();
+        if ($playerCulprit->isPlayingOnAttackerSide() === $playerDead->isPlayingOnAttackerSide()) {
+            $moneyAward = -300;
+        }
+        $playerCulprit->getInventory()->earnMoney($moneyAward);
+        $this->playerKilledEvent($playerCulprit, $playerDead, $item->getId(), false);
+    }
+
+    private function playerKilledEvent(Player $playerCulprit, Player $playerDead, int $itemId, bool $headShot): void
+    {
         if ($playerDead->isPlayingOnAttackerSide() === $playerCulprit->isPlayingOnAttackerSide()) { // team kill
             $this->score->getPlayerStat($playerCulprit->getId())->removeKill();
         } else {
@@ -266,7 +287,7 @@ public function playerAttackKilledEvent(Player $playerDead, Bullet $bullet, bool
         }
         $this->score->getPlayerStat($playerDead->getId())->addDeath();
 
-        $this->addEvent(new KillEvent($playerDead, $playerCulprit, $bullet->getShootItem()->getId(), $headShot));
+        $this->addEvent(new KillEvent($playerDead, $playerCulprit, $itemId, $headShot));
         $sound = new SoundEvent($playerDead->getPositionClone(), SoundType::PLAYER_DEAD);
         $this->addSoundEvent($sound->setPlayer($playerDead));
     }
diff --git a/server/src/Core/Graph.php b/server/src/Core/Graph.php
new file mode 100644
index 0000000..52a1790
--- /dev/null
+++ b/server/src/Core/Graph.php
@@ -0,0 +1,20 @@
+<?php
+
+namespace cs\Core;
+
+use GraphPHP\Graph\DiGraph;
+
+final class Graph extends DiGraph
+{
+
+    public function getNodesCount(): int
+    {
+        return count($this->nodes);
+    }
+
+    public function getEdgeCount(): int
+    {
+        return count($this->edges);
+    }
+
+}
diff --git a/server/src/Core/PathFinder.php b/server/src/Core/PathFinder.php
new file mode 100644
index 0000000..1d6e420
--- /dev/null
+++ b/server/src/Core/PathFinder.php
@@ -0,0 +1,195 @@
+<?php
+
+namespace cs\Core;
+
+use GraphPHP\Edge\DirectedEdge;
+use GraphPHP\Node\Node;
+use SplQueue;
+
+final class PathFinder
+{
+    private Graph $graph;
+    /** @var array<string,bool> */
+    private array $visited = [];
+    /** @var array<int,array{int,int,int}> */
+    private readonly array $moves;
+    private readonly int $obstacleOvercomeHeight;
+    private int $iterationCount = 0;
+    public readonly int $tileSizeHalf;
+
+    public function __construct(private readonly World $world, public readonly int $tileSize, public readonly int $colliderHeight)
+    {
+        if ($this->tileSize < 3 || $tileSize % 2 !== 1) {
+            throw new GameException('Tile size should be odd and greater than 1.');
+        }
+
+        $this->tileSizeHalf = (int)ceil(($this->tileSize - 1) / 2);
+        $this->moves = [
+            90 => [+1, +0, +0],
+            0 => [+0, +0, +1],
+            270 => [-1, +0, +0],
+            180 => [+0, +0, -1],
+        ];
+        $this->graph = new Graph();
+        $this->obstacleOvercomeHeight = Setting::playerObstacleOvercomeHeight();
+    }
+
+    protected function canFullyMoveTo(Point $candidate, int $angle, int $targetDistance, int $radius, int $height): bool
+    {
+        if ($angle % 90 !== 0) {
+            GameException::notImplementedYet();
+        }
+
+        $looseFloor = false;
+        for ($distance = 1; $distance <= $targetDistance; $distance++) {
+            $candidate->addPart(...$this->moves[$angle]);
+            if (!$this->canMoveTo($candidate, $angle, $radius)) {
+                return false;
+            }
+
+            if (!$looseFloor && !$this->world->findFloorSquare($candidate, $radius)) {
+                $looseFloor = true;
+            }
+        }
+
+        if (!$looseFloor) {
+            return true;
+        }
+
+        $fallCandidate = $candidate->clone();
+        foreach (range(1, 3 * $height) as $i) {
+            $fallCandidate->addY(-1);
+            if ($this->world->findFloorSquare($fallCandidate, $radius)) {
+                $candidate->setY($fallCandidate->y);
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    private function canMoveTo(Point $start, int $angle, int $radius): bool
+    {
+        $maxWallCeiling = $start->y + $this->obstacleOvercomeHeight;
+        $xWallMaxHeight = 0;
+        if ($angle === 90 || $angle === 270) {
+            $baseX = $start->clone()->addX(($angle === 90) ? $radius : -$radius);
+            $xWallMaxHeight = $this->world->findHighestWall($baseX, $this->colliderHeight, $radius, $maxWallCeiling, true);
+        }
+        $zWallMaxHeight = 0;
+        if ($angle === 0 || $angle === 180) {
+            $baseZ = $start->clone()->addZ(($angle === 0) ? $radius : -$radius);
+            $zWallMaxHeight = $this->world->findHighestWall($baseZ, $this->colliderHeight, $radius, $maxWallCeiling, false);
+        }
+        if ($xWallMaxHeight === 0 && $zWallMaxHeight === 0) { // no walls
+            return true;
+        }
+
+        // Try step over ONE low height wall
+        $highestWallCeiling = null;
+        if ($xWallMaxHeight === 0 && $zWallMaxHeight <= $maxWallCeiling) {
+            $highestWallCeiling = $zWallMaxHeight;
+        } elseif ($zWallMaxHeight === 0 && $xWallMaxHeight <= $maxWallCeiling) {
+            $highestWallCeiling = $xWallMaxHeight;
+        }
+        if ($highestWallCeiling === null) {
+            return false;
+        }
+
+        $floor = $this->world->findFloor($start->clone()->setY($highestWallCeiling), $radius);
+        if ($floor) {
+            $start->setY($floor->getY()); // side effect
+            return true;
+        }
+
+        return false;
+    }
+
+    public function tryFindClosestTile(Point $point): ?Point
+    {
+        $candidate = $point->clone();
+        foreach ($this->moves as $angle => $move) {
+            $candidate->setFrom($point);
+
+            if ($this->canFullyMoveTo($candidate, $angle, $this->tileSize, 0, $this->colliderHeight)) {
+                $this->convertToNavMeshNode($candidate);
+                if ($this->getGraph()->getNodeById($candidate->hash())) {
+                    return $candidate;
+                }
+            }
+        }
+
+        return null;
+    }
+
+    public function convertToNavMeshNode(Point $point): float
+    {
+        if ($point->x < 1 || $point->z < 1) {
+            throw new GameException('World start from 1');
+        }
+
+        $fmodX = fmod($point->x, $this->tileSize);
+        $fmodZ = fmod($point->z, $this->tileSize);
+
+        $x = ((int)floor(($point->x + ($fmodX == 0 ? -1 : +0)) / $this->tileSize) * $this->tileSize) + 1 + $this->tileSizeHalf;
+        $point->setX($x);
+        $z = ((int)floor(($point->z + ($fmodZ == 0 ? -1 : +0)) / $this->tileSize) * $this->tileSize) + 1 + $this->tileSizeHalf;
+        $point->setZ($z);
+
+        return (abs($this->tileSizeHalf - $fmodX) + abs($this->tileSizeHalf - $fmodZ)) / 2;
+    }
+
+    public function buildNavigationMesh(Point $start, int $objectHeight): void
+    {
+        $startPoint = $start->clone();
+        $this->convertToNavMeshNode($startPoint);
+        if (!$this->world->findFloorSquare($startPoint, 1)) {
+            throw new GameException('No floor on start point');
+        }
+
+        /** @var SplQueue<Point> $queue */
+        $queue = new SplQueue();
+        $queue->enqueue($startPoint);
+        $candidate = new Point();
+        while (!$queue->isEmpty()) {
+            $current = $queue->dequeue();
+            $currentKey = $current->hash();
+            if (array_key_exists($currentKey, $this->visited)) {
+                continue;
+            }
+            $this->visited[$currentKey] = true;
+            $currentNodeOrNull = $this->graph->getNodeById($currentKey);
+            $currentNode = $currentNodeOrNull ?? new Node($currentKey, $current);
+
+            $hasNeighbour = false;
+            foreach ($this->moves as $angle => $move) {
+                $candidate->setFrom($current);
+                if (!$this->canFullyMoveTo($candidate, $angle, $this->tileSize, $this->tileSizeHalf, $objectHeight)) {
+                    continue;
+                }
+
+                $hasNeighbour = true;
+                $newNeighbour = $candidate->clone();
+                $newNode = $this->graph->getNodeById($newNeighbour->hash());
+                if ($newNode === null) {
+                    $newNode = new Node($newNeighbour->hash(), $newNeighbour);
+                    $this->graph->addNode($newNode);
+                }
+                $this->graph->addEdge(new DirectedEdge($currentNode, $newNode, 1));
+                $queue->enqueue($newNeighbour);
+            }
+            if ($hasNeighbour && $currentNodeOrNull === null) {
+                $this->graph->addNode($currentNode);
+            }
+            if (++$this->iterationCount === 10_000) {
+                GameException::notImplementedYet('New map or bad test (no boundary box, bad starting point)?');
+            }
+        }
+    }
+
+    public function getGraph(): Graph
+    {
+        return $this->graph;
+    }
+
+}
diff --git a/server/src/Core/Player.php b/server/src/Core/Player.php
index 38b3935..e8e1e76 100644
--- a/server/src/Core/Player.php
+++ b/server/src/Core/Player.php
@@ -271,6 +271,27 @@ public function getHeadFloor(): Floor
         return $this->headFloor;
     }
 
+    public function getCentrePoint(): Point
+    {
+        return $this->getPositionClone()->addY((int) ceil($this->headHeight / 2));
+    }
+
+    /**
+     * @return list<Point>
+     */
+    public function getPlayerGrenadeHitPoints(): array
+    {
+        $output = [];
+        $hitPointsCount = 5;
+        $offset = max(1, (int) floor(($this->headHeight - 8) / ($hitPointsCount - 1)));
+        $candidate = $this->getPositionClone()->addY(4);
+        foreach (range(0, $hitPointsCount - 1) as $i) {
+            $output[] = $candidate->clone()->addY($i * $offset);
+        }
+
+        return $output;
+    }
+
     /**
      * @param array{id: int, color: int, isAttacker: bool} $data
      */
diff --git a/server/src/Core/PlayerCollider.php b/server/src/Core/PlayerCollider.php
index 0883928..e372c7c 100644
--- a/server/src/Core/PlayerCollider.php
+++ b/server/src/Core/PlayerCollider.php
@@ -78,4 +78,9 @@ public function getHitBoxes(): array
         return $this->hitBoxes;
     }
 
+    public function getPlayer(): Player
+    {
+        return $this->player;
+    }
+
 }
diff --git a/server/src/Core/Point.php b/server/src/Core/Point.php
index cec92bc..f9e799a 100644
--- a/server/src/Core/Point.php
+++ b/server/src/Core/Point.php
@@ -111,6 +111,11 @@ public function addFromArray(array $xyz): void
         $this->z += $xyz[2];
     }
 
+    public function hash(): string
+    {
+        return "{$this->x},{$this->y},{$this->z}";
+    }
+
     public function to2D(string $XYaxis): Point2D
     {
         return new Point2D($this->{$XYaxis[0]}, $this->{$XYaxis[1]});
diff --git a/server/src/Core/World.php b/server/src/Core/World.php
index 3335d96..ab8aaae 100644
--- a/server/src/Core/World.php
+++ b/server/src/Core/World.php
@@ -2,12 +2,17 @@
 
 namespace cs\Core;
 
+use cs\Enum\ArmorType;
 use cs\Enum\InventorySlot;
 use cs\Enum\SoundType;
 use cs\Equipment\Bomb;
+use cs\Equipment\Grenade;
+use cs\Equipment\HighExplosive;
 use cs\Event\DropEvent;
+use cs\Event\GrillEvent;
 use cs\Event\SoundEvent;
 use cs\Event\ThrowEvent;
+use cs\Interface\Flammable;
 use cs\Interface\Hittable;
 use cs\Map\Map;
 
@@ -18,6 +23,8 @@ class World
     private const BOMB_RADIUS = 90;
     private const BOMB_DEFUSE_MAX_DISTANCE = 300;
     private const ITEM_PICK_MAX_DISTANCE = 370;
+    public const GRENADE_NAVIGATION_MESH_TILE_SIZE = 31;
+    public const GRENADE_NAVIGATION_MESH_OBJECT_HEIGHT = 80;
 
     private ?Map $map = null;
     /** @var PlayerCollider[] */
@@ -36,6 +43,7 @@ class World
     private int $lastBombActionTick = -1;
     private int $lastBombPlayerId = -1;
     private int $playerPotentialDistanceSquared;
+    private ?PathFinder $grenadeNavMesh = null;
 
     public function __construct(private Game $game)
     {
@@ -69,6 +77,13 @@ public function loadMap(Map $map): void
         }
     }
 
+    public function regenerateNavigationMeshes(): void
+    {
+        $key = sprintf('%d-%d', self::GRENADE_NAVIGATION_MESH_TILE_SIZE, self::GRENADE_NAVIGATION_MESH_OBJECT_HEIGHT);
+        $this->grenadeNavMesh = $this->getMap()->getNavigationMesh($key)
+            ?? $this->buildNavigationMesh(self::GRENADE_NAVIGATION_MESH_TILE_SIZE, self::GRENADE_NAVIGATION_MESH_OBJECT_HEIGHT);
+    }
+
     public function addRamp(Ramp $ramp): void
     {
         foreach ($ramp->getBoxes() as $box) {
@@ -174,6 +189,39 @@ public function findFloor(Point $point, int $radius = 0): ?Floor
         return $targetFloor;
     }
 
+    public function findHighestWall(Point $bottomCenter, int $height, int $radius, int $maxWallCeiling, bool $xWall): int
+    {
+        $base = $xWall ? $bottomCenter->x : $bottomCenter->z;
+        if ($base < 0) {
+            return $maxWallCeiling + 1;
+        }
+        $walls = $xWall ? $this->getXWalls($base) : $this->getZWalls($base);
+        if ($walls === []) {
+            return 0;
+        }
+
+        $width = 2 * $radius;
+        $highestWallCeiling = 0;
+        $candidatePlane = $bottomCenter->to2D($xWall ? 'zy' : 'xy')->addX(-$radius);
+        foreach ($walls as $wall) {
+            $wallCeiling = $wall->getCeiling();
+            if ($wallCeiling <= $bottomCenter->y) {
+                continue;
+            }
+            if (!Collision::planeWithPlane($wall->getPoint2DStart(), $wall->width, $wall->height, $candidatePlane, $width, $height)) {
+                continue;
+            }
+            if ($wallCeiling > $maxWallCeiling) {
+                return $wallCeiling;
+            }
+            if ($wallCeiling > $highestWallCeiling) {
+                $highestWallCeiling = $wallCeiling;
+            }
+        }
+
+        return $highestWallCeiling;
+    }
+
     public function isOnFloor(Floor $floor, Point $position, int $radius): bool
     {
         return (
@@ -303,14 +351,23 @@ public function canBeSeen(Player $observer, Point $targetCenter, int $targetRadi
         if (Util::distanceSquared($start, $targetCenter) > $maximumDistance * $maximumDistance) {
             return false;
         }
-        $angleVertical = $observer->getSight()->getRotationVertical();
-        $angleHorizontal = $observer->getSight()->getRotationHorizontal();
 
-        $prevPos = $start->clone();
-        $candidate = $start->clone();
-        for ($distance = $observer->getBoundingRadius(); $distance <= $maximumDistance; $distance++) {
+        return $this->pointCanSeePoint(
+            $start, $targetCenter, $observer->getSight()->getRotationHorizontal(), $observer->getSight()->getRotationVertical(),
+            $maximumDistance, $checkForOtherPlayersAlso ? $observer->getId() : null, $targetRadius, $observer->getBoundingRadius(),
+        );
+    }
+
+    private function pointCanSeePoint(
+        Point $observer, Point $targetCenter, float $angleHorizontal, float $angleVertical,
+        int   $maximumDistance, int|null $playerIdSkip = -1, int $targetRadius = 1, int $startDistance = 0,
+    ): bool
+    {
+        $prevPos = $observer->clone();
+        $candidate = $observer->clone();
+        for ($distance = $startDistance; $distance <= $maximumDistance; $distance++) {
             [$x, $y, $z] = Util::movementXYZ($angleHorizontal, $angleVertical, $distance);
-            $candidate->set($start->x + $x, $start->y + $y, $start->z + $z);
+            $candidate->set($observer->x + $x, $observer->y + $y, $observer->z + $z);
             if ($candidate->equals($prevPos)) {
                 continue;
             }
@@ -325,7 +382,7 @@ public function canBeSeen(Player $observer, Point $targetCenter, int $targetRadi
             if ($this->isWallAt($candidate)) {
                 return false;
             }
-            if ($checkForOtherPlayersAlso && $this->isCollisionWithOtherPlayers($observer->getId(), $candidate, 0, 0)) {
+            if ($playerIdSkip !== null && $this->isCollisionWithOtherPlayers($playerIdSkip, $candidate, 0, 0)) {
                 return false;
             }
         }
@@ -412,9 +469,110 @@ public function makeSound(SoundEvent $soundEvent): void
 
     public function throw(ThrowEvent $event): void
     {
+        $event->onComplete[] = function (ThrowEvent $event) {
+            if ($event->item instanceof HighExplosive) {
+                $this->processHighExplosiveBlast($event->getPlayer(), $event->getPositionClone(), $event->item);
+            }
+            if ($event->item instanceof Flammable) {
+                $this->processFlammableExplosion($event->getPlayer(), $event->getPositionClone(), $event->item);
+            }
+        };
         $this->game->addThrowEvent($event);
     }
 
+    public function processFlammableExplosion(Player $thrower, Point $epicentre, Flammable $item): void
+    {
+        if ($this->grenadeNavMesh === null) {
+            $this->regenerateNavigationMeshes();
+        }
+        assert($this->grenadeNavMesh !== null);
+
+        $epicentreFloor = $epicentre->clone()->addY(-$item->getBoundingRadius());
+        $floorNavmeshPoint = $epicentreFloor->clone();
+        $this->grenadeNavMesh->convertToNavMeshNode($floorNavmeshPoint);
+
+        if (null === $this->grenadeNavMesh->getGraph()->getNodeById($floorNavmeshPoint->hash())) {
+            $floorNavmeshPoint = $this->grenadeNavMesh->tryFindClosestTile($epicentreFloor);
+            if (null === $floorNavmeshPoint) {
+                return;
+            }
+        }
+
+        $this->game->addGrillEvent(
+            new GrillEvent(
+                $thrower, $item, $this, $this->grenadeNavMesh->tileSizeHalf,
+                $this->grenadeNavMesh->colliderHeight, $this->grenadeNavMesh->getGraph(), $floorNavmeshPoint,
+            )
+        );
+    }
+
+    public function checkFlameDamage(GrillEvent $fire, int $tickId): void
+    {
+        foreach ($this->playersColliders as $playerId => $collider) {
+            $player = $collider->getPlayer();
+            if (!$player->isAlive() || !$fire->canHitPlayer($playerId, $tickId)) {
+                continue;
+            }
+
+            foreach ($fire->flames as $flame) {
+                if (!Collision::pointWithCylinder(
+                    $flame->highestPoint,
+                    $player->getReferenceToPosition(),
+                    $player->getBoundingRadius(),
+                    $player->getHeadHeight())
+                ) {
+                    continue;
+                }
+
+                $fire->playerHit($playerId, $tickId);
+                $damage = $fire->item->calculateDamage($player->getArmorType() !== ArmorType::NONE);
+                if ($fire->initiator->isPlayingOnAttackerSide() !== $player->isPlayingOnAttackerSide()) {
+                    $this->game->getScore()->getPlayerStat($fire->initiator->getId())->addDamage($damage);
+                }
+                $player->lowerHealth($damage);
+                if (!$player->isAlive()) {
+                    $this->playerDiedToFlame($fire->initiator, $player, $fire->item);
+                }
+
+                break;
+            }
+        }
+    }
+
+    private function processHighExplosiveBlast(Player $thrower, Point $epicentre, HighExplosive $item): void
+    {
+        $maxBlastDistance = $item->getMaxBlastRadius();
+        $maxBlastDistanceSquared = $maxBlastDistance * $maxBlastDistance;
+        foreach ($this->playersColliders as $playerId => $playerCollider) {
+            $player = $this->game->getPlayer($playerId);
+            if (!$player->isAlive()) {
+                continue;
+            }
+            if (Util::distanceSquared($epicentre, $player->getCentrePoint()) > $maxBlastDistanceSquared) {
+                continue;
+            }
+
+            $damage = 0;
+            foreach ($player->getPlayerGrenadeHitPoints() as $point) {
+                $distanceSquared = Util::distanceSquared($epicentre, $point);
+                if ($distanceSquared > $maxBlastDistanceSquared) {
+                    continue;
+                }
+                [$angleHorizontal, $angleVertical] = Util::worldAngle($point, $epicentre);
+                if (!$this->pointCanSeePoint($epicentre, $point, $angleHorizontal ?? 0, $angleVertical, $maxBlastDistance, null)) {
+                    continue;
+                }
+
+                $damage += $item->calculateDamage($distanceSquared, $player->getArmorType() !== ArmorType::NONE);
+            }
+
+            $player->lowerHealth($damage);
+            if (!$player->isAlive()) {
+                $this->game->playerGrenadeKilledEvent($thrower, $player, $item);
+            }
+        }
+    }
+
     public function canAttack(Player $player): bool
     {
         if ($this->game->isPaused()) {
@@ -464,6 +622,33 @@ public function playerDiedToFallDamage(Player $playerDead): void
         $this->game->playerFallDamageKilledEvent($playerDead);
     }
 
+    public function playerDiedToFlame(Player $playerCulprit, Player $playerDead, Flammable $item): void
+    {
+        if (false === ($item instanceof Grenade)) {
+            throw new GameException("New flammable non grenade type?");
+        }
+        $this->game->playerGrenadeKilledEvent($playerCulprit, $playerDead, $item);
+    }
+
+    public function buildNavigationMesh(int $tileSize, int $objectHeight): PathFinder
+    {
+        $boundingRadius = Setting::playerBoundingRadius();
+        if ($tileSize > $boundingRadius - 2) {
+            throw new GameException('Tile size should be decently lower than player bounding radius.');
+        }
+
+        $pathFinder = new PathFinder($this, $tileSize, $objectHeight);
+        $startPoints = $this->getMap()->getStartingPointsForNavigationMesh();
+        if ([] === $startPoints) {
+            throw new GameException('No starting point for navigation defined!');
+        }
+        foreach ($startPoints as $point) {
+            $pathFinder->buildNavigationMesh($point, $objectHeight);
+        }
+
+        return $pathFinder;
+    }
+
     public function checkXSideWallCollision(Point $bottomCenter, int $height, int $radius): ?Wall
     {
         $candidatePlane = $bottomCenter->to2D(self::WALL_X)->addX(-$radius);
diff --git a/server/src/Enum/SoundType.php b/server/src/Enum/SoundType.php
index 8699a5e..2002178 100644
--- a/server/src/Enum/SoundType.php
+++ b/server/src/Enum/SoundType.php
@@ -9,7 +9,7 @@ enum SoundType: int
     case PLAYER_STEP = 1;
     case ITEM_ATTACK = 2;
     case ITEM_ATTACK2 = 3;
-    //
+    case FLAME_SPAWN = 4;
     case ITEM_BUY = 5;
     case BULLET_HIT = 6;
     case PLAYER_DEAD = 7;
@@ -27,5 +27,6 @@ enum SoundType: int
     case GRENADE_AIR = 19;
     case ITEM_DROP_AIR = 20;
     case ITEM_DROP_LAND = 21;
+    case FLAME_EXTINGUISH = 22;
 
 }
diff --git a/server/src/Equipment/Grenade.php b/server/src/Equipment/Grenade.php
index d0c18a7..086b8e1 100644
--- a/server/src/Equipment/Grenade.php
+++ b/server/src/Equipment/Grenade.php
@@ -2,6 +2,7 @@
 
 namespace cs\Equipment;
 
+use cs\Core\GameException;
 use cs\Enum\ArmorType;
 use cs\Enum\HitBoxType;
 use cs\Enum\ItemType;
@@ -35,12 +36,12 @@ public function attackSecondary(Attackable $event): ?AttackResult
 
     public function getDamageValue(HitBoxType $hitBox, ArmorType $armor): int
     {
-        return 0;
+        GameException::notImplementedYet('Should not be called');
     }
 
     public function getKillAward(): int
     {
-        return 0;
+        return 300;
     }
 
     public function getBoundingRadius(): int
diff --git a/server/src/Equipment/HighExplosive.php b/server/src/Equipment/HighExplosive.php
index 8aee648..aeabf91 100644
--- a/server/src/Equipment/HighExplosive.php
+++ b/server/src/Equipment/HighExplosive.php
@@ -7,6 +7,10 @@
 class HighExplosive extends Grenade
 {
 
+    protected const DAMAGE = 20;
+    protected const MAX_BLAST_RADIUS = 400;
+    protected const MAX_BLAST_RADIUS_SQUARED = self::MAX_BLAST_RADIUS * self::MAX_BLAST_RADIUS;
+
     protected int $price = 300;
 
     public function getSlot(): InventorySlot
@@ -14,5 +18,20 @@ public function getSlot(): InventorySlot
         return InventorySlot::SLOT_GRENADE_HE;
     }
 
+    public function getMaxBlastRadius(): int
+    {
+        return self::MAX_BLAST_RADIUS;
+    }
+
+    public function calculateDamage(int $distanceSquared, bool $harArmor): int
+    {
+        $distanceSquared = max(1, $distanceSquared);
+        if ($distanceSquared >= self::MAX_BLAST_RADIUS_SQUARED) {
+            return 0;
+        }
+
+        $damage = self::DAMAGE * (1 - ($distanceSquared / self::MAX_BLAST_RADIUS_SQUARED));
+        return (int) ceil($harArmor ? $damage * 0.3 : $damage);
+    }
 
 }
diff --git a/server/src/Equipment/Incendiary.php b/server/src/Equipment/Incendiary.php
index 7e94997..8e21803 100644
--- a/server/src/Equipment/Incendiary.php
+++ b/server/src/Equipment/Incendiary.php
@@ -3,9 +3,11 @@
 namespace cs\Equipment;
 
 use cs\Enum\InventorySlot;
+use cs\Interface\Flammable;
 
-class Incendiary extends Grenade
+class Incendiary extends Grenade implements Flammable
 {
+    public const MAX_TIME_MS = 7_000;
 
     protected int $price = 600;
 
@@ -14,5 +16,24 @@ public function getSlot(): InventorySlot
         return InventorySlot::SLOT_GRENADE_MOLOTOV;
     }
 
+    public function getMaxTimeMs(): int
+    {
+        return self::MAX_TIME_MS;
+    }
+
+    public function getSpawnAreaMetersSquared(): int
+    {
+        return 90;
+    }
+
+    public function getMaxAreaMetersSquared(): int
+    {
+        return 200_000;
+    }
+
+    public function calculateDamage(bool $hasKevlar): int
+    {
+        return $hasKevlar ? 7 : 3;
+    }
 
 }
diff --git a/server/src/Equipment/Molotov.php b/server/src/Equipment/Molotov.php
index bcebb6b..1b95fe6 100644
--- a/server/src/Equipment/Molotov.php
+++ b/server/src/Equipment/Molotov.php
@@ -3,9 +3,11 @@
 namespace cs\Equipment;
 
 use cs\Enum\InventorySlot;
+use cs\Interface\Flammable;
 
-class Molotov extends Grenade
+class Molotov extends Grenade implements Flammable
 {
+    public const MAX_TIME_MS = 7_000;
 
     protected int $price = 400;
 
@@ -14,5 +16,24 @@ public function getSlot(): InventorySlot
         return InventorySlot::SLOT_GRENADE_MOLOTOV;
     }
 
+    public function getMaxTimeMs(): int
+    {
+        return self::MAX_TIME_MS;
+    }
+
+    public function getSpawnAreaMetersSquared(): int
+    {
+        return 100;
+    }
+
+    public function getMaxAreaMetersSquared(): int
+    {
+        return 200_000;
+    }
+
+    public function calculateDamage(bool $hasKevlar): int
+    {
+        return $hasKevlar ? 8 : 4;
+    }
 
 }
diff --git a/server/src/Event/EventList.php b/server/src/Event/EventList.php
index 54e4903..1a2e3a1 100644
--- a/server/src/Event/EventList.php
+++ b/server/src/Event/EventList.php
@@ -19,6 +19,7 @@ final class EventList
         PlantEvent::class            => 10,
         ThrowEvent::class            => 11,
         DropEvent::class             => 12,
+        GrillEvent::class            => 13,
     ];
 
 }
diff --git a/server/src/Event/GrillEvent.php b/server/src/Event/GrillEvent.php
new file mode 100644
index 0000000..e0baea5
--- /dev/null
+++ b/server/src/Event/GrillEvent.php
@@ -0,0 +1,149 @@
+<?php
+
+namespace cs\Event;
+
+use cs\Core\Flame;
+use cs\Core\GameException;
+use cs\Core\Graph;
+use cs\Core\Player;
+use cs\Core\Point;
+use cs\Core\Util;
+use cs\Core\World;
+use cs\Enum\SoundType;
+use cs\Interface\Flammable;
+use cs\Interface\ForOneRoundMax;
+use GraphPHP\Node\Node;
+use SplQueue;
+
+final class GrillEvent extends Event implements ForOneRoundMax
+{
+    private string $id;
+    /** @var list<Flame> */
+    public array $flames = [];
+    private int $startedTickId;
+    private int $lastFlameSpawnTickId;
+    private int $spawnTickCount;
+    private int $spawnFlameCount;
+    private int $maxTicksCount;
+    /** @var array<int,int> [playerId => tick] */
+    private array $playerTickHits = [];
+    private readonly int $damageCoolDownTickCount;
+    private readonly int $maxFlameCount;
+
+    /** @var SplQueue<Node> $queue */
+    private SplQueue $queue;
+    /** @var array<string,bool> */
+    private array $visited = [];
+
+    public function __construct(
+        public readonly Player    $initiator,
+        public readonly Flammable $item,
+        private readonly World    $world,
+        private readonly int      $flameRadius,
+        private readonly int      $flameHeight,
+        private readonly Graph    $graph,
+        Point                     $start,
+    )
+    {
+        $flameArea = ($this->flameRadius * 2 + 1) ** 2;
+        $this->spawnTickCount = Util::millisecondsToFrames(20);
+        $this->spawnFlameCount = (int)ceil($this->item->getSpawnAreaMetersSquared() / $flameArea);
+        $this->maxTicksCount = Util::millisecondsToFrames($this->item->getMaxTimeMs());
+        $this->damageCoolDownTickCount = Util::millisecondsToFrames(100);
+        $this->maxFlameCount = (int)ceil($this->item->getMaxAreaMetersSquared() / $flameArea);
+        $this->startedTickId = $this->world->getTickId();
+
+        $startNode = $this->graph->getNodeById($start->hash());
+        if (null === $startNode) {
+            throw new GameException("No node for start point: " . $start->hash());
+        }
+
+        $this->id = "grill-{$this->initiator->getId()}-{$this->world->getTickId()}";
+        $this->queue = new SplQueue();
+        $this->queue->enqueue($startNode);
+        $this->igniteFlames();
+    }
+
+    private function extinguish(): void
+    {
+        for ($i = 1; $i <= $this->spawnFlameCount; $i++) {
+            $flame = array_pop($this->flames);
+            if ($flame === null) {
+                return;
+            }
+
+            $sound = new SoundEvent($flame->center, SoundType::FLAME_EXTINGUISH);
+            $sound->addExtra('fire', $this->id);
+            $this->world->makeSound($sound);
+        }
+    }
+
+    public function process(int $tick): void
+    {
+        if ([] === $this->flames) {
+            $this->runOnCompleteHooks();
+            return;
+        }
+        if ($tick >= $this->startedTickId + $this->maxTicksCount) {
+            $this->extinguish();
+            $this->world->checkFlameDamage($this, $tick);
+            return;
+        }
+
+        if ($tick >= $this->lastFlameSpawnTickId + $this->spawnTickCount) {
+            $this->igniteFlames();
+        }
+
+        $this->world->checkFlameDamage($this, $tick);
+    }
+
+    private function igniteFlames(): void
+    {
+        foreach ($this->loadFlames() as $candidate) {
+            $flame = new Flame($candidate, $this->flameRadius, $this->flameHeight);
+            $this->flames[] = $flame;
+            $this->lastFlameSpawnTickId = $this->world->getTickId();
+            $sound = new SoundEvent($flame->center, SoundType::FLAME_SPAWN);
+            $sound->addExtra('fire', $this->id);
+            $sound->addExtra('height', $flame->height);
+            $sound->addExtra('size', $this->flameRadius * 2 + 1);
+            $this->world->makeSound($sound);
+        }
+    }
+
+    /** @return list<Point> */
+    private function loadFlames(): array
+    {
+        $loadCount = $this->maxFlameCount - count($this->flames);
+
+        $output = [];
+        while (!$this->queue->isEmpty() && count($output) < min($this->spawnFlameCount, $loadCount)) {
+            $current = $this->queue->dequeue();
+            if (array_key_exists($current->getId(), $this->visited)) {
+                continue;
+            }
+
+            $this->visited[$current->getId()] = true;
+            /** @var Point $point */
+            $point = $current->getData();
+            $output[] = $point;
+
+            foreach ($this->graph->getNeighbors($current) as $node) {
+                $this->queue->enqueue($node);
+            }
+        }
+
+        return $output;
+    }
+
+    public function canHitPlayer(int $playerId, int $tickId): bool
+    {
+        return (($this->playerTickHits[$playerId] ?? 0) + $this->damageCoolDownTickCount <= $tickId);
+    }
+
+    public function playerHit(int $playerId, int $tickId): void
+    {
+        $this->playerTickHits[$playerId] = $tickId;
+    }
+
+}
diff --git a/server/src/Event/ThrowEvent.php b/server/src/Event/ThrowEvent.php
index ba7c754..57d1604 100644
--- a/server/src/Event/ThrowEvent.php
+++ b/server/src/Event/ThrowEvent.php
@@ -15,8 +15,10 @@
 use cs\Equipment\HighExplosive;
 use cs\HitGeometry\BallCollider;
 use cs\Interface\Attackable;
+use cs\Interface\ForOneRoundMax;
+use cs\Interface\Flammable;
 
-final class ThrowEvent extends Event implements Attackable
+final class ThrowEvent extends Event implements Attackable, ForOneRoundMax
 {
 
     private string $id;
@@ -31,14 +33,14 @@ final class ThrowEvent extends Event implements Attackable
     private int $tickMax;
 
     public function __construct(
-        private readonly Player  $player,
-        private readonly World   $world,
-        Point                    $origin,
-        private readonly Grenade $item,
-        private float            $angleHorizontal,
-        private float            $angleVertical,
-        public readonly int      $radius,
-        private float            $velocity,
+        private readonly Player $player,
+        private readonly World  $world,
+        Point                   $origin,
+        public readonly Grenade $item,
+        private float           $angleHorizontal,
+        private float           $angleVertical,
+        public readonly int     $radius,
+        private float           $velocity,
     )
     {
         if ($this->velocity <= 0) {
@@ -141,6 +143,11 @@ public function process(int $tick): void
                 continue;
             }
 
+            if ($this->angleVertical < 10 && $this->item instanceof Flammable && $this->ball->getResolutionAngleVertical() > 0) {
+                $this->finishLanding($pos);
+                return;
+            }
+
             $this->setAngles($this->ball->getResolutionAngleHorizontal(), $this->ball->getResolutionAngleVertical());
             $this->bounceCount++;
             $this->velocity = $this->velocity / ($this->bounceCount > 4 ? $this->bounceCount : 1.5);
@@ -201,4 +208,14 @@ public function serialize(): array
         ];
     }
 
+    public function getPositionClone(): Point
+    {
+        return $this->position->clone();
+    }
+
+    public function getPlayer(): Player
+    {
+        return $this->player;
+    }
+
 }
diff --git a/server/src/Interface/Flammable.php b/server/src/Interface/Flammable.php
new file mode 100644
index 0000000..fb68544
--- /dev/null
+++ b/server/src/Interface/Flammable.php
@@ -0,0 +1,18 @@
+<?php
+
+namespace cs\Interface;
+
+interface Flammable
+{
+
+    public function getMaxAreaMetersSquared(): int;
+
+    public function getSpawnAreaMetersSquared(): int;
+
+    public function getMaxTimeMs(): int;
+
+    public function getBoundingRadius(): int;
+
+    public function calculateDamage(bool $hasKevlar): int;
+
+}
diff --git a/server/src/Map/DefaultMap.php b/server/src/Map/DefaultMap.php
index 315408b..141c355 100644
--- a/server/src/Map/DefaultMap.php
+++ b/server/src/Map/DefaultMap.php
@@ -12,6 +12,8 @@ class DefaultMap extends BoxMap
 
     /** @var Box[] */
     private array $buyArea;
+    /** @var Point[] */
+    private array $navmeshPoints = [];
     private Box $plantArea;
 
     public function __construct()
@@ -32,10 +34,12 @@ public function __construct()
             $attackers[] = new Point($x * $scale + $scaleHalf, $y, 4 * $scale - $radiusHalf);
             $this->addBox(new Box(new Point(($x - 1) * $scale, $y, 5 * $scale), 3 * $scale, $boxHeight, $scale));
             $this->addBox(new Box(new Point(($x) * $scale, $y + $boxHeight, 5 * $scale), 1 * $scale, $boxHeight, $scale));
+            $this->navmeshPoints[] = new Point(($x) * $scale + $scaleHalf, 2 * $boxHeight + $y, 5 * $scale + $scaleHalf);
 
             $defenders[] = new Point($x * $scale + $scaleHalf, $y, 28 * $scale + $radiusHalf);
             $this->addBox(new Box(new Point(($x - 1) * $scale, $y, 26 * $scale), 3 * $scale, $boxHeight, $scale));
             $this->addBox(new Box(new Point(($x) * $scale, $y + $boxHeight, 26 * $scale), 1 * $scale, $boxHeight, $scale));
+            $this->navmeshPoints[] = new Point(($x) * $scale + $scaleHalf, 2 * $boxHeight + $y, 26 * $scale + $scaleHalf);
         }
 
         $stepHeight = 10;
@@ -46,6 +50,7 @@ public function __construct()
                 $this->addBox($box);
             }
             $this->addBox(new Box(new Point(21 * $scale, $y, $z * $scale), $scale, $heightCrouch, $scale));
+            $this->navmeshPoints[] = new Point(21 * $scale + $scaleHalf, $y + $heightCrouch, $z * $scale + $scaleHalf);
             $ramp2 = new Ramp(new Point(24 * $scale - 20, $y, $z * $scale), new Point2D(-1, 0), $stepCount, $scale, true, 12, $stepHeight);
             foreach ($ramp2->getBoxes() as $box) {
                 $this->addBox($box);
@@ -60,6 +65,11 @@ public function __construct()
         $this->buyArea[1] = new Box(new Point(0, $y, 0), 43 * $scale, 2 * $heightStand, 6 * $scale);
     }
 
+    public function getStartingPointsForNavigationMesh(): array
+    {
+        return array_merge(parent::getStartingPointsForNavigationMesh(), $this->navmeshPoints);
+    }
+
     public function getSpawnRotationDefender(): int
     {
         return 180;
diff --git a/server/src/Map/Map.php b/server/src/Map/Map.php
index 15b1223..ed5c352 100644
--- a/server/src/Map/Map.php
+++ b/server/src/Map/Map.php
@@ -4,6 +4,7 @@
 
 use cs\Core\Box;
 use cs\Core\Floor;
+use cs\Core\PathFinder;
 use cs\Core\Point;
 use cs\Core\Wall;
 
@@ -31,6 +32,12 @@ public function setDefendersSpawnPositions(array $positions): void
         $this->spawnPositionDefender = $positions;
     }
 
+    /** @return Point[] */
+    public function getStartingPointsForNavigationMesh(): array
+    {
+        return array_merge($this->getSpawnPositionAttacker(), $this->getSpawnPositionDefender());
+    }
+
     /**
      * @return Wall[]
      */
@@ -83,6 +90,11 @@ public function getBombMaxBlastDistance(): int
         return 1000;
     }
 
+    public function getNavigationMesh(string $key): ?PathFinder
+    {
+        return null;
+    }
+
     public abstract function getBuyArea(bool $forAttackers): Box;
 
     public abstract function getPlantArea(): Box;
diff --git a/server/src/Map/TestMap.php b/server/src/Map/TestMap.php
index 4575fcb..ff02905 100644
--- a/server/src/Map/TestMap.php
+++ b/server/src/Map/TestMap.php
@@ -9,6 +9,7 @@ class TestMap extends Map
 {
 
     private Box $buyArea;
+    public Point $startPointForNavigationMesh;
 
     public function __construct()
     {
@@ -22,6 +23,12 @@ public function __construct()
         ]);
 
         $this->buyArea = new Box(new Point(), 99999, 999, 99999);
+        $this->startPointForNavigationMesh = new Point(100, 0, 100);
+    }
+
+    public function getStartingPointsForNavigationMesh(): array
+    {
+        return [$this->startPointForNavigationMesh];
     }
 
     public function getBuyArea(bool $forAttackers): Box
diff --git a/server/src/Net/ClueSocket.php b/server/src/Net/ClueSocket.php
index 1a036a6..9e0ced3 100644
--- a/server/src/Net/ClueSocket.php
+++ b/server/src/Net/ClueSocket.php
@@ -2,6 +2,7 @@
 
 namespace cs\Net;
 
+use Socket as PHPSocketResource;
 use Socket\Raw\Exception;
 use Socket\Raw\Factory;
 use Socket\Raw\Socket;
@@ -13,14 +14,14 @@ class ClueSocket implements NetConnector
 {
 
     private Socket $socket;
-    private readonly \Socket $resource;
+    private readonly PHPSocketResource $resource;
 
     public function __construct(string $bindAddress)
     {
         try {
             $this->socket = (new Factory())->createServer($bindAddress);
+            $this->socket->setBlocking(false);
             $this->resource = $this->socket->getResource(); // @phpstan-ignore-line
-            socket_set_nonblock($this->resource); // @phpstan-ignore-line
         } catch (Exception $ex) {
             throw new NetException($ex->getMessage(), $ex->getCode(), $ex);
         }
diff --git a/server/src/Traits/Player/MovementTrait.php b/server/src/Traits/Player/MovementTrait.php
index df6a847..2f156c7 100644
--- a/server/src/Traits/Player/MovementTrait.php
+++ b/server/src/Traits/Player/MovementTrait.php
@@ -2,7 +2,6 @@
 
 namespace cs\Traits\Player;
 
-use cs\Core\Collision;
 use cs\Core\GameException;
 use cs\Core\Point;
 use cs\Core\Setting;
@@ -261,13 +260,13 @@ private function canMoveTo(Point $start, Point $candidate, int $angle): ?bool
         if ($xMove) {
             $xGrowing = ($start->x < $candidate->x);
             $baseX = $candidate->clone()->addX($xGrowing ? $radius : -$radius);
-            $xWallMaxHeight = $this->findHighestWall($baseX, $height, $radius, $maxWallCeiling, true);
+            $xWallMaxHeight = $this->world->findHighestWall($baseX, $height, $radius, $maxWallCeiling, true);
         }
         $zWallMaxHeight = 0;
         if ($zMove) {
             $zGrowing = ($start->z < $candidate->z);
             $baseZ = $candidate->clone()->addZ($zGrowing ? $radius : -$radius);
-            $zWallMaxHeight = $this->findHighestWall($baseZ, $height, $radius, $maxWallCeiling, false);
+            $zWallMaxHeight = $this->world->findHighestWall($baseZ, $height, $radius, $maxWallCeiling, false);
         }
         if ($xWallMaxHeight === 0 && $zWallMaxHeight === 0) { // no walls
             return true;
@@ -313,11 +312,11 @@ private function canMoveTo(Point $start, Point $candidate, int $angle): ?bool
         // Try to move in X axis
         $oneSideCandidate = $start->clone()->addX($angle > 180 ? -1 : 1);
         $oneSideCandidateX = $oneSideCandidate->clone()->addX($angle > 180 ? -$radius : $radius);
-        $wallCeiling = $this->findHighestWall($oneSideCandidateX, $height, $radius, $maxWallCeiling, true);
+        $wallCeiling = $this->world->findHighestWall($oneSideCandidateX, $height, $radius, $maxWallCeiling, true);
         if ($wallCeiling > $maxWallCeiling) { // X too tall, try to move in Z axis
             $oneSideCandidate = $start->clone()->addZ(($angle > 270 || $angle < 90) ? 1 : -1);
             $oneSideCandidateZ = $oneSideCandidate->clone()->addZ(($angle > 270 || $angle < 90) ? $radius : -$radius);
-            $wallCeiling = $this->findHighestWall($oneSideCandidateZ, $height, $radius, $maxWallCeiling, false);
+            $wallCeiling = $this->world->findHighestWall($oneSideCandidateZ, $height, $radius, $maxWallCeiling, false);
         }
         if ($wallCeiling > $maxWallCeiling) { // tall walls everywhere
             return false;
@@ -338,39 +337,6 @@ private function canMoveTo(Point $start, Point $candidate, int $angle): ?bool
         return null;
     }
 
-    private function findHighestWall(Point $bottomCenter, int $height, int $radius, int $maxWallCeiling, bool $xWall): int
-    {
-        $base = $xWall ? $bottomCenter->x : $bottomCenter->z;
-        if ($base < 0) {
-            return $maxWallCeiling + 1;
-        }
-        $walls = $xWall ? $this->world->getXWalls($base) : $this->world->getZWalls($base);
-        if ($walls === []) {
-            return 0;
-        }
-
-        $width = 2 * $radius;
-        $highestWallCeiling = 0;
-        $candidatePlane = $bottomCenter->to2D($xWall ? 'zy' : 'xy')->addX(-$radius);
-        foreach ($walls as $wall) {
-            $wallCeiling = $wall->getCeiling();
-            if ($wallCeiling <= $bottomCenter->y) {
-                continue;
-            }
-            if (!Collision::planeWithPlane($wall->getPoint2DStart(), $wall->width, $wall->height, $candidatePlane, $width, $height)) {
-                continue;
-            }
-            if ($wallCeiling > $maxWallCeiling) {
-                return $wallCeiling;
-            }
-            if ($wallCeiling > $highestWallCeiling) {
-                $highestWallCeiling = $wallCeiling;
-            }
-        }
-
-        return $highestWallCeiling;
-    }
-
     private function collisionWithPlayer(Point $candidate, int $radius): bool
     {
         return (null !== $this->world->isCollisionWithOtherPlayers($this->id, $candidate, $radius, $this->headHeight));
diff --git a/test/og/Shooting/HighExplosiveGrenadeTest.php b/test/og/Shooting/HighExplosiveGrenadeTest.php
new file mode 100644
index 0000000..548018a
--- /dev/null
+++ b/test/og/Shooting/HighExplosiveGrenadeTest.php
@@ -0,0 +1,184 @@
+<?php
+
+namespace Test\Shooting;
+
+use cs\Core\Player;
+use cs\Core\Point;
+use cs\Core\Setting;
+use cs\Core\Wall;
+use cs\Enum\BuyMenuItem;
+use cs\Enum\Color;
+use cs\Equipment\HighExplosive;
+use cs\Weapon\PistolGlock;
+use Test\BaseTestCase;
+
+class HighExplosiveGrenadeTest extends BaseTestCase
+{
+
+    public function testOwnDamage(): void
+    {
+        $game = $this->createNoPauseGame();
+        $game->getPlayer(1)->setPosition(new Point(500,0, 500));
+        $health = $game->getPlayer(1)->getHealth();
+
+        $this->playPlayer($game, [
+            fn(Player $p) => $p->getInventory()->earnMoney(1000),
+            fn(Player $p) => $p->buyItem(BuyMenuItem::KEVLAR_BODY),
+            fn(Player $p) => $p->getSight()->look(0, -90),
+            fn(Player $p) => $this->assertTrue($p->buyItem(BuyMenuItem::GRENADE_HE)),
+            fn(Player $p) => $this->assertInstanceOf(HighExplosive::class, $p->getEquippedItem()),
+            $this->waitNTicks(HighExplosive::equipReadyTimeMs),
+            fn(Player $p) => $this->assertSame($health, $p->getHealth()),
+            fn(Player $p) => $this->assertNotNull($p->attackSecondary()),
+            $this->waitXTicks(100),
+            fn(Player $p) => $this->assertLessThan($health, $p->getHealth()),
+            $this->endGame(),
+        ]);
+    }
+
+    public function testDamageEnemy(): void
+    {
+        $game = $this->createNoPauseGame();
+        $enemy = new Player(2, Color::ORANGE, false);
+        $game->addPlayer($enemy);
+        $enemy->setPosition(new Point(430, 0, 500));
+        $enemyHealth = $enemy->getHealth();
+
+        $game->getWorld()->addWall(new Wall(new Point(0, 0, 600), true, 800));
+        $game->getWorld()->addWall(new Wall(new Point(560, 0, 0), false, 800));
+
+        $this->playPlayer($game, [
+            fn(Player $p) => $p->getSight()->look(40, -10),
+            fn(Player $p) => $this->assertTrue($p->buyItem(BuyMenuItem::GRENADE_HE)),
+            fn(Player $p) => $this->assertSame(500, $p->getMoney()),
+            fn(Player $p) => $this->assertInstanceOf(HighExplosive::class, $p->getEquippedItem()),
+            $this->waitNTicks(HighExplosive::equipReadyTimeMs),
+            fn(Player $p) => $this->assertSame($enemyHealth, $enemy->getHealth()),
+            fn(Player $p) => $this->assertNotNull($p->attack()),
+            $this->waitXTicks(100),
+            fn(Player $p) => $this->assertLessThan($enemyHealth, $enemy->getHealth()),
+            fn(Player $p) => $this->assertSame(500, $p->getMoney()),
+            $this->endGame(),
+        ]);
+    }
+
+    public function testKillEnemy(): void
+    {
+        $game = $this->createNoPauseGame();
+        $enemy = new Player(2, Color::ORANGE, false);
+        $game->addPlayer($enemy);
+        $enemy->setPosition(new Point(430, 0, 500));
+
+        $game->getWorld()->addWall(new Wall(new Point(0, 0, 600), true, 800));
+        $game->getWorld()->addWall(new Wall(new Point(560, 0, 0), false, 800));
+
+        $this->playPlayer($game, [
+            fn(Player $p) => $p->getSight()->look(40, -2),
+            fn(Player $p) => $p->equipSecondaryWeapon(),
+            $this->waitNTicks(PistolGlock::equipReadyTimeMs),
+            fn(Player $p) => $this->assertPlayerHit($p->attack()),
+            fn(Player $p) => $p->getSight()->look(40, -10),
+            fn(Player $p) => $this->assertTrue($p->buyItem(BuyMenuItem::GRENADE_HE)),
+            fn(Player $p) => $this->assertSame(500, $p->getMoney()),
+            fn(Player $p) => $this->assertInstanceOf(HighExplosive::class, $p->getEquippedItem()),
+            $this->waitNTicks(HighExplosive::equipReadyTimeMs),
+            fn(Player $p) => $this->assertSame(71, $enemy->getHealth()),
+            fn(Player $p) => $this->assertNotNull($p->attack()),
+            $this->waitXTicks(100),
+        ]);
+
+        $this->assertSame(2, $game->getRoundNumber());
+        $this->assertSame(500 + 300, $game->getPlayer(1)->getMoney());
+    }
+
+    public function testWallBlockDamage(): void
+    {
+        $game = $this->createNoPauseGame();
+        $game->getWorld()->addWall(new Wall(new Point(0, 0, 400), true, 800, 1000));
+        $game->getPlayer(1)->setPosition(new Point(100, 0, 500));
+
+        $this->playPlayer($game, [
+            fn(Player $p) => $p->getSight()->look(0, -90),
+            fn(Player $p) => $this->assertTrue($p->buyItem(BuyMenuItem::GRENADE_HE)),
+            $this->waitNTicks(HighExplosive::equipReadyTimeMs),
+            fn(Player $p) => $this->assertNotNull($p->attack()),
+            fn(Player $p) => $p->setPosition(new Point(100, 0, 300)),
+            $this->waitNTicks(800),
+            fn(Player $p) => $this->assertSame(100, $p->getHealth()),
+            $this->endGame(),
+        ]);
+    }
+
+    public function testSmallWallBlockDamagePartially(): void
+    {
+        $noWallHealth = null;
+
+        $game = $this->createNoPauseGame();
+        $game->getPlayer(1)->setPosition(new Point(100, 0, 500));
+
+        $this->playPlayer($game, [
+            fn(Player $p) => $p->getSight()->look(0, -90),
+            fn(Player $p) => $this->assertTrue($p->buyItem(BuyMenuItem::GRENADE_HE)),
+            $this->waitNTicks(HighExplosive::equipReadyTimeMs),
+            fn(Player $p) => $this->assertNotNull($p->attackSecondary()),
+            fn(Player $p) => $p->setPosition(new Point(100, 0, 300)),
+            $this->waitNTicks(2000),
+            function (Player $p) use (&$noWallHealth) {
+                $this->assertLessThan(100, $p->getHealth());
+                $noWallHealth = $p->getHealth();
+            },
+            $this->endGame(),
+        ]);
+
+        ////
+
+        $game = $this->createNoPauseGame();
+        $game->getWorld()->addWall(new Wall(new Point(0, 0, 400), true, 800, Setting::playerHeadHeightCrouch() / 2));
+        $game->getPlayer(1)->setPosition(new Point(100, 0, 500));
+
+        $this->playPlayer($game, [
+            fn(Player $p) => $p->getSight()->look(0, -90),
+            fn(Player $p) => $this->assertTrue($p->buyItem(BuyMenuItem::GRENADE_HE)),
+            $this->waitNTicks(HighExplosive::equipReadyTimeMs),
+            fn(Player $p) => $this->assertNotNull($p->attackSecondary()),
+            fn(Player $p) => $p->setPosition(new Point(100, 0, 300)),
+            $this->waitNTicks(2000),
+            function (Player $p) use (&$noWallHealth) {
+                $this->assertGreaterThan($noWallHealth, $p->getHealth());
+                $this->assertLessThan(100, $p->getHealth());
+            },
+            $this->endGame(),
+        ]);
+    }
+
+    public function testDistanceLowerDamage(): void
+    {
+        $game = $this->createNoPauseGame();
+        $game->addPlayer(new Player(2, Color::ORANGE, false));
+        $game->getPlayer(2)->setPosition(new Point(600, 0, 600));
+        $game->addPlayer(new Player(3, Color::ORANGE, false));
+        $game->getPlayer(3)->setPosition(new Point(700, 0, 700));
+        $game->getPlayer(1)->setPosition(new Point(500, 0, 500));
+
+        $this->playPlayer($game, [
+            fn(Player $p) => $p->getSight()->look(45, -89),
+            fn(Player $p) => $this->assertTrue($p->buyItem(BuyMenuItem::GRENADE_HE)),
+            fn(Player $p) => $this->assertInstanceOf(HighExplosive::class, $p->getEquippedItem()),
+            $this->waitNTicks(HighExplosive::equipReadyTimeMs),
+            fn(Player $p) => $this->assertNotNull($p->attackSecondary()),
+            $this->waitXTicks(100),
+            $this->endGame(),
+        ]);
+
+        $health = $game->getPlayer(1)->getHealth();
+        $this->assertSame(1, $game->getRoundNumber());
+        $this->assertCount(3, $game->getAlivePlayers());
+        $this->assertLessThan(100, $health);
+        $this->assertLessThan(100,  $game->getPlayer(2)->getHealth());
+        $this->assertLessThan(100,  $game->getPlayer(3)->getHealth());
+        $this->assertGreaterThan($health,  $game->getPlayer(2)->getHealth());
+        $health = $game->getPlayer(2)->getHealth();
+        $this->assertGreaterThan($health,  $game->getPlayer(3)->getHealth());
+    }
+
+}
diff --git a/test/og/Shooting/MolotovGrenadeTest.php b/test/og/Shooting/MolotovGrenadeTest.php
new file mode 100644
index 0000000..1af2ead
--- /dev/null
+++ b/test/og/Shooting/MolotovGrenadeTest.php
@@ -0,0 +1,199 @@
+<?php
+
+namespace Test\Shooting;
+
+use cs\Core\Box;
+use cs\Core\Player;
+use cs\Core\Point;
+use cs\Core\Point2D;
+use cs\Core\Ramp;
+use cs\Core\Setting;
+use cs\Enum\BuyMenuItem;
+use cs\Enum\Color;
+use cs\Equipment\Molotov;
+use Test\BaseTestCase;
+
+class MolotovGrenadeTest extends BaseTestCase
+{
+
+    public function testOwnDamage(): void
+    {
+        $game = $this->createNoPauseGame(2);
+        $game->getPlayer(1)->setPosition(new Point(500, 0, 500));
+        $game->getWorld()->addBox(new Box(new Point(), 1000, 3000, 1000));
+        $health = $game->getPlayer(1)->getHealth();
+
+        $this->playPlayer($game, [
+            fn(Player $p) => $p->getInventory()->earnMoney(1000),
+            fn(Player $p) => $p->buyItem(BuyMenuItem::KEVLAR_BODY),
+            fn(Player $p) => $p->getSight()->look(0, -90),
+            fn(Player $p) => $this->assertTrue($p->buyItem(BuyMenuItem::GRENADE_MOLOTOV)),
+            fn(Player $p) => $this->assertInstanceOf(Molotov::class, $p->getEquippedItem()),
+            $this->waitNTicks(Molotov::equipReadyTimeMs),
+            fn(Player $p) => $this->assertSame($health, $p->getHealth()),
+            fn(Player $p) => $this->assertNotNull($p->attackSecondary()),
+            fn(Player $p) => $this->assertSame(1, $game->getRoundNumber()),
+            $this->waitNTicks(Molotov::MAX_TIME_MS),
+            fn(Player $p) => $this->assertSame(2, $game->getRoundNumber(), 'Player should not survive molly'),
+            fn(Player $p) => $this->assertSame(1, $game->getScore()->getPlayerStat($p->getId())->getDeaths()),
+            $this->endGame(),
+        ]);
+    }
+
+    public function testWallBlockFire(): void
+    {
+        $game = $this->createNoPauseGame();
+        $box = new Box(new Point(0, 0, 300), 1000, 300, 10);
+        $game->getWorld()->addBox($box);
+        $game->getWorld()->addBox(new Box(new Point(), 1000, 3000, 1000));
+        $health = $game->getPlayer(1)->getHealth();
+        $game->getPlayer(1)->setPosition(new Point(100, 0, 50));
+        $enemy = new Player(2, Color::BLUE, false);
+        $game->addPlayer($enemy);
+        $enemyHealth = $enemy->getHealth();
+        $enemy->setPosition($box->getBase()->setX(100)->addZ($enemy->getBoundingRadius() + 20));
+
+        $this->playPlayer($game, [
+            fn(Player $p) => $p->getSight()->look(0, -30),
+            fn(Player $p) => $this->assertTrue($p->buyItem(BuyMenuItem::GRENADE_MOLOTOV)),
+            $this->waitNTicks(Molotov::equipReadyTimeMs),
+            fn(Player $p) => $this->assertNotNull($p->attack()),
+            $this->waitNTicks(2000),
+            fn(Player $p) => $p->setPosition(new Point(999, 0, 999)),
+            $this->waitNTicks(Molotov::MAX_TIME_MS),
+            fn(Player $p) => $this->assertLessThan($health, $p->getHealth()),
+            $this->endGame(),
+        ]);
+
+        $this->assertSame($enemyHealth, $enemy->getHealth());
+    }
+
+    public function testMolotovSpreadMaze(): void
+    {
+        $game = $this->createNoPauseGame(10);
+        $game->getWorld()->addBox(new Box(new Point(0, 0, 500), 1000, 300, 10));
+        $box = new Box(new Point(0, 0, 300), 250, 300, 10);
+        $game->getWorld()->addBox($box);
+        $game->getWorld()->addBox(new Box(new Point(0, 0, 100), 1000, 300, 10));
+        $game->getWorld()->addBox(new Box(new Point(350, 0, 0), 100, 300, 700));
+        $game->getWorld()->addBox(new Box(new Point(150, 0, 0), 10, Setting::playerObstacleOvercomeHeight() + 10, 300));
+        $game->getPlayer(1)->setPosition(new Point(50, 0, 190));
+        $enemy = new Player(2, Color::BLUE, false);
+        $game->addPlayer($enemy);
+        $enemy->setPosition($box->getBase()->setX(100)->addZ($enemy->getBoundingRadius() + 20));
+        $game->getTestMap()->startPointForNavigationMesh->setFrom($enemy->getPositionClone());
+
+        $this->playPlayer($game, [
+            fn(Player $p) => $p->getSight()->look(100, -20),
+            fn(Player $p) => $this->assertTrue($p->buyItem(BuyMenuItem::GRENADE_MOLOTOV)),
+            $this->waitNTicks(Molotov::equipReadyTimeMs),
+            fn(Player $p) => $this->assertNotNull($p->attack()),
+            $this->waitNTicks(Molotov::MAX_TIME_MS),
+            $this->endGame(),
+        ]);
+
+        $this->assertSame(2, $game->getRoundNumber());
+        $this->assertTrue($game->getScore()->attackersIsWinning());
+        $this->assertSame(1, $game->getScore()->getScoreAttackers());
+        $this->assertSame(0, $game->getScore()->getScoreDefenders());
+
+        $this->assertSame(1, $game->getScore()->getPlayerStat(1)->getKills());
+        $this->assertSame(100, $game->getScore()->getPlayerStat(1)->getDamage());
+        $this->assertSame(0, $game->getScore()->getPlayerStat($enemy->getId())->getKills());
+        $this->assertSame(0, $game->getScore()->getPlayerStat($enemy->getId())->getDamage());
+
+    }
+
+    public function testStandOnTallWallAvoidFire(): void
+    {
+        $game = $this->createNoPauseGame(10);
+        $game->getWorld()->addBox(new Box(new Point(500, 0, 500), 1, $game->getWorld()::GRENADE_NAVIGATION_MESH_OBJECT_HEIGHT + 1, 1));
+        $game->getWorld()->addBox(new Box(new Point(), 1000, 3000, 1000));
+        $health = $game->getPlayer(1)->getHealth();
+
+        $this->playPlayer($game, [
+            fn(Player $p) => $p->setPosition(new Point(500, 0, 460)),
+            fn(Player $p) => $p->getSight()->look(0, -90),
+            fn(Player $p) => $this->assertTrue($p->buyItem(BuyMenuItem::GRENADE_MOLOTOV)),
+            fn(Player $p) => $this->assertInstanceOf(Molotov::class, $p->getEquippedItem()),
+            $this->waitNTicks(Molotov::equipReadyTimeMs),
+            fn(Player $p) => $this->assertSame($health, $p->getHealth()),
+            fn(Player $p) => $this->assertNotNull($p->attack()),
+            $this->waitNTicks(300),
+            function (Player $p) use (&$health, $game) {
+                $this->assertLessThan($health, $p->getHealth());
+                $p->setPosition(new Point(500, $game->getWorld()::GRENADE_NAVIGATION_MESH_OBJECT_HEIGHT + 10, 500));
+                $health = $p->getHealth();
+            },
+            $this->waitNTicks(Molotov::MAX_TIME_MS),
+            function (Player $p) use (&$health) {
+                $this->assertSame($health, $p->getHealth());
+            },
+            $this->endGame(),
+        ]);
+    }
+
+    public function testTunnelExpand(): void
+    {
+        $game = $this->createNoPauseGame();
+        $game->getWorld()->addBox(new Box(new Point(), 1000, 3000, 1000));
+        $grenadeTileSize = $game->getWorld()::GRENADE_NAVIGATION_MESH_TILE_SIZE;
+        $game->getWorld()->addBox(new Box(new Point(0, 0, 500), $grenadeTileSize, 500, 2));
+        $game->getWorld()->addBox(new Box(new Point(0, 0, 500 - ($grenadeTileSize * 4)), $grenadeTileSize, 500, 2));
+        $game->getWorld()->addBox(new Box(new Point($grenadeTileSize, 0, 500 - ($grenadeTileSize * 1)), 1000 - (3 * $grenadeTileSize), 500, 2));
+        $game->getWorld()->addBox(new Box(new Point($grenadeTileSize, 0, 500 - ($grenadeTileSize * 3)), 1000 - (3 * $grenadeTileSize), 500, 2));
+        $game->getWorld()->addBox(new Box(new Point($grenadeTileSize, 0, 500 - $grenadeTileSize), 2, 500, $grenadeTileSize));
+        $game->getWorld()->addBox(new Box(new Point($grenadeTileSize, 0, 500 - ($grenadeTileSize * 4)), 2, 500, $grenadeTileSize));
+        $game->addPlayer(new Player(2, Color::ORANGE, false));
+        $game->addPlayer(new Player(3, Color::BLUE, false));
+        $game->addPlayer(new Player(4, Color::BLUE, false));
+        $br = $game->getPlayer(1)->getBoundingRadius() + 1;
+        $game->getPlayer(2)->setPosition(new Point(700, 0, 500 - ($grenadeTileSize * 2)));
+        $game->getPlayer(3)->setPosition((new Point(100, 0, 500 - $grenadeTileSize))->addZ($br));
+        $game->getPlayer(4)->setPosition((new Point(100, 0, 500 - ($grenadeTileSize * 3)))->addZ(-$br));
+
+        $this->playPlayer($game, [
+            fn(Player $p) => $p->setPosition(new Point((int)ceil($grenadeTileSize / 2) + 1, 0, 500 - ($grenadeTileSize * 2))),
+            fn(Player $p) => $p->crouch(),
+            fn(Player $p) => $p->getSight()->look(0, -90),
+            fn(Player $p) => $this->assertTrue($p->buyItem(BuyMenuItem::GRENADE_MOLOTOV)),
+            $this->waitNTicks(Molotov::equipReadyTimeMs),
+            fn(Player $p) => $this->assertNotNull($p->attack()),
+            fn(Player $p) => $p->setPosition($p->getPositionClone()->addX(1000 + $p->getBoundingRadius())),
+            fn(Player $p) => $this->assertSame(100, $p->getHealth()),
+            $this->waitNTicks(Molotov::MAX_TIME_MS),
+            $this->endGame(),
+        ]);
+
+        $this->assertLessThan(100, $game->getPlayer(2)->getHealth());
+        $this->assertSame(100 - $game->getPlayer(2)->getHealth(), $game->getScore()->getPlayerStat(1)->getDamage());
+        $this->assertSame(1, $game->getScore()->getPlayerStat(2)->getDeaths());
+        $this->assertSame(0, $game->getScore()->getPlayerStat(3)->getDeaths());
+        $this->assertSame(0, $game->getScore()->getPlayerStat(4)->getDeaths());
+        $this->assertSame(0, $game->getScore()->getPlayerStat(1)->getDeaths());
+    }
+
+    public function testFlameClimbStairs(): void
+    {
+        $game = $this->createNoPauseGame();
+        $game->getWorld()->addBox(new Box(new Point(), 1000, 3000, 1000));
+        $grenadeTileSize = $game->getWorld()::GRENADE_NAVIGATION_MESH_TILE_SIZE;
+        $game->getWorld()->addBox(new Box(new Point($grenadeTileSize * 3, 0, 300), 1000, 3000, 1000));
+        $game->getWorld()->addRamp(new Ramp(new Point(-1, 0, 300), new Point2D(0, 1), 100, $grenadeTileSize * 10));
+
+        $this->playPlayer($game, [
+            fn(Player $p) => $p->setPosition(new Point($grenadeTileSize * 2, 0, 200)),
+            fn(Player $p) => $p->getSight()->look(0, -90),
+            fn(Player $p) => $this->assertTrue($p->buyItem(BuyMenuItem::GRENADE_MOLOTOV)),
+            $this->waitNTicks(Molotov::equipReadyTimeMs),
+            fn(Player $p) => $this->assertNotNull($p->attack()),
+            fn(Player $p) => $p->setPosition($p->getPositionClone()->addPart(0, 400, 300)),
+            fn(Player $p) => $this->assertSame(100, $p->getHealth()),
+            fn(Player $p) => $this->assertSame(100, $p->getHealth()),
+            $this->waitNTicks(Molotov::MAX_TIME_MS),
+        ]);
+
+        $this->assertSame(2, $game->getRoundNumber());
+    }
+
+}
diff --git a/test/og/TestGame.php b/test/og/TestGame.php
index b89d086..f5b7cf1 100644
--- a/test/og/TestGame.php
+++ b/test/og/TestGame.php
@@ -6,6 +6,7 @@
 use cs\Core\Game;
 use cs\Core\GameException;
 use cs\Core\Setting;
+use cs\Map\TestMap;
 use cs\Net\Protocol\TextProtocol;
 
 /**
@@ -99,4 +100,14 @@ public function startDebug(string $path = '/tmp/cs.demo.json'): void
         $this->gameStates = [];
     }
 
+    public function getTestMap(): TestMap
+    {
+        $map = $this->getWorld()->getMap();
+        if ($map instanceof TestMap) {
+            return $map;
+        }
+
+        throw new GameException("No test map is loaded");
+    }
+
 }
diff --git a/test/og/Unit/PerformanceTest.php b/test/og/Unit/PerformanceTest.php
index 829b603..732695e 100644
--- a/test/og/Unit/PerformanceTest.php
+++ b/test/og/Unit/PerformanceTest.php
@@ -11,7 +11,9 @@
 use cs\Core\Wall;
 use cs\Enum\BuyMenuItem;
 use cs\Enum\Color;
+use cs\Equipment\Molotov;
 use cs\Event\AttackResult;
+use cs\Interface\Flammable;
 use cs\Map\BoxMap;
 use cs\Map\Map;
 use cs\Map\TestMap;
@@ -22,15 +24,14 @@
 
 class PerformanceTest extends BaseTest
 {
+    private static float $timeScale;
 
     public static function setUpBeforeClass(): void
     {
         gc_collect_cycles();
         parent::setUpBeforeClass();
-        if (getenv('CI') !== false) {
-            self::markTestSkipped('CI too slow');
-        }
 
+        self::$timeScale = 1;
         $sum = 0;
         $timer = new Timer();
         $timer->start();
@@ -39,7 +40,10 @@ public static function setUpBeforeClass(): void
         }
         $took = $timer->stop();
         if ($took->asMicroseconds() > 7500) {
-            self::markTestSkipped('Performance test skipped');
+            self::$timeScale = 1.08;
+        }
+        if (getenv('CI') !== false) {
+            self::$timeScale = 1.10;
         }
 
         Util::$TICK_RATE = 20;
@@ -120,7 +124,7 @@ public function testPlayersRangeShooting(): void
             $this->assertLessThanOrEqual($range + 50, $result->getBullet()->getDistanceTraveled());
         }
         $this->assertGreaterThanOrEqual($range, PistolGlock::range);
-        $this->assertLessThan(21, $took->asMilliseconds());
+        $this->assertLessThan(21 * self::$timeScale, $took->asMilliseconds());
     }
 
     public function testTwoPlayersRangeShootingEachOther(): void
@@ -157,7 +161,7 @@ public function testTwoPlayersRangeShootingEachOther(): void
             $this->assertLessThan(100, $player->getHealth(), "Player: '{$player->getId()}'");
             $this->assertTrue($player->isAlive());
         }
-        $this->assertLessThan(27, $took->asMilliseconds());
+        $this->assertLessThan(27 * self::$timeScale, $took->asMilliseconds());
     }
 
     public function testPlayersMoving(): void
@@ -195,7 +199,7 @@ public function testPlayersMoving(): void
             $this->assertGreaterThan(50, $player->getPositionClone()->z);
             $this->assertGreaterThan(200, $player->getPositionClone()->z);
         }
-        $this->assertLessThan(17, $took->asMilliseconds());
+        $this->assertLessThan(17 * self::$timeScale, $took->asMilliseconds());
     }
 
     public function test3DMovement(): void
@@ -210,7 +214,7 @@ public function test3DMovement(): void
         }
         $took = $timer->stop();
         $this->assertSame([49726, 66913, 55226], $coordinates);
-        $this->assertLessThan(38, $took->asMilliseconds());
+        $this->assertLessThan(38 * self::$timeScale, $took->asMilliseconds());
     }
 
     public function test2DMovement(): void
@@ -225,7 +229,87 @@ public function test2DMovement(): void
         }
         $took = $timer->stop();
         $this->assertSame([66913, 74314], $coordinates);
-        $this->assertLessThan(23, $took->asMilliseconds());
+        $this->assertLessThan(23 * self::$timeScale, $took->asMilliseconds());
+    }
+
+    public function testMolotov(): void
+    {
+        $game = GameFactory::createDebug();
+        $game->loadMap($this->createMolotovMap());
+
+        $timer = new Timer();
+        $timer->start();
+        $game->getWorld()->regenerateNavigationMeshes();
+        $took = $timer->stop();
+        $this->assertLessThan(120 * self::$timeScale, $took->asMilliseconds());
+
+        $player = new Player(1, Color::GREEN, true);
+        $game->addPlayer($player);
+        $this->assertTrue($player->buyItem(BuyMenuItem::GRENADE_MOLOTOV));
+        $tickId = $game->getTickId();
+        foreach (range(0, Util::millisecondsToFrames(Molotov::equipReadyTimeMs)) as $i) {
+            $game->tick(++$tickId);
+        }
+        $flammableItem = $player->getEquippedItem();
+        $this->assertInstanceOf(Flammable::class, $flammableItem);
+
+        $timer->start();
+        $this->assertNotNull($player->attack());
+        $took = $timer->stop();
+        $this->assertLessThan(0.6 * self::$timeScale, $took->asMilliseconds());
+
+        $epicentre = $player->getPositionClone()->addY($flammableItem->getBoundingRadius());
+        $timer->start();
+        $game->getWorld()->processFlammableExplosion($player, $epicentre, $flammableItem);
+        $took = $timer->stop();
+        $this->assertLessThan(0.6 * self::$timeScale, $took->asMilliseconds());
+
+        $samplesCount = 1;
+        $timer->start();
+        foreach (range(1, $samplesCount) as $i) {
+            $game->tick(++$tickId);
+        }
+        $took = $timer->stop();
+        $this->assertLessThan(100, $player->getHealth());
+        $this->assertLessThan(0.3 * self::$timeScale, $took->asMilliseconds() / $samplesCount);
+
+        $health = $player->getHealth();
+        $samplesCount = 10;
+        $timer->start();
+        foreach (range(1, $samplesCount) as $i) {
+            $game->tick(++$tickId);
+        }
+        $took = $timer->stop();
+        $this->assertLessThan($health, $player->getHealth());
+        $this->assertLessThan(0.4 * self::$timeScale, $took->asMilliseconds() / $samplesCount);
+    }
+
+    private function createMolotovMap(): Map
+    {
+        return new class() extends BoxMap {
+            private Box $boundary;
+
+            public function __construct()
+            {
+                $this->boundary = new Box(new Point(11, 12, 13), 1000, 2000, 1000);
+                $this->addBox($this->boundary);
+            }
+
+            public function getBuyArea(bool $forAttackers): Box
+            {
+                return $this->boundary;
+            }
+
+            public function getPlantArea(): Box
+            {
+                return $this->boundary;
+            }
+
+            public function getSpawnPositionAttacker(): array
+            {
+                return [new Point(500, 12, 500)];
+            }
+        };
     }
 
     private function createMap(int $depth = 2000): Map
diff --git a/test/og/World/NavigationMeshTest.php b/test/og/World/NavigationMeshTest.php
new file mode 100644
index 0000000..c2117d3
--- /dev/null
+++ b/test/og/World/NavigationMeshTest.php
@@ -0,0 +1,119 @@
+<?php
+
+namespace Test\World;
+
+use cs\Core\Box;
+use cs\Core\PathFinder;
+use cs\Core\Point;
+use cs\Core\World;
+use Test\BaseTestCase;
+
+final class NavigationMeshTest extends BaseTestCase
+{
+
+    public function testConvertPointToNavMeshPoint(): void
+    {
+        $data = [
+            3 => [
+                ['2,0,2', new Point(1, 0, 1)],
+                ['2,0,2', new Point(2, 0, 2)],
+                ['2,0,2', new Point(3, 0, 3)],
+                ['5,0,2', new Point(4, 0, 1)],
+                ['5,0,2', new Point(5, 0, 1)],
+                ['5,0,2', new Point(6, 0, 1)],
+                ['8,0,5', new Point(9, 0, 4)],
+            ],
+            31 => [
+                ['16,0,16', new Point(3, 0, 1)],
+                ['47,0,16', new Point(32, 0, 2)],
+                ['47,0,16', new Point(42, 0, 17)],
+                ['47,0,47', new Point(42, 0, 59)],
+                ['47,0,47', new Point(59, 0, 59)],
+                ['47,0,47', new Point(59, 0, 59)],
+                ['326,333,326', new Point(333, 333, 333)],
+                ['450,0,295', new Point(450, 0, 285)],
+                ['450,0,295', new Point(461, 0, 285)],
+            ],
+        ];
+        $world = new World($this->createTestGame());
+        foreach ($data as $tileSize => $tests) {
+            $finder = new PathFinder($world, $tileSize, 10);
+            foreach ($tests as [$expected, $point]) {
+                $msg = "Size {$tileSize} point {$point->hash()}";
+                $finder->convertToNavMeshNode($point);
+                $this->assertSame($expected, $point->hash(), $msg);
+            }
+        }
+    }
+
+    public function testSimple(): void
+    {
+        $game = $this->createTestGame();
+        $game->getWorld()->addBox(new Box(new Point(), 10, 1000, 10));
+        $game->getTestMap()->startPointForNavigationMesh->set(5, 0, 5);
+
+        $path = $game->getWorld()->buildNavigationMesh(3, 100);
+        $this->assertSame(9, $path->getGraph()->getNodesCount());
+        $this->assertSame(24, $path->getGraph()->getEdgeCount());
+
+        $start = new Point(4, 0, 1);
+        $path->convertToNavMeshNode($start);
+        $startNode = $path->getGraph()->getNodeById($start->hash());
+        $this->assertNotNull($startNode);
+        $this->assertCount(3, $path->getGraph()->getNeighbors($startNode));
+    }
+
+    public function testBoundary(): void
+    {
+        $game = $this->createTestGame();
+        $game->getWorld()->addBox(new Box(new Point(), 10, 1000, 10));
+        $boxPoint = new Point(5, 0, 1);
+        $game->getWorld()->addBox(new Box($boxPoint, 10, 1000, 10));
+        $game->getTestMap()->startPointForNavigationMesh->set(1, 0, 9);
+        $path = $game->getWorld()->buildNavigationMesh(3, 100);
+
+        $candidate = $boxPoint->clone()->addX(-1)->setZ(5);
+        $this->assertNull($path->getGraph()->getNodeById($candidate->hash()));
+
+        $closestCandidate = $candidate->clone();
+        $path->convertToNavMeshNode($closestCandidate);
+        $this->assertNull($path->getGraph()->getNodeById($closestCandidate->hash()));
+
+        $validPoint = $path->tryFindClosestTile($candidate);
+        $this->assertNotNull($validPoint);
+        $this->assertLessThan($closestCandidate->x, $validPoint->x);
+        $this->assertNotNull($path->getGraph()->getNodeById($validPoint->hash()));
+        $this->assertSame('2,0,5', $validPoint->hash());
+    }
+
+    public function testOneWayDirection(): void
+    {
+        $game = $this->createTestGame();
+        $height = $game->getWorld()::GRENADE_NAVIGATION_MESH_OBJECT_HEIGHT;
+        $doubleHeight = $height * 2;
+        $game->getWorld()->addBox(new Box(new Point(), 10, 1000, 10));
+
+        $game->getWorld()->addBox(new Box(new Point(7, 0, 0), 10, $doubleHeight, 10));
+        $game->getWorld()->addBox(new Box(new Point(7, 0, 0), 10, 1000, 10));
+        $game->getTestMap()->startPointForNavigationMesh->set(8, $doubleHeight, 8);
+
+        $path = $game->getWorld()->buildNavigationMesh(3, $height);
+        $this->assertSame(9, $path->getGraph()->getNodesCount());
+        $this->assertSame(21, $path->getGraph()->getEdgeCount());
+
+        $start = new Point(4, 0, 1);
+        $path->convertToNavMeshNode($start);
+        $startNode = $path->getGraph()->getNodeById($start->hash());
+        $this->assertNotNull($startNode);
+        $this->assertCount(2, $path->getGraph()->getNeighbors($startNode));
+
+        $stepNode = $path->getGraph()->getNodeById((new Point(8, $doubleHeight, 8))->hash());
+        $this->assertNotNull($stepNode);
+        $this->assertSame(['path' => [], 'cost' => INF], $path->getGraph()->shortestPathDijkstra($startNode, $stepNode));
+        $this->assertSame(['path' => ["8,{$doubleHeight},8", '5,0,8', '5,0,5', '5,0,2'], 'cost' => 3.0], $path->getGraph()->shortestPathDijkstra($stepNode, $startNode));
+
+        $skyNode = $path->getGraph()->getNodeById((new Point(8, 1000, 4))->hash());
+        $this->assertNull($skyNode);
+    }
+
+}
diff --git a/www/assets/js/Enums.js b/www/assets/js/Enums.js
index ad1602f..6cc6f75 100644
--- a/www/assets/js/Enums.js
+++ b/www/assets/js/Enums.js
@@ -32,6 +32,7 @@ const EventList = {
     PlantEvent: 10,
     ThrowEvent: 11,
     DropEvent: 12,
+    GrillEvent: 13,
 }
 
 // server/src/Enum/GameOverReason.php
@@ -85,6 +86,7 @@ const SoundType = {
     PLAYER_STEP: 1,
     ITEM_ATTACK: 2,
     ITEM_ATTACK2: 3,
+    FLAME_SPAWN: 4,
     ITEM_BUY: 5,
     BULLET_HIT: 6,
     PLAYER_DEAD: 7,
@@ -102,6 +104,7 @@ const SoundType = {
     GRENADE_AIR: 19,
     ITEM_DROP_AIR: 20,
     ITEM_DROP_LAND: 21,
+    FLAME_EXTINGUISH: 22,
 }
 
 // server/src/Enum/ArmorType.php
diff --git a/www/assets/js/EventProcessor.js b/www/assets/js/EventProcessor.js
index 232408a..ed2631d 100644
--- a/www/assets/js/EventProcessor.js
+++ b/www/assets/js/EventProcessor.js
@@ -108,6 +108,10 @@ export class EventProcessor {
             game.itemDrop(data.item, data.id)
         }
 
+        eventsCallback[EventList.GrillEvent] = function (data) {
+            // todo play grill song
+        }
+
         this.#callbacks = eventsCallback
     }
 }
diff --git a/www/assets/js/Game.js b/www/assets/js/Game.js
index 0a19390..6c04e46 100644
--- a/www/assets/js/Game.js
+++ b/www/assets/js/Game.js
@@ -25,6 +25,7 @@ export class Game {
     #eventProcessor
     #dropItems = {};
     #throwables = {};
+    #flammable = {};
     #roundIntervalIds = [];
     #roundDamage = {did: {},got: {}}
     #playerSlotsVisibleModels = [
@@ -55,6 +56,7 @@ export class Game {
         this.#roundIntervalIds = []
         Object.keys(this.#dropItems).forEach((id) => this.itemPickUp(id))
         Object.keys(this.#throwables).forEach((id) => this.removeGrenade(id))
+        Object.keys(this.#flammable).forEach((fireId) => Object.keys(this.#flammable[fireId]).forEach((flameId) => this.destroyFlame(fireId, flameId)))
         this.#world.reset()
     }
 
@@ -194,6 +196,12 @@ export class Game {
         if (data.type === SoundType.ITEM_PICKUP) {
             this.itemPickUp(data.extra.id)
         }
+        if (data.type === SoundType.FLAME_SPAWN) {
+            this.spawnFlame(data.position, data.extra.size, data.extra.height, data.extra.fire, `${data.position.x}-${data.position.y}-${data.position.z}`)
+        }
+        if (data.type === SoundType.FLAME_EXTINGUISH) {
+            this.destroyFlame(data.extra.fire, `${data.position.x}-${data.position.y}-${data.position.z}`)
+        }
         if (data.type === SoundType.ITEM_DROP_AIR) {
             const item = this.#dropItems[data.extra.id];
             item.rotation.x -= 0.1
@@ -275,9 +283,12 @@ export class Game {
             game.#roundIntervalIds.push(setTimeout(() => this.removeGrenade(throwableId), 18000))
             return;
         }
+        if (item.slot === InventorySlot.SLOT_GRENADE_MOLOTOV || item.slot === InventorySlot.SLOT_GRENADE_HE) {
+            return;
+        }
 
         console.warn("No handler for grenade: ", item)
-        game.#roundIntervalIds.push(setTimeout(() => this.removeGrenade(throwableId), 1000)) // todo responsive volumetric smokes, flashes, fire etc.
+        game.#roundIntervalIds.push(setTimeout(() => this.removeGrenade(throwableId), 1000)) // todo responsive volumetric smokes, etc.
     }
 
     itemDrop(item, id) {
@@ -301,6 +312,23 @@ export class Game {
         delete this.#throwables[id]
     }
 
+    spawnFlame(point, size, height, fireId, flameId) {
+        if (this.#flammable[fireId] === undefined) {
+            this.#flammable[fireId] = {}
+        }
+        height = lerp(height, randomInt(10, 16), Math.min(Math.sqrt(Object.keys(this.#flammable[fireId]).length) / (randomInt(90, 110) / 10), 1))
+        const flame = this.#world.spawnFlame(size, height)
+        this.#flammable[fireId][flameId] = flame
+        flame.position.set(point.x, point.y + (height / 2), -1 * point.z)
+        flame.rotateOnWorldAxis(new THREE.Vector3(0, 1, 0), Math.random() * 6.28)
+    }
+
+    destroyFlame(fireId, flameId) {
+        const flame = this.#flammable[fireId][flameId]
+        this.#world.destroyObject(flame)
+        delete this.#flammable[fireId][flameId]
+    }
+
     bombPlanted(timeMs, position) {
         const world = this.#world
         world.spawnBomb(position)
diff --git a/www/assets/js/SoundRepository.js b/www/assets/js/SoundRepository.js
index aa72f44..dffeb60 100644
--- a/www/assets/js/SoundRepository.js
+++ b/www/assets/js/SoundRepository.js
@@ -133,6 +133,12 @@ export class SoundRepository {
             return null
         }
 
+        if (type === SoundType.FLAME_SPAWN) {
+            return null // todo
+        }
+        if (type === SoundType.FLAME_EXTINGUISH) {
+            return null // todo
+        }
         if (type === SoundType.GRENADE_AIR) {
             return '575509__awildfilli__granada_tiro.wav'
         }
diff --git a/www/assets/js/World.js b/www/assets/js/World.js
index 66c51cc..092aff4 100644
--- a/www/assets/js/World.js
+++ b/www/assets/js/World.js
@@ -9,6 +9,7 @@ export class World {
     #audioLoader
     #modelRepository
     #decals = []
+    #flames = []
     volume = 30
 
     constructor() {
@@ -172,6 +173,20 @@ export class World {
         return dropItem
     }
 
+    spawnFlame(size, height) {
+        let mesh = new THREE.Mesh(
+            new THREE.ConeGeometry(size, height, randomInt(4, 7)),
+            new THREE.MeshStandardMaterial({color: new THREE.Color(`hsl(53, 100%, ${Math.random() * 70 + 20}%, 1)`)}),
+        )
+
+        mesh.castShadow = false
+        mesh.receiveShadow = false
+
+        this.#scene.add(mesh)
+        this.#flames.push(mesh)
+        return mesh
+    }
+
     bulletWallHit(position, surface, radius) {
         const hit = new THREE.Mesh(
             new THREE.CylinderGeometry(radius, radius, .4, 8, 1),
@@ -206,6 +221,8 @@ export class World {
 
     reset() {
         this.clearDecals()
+        this.#flames.forEach((item) => this.destroyObject(item))
+        this.#flames = []
         const bomb = this.#modelRepository.getBomb()
         if (bomb.parent && bomb.parent.name === 'MainScene') {
             bomb.visible = false
diff --git a/www/assets/js/hud/KillFeed.js b/www/assets/js/hud/KillFeed.js
index e6f4171..08c988d 100644
--- a/www/assets/js/hud/KillFeed.js
+++ b/www/assets/js/hud/KillFeed.js
@@ -12,13 +12,11 @@ export class KillFeed {
     showKill(playerCulprit, playerDead, wasHeadshot, playerMe, killedItemId) {
         let killedByBomb = false
         this.#scoreBoard.updatePlayerIsDead(playerDead)
-        if (playerCulprit.id === playerDead.id) { // suicide or bomb
-            if (killedItemId === ItemId.SolidSurface) { // suicide
+        if (playerCulprit.id === playerDead.id) { // suicide
+            if (killedItemId === ItemId.SolidSurface) {
                 this.#scoreBoard.updatePlayerKills(playerDead, -1)
-            } else if (killedItemId === ItemId.Bomb) { // bomb
+            } else if (killedItemId === ItemId.Bomb) {
                 killedByBomb = true
-            } else {
-                throw new Error("New killing item?")
             }
         } else if (playerCulprit.isAttacker === playerDead.isAttacker) { // team kill
             this.#scoreBoard.updatePlayerKills(playerCulprit, -1)
diff --git a/www/assets/js/utils.js b/www/assets/js/utils.js
index e4900fe..de9257b 100644
--- a/www/assets/js/utils.js
+++ b/www/assets/js/utils.js
@@ -37,6 +37,14 @@ function scopeLevelToZoom(scopeLevel) {
     return scopeLevel * 2.2
 }
 
+function randomInt(start, end) {
+    return THREE.MathUtils.randInt(start, end)
+}
+
+function lerp(start, end, percentage) {
+    return THREE.MathUtils.lerp(start, end, percentage)
+}
+
 function msToTick(timeMs) {
     return Math.ceil(timeMs / window._csfGlobal.tickMs)
 }
diff --git a/www/demoPlayer.php b/www/demoPlayer.php
index 1b05755..55c3ef7 100644
--- a/www/demoPlayer.php
+++ b/www/demoPlayer.php
@@ -217,6 +217,15 @@
         },
         showTrajectory: false,
         throwables: [],
+        flammable: [],
+        createBox: function (width, height, depth, color) {
+            let box = new THREE.Mesh(
+                new THREE.BoxGeometry(width, height, depth),
+                new THREE.MeshBasicMaterial({color: color}),
+            )
+            this.scene.add(box)
+            return box
+        },
         createBall: function (radius) {
             const ball = new THREE.Mesh(new THREE.SphereGeometry(radius), new THREE.MeshBasicMaterial({
                 color: 0xAA6611,
@@ -245,14 +254,27 @@
                         self.throwables[event.data.id] = ball
                     }
                 }
-                if (event.code === <?= EventList::map[SoundEvent::class] ?> &&
-                    ([<?= SoundType::GRENADE_LAND->value ?>, <?= SoundType::GRENADE_BOUNCE->value ?>, <?= SoundType::GRENADE_AIR->value ?>].includes(event.data.type))
-                ) {
-                    const ball = self.showTrajectory ? self.createBall(self.throwables[event.data.extra.id]) : self.throwables[event.data.extra.id]
-                    ball.visible = true
-                    ball.position.set(event.data.position.x, event.data.position.y, -event.data.position.z)
-                    if (!self.showTrajectory && event.data.type === <?= SoundType::GRENADE_LAND->value ?>) {
-                        setTimeout(() => ball.visible = false, 2000)
+                if (event.code === <?= EventList::map[SoundEvent::class] ?>) {
+                    if ([<?= SoundType::GRENADE_LAND->value ?>, <?= SoundType::GRENADE_BOUNCE->value ?>, <?= SoundType::GRENADE_AIR->value ?>].includes(event.data.type)) {
+                        const ball = self.showTrajectory ? self.createBall(self.throwables[event.data.extra.id]) : self.throwables[event.data.extra.id]
+                        ball.visible = true
+                        ball.position.set(event.data.position.x, event.data.position.y, -event.data.position.z)
+                        if (!self.showTrajectory && event.data.type === <?= SoundType::GRENADE_LAND->value ?>) {
+                            setTimeout(() => ball.visible = false, 2000)
+                        }
+                    }
+                    if (event.data.type === <?= SoundType::FLAME_SPAWN->value ?>) {
+                        const color = new THREE.Color(`hsl(53, 100%, ${Math.random() * 70 + 20}%, 1)`)
+                        let flame = self.createBox(event.data.extra.size, event.data.extra.height, event.data.extra.size, color)
+                        if (self.flammable[event.data.extra.fire] === undefined) {
+                            self.flammable[event.data.extra.fire] = {}
+                        }
+                        self.flammable[event.data.extra.fire][`${event.data.position.x}-${event.data.position.y}-${event.data.position.z}`] = flame
+                        flame.position.set(event.data.position.x, event.data.position.y + (event.data.extra.height /  2), -event.data.position.z)
+                    }
+                    if (event.data.type === <?= SoundType::FLAME_EXTINGUISH->value ?>) {
+                        const flame = self.flammable[event.data.extra.fire][`${event.data.position.x}-${event.data.position.y}-${event.data.position.z}`]
+                        flame.visible = false
                     }
                 }
             })