The dissoluted devourer zombie (#34057)

data/json/effects.json

@@ -1773,6 +1773,26 @@
     "desc": [ "You've been struck by lightning, and feel... different." ],
     "base_mods": { "speed_mod": [ 50 ] }
   },
+  {
+    "type": "effect_type",
+    "id": "grown_of_fuse",
+    "name": [ "Grown of Fusion" ],
+    "desc": [ "AI effect to increase stats after fusing with another critter. 1 stack means one absorbed max_hp." ],
+    "//": "stats modified by the zombie_fuse special attack.",
+    "//1": "scaling:",
+    "//2": "/48 HP: +0,5 melee_skill, +0,5 dodge_skill (unexpected movement), +5 Speed (bigger steps&more to attack with), +4 bash",
+    "//3": "/160 HP: +1 size",
+    "max_intensity": 480,
+    "base_mods": { "hit_mod": [ 0.0104 ], "dodge_mod": [ 0.0104 ], "speed_mod": [ 0.1042 ], "bash_mod": [ 0.08333 ] },
+    "scaling_mods": {
+      "hit_mod": [ 0.0104 ],
+      "dodge_mod": [ 0.0104 ],
+      "speed_mod": [ 0.1042 ],
+      "bash_mod": [ 0.08333 ],
+      "growth_mod": [ 0.00625 ]
+    },
+    "int_decay_step": 0
+  },
   {
     "type": "effect_type",
     "id": "has_og_comm_freq"

data/json/monsters/monsters.json

@@ -531,6 +531,56 @@
       "FILTHY"
     ]
   },
+  {
+    "id": "mon_devourer",
+    "type": "MONSTER",
+    "name": "dissoluted devourer",
+    "description": "Human bodies fused together into a colossus with heads and limbs sticking out of its bloated body. You may have trouble estimating its healthiness and its capabilities might change.",
+    "default_faction": "zombie",
+    "bodytype": "human",
+    "species": [ "ZOMBIE", "HUMAN" ],
+    "diff": 8,
+    "volume": "92500 ml",
+    "weight": 120000,
+    "hp": 112,
+    "speed": 60,
+    "material": [ "flesh" ],
+    "symbol": "Z",
+    "color": "dark_gray_yellow",
+    "aggression": 100,
+    "morale": 100,
+    "melee_skill": 4,
+    "melee_dice": 3,
+    "melee_dice_sides": 3,
+    "melee_cut": 0,
+    "armor_bash": 5,
+    "armor_cut": 5,
+    "vision_night": 3,
+    "harvest": "zombie",
+    "special_attacks": [ [ "GRAB", 7 ], [ "scratch", 20 ], [ "ZOMBIE_FUSE", 80 ] ],
+    "death_drops": {
+      "subtype": "collection",
+      "groups": [ "default_zombie_death_drops", "default_zombie_death_drops", "default_zombie_death_drops" ]
+    },
+    "death_function": [ "SPLATTER", "NORMAL" ],
+    "flags": [
+      "SEES",
+      "HEARS",
+      "SMELLS",
+      "STUMBLES",
+      "WARM",
+      "BASHES",
+      "GROUP_BASH",
+      "POISON",
+      "NO_BREATHE",
+      "REVIVES",
+      "BILE_BLOOD",
+      "PUSH_MON",
+      "PATH_AVOID_DANGER_1",
+      "FILTHY",
+      "REGENERATES_1"
+    ]
+  },
   {
     "id": "mon_breather",
     "type": "MONSTER",
@@ -4775,6 +4825,7 @@
     "death_drops": "default_zombie_death_drops",
     "death_function": [ "NORMAL" ],
     "burn_into": "mon_zombie_scorched",
+    "upgrades": { "half_life": 23, "into": "mon_devourer" },
     "flags": [
       "SEES",
       "HEARS",

src/creature.cpp

@@ -1473,6 +1473,7 @@ void Creature::set_armor_cut_bonus( int ncutarm )
     armor_cut_bonus = ncutarm;
 }
 
+
 void Creature::set_speed_base( int nspeed )
 {
     speed_base = nspeed;
@@ -1485,6 +1486,7 @@ void Creature::set_dodge_bonus( float ndodge )
 {
     dodge_bonus = ndodge;
 }
+
 void Creature::set_block_bonus( int nblock )
 {
     block_bonus = nblock;

src/creature.h

@@ -50,11 +50,11 @@ struct pathfinding_settings;
 struct trap;
 
 enum m_size : int {
-    MS_TINY = 0,    // Squirrel
-    MS_SMALL,      // Dog
-    MS_MEDIUM,    // Human
-    MS_LARGE,    // Cow
-    MS_HUGE     // TAAAANK
+    MS_TINY = 1,    // Squirrel
+    MS_SMALL = 2,      // Dog
+    MS_MEDIUM = 3,    // Human
+    MS_LARGE = 4,    // Cow
+    MS_HUGE = 5    // TAAAANK
 };
 
 enum FacingDirection {
@@ -342,7 +342,7 @@ class Creature
         /** Removes a listed effect. bp = num_bp means to remove all effects of
          * a given type, targeted or untargeted. Returns true if anything was
          * removed. */
-        bool remove_effect( const efftype_id &eff_id, body_part bp = num_bp );
+        virtual bool remove_effect( const efftype_id &eff_id, body_part bp = num_bp );
         /** Remove all effects. */
         void clear_effects();
         /** Check if creature has the matching effect. bp = num_bp means to check if the Creature has any effect
@@ -745,7 +745,6 @@ class Creature
 
         int armor_bash_bonus;
         int armor_cut_bonus;
-
         int speed_base; // only speed needs a base, the rest are assumed at 0 and calculated off skills
 
         int speed_bonus;

src/effect.cpp

@@ -343,6 +343,13 @@ bool effect_type::load_mod_data( JsonObject &jo, const std::string &member )
         extract_effect( j, mod_data, "healing_head",    member, "HEAL_HEAD",  "amount" );
         extract_effect( j, mod_data, "healing_torso",   member, "HEAL_TORSO", "amount" );
 
+        // creature stats mod
+        extract_effect( j, mod_data, "dodge_mod",    member, "DODGE",  "min" );
+        extract_effect( j, mod_data, "hit_mod",    member, "HIT",  "min" );
+        extract_effect( j, mod_data, "bash_mod",    member, "BASH",  "min" );
+        extract_effect( j, mod_data, "cut_mod",    member, "CUT",  "min" );
+        extract_effect( j, mod_data, "growth_mod",    member, "GROWTH",  "min" );
+
         return true;
     } else {
         return false;
@@ -465,6 +472,11 @@ bool effect_type::load_decay_msgs( JsonObject &jo, const std::string &member )
     return false;
 }
 
+int effect_type::get_max_intensity() const
+{
+    return max_intensity;
+}
+
 effect effect::null_effect;
 
 bool effect::is_null() const

src/effect.h

@@ -82,6 +82,9 @@ class effect_type
         /** Registers the effect in the global map */
         static void register_ma_buff_effect( const effect_type &eff );
 
+        /** Returns the maximum intensity of this type. */
+        int get_max_intensity() const;
+
     protected:
         int max_intensity;
         int max_effective_intensity;

src/monattack.cpp

@@ -135,6 +135,7 @@ const efftype_id effect_fungus( "fungus" );
 const efftype_id effect_glowing( "glowing" );
 const efftype_id effect_got_checked( "got_checked" );
 const efftype_id effect_grabbed( "grabbed" );
+const efftype_id effect_grown_of_fuse( "grown_of_fuse" );
 const efftype_id effect_grabbing( "grabbing" );
 const efftype_id effect_has_bag( "has_bag" );
 const efftype_id effect_infected( "infected" );
@@ -5269,6 +5270,36 @@ bool mattack::stretch_attack( monster *z )
     return true;
 }
 
+bool mattack::zombie_fuse( monster *z )
+{
+    monster *critter = nullptr;
+    for( const tripoint &p : g->m.points_in_radius( z->pos(), 1 ) ) {
+        critter = g->critter_at<monster>( p );
+        if( critter != nullptr && critter->faction == z->faction
+            && critter != z && critter->get_size() <= z->get_size() ) {
+            break;
+        }
+    }
+
+    if( critter == nullptr ||
+        ( z->get_hp() + critter->get_hp() > z->get_hp_max() +
+          effect_grown_of_fuse.obj().get_max_intensity() ) ) {
+        return false;
+    }
+    if( g->u.sees( *z ) ) {
+        add_msg( _( "The %1$s fuses with the %2$s." ),
+                 critter->name(),
+                 z->name() );
+    }
+    z->moves -= 200;
+    z->add_effect( effect_grown_of_fuse, 10_days, num_bp, true,
+                   critter->get_hp_max() + z->get_effect( effect_grown_of_fuse ).get_intensity() );
+    z->heal( critter->get_hp(), true );
+    critter->death_drops = false;
+    critter->die( z );
+    return true;
+}
+
 bool mattack::doot( monster *z )
 {
     z->moves -= 300;

src/monattack.h

@@ -99,6 +99,7 @@ bool kamikaze( monster *z );
 bool grenadier( monster *z );
 bool grenadier_elite( monster *z );
 bool doot( monster *z );
+bool zombie_fuse( monster *z );
 
 void taze( monster *z, Creature *target );
 void rifle( monster *z, Creature *target );             // Automated M4

src/monster.cpp

@@ -212,6 +212,8 @@ monster::monster()
     upgrade_time = -1;
     last_updated = 0;
     biosig_timer = -1;
+
+    monster::reset_bonuses();
 }
 
 monster::monster( const mtype_id &id ) : monster()
@@ -620,6 +622,10 @@ int monster::print_info( const catacurses::window &w, int vStart, int vLines, in
         mvwprintz( w, point( column, vStart++ ), c_white, _( "Rider: %s" ), mounted_player->disp_name() );
     }
 
+    if( effect_cache[MODIFIED] ) {
+        wprintz( w, c_light_gray, _( " It is %s." ), size_names.at( get_size() ) );
+    }
+
     std::vector<std::string> lines = foldstring( type->get_description(), getmaxx( w ) - 1 - column );
     int numlines = lines.size();
     for( int i = 0; i < numlines && vStart <= vEnd; i++ ) {
@@ -1685,6 +1691,29 @@ void monster::add_effect( const efftype_id &eff_id, const time_duration dur, bod
 {
     // Effects are not applied to specific monster body part
     Creature::add_effect( eff_id, dur, num_bp, permanent, intensity, force, deferred );
+
+    effect_cache[MODIFIED] = effect_cache[MODIFIED] | effect_is_modifier_enabled( get_effect(
+                                 eff_id ) );
+}
+
+bool monster::remove_effect( const efftype_id &eff_id, body_part bp )
+{
+    bool modif = effect_is_modifier_enabled( get_effect( eff_id ) );
+    bool rtrn = Creature::remove_effect( eff_id, bp );
+
+    if( modif && effect_cache[MODIFIED] ) {
+        modif = false;
+        for( const auto &ef : *effects ) {
+            modif |= effect_is_modifier_enabled( ef.second.at( num_bp ) );
+        }
+        effect_cache[MODIFIED] = modif;
+    }
+    return rtrn;
+}
+
+bool monster::effect_is_modifier_enabled( const effect &eff )
+{
+    return eff.get_mod( "GROWTH" ) != 0;
 }
 
 std::string monster::get_effect_status() const
@@ -2242,6 +2271,17 @@ bool monster::check_mech_powered() const
     return true;
 }
 
+int monster::get_effect_bonus( std::string arg, bool reduced ) const
+{
+    int rtrn = 0;
+    for( const auto effbody : *effects ) {
+        for( const auto ef : effbody.second ) {
+            rtrn += ef.second.get_mod( arg, reduced );
+        }
+    }
+    return rtrn;
+}
+
 void monster::drop_items_on_death()
 {
     if( is_hallucination() ) {
@@ -2293,6 +2333,10 @@ void monster::process_one_effect( effect &it, bool is_new )
     };
 
     mod_speed_bonus( get_effect( "SPEED", reduced ) );
+    mod_dodge_bonus( get_effect( "DODGE", reduced ) );
+    mod_hit_bonus( get_effect( "HIT", reduced ) );
+    mod_bash_bonus( get_effect( "BASH", reduced ) );
+    mod_cut_bonus( get_effect( "CUT", reduced ) );
 
     int val = get_effect( "HURT", reduced );
     if( val > 0 ) {
@@ -2528,17 +2572,29 @@ field_type_id monster::gibType() const
 
 m_size monster::get_size() const
 {
-    return type->size;
+    if( effect_cache[MODIFIED] ) {
+        return m_size( type->size + get_effect_bonus( "GROWTH" ) );
+    } else {
+        return type->size;
+    }
 }
 
 units::mass monster::get_weight() const
 {
-    return type->weight;
+    if( effect_cache[MODIFIED] ) {
+        return units::operator*( type->weight, get_size() / type->size );
+    } else {
+        return type->weight;
+    }
 }
 
 units::volume monster::get_volume() const
 {
-    return type->volume;
+    if( effect_cache[MODIFIED] ) {
+        return units::operator*( type->volume, get_size() / type->size );
+    } else {
+        return type->volume;
+    }
 }
 
 void monster::add_msg_if_npc( const std::string &msg ) const

src/monster.h

@@ -68,6 +68,7 @@ enum monster_effect_cache_fields {
     MOVEMENT_IMPAIRED = 0,
     FLEEING,
     VISION_IMPAIRED,
+    MODIFIED, // Uses data hold by effects instead of itself.
     NUM_MEFF
 };
 
@@ -320,6 +321,10 @@ class monster : public Creature
         void add_effect( const efftype_id &eff_id, time_duration dur, body_part bp = num_bp,
                          bool permanent = false,
                          int intensity = 0, bool force = false, bool deferred = false ) override;
+        /** Same for removing effects.*/
+        bool remove_effect( const efftype_id &eff_id, body_part bp = num_bp ) override;
+        /** Returns true for an effect, whoose funcionality is enabled through effect_cache[MODIFIED] to reduce overhead.*/
+        bool effect_is_modifier_enabled( const effect &eff );
         /** Returns a std::string containing effects for descriptions */
         std::string get_effect_status() const;
 
@@ -378,7 +383,7 @@ class monster : public Creature
         /** Resets stats, and applies effects in an idempotent manner */
         void reset_stats() override;
 
-        void die( Creature *killer ) override; //this is the die from Creature, it calls kill_mon
+        void die( Creature *killer ) override;
         void drop_items_on_death();
 
         // Other
@@ -396,6 +401,9 @@ class monster : public Creature
         bool use_mech_power( int amt );
         bool check_mech_powered() const;
         int mech_str_addition() const;
+        // get an value from the effect data.
+        int get_effect_bonus( std::string arg, bool reduced = false ) const;
+
         /**
          * Makes monster react to heard sound
          *

src/monstergenerator.cpp

@@ -546,6 +546,7 @@ void MonsterGenerator::init_attack()
     add_hardcoded_attack( "GRAB", mattack::grab );
     add_hardcoded_attack( "GRAB_DRAG", mattack::grab_drag );
     add_hardcoded_attack( "DOOT", mattack::doot );
+    add_hardcoded_attack( "ZOMBIE_FUSE", mattack::zombie_fuse );
 }
 
 void MonsterGenerator::init_defense()