no gravity entities with correct trajectory and accurate multishot crossbow trajectories

src/main/java/meteordevelopment/meteorclient/systems/modules/combat/ArrowDodge.java

@@ -119,7 +119,7 @@ private void onTick(TickEvent.Pre event) {
                 UUID owner = ((ProjectileEntityAccessor) e).getOwnerUuid();
                 if (owner != null && owner.equals(mc.player.getUuid())) continue;
             }
-            if (!simulator.set(e, accurate.get(), 0.5D)) continue;
+            if (!simulator.set(e, accurate.get(), 0.5D, false)) continue;
             for (int i = 0; i < (simulationSteps.get() > 0 ? simulationSteps.get() : Integer.MAX_VALUE); i++) {
                 points.add(vec3s.get().set(simulator.pos));
                 if (simulator.tick() != null) break;

src/main/java/meteordevelopment/meteorclient/systems/modules/render/Trajectories.java

@@ -103,6 +103,8 @@ public class Trajectories extends Module {
     private final Pool<Vector3d> vec3s = new Pool<>(Vector3d::new);
     private final List<Path> paths = new ArrayList<>();
 
+    private final double multishotOffset = Math.toRadians(10); // accurate-ish offset of crossbow multishot in radians (10° degrees)
+
     public Trajectories() {
         super(Categories.Render, "trajectories", "Predicts the trajectory of throwable items.");
     }
@@ -146,19 +148,25 @@ private void calculatePath(PlayerEntity player, double tickDelta) {
         getEmptyPath().calculate();
 
         if (itemStack.getItem() instanceof CrossbowItem && EnchantmentHelper.getLevel(Enchantments.MULTISHOT, itemStack) > 0) {
-            if (!simulator.set(player, itemStack, -10, accurate.get(), tickDelta)) return;
+            if (!simulator.set(player, itemStack, multishotOffset, accurate.get(), tickDelta)) return; // left multishot arrow
             getEmptyPath().calculate();
 
-            if (!simulator.set(player, itemStack, 10, accurate.get(), tickDelta)) return;
+            if (!simulator.set(player, itemStack, -multishotOffset, accurate.get(), tickDelta)) return; // right multishot arrow
             getEmptyPath().calculate();
         }
     }
 
     private void calculateFiredPath(Entity entity, double tickDelta) {
         for (Path path : paths) path.clear();
 
+        if (entity.hasNoGravity()) {
+            if (!simulator.set(entity, accurate.get(), tickDelta, true)) return;
+            getEmptyPath().calculate();
+            return;
+        }
+
         // Calculate paths
-        if (!simulator.set(entity, accurate.get(), tickDelta)) return;
+        if (!simulator.set(entity, accurate.get(), tickDelta, false)) return;
         getEmptyPath().calculate();
     }
 

src/main/java/meteordevelopment/meteorclient/utils/entity/ProjectileEntitySimulator.java

@@ -114,21 +114,41 @@ public void set(Entity user, double roll, double speed, double simulated, double
         this.waterDrag = waterDrag;
     }
 
-    public boolean set(Entity entity, boolean accurate, double tickDelta) {
+    public boolean set(Entity entity, boolean accurate, double tickDelta, boolean noGravity) {
         // skip entities in ground
         if (entity instanceof PersistentProjectileEntity && ((ProjectileInGroundAccessor) entity).getInGround()) return false;
 
         if (entity instanceof ArrowEntity arrow) {
             // im not sure if arrow.getVelocity().length() is correct but it works ¯\_(ツ)_/¯
-            set(entity, arrow.getVelocity().length(), 0.05000000074505806, 0.6, accurate, tickDelta);
+            double gravity = 0.05000000074505806;
+            if (noGravity) {
+                gravity = 0;
+            }
+            set(entity, arrow.getVelocity().length(), gravity, 0.6, accurate, tickDelta);
         } else if (entity instanceof EnderPearlEntity || entity instanceof SnowballEntity || entity instanceof EggEntity) {
-            set(entity, 1.5, 0.03, 0.8, accurate, tickDelta);
+            double gravity = 0.03;
+            if (noGravity) {
+                gravity = 0;
+            }
+            set(entity, 1.5, gravity, 0.8, accurate, tickDelta);
         } else if (entity instanceof TridentEntity) {
-            set(entity, 2.5, 0.05000000074505806, 0.99, accurate, tickDelta);
+            double gravity = 0.05000000074505806;
+            if (noGravity) {
+                gravity = 0;
+            }
+            set(entity, 2.5, gravity, 0.99, accurate, tickDelta);
         } else if (entity instanceof ExperienceBottleEntity) {
-            set(entity, 0.7,  0.07, 0.8, accurate, tickDelta);
+            double gravity = 0.07;
+            if (noGravity) {
+                gravity = 0;
+            }
+            set(entity, 0.7,  gravity, 0.8, accurate, tickDelta);
         } else if (entity instanceof ThrownEntity) {
-            set(entity, 0.5, 0.05, 0.8, accurate, tickDelta);
+            double gravity = 0.05;
+            if (noGravity) {
+                gravity = 0;
+            }
+            set(entity, 0.5, gravity, 0.8, accurate, tickDelta);
         } else if (entity instanceof WitherSkullEntity || entity instanceof FireballEntity || entity instanceof DragonFireballEntity) {
             set(entity, 0.95, 0, 0.8, accurate, tickDelta);
         }