Tank animations & FX

core/src/mindustry/entities/comp/TankComp.java

@@ -1,8 +1,10 @@
 package mindustry.entities.comp;
 
+import arc.math.*;
 import arc.math.geom.*;
 import arc.util.*;
 import mindustry.annotations.Annotations.*;
+import mindustry.entities.*;
 import mindustry.gen.*;
 import mindustry.type.*;
 import mindustry.world.blocks.environment.*;
@@ -11,14 +13,36 @@ import static mindustry.Vars.*;
 
 @Component
 abstract class TankComp implements Posc, Flyingc, Hitboxc, Unitc, ElevationMovec{
-    @Import float x, y, hitSize;
+    @Import float x, y, hitSize, rotation;
     @Import UnitType type;
 
+    transient private float treadEffectTime;
+
     transient float treadTime;
     transient boolean walked;
 
     @Override
     public void update(){
+        //dust
+        if(walked && !headless){
+            treadEffectTime += Time.delta;
+            if(treadEffectTime >= 6f){
+                var treadRegion = type.treadRegion;
+                var treadRect = type.treadRect;
+
+                float xOffset = (treadRegion.width/2f - (treadRect.x + treadRect.width/2f)) / 4f;
+                float yOffset = (treadRegion.height/2f - (treadRect.y + treadRect.height/2f)) / 4f;
+
+                for(int i : Mathf.signs){
+                    Tmp.v1.set(xOffset * i, yOffset - treadRect.height / 2f / 4f).rotate(rotation - 90);
+
+                    Effect.floorDustAngle(type.treadEffect, Tmp.v1.x + x, Tmp.v1.y + y, rotation + 180f);
+                }
+
+                treadEffectTime = 0f;
+            }
+        }
+
         //trigger animation only when walking manually
         if(walked || net.client()){
             float len = deltaLen();