fixed unnecessary write to texture if no changes happened

Scripts/Elements/Element.cs

@@ -18,6 +18,7 @@ public class Element {
     protected int lastMove = 0;
 
     private bool active = false;
+    private bool wasMovedThisTick = false;
     private int lastUpdate = -1;
     private Color originalColor;
 
@@ -42,6 +43,7 @@ public class Element {
 
             active = value;
             Chunk.SetElementActive(this, value);
+            Moved();
             // SetDebugColor(value, new Color(0.2f, 0.2f, 0.2f));
         }
     }
@@ -68,6 +70,7 @@ public class Element {
 
     protected virtual void Tick() {
         Vector2I randomDirection = RandomDirectionDown();
+        wasMovedThisTick = false;
 
         if (Chunk.IsEmpty(Position + Vector2I.Down))
             Chunk.Swap(this, Position + Vector2I.Down);
@@ -109,9 +112,15 @@ public class Element {
         if (!Main.Instance.DebugVisualization) return;
 
         this.color = color;
+        wasMovedThisTick = true;
     }
 
     public void Moved() {
         lastMove = Engine.GetFramesDrawn();
+        wasMovedThisTick = true;
+    }
+
+    public bool WasMoved() {
+        return wasMovedThisTick;
     }
 }

Scripts/Level.cs

@@ -69,7 +69,7 @@ public class Level {
         GD.Print("benchmark");
         for (int x = 0; x < chunksPerX; x++) {
             for (int y = 0; y < chunksPerY; y++) {
-                WritePixel<Dirt>(x * chunkResX/2, y * chunkResY/2, 100);
+                WritePixel<Dirt>((x * chunkResX) + chunkResX/2, (y * chunkResY) + chunkResY/2, 100);
             }
         }
     }
@@ -148,13 +148,17 @@ public class Level {
     }
 
     public Image DrawLevel() {
+        // chunk
         for (int cx = 0; cx < chunksPerX; cx++) {
             for (int cy = 0; cy < chunksPerY; cy++) {
 
+                // pixel in chunk
                 for (int x = 0; x < chunkResX; x++) {
                     for (int y = 0; y < chunkResY; y++) {
                         // TODO: multithreading here! use Chunk.DrawLevel() and stitch images together
-                        image.SetPixel(cx*chunkResX + x, cy*chunkResY + y, chunks[cx,cy].Elements[x, y].Color);
+
+                        if (chunks[cx, cy].Elements[x, y].WasMoved())
+                            image.SetPixel(cx*chunkResX + x, cy*chunkResY + y, chunks[cx, cy].Elements[x, y].Color);
                     }
                 }
             }