Fix sub-pixel jitter after tile separation

Author: danitpeck

src/physics/arcade/tilemap/ProcessTileSeparationX.js

@@ -27,6 +27,10 @@ var ProcessTileSeparationX = function (body, x)
     }
 
     body.position.x -= x;
+
+    // Snap to integer to avoid sub-pixel jitter (tiles are always at whole coords)
+    body.position.x = Math.round(body.position.x);
+
     body.updateCenter();
 
     if (body.bounce.x === 0)

src/physics/arcade/tilemap/ProcessTileSeparationY.js

@@ -27,6 +27,10 @@ var ProcessTileSeparationY = function (body, y)
     }
 
     body.position.y -= y;
+
+    // Snap to integer to avoid sub-pixel jitter (tiles are always at whole coords)
+    body.position.y = Math.round(body.position.y);
+
     body.updateCenter();
 
     if (body.bounce.y === 0)