diff --git a/lib/component.dart b/lib/component.dart
index 2de459f4d..5c17cdb2c 100644
--- a/lib/component.dart
+++ b/lib/component.dart
@@ -12,9 +12,7 @@ abstract class Component {
 }
 
 abstract class PositionComponent extends Component {
-  double x = 0.0,
-      y = 0.0,
-      angle = 0.0;
+  double x = 0.0, y = 0.0, angle = 0.0;
 
   double angleBetween(PositionComponent c) {
     return (atan2(c.x - this.x, this.y - c.y) - PI / 2) % (2 * PI);
@@ -23,14 +21,18 @@ abstract class PositionComponent extends Component {
   double distance(PositionComponent c) {
     return sqrt(pow(this.y - c.y, 2) + pow(this.x - c.x, 2));
   }
+
+  void prepareCanvas(Canvas canvas) {
+    canvas.translate(x, y);
+    canvas.rotate(angle); // TODO: rotate around center
+  }
 }
 
 abstract class SpriteComponent extends PositionComponent {
   double width, height;
   Image image;
 
-  final Paint paint = new Paint()
-    ..color = new Color(0xffffffff);
+  final Paint paint = new Paint()..color = new Color(0xffffffff);
 
   SpriteComponent.square(double size, String imagePath)
       : this.rectangle(size, size, imagePath);
@@ -43,26 +45,21 @@ abstract class SpriteComponent extends PositionComponent {
 
   render(Canvas canvas) {
     if (image != null) {
-      _prepareCanvas(canvas);
+      prepareCanvas(canvas);
       _drawImage(canvas);
     }
   }
 
-  void _prepareCanvas(Canvas canvas) {
-    canvas.translate(x, y);
-    canvas.rotate(angle); // TODO: rotate around center
-  }
-
   void _drawImage(Canvas canvas) {
     final Rect outputRect = new Rect.fromLTWH(0.0, 0.0, width, height);
     final Size imageSize =
-    new Size(image.width.toDouble(), image.height.toDouble());
+        new Size(image.width.toDouble(), image.height.toDouble());
     final FittedSizes sizes =
-    applyBoxFit(BoxFit.cover, imageSize, outputRect.size);
+        applyBoxFit(BoxFit.cover, imageSize, outputRect.size);
     final Rect inputSubrect =
-    Alignment.center.inscribe(sizes.source, Offset.zero & imageSize);
+        Alignment.center.inscribe(sizes.source, Offset.zero & imageSize);
     final Rect outputSubrect =
-    Alignment.center.inscribe(sizes.destination, outputRect);
+        Alignment.center.inscribe(sizes.destination, outputRect);
     canvas.drawImageRect(image, inputSubrect, outputSubrect, paint);
   }