address comments

doc/examples/effects/combined_effects/lib/square.dart

@@ -18,6 +18,6 @@ class Square extends PositionComponent {
   @override
   void render(Canvas canvas) {
     super.render(canvas);
-    canvas.drawRect(toZeroRect(), _paint);
+    canvas.drawRect(toOriginRect(), _paint);
   }
 }

doc/examples/effects/infinite_effects/lib/square.dart

@@ -18,6 +18,6 @@ class Square extends PositionComponent {
   @override
   void render(Canvas canvas) {
     super.render(canvas);
-    canvas.drawRect(toZeroRect(), _paint);
+    canvas.drawRect(toOriginRect(), _paint);
   }
 }

doc/examples/effects/sequence_effect/lib/square.dart

@@ -18,6 +18,6 @@ class Square extends PositionComponent {
   @override
   void render(Canvas canvas) {
     super.render(canvas);
-    canvas.drawRect(toZeroRect(), _paint);
+    canvas.drawRect(toOriginRect(), _paint);
   }
 }

doc/examples/effects/simple/lib/square.dart

@@ -13,6 +13,6 @@ class Square extends PositionComponent {
   @override
   void render(Canvas canvas) {
     super.render(canvas);
-    canvas.drawRect(toZeroRect(), _paint);
+    canvas.drawRect(toOriginRect(), _paint);
   }
 }

doc/examples/gestures/lib/main_tapables.dart

@@ -30,7 +30,7 @@ class TapableSquare extends PositionComponent with Tapable {
   @override
   void render(Canvas canvas) {
     super.render(canvas);
-    canvas.drawRect(toZeroRect(), _beenPressed ? _grey : _white);
+    canvas.drawRect(toOriginRect(), _beenPressed ? _grey : _white);
   }
 
   @override

doc/examples/sound/lib/main.dart

@@ -20,7 +20,7 @@ class Ball extends PositionComponent {
   @override
   void render(Canvas c) {
     super.render(c);
-    c.drawOval(toZeroRect(), paint);
+    c.drawOval(toOriginRect(), paint);
   }
 
   @override

example/lib/main.dart

@@ -31,7 +31,7 @@ class Square extends PositionComponent with HasGameRef<MyGame> {
   void render(Canvas c) {
     super.render(c);
 
-    c.drawRect(toZeroRect(), white);
+    c.drawRect(toOriginRect(), white);
     c.drawRect(const Rect.fromLTWH(0, 0, 3, 3), red);
     c.drawRect(Rect.fromLTWH(width / 2, height / 2, 3, 3), blue);
   }

lib/components/nine_tile_box_component.dart

@@ -18,6 +18,6 @@ class NineTileBoxComponent extends PositionComponent {
   @override
   void render(Canvas c) {
     super.render(c);
-    nineTileBox.drawRect(c, toZeroRect());
+    nineTileBox.drawRect(c, toOriginRect());
   }
 }

lib/components/position_component.dart

@@ -87,7 +87,7 @@ abstract class PositionComponent extends Component {
   /// Returns the size of this component starting at (0, 0).
   /// Effectively this is it's position with respect to itself.
   /// Use this if the canvas is already translated by (x, y).
-  Rect toZeroRect() => Rect.fromLTWH(0, 0, width, height);
+  Rect toOriginRect() => Rect.fromLTWH(0, 0, width, height);
 
   /// Returns the relative position/size of this component.
   /// Relative because it might be translated by their parents (which is not considered here).
@@ -116,7 +116,7 @@ abstract class PositionComponent extends Component {
   }
 
   void renderDebugMode(Canvas canvas) {
-    canvas.drawRect(toZeroRect(), _debugPaint);
+    canvas.drawRect(toOriginRect(), _debugPaint);
     debugTextConfig.render(
         canvas,
         'x: ${x.toStringAsFixed(2)} y:${y.toStringAsFixed(2)}',
@@ -131,7 +131,7 @@ abstract class PositionComponent extends Component {
         Position(width - 50, height));
   }
 
-  void prepareCanvas(Canvas canvas) {
+  void _prepareCanvas(Canvas canvas) {
     canvas.translate(x, y);
 
     canvas.rotate(angle);
@@ -201,7 +201,7 @@ abstract class PositionComponent extends Component {
   @mustCallSuper
   @override
   void render(Canvas canvas) {
-    prepareCanvas(canvas);
+    _prepareCanvas(canvas);
 
     if (debugMode) {
       renderDebugMode(canvas);

lib/components/text_box_component.dart

@@ -148,7 +148,7 @@ class TextBoxComponent extends PositionComponent with Resizable {
 
   Future<Image> _redrawCache() {
     final PictureRecorder recorder = PictureRecorder();
-    final Canvas c = Canvas(recorder, toZeroRect());
+    final Canvas c = Canvas(recorder, toOriginRect());
     _fullRender(c);
     return recorder.endRecording().toImage(width.toInt(), height.toInt());
   }