Merge pull request #795 from vlidholt/master

Additions to demo game

examples/game/lib/constraint.dart

@@ -17,8 +17,9 @@ double _dampenRotation(double src, double dst, double dampening) {
 }
 
 class ConstraintRotationToMovement {
-  ConstraintRotationToMovement([this.dampening]);
+  ConstraintRotationToMovement([this.baseRotation = 0.0, this.dampening]);
   final double dampening;
+  final double baseRotation;
 
   Point _lastPosition;
 
@@ -27,12 +28,12 @@ class ConstraintRotationToMovement {
   }
 
   void constrain(Node node, double dt) {
-    assert(_lastPosition != null);
+    if (_lastPosition == null) return;
     if (_lastPosition == node.position) return;
 
     // Get the target angle
     Offset offset = node.position - _lastPosition;
-    double target = degrees(GameMath.atan2(offset.dy, offset.dx));
+    double target = degrees(GameMath.atan2(offset.dy, offset.dx)) + baseRotation;
 
     if (dampening == null)
       node.rotation = target;

examples/game/lib/game_demo.dart

@@ -6,6 +6,5 @@ import 'sprites.dart';
 
 import 'package:sky/rendering/object.dart';
 import 'package:sky/widgets/framework.dart';
-import 'package:sky/animation/curves.dart';
 
 part 'game_demo_node.dart';

examples/game/lib/game_demo_node.dart

@@ -48,7 +48,7 @@ class GameDemoNode extends NodeWithSize {
     _hud = new Hud(_spritesUI);
     addChild(_hud);
 
-
+    // Add initial game objects
     addObjects();
   }
 
@@ -195,6 +195,7 @@ class GameDemoNode extends NodeWithSize {
                             yPos + _chunkSpacing * randomDouble());
       _objectFactory.addGameObject(type, pos);
     }
+    _objectFactory.addGameObject(GameObjectType.movingEnemy, new Point(0.0, yPos + 160.0));
   }
 
   void fire() {
@@ -233,66 +234,6 @@ class GameDemoNode extends NodeWithSize {
   }
 }
 
-class VirtualJoystick extends NodeWithSize {
-  VirtualJoystick() : super(new Size(160.0, 160.0)) {
-    userInteractionEnabled = true;
-    handleMultiplePointers = false;
-    position = new Point(160.0, -20.0);
-    pivot = new Point(0.5, 1.0);
-    _center = new Point(size.width / 2.0, size.height / 2.0);
-    _handlePos = _center;
-
-    _paintHandle = new Paint()
-      ..color=new Color(0xffffffff);
-    _paintControl = new Paint()
-      ..color=new Color(0xffffffff)
-      ..strokeWidth = 1.0
-      ..setStyle(sky.PaintingStyle.stroke);
-  }
-
-  Point value = Point.origin;
-
-  bool _isDown = false;
-  bool get isDown => _isDown;
-
-  Point _pointerDownAt;
-  Point _center;
-  Point _handlePos;
-
-  Paint _paintHandle;
-  Paint _paintControl;
-
-  bool handleEvent(SpriteBoxEvent event) {
-    if (event.type == "pointerdown") {
-      _pointerDownAt = event.boxPosition;
-      actions.stopAll();
-      _isDown = true;
-    }
-    else if (event.type == "pointerup" || event.type == "pointercancel") {
-      _pointerDownAt = null;
-      value = Point.origin;
-      ActionTween moveToCenter = new ActionTween((a) => _handlePos = a, _handlePos, _center, 0.4, elasticOut);
-      actions.run(moveToCenter);
-      _isDown = false;
-    } else if (event.type == "pointermove") {
-      Offset movedDist = event.boxPosition - _pointerDownAt;
-
-      value = new Point(
-        (movedDist.dx / 80.0).clamp(-1.0, 1.0),
-        (movedDist.dy / 80.0).clamp(-1.0, 1.0));
-
-        _handlePos = _center + new Offset(value.x * 40.0, value.y * 40.0);
-    }
-    return true;
-  }
-
-  void paint(PaintingCanvas canvas) {
-    applyTransformForPivot(canvas);
-    canvas.drawCircle(_handlePos, 25.0, _paintHandle);
-    canvas.drawCircle(_center, 40.0, _paintControl);
-  }
-}
-
 class Level extends Node {
   Level() {
     position = new Point(160.0, 0.0);
@@ -482,9 +423,41 @@ class AsteroidSmall extends Asteroid {
   }
 }
 
+class MovingEnemy extends Obstacle {
+  MovingEnemy(GameObjectFactory f) : super(f) {
+    _sprt = new Sprite(f.sheet["ship.png"]);
+    _sprt.scale = 0.2;
+    radius = 12.0;
+    maxDamage = 2.0;
+    addChild(_sprt);
+
+    constraints = [new ConstraintRotationToMovement(0.0, 0.5)];
+  }
+
+  void setupActions() {
+    List<Offset> offsets = [
+      new Offset(-160.0, 160.0),
+      new Offset(-80.0, -160.0),
+      new Offset(0.0, 160.0),
+      new Offset(80.0, -160.0),
+      new Offset(160.0, 160.0)];
+
+    List<Point> points = [];
+    for (Offset offset in offsets) {
+      points.add(position + offset);
+    }
+
+    ActionSpline spline = new ActionSpline((a) => position = a, points, 4.0);
+    actions.run(new ActionRepeatForever(spline));
+  }
+
+  Sprite _sprt;
+}
+
 enum GameObjectType {
   asteroidBig,
   asteroidSmall,
+  movingEnemy,
 }
 
 class GameObjectFactory {
@@ -500,6 +473,8 @@ class GameObjectFactory {
       obj = new AsteroidBig(this);
     else if (type == GameObjectType.asteroidSmall)
       obj = new AsteroidSmall(this);
+    else if (type == GameObjectType.movingEnemy)
+      obj = new MovingEnemy(this);
 
     obj.position = pos;
     obj.setupActions();

examples/game/lib/sprites.dart

@@ -39,3 +39,4 @@ part 'sprite_box.dart';
 part 'sprite_widget.dart';
 part 'texture.dart';
 part 'util.dart';
+part 'virtual_joystick.dart';

examples/game/lib/virtual_joystick.dart

+part of sprites;
+
+class VirtualJoystick extends NodeWithSize {
+  VirtualJoystick() : super(new Size(160.0, 160.0)) {
+    userInteractionEnabled = true;
+    handleMultiplePointers = false;
+    position = new Point(160.0, -20.0);
+    pivot = new Point(0.5, 1.0);
+    _center = new Point(size.width / 2.0, size.height / 2.0);
+    _handlePos = _center;
+
+    _paintHandle = new Paint()
+      ..color=new Color(0xffffffff);
+    _paintControl = new Paint()
+      ..color=new Color(0xffffffff)
+      ..strokeWidth = 1.0
+      ..setStyle(PaintingStyle.stroke);
+  }
+
+  Point _value = Point.origin;
+  Point get value => _value;
+
+  bool _isDown = false;
+  bool get isDown => _isDown;
+
+  Point _pointerDownAt;
+  Point _center;
+  Point _handlePos;
+
+  Paint _paintHandle;
+  Paint _paintControl;
+
+  bool handleEvent(SpriteBoxEvent event) {
+    if (event.type == "pointerdown") {
+      _pointerDownAt = event.boxPosition;
+      actions.stopAll();
+      _isDown = true;
+    }
+    else if (event.type == "pointerup" || event.type == "pointercancel") {
+      _pointerDownAt = null;
+      _value = Point.origin;
+      ActionTween moveToCenter = new ActionTween((a) => _handlePos = a, _handlePos, _center, 0.4, elasticOut);
+      actions.run(moveToCenter);
+      _isDown = false;
+    } else if (event.type == "pointermove") {
+      Offset movedDist = event.boxPosition - _pointerDownAt;
+
+      _value = new Point(
+        (movedDist.dx / 80.0).clamp(-1.0, 1.0),
+        (movedDist.dy / 80.0).clamp(-1.0, 1.0));
+
+        _handlePos = _center + new Offset(_value.x * 40.0, _value.y * 40.0);
+    }
+    return true;
+  }
+
+  void paint(PaintingCanvas canvas) {
+    applyTransformForPivot(canvas);
+    canvas.drawCircle(_handlePos, 25.0, _paintHandle);
+    canvas.drawCircle(_center, 40.0, _paintControl);
+  }
+}