Working Springs demo.

examples/wip/springs 1.js

@@ -0,0 +1,92 @@
+
+var game = new Phaser.Game(800, 600, Phaser.CANVAS, 'phaser-example', { preload: preload, create: create, update: update, render: render });
+
+function preload() {
+
+    game.load.image('backdrop', 'assets/pics/remember-me.jpg');
+	game.load.image('box', 'assets/sprites/block.png');
+
+}
+
+var box1;
+var box2;
+var s;
+
+var cursors;
+
+function create() {
+
+    game.world.setBounds(0, 0, 1920, 1200);
+    game.add.sprite(0, 0, 'backdrop');
+
+//    game.physics.gravity.y = -9.78;
+    game.physics.gravity[1] = -9.78;
+
+    // game.physics.onBodyAdded.add(addedToWorld, this);
+
+	box1 = game.add.sprite(200, 200, 'box');
+	box1.physicsEnabled = true;
+	// box1.body.fixedRotation = true;
+	// box1.body.mass = 3;
+
+	box2 = game.add.sprite(400, 200, 'box');
+	box2.physicsEnabled = true;
+	// box2.body.fixedRotation = true;
+
+	s = new Phaser.Physics.Spring(game, box1.body.data, box2.body.data, 2, 10, 1, null, null, [ 0, 70 ], [ 0, 70 ]);
+
+	game.physics.addSpring(s);
+
+        // var s = new p2.Spring(box1, box2, {
+        //     restLength : 1,
+        //     stiffness : 10,
+        //     localAnchorA : [0,0.5],
+        //     localAnchorB : [0,0.5],
+        // });
+        // world.addSpring(s);
+
+	game.camera.follow(box2);
+
+    cursors = game.input.keyboard.createCursorKeys();
+
+    // game.physics.defaultRestitution = 0.8;
+
+}
+
+function addedToWorld(body, world) {
+
+	console.log('Body added for', body);
+
+}
+
+function update() {
+
+	box2.body.setZeroVelocity();
+
+    if (cursors.left.isDown)
+    {
+    	box2.body.moveLeft(400);
+    }
+    else if (cursors.right.isDown)
+    {
+    	box2.body.moveRight(400);
+    }
+
+    if (cursors.up.isDown)
+    {
+    	box2.body.moveUp(400);
+    }
+    else if (cursors.down.isDown)
+    {
+    	box2.body.moveDown(400);
+    }
+
+}
+
+function render() {
+
+	// game.debug.renderText('x: ' + box2.body.velocity.x, 32, 32);
+	// game.debug.renderText('y: ' + box2.body.velocity.y, 32, 64);
+
+}
+

src/physics/Spring.js

@@ -38,22 +38,22 @@ Phaser.Physics.Spring = function (game, bodyA, bodyB, restLength, stiffness, dam
         damping: damping
     };
 
-    if (typeof worldA !== 'undefined')
+    if (typeof worldA !== 'undefined' && worldA !== null)
     {
         options.worldAnchorA = [ game.math.px2p(worldA[0]), game.math.px2p(worldA[1]) ];
     }
 
-    if (typeof worldB !== 'undefined')
+    if (typeof worldB !== 'undefined' && worldB !== null)
     {
         options.worldAnchorB = [ game.math.px2p(worldB[0]), game.math.px2p(worldB[1]) ];
     }
 
-    if (typeof localA !== 'undefined')
+    if (typeof localA !== 'undefined' && localA !== null)
     {
         options.localAnchorA = [ game.math.px2p(localA[0]), game.math.px2p(localA[1]) ];
     }
 
-    if (typeof localB !== 'undefined')
+    if (typeof localB !== 'undefined' && localB !== null)
     {
         options.localAnchorB = [ game.math.px2p(localB[0]), game.math.px2p(localB[1]) ];
     }