From 0a422694797e661b086f6de635007de88d588260 Mon Sep 17 00:00:00 2001
From: Richard Davey <rdavey@gmail.com>
Date: Fri, 13 Sep 2013 03:52:05 +0100
Subject: [PATCH] Group vs. Group collision working - also fixed a bug in the
 Body.reset function that was causing some lovely physics errors :)

---
 examples/collision_group_vs_group.php | 117 ++++++++++++++++++++++++++
 src/particles/arcade/Emitter.js       |   2 +-
 src/physics/arcade/Body.js            |  16 ++--
 3 files changed, 125 insertions(+), 10 deletions(-)
 create mode 100644 examples/collision_group_vs_group.php
diff --git a/examples/collision_group_vs_group.php b/examples/collision_group_vs_group.php
new file mode 100644
index 00000000..0d921cf9
--- /dev/null
+++ b/examples/collision_group_vs_group.php
@@ -0,0 +1,117 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+    <title>phaser.js - a new beginning</title>
+    <?php
+        require('js.php');
+    ?>
+</head>
+<body>
+
+<script type="text/javascript">
+
+(function () {
+
+    var game = new Phaser.Game(800, 600, Phaser.AUTO, '', { preload: preload, create: create, update: update });
+
+    function preload() {
+
+        game.load.image('phaser', 'assets/sprites/phaser-dude.png');
+        game.load.image('bullet', 'assets/misc/bullet0.png');
+        game.load.spritesheet('veggies', 'assets/sprites/fruitnveg32wh37.png', 32, 32);
+
+    }
+
+    var sprite;
+    var bullets;
+    var veggies;
+    var bulletTime = 0;
+
+    var bullet;
+
+    function create() {
+
+        game.stage.backgroundColor = '#2d2d2d';
+
+        //  This will check Group vs. Group collision (bullets vs. veggies!)
+
+        veggies = game.add.group();
+
+        for (var i = 0; i < 50; i++)
+        {
+            var c = veggies.create(game.world.randomX, Math.random() * 500, 'veggies', game.rnd.integerInRange(0, 36));
+            c.name = 'veg' + i;
+            c.body.immovable = true;
+        }
+
+        bullets = game.add.group();
+
+        for (var i = 0; i < 10; i++)
+        {
+            var b = bullets.create(0, 0, 'bullet');
+            b.name = 'bullet' + i;
+            b.exists = false;
+            b.visible = false;
+            b.events.onOutOfBounds.add(resetBullet, this);
+        }
+
+        sprite = game.add.sprite(400, 550, 'phaser');
+
+    }
+
+    function update() {
+
+        sprite.velocity.x = 0;
+        sprite.velocity.y = 0;
+
+        if (game.input.keyboard.isDown(Phaser.Keyboard.LEFT))
+        {
+            sprite.velocity.x = -200;
+        }
+        else if (game.input.keyboard.isDown(Phaser.Keyboard.RIGHT))
+        {
+            sprite.velocity.x = 200;
+        }
+
+        if (game.input.keyboard.isDown(Phaser.Keyboard.SPACEBAR))
+        {
+            fireBullet();
+        }
+
+        game.physics.collide(bullets, veggies, collisionHandler, null, this);
+
+    }
+
+    function fireBullet () {
+
+        if (game.time.now > bulletTime)
+        {
+            bullet = bullets.getFirstExists(false);
+
+            if (bullet)
+            {
+                bullet.reset(sprite.x + 6, sprite.y - 8);
+                bullet.velocity.y = -300;
+                bulletTime = game.time.now + 250;
+            }
+        }
+
+    }
+
+    //  Called if the bullet goes out of the screen
+    function resetBullet (bullet) {
+        bullet.kill();
+    }
+
+    function collisionHandler (bullet, veg) {
+
+        bullet.kill();
+        veg.kill();
+
+    }
+
+})();
+</script>
+
+</body>
+</html>
\ No newline at end of file
diff --git a/src/particles/arcade/Emitter.js b/src/particles/arcade/Emitter.js
index cfb88507..6393abc4 100644
--- a/src/particles/arcade/Emitter.js
+++ b/src/particles/arcade/Emitter.js
@@ -338,7 +338,7 @@ Phaser.Particles.Arcade.Emitter.prototype.emitParticle = function () {
 
     if (this.width > 1 || this.height > 1)
     {
-    	particle.reset(this.x - this.game.rnd.integerInRange(this.left, this.right), this.y - this.game.rnd.integerInRange(this.top, this.bottom));
+    	particle.reset(this.emiteX - this.game.rnd.integerInRange(this.left, this.right), this.emiteY - this.game.rnd.integerInRange(this.top, this.bottom));
     }
     else
     {
diff --git a/src/physics/arcade/Body.js b/src/physics/arcade/Body.js
index 9ebe509e..741e46c2 100644
--- a/src/physics/arcade/Body.js
+++ b/src/physics/arcade/Body.js
@@ -205,18 +205,16 @@ Phaser.Physics.Arcade.Body.prototype = {
 
 	reset: function () {
 
-	    this.velocity = new Phaser.Point;
-	    this.acceleration = new Phaser.Point;
-	    this.drag = new Phaser.Point;
-	    this.gravity = new Phaser.Point;
-	    this.bounce = new Phaser.Point;
-	    this.maxVelocity = new Phaser.Point(10000, 10000);
+		this.velocity.setTo(0, 0);
+		this.acceleration.setTo(0, 0);
 
 	    this.angularVelocity = 0;
 	    this.angularAcceleration = 0;
-	    this.angularDrag = 0;
-	    this.maxAngular = 1000;
-	    this.mass = 1;
+
+		this.x = (this.sprite.x - (this.sprite.anchor.x * this.width)) + this.offset.x;
+		this.y = (this.sprite.y - (this.sprite.anchor.y * this.height)) + this.offset.y;
+		this.lastX = this.x;
+		this.lastY = this.y;
 
 	},
 
