Added ability to Scale particles when emitted.

Author: photonstorm

examples/particles.php

@@ -33,15 +33,18 @@ function create() {
 
         game.stage.backgroundColor = 0x337799;
 
-        p = game.add.emitter(200, 100, 50);
+        p = game.add.emitter(200, 100, 250);
 
         // p.width = 200;
         // p.height = 200;
 
         //  keys, frames, quantity, collide
         // p.makeParticles(['diamond', 'carrot', 'star']);
-        p.makeParticles('balls', [0,1,2,3,4,5]);
-        // p.makeParticles('pixies', [0,1,2,3]);
+        // p.makeParticles('balls', [0,1,2,3,4,5]);
+        p.makeParticles('pixies', [0,1,2,3]);
+
+        p.minParticleScale = 0.1;
+        p.maxParticleScale = 0.5;
 
         //  Steady constant stream at 250ms delay and 10 seconds lifespan
         // p.start(false, 10000, 250, 100);

src/particles/arcade/Emitter.js

@@ -46,15 +46,25 @@ Phaser.Particles.Arcade.Emitter = function (game, x, y, maxParticles) {
      */
     this.maxParticleSpeed = new Phaser.Point(100, 100);
 
+    /**
+     * The minimum possible scale of a particle.
+     * The default value is 1.
+     */
+    this.minParticleScale = 1;
+
+    /**
+     * The maximum possible scale of a particle.
+     * The default value is 1.
+     */
+    this.maxParticleScale = 1;
+
     /**
      * The minimum possible angular velocity of a particle.  The default value is -360.
-     * NOTE: rotating particles are more expensive to draw than non-rotating ones!
      */
     this.minRotation = -360;
 
     /**
      * The maximum possible angular velocity of a particle.  The default value is 360.
-     * NOTE: rotating particles are more expensive to draw than non-rotating ones!
      */
     this.maxRotation = 360;
 
@@ -325,7 +335,6 @@ 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.x - this.game.rnd.integerInRange(this.left, this.right), this.y - this.game.rnd.integerInRange(this.top, this.bottom));
     }
     else
@@ -366,6 +375,12 @@ Phaser.Particles.Arcade.Emitter.prototype.emitParticle = function () {
         particle.body.angularVelocity = this.minRotation;
     }
 
+    if (this.minParticleScale !== 1 || this.maxParticleScale !== 1)
+    {
+        var scale = this.game.rnd.realInRange(this.minParticleScale, this.maxParticleScale);
+        particle.scale.setTo(scale, scale);
+    }
+
     particle.body.drag.x = this.particleDrag.x;
     particle.body.drag.y = this.particleDrag.y;