1 files changed, 112 insertions, 0 deletions
diff --git a/third_party/webkit/PerformanceTests/MotionMark/tests/master/resources/particles.js b/third_party/webkit/PerformanceTests/MotionMark/tests/master/resources/particles.js
new file mode 100644
index 0000000000..cf474e4142
--- /dev/null
+++ b/third_party/webkit/PerformanceTests/MotionMark/tests/master/resources/particles.js
@@ -0,0 +1,112 @@
+function Particle(stage)
+{
+    this.stage = stage;
+    this.rotater = Stage.randomRotater();
+    this.reset();
+    this.move();
+}
+
+Particle.prototype =
+{
+    sizeMinimum: 40,
+    sizeRange: 10,
+
+    reset: function()
+    {
+        var randSize = Math.round(Math.pow(Pseudo.random(), 4) * this.sizeRange + this.sizeMinimum);
+        this.size = new Point(randSize, randSize);
+        this.minPosition = this.size.center;
+        this.maxPosition = this.stage.size.subtract(this.minPosition);
+    },
+
+    animate: function(timeDelta)
+    {
+        this.rotater.next(timeDelta);
+
+        this.position = this.position.add(this.velocity.multiply(timeDelta));
+        this.velocity.y += 0.03;
+
+        // If particle is going to move off right side
+        if (this.position.x > this.maxPosition.x) {
+            if (this.velocity.x > 0)
+                this.velocity.x *= -1;
+            this.position.x = this.maxPosition.x;
+        } else if (this.position.x < this.minPosition.x) {
+            // If particle is going to move off left side
+            if (this.velocity.x < 0)
+                this.velocity.x *= -1;
+            this.position.x = this.minPosition.x;
+        }
+
+        // If particle is going to move off bottom side
+        if (this.position.y > this.maxPosition.y) {
+            // Adjust direction but maintain magnitude
+            var magnitude = this.velocity.length();
+            this.velocity.x *= 1.5 + .005 * this.size.x;
+            this.velocity = this.velocity.normalize().multiply(magnitude);
+            if (Math.abs(this.velocity.y) < 0.7)
+                this.reset();
+            else {
+                if (this.velocity.y > 0)
+                    this.velocity.y *= -0.999;
+                this.position.y = this.maxPosition.y;
+            }
+        } else if (this.position.y < this.minPosition.y) {
+            // If particle is going to move off top side
+            var magnitude = this.velocity.length();
+            this.velocity.x *= 1.5 + .005 * this.size.x;
+            this.velocity = this.velocity.normalize().multiply(magnitude);
+            if (this.velocity.y < 0)
+                this.velocity.y *= -0.998;
+            this.position.y = this.minPosition.y;
+        }
+
+        this.move();
+    },
+
+    move: function()
+    {
+    }
+}
+
+ParticlesStage = Utilities.createSubclass(Stage,
+    function()
+    {
+        Stage.call(this);
+        this.particles = [];
+    }, {
+
+    animate: function(timeDelta)
+    {
+        timeDelta /= 4;
+        this.particles.forEach(function(particle) {
+            particle.animate(timeDelta);
+        });
+    },
+
+    tune: function(count)
+    {
+        if (count == 0)
+            return;
+
+        if (count > 0) {
+            for (var i = 0; i < count; ++i)
+                this.particles.push(this.createParticle());
+            return;
+        }
+
+        count = Math.min(-count, this.particles.length);
+
+        if (typeof(this.willRemoveParticle) == "function") {
+            for (var i = 0; i < count; ++i)
+                this.willRemoveParticle(this.particles[i]);
+        }
+
+        this.particles.splice(0, count);
+    },
+
+    complexity: function()
+    {
+        return this.particles.length;
+    }
+});