Animation performance test script

examples/animationPerfTest.js

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+//
+//  Created by Bradley Austin Davis on 2015/07/01
+//  Copyright 2015 High Fidelity, Inc.
+//  
+//  Distributed under the Apache License, Version 2.0.
+//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
+//
+
+var NUM_MOONS = 20; 
+// 1 = 60Hz, 2 = 30Hz, 3 = 20Hz, etc
+var UPDATE_FREQUENCY_DIVISOR = 2;
+
+var MAX_RANGE = 75.0; 
+var LIFETIME = 600;    
+var SCALE = 0.1;
+
+var center = Vec3.sum(MyAvatar.position, 
+                 Vec3.multiply(MAX_RANGE * SCALE, Quat.getFront(Camera.getOrientation())));
+
+var DEGREES_TO_RADIANS = Math.PI / 180.0;
+var PARTICLE_MIN_SIZE = 2.50; 
+var PARTICLE_MAX_SIZE = 2.50;
+
+
+var planet = Entities.addEntity({ 
+        type: "Sphere",
+        position: center,  
+        dimensions: { x: 10 * SCALE, y: 10 * SCALE, z: 10 * SCALE }, 
+        color: { red: 0, green: 0, blue: 255 },
+        ignoreCollisions: true,
+        collisionsWillMove: false,
+        lifetime: LIFETIME
+});
+
+var moons = [];
+
+//  Create initial test particles that will move according to gravity from the planets
+for (var i = 0; i < NUM_MOONS; i++) {
+	var radius = PARTICLE_MIN_SIZE + Math.random() * PARTICLE_MAX_SIZE;
+	radius *= SCALE;
+	var gray = Math.random() * 155;
+	var position = { x: 10 , y: i * 3, z: 0 };
+	var color = { red: 100 + gray, green: 100 + gray, blue: 100 + gray };
+	if (i == 0) {
+		color = { red: 255, green: 0, blue: 0 };
+		radius = 6 * SCALE
+	}
+	moons.push(Entities.addEntity({ 
+		type: "Sphere",
+		position: Vec3.sum(center, position),  
+		dimensions: { x: radius, y: radius, z: radius }, 
+		color: color,
+		ignoreCollisions: true,
+		lifetime: LIFETIME,
+		collisionsWillMove: false 
+	})); 
+}
+
+Script.update.connect(update);
+
+function scriptEnding() {
+	Entities.deleteEntity(planet);
+    for (var i = 0; i < moons.length; i++) {
+        Entities.deleteEntity(moons[i]);
+    }
+}
+
+var totalTime = 0.0;
+var updateCount = 0;
+function update(deltaTime) {
+    //  Apply gravitational force from planets
+    totalTime += deltaTime;
+	updateCount++;
+	if (0 != updateCount % UPDATE_FREQUENCY_DIVISOR) {
+		return;
+	}
+	
+    var planetProperties = Entities.getEntityProperties(planet);
+    var center = planetProperties.position;
+    var particlePos = Entities.getEntityProperties(moons[0]).position;
+    var relativePos = Vec3.subtract(particlePos.position, center);
+    for (var t = 0; t < moons.length; t++) {
+		var thetaDelta = (Math.PI * 2.0 / NUM_MOONS) * t;
+		var y = Math.sin(totalTime + thetaDelta) * 10.0 * SCALE;
+		var x = Math.cos(totalTime + thetaDelta) * 10.0 * SCALE;
+        var newBasePos = Vec3.sum({ x: 0, y: y, z: x }, center);
+        Entities.editEntity(moons[t], { position: newBasePos}); 
+    }
+}
+
+Script.scriptEnding.connect(scriptEnding);