content/hifi-public/ryan/fireNew.js

var center = Vec3.sum(MyAvatar.position, Vec3.multiply(3, Quat.getFront(Camera.getOrientation())));
var ZERO_VEC = {
    x: 0,
    y: 0,
    z: 0
}
var totalTime = 0;
var FIRE_COLOR = {
    red: 255,
    green: 255,
    blue: 255
};
var minLightIntensity = 3;
var maxLightIntensity = 5;

var minTimeFactor = .1;
var maxTimeFactor = 1;

var LIGHT_COLOR = {
    red: 255,
    green: 100,
    blue: 28
}

var animationSettings = JSON.stringify({
    fps: 30,
    running: true,
    loop: true,
    firstFrame: 1,
    lastFrame: 10000
});


var fire = Entities.addEntity({
    type: "ParticleEffect",
    animationSettings: animationSettings,
    textures: "http://hifi-public.s3.amazonaws.com/ryan/demo/Particle-Sprite-Smoke-1.png",
    position: center,
    emitRate: 100,
            colorStart: {
                red: 70,
                green: 70,
                blue: 137
            },
            color: {
                red: 200,
                green: 99,
                blue: 42
            },
            colorFinish: {
                red: 255,
                green: 99,
                blue: 32
            },
            radiusSpread: 0.01,
            radiusStart: 0.02,
            radiusEnd: 0.001,
            particleRadius: 0.05,
            radiusFinish: 0.0,
            emitOrientation: myOrientation,
            emitSpeed: 0.3,
            speedSpread: 0.1,
            alphaStart: 0.05,
            alpha: 0.1,
            alphaFinish: 0.05,
            emitDimensions: {
                x: 1,
                y: 1,
                z: 0.1
            },
            polarFinish: 0.1,
            emitAcceleration: {
                x: 0.0,
                y: 0.0,
                z: 0.0
            },
            accelerationSpread: {
                x: 0.1,
                y: 0.01,
                z: 0.1
            },
            lifespan: 1,
});



function update(deltaTime) {
    totalTime += deltaTime
    var intensity = (minLightIntensity + (maxLightIntensity/4 +  (Math.sin(totalTime) * maxLightIntensity/4)));
    intensity += randFloat(-.3, 0.3);
    print(intensity)
    Entities.editEntity(light, {
        intensity: intensity
    })
}

function cleanup() {
   Entities.deleteEntity(fire);
}
Script.scriptEnding.connect(cleanup);
// Script.update.connect(update);

function randFloat(min, max) {
    return Math.random() * (max - min) + min;
}

function randInt(min, max) {
    return Math.floor(Math.random() * (max - min)) + min;
}