//
// particlesTest.js
// examples/example/entities
//
// Created by David Rowe on 2 Sep 2015.
// Copyright 2015 High Fidelity, Inc.
//
// Click on the box entity to display different particle effects.
//
// Distributed under the Apache License, Version 2.0.
// See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
//
(function () {
var box,
sphere,
sphereDimensions = { x: 0.4, y: 0.8, z: 0.2 },
pointDimensions = { x: 0.0, y: 0.0, z: 0.0 },
sphereOrientation = Quat.fromPitchYawRollDegrees(-60.0, 30.0, 0.0),
verticalOrientation = Quat.fromPitchYawRollDegrees(-90.0, 0.0, 0.0),
particles,
particleExample = -1,
PARTICLE_RADIUS = 0.04,
SLOW_EMIT_RATE = 2.0,
HALF_EMIT_RATE = 50.0,
FAST_EMIT_RATE = 100.0,
SLOW_EMIT_SPEED = 0.025,
FAST_EMIT_SPEED = 1.0,
GRAVITY_EMIT_ACCELERATON = { x: 0.0, y: -0.3, z: 0.0 },
ZERO_EMIT_ACCELERATON = { x: 0.0, y: 0.0, z: 0.0 },
PI = 3.141592,
DEG_TO_RAD = PI / 180.0,
NUM_PARTICLE_EXAMPLES = 18;
function onClickDownOnEntity(entityID) {
if (entityID === box || entityID === sphere || entityID === particles) {
particleExample = (particleExample + 1) % NUM_PARTICLE_EXAMPLES;
switch (particleExample) {
case 0:
print("Simple emitter");
Entities.editEntity(particles, {
speedSpread: 0.0,
accelerationSpread: { x: 0.0, y: 0.0, z: 0.0 },
radiusSpread: 0.0,
isEmitting: true
});
break;
case 1:
print("Speed spread");
Entities.editEntity(particles, {
speedSpread: 0.1
});
break;
case 2:
print("Acceleration spread");
Entities.editEntity(particles, {
speedSpread: 0.0,
accelerationSpread: { x: 0.0, y: 0.1, z: 0.0 }
});
break;
case 3:
print("Radius spread - temporarily not working");
Entities.editEntity(particles, {
accelerationSpread: { x: 0.0, y: 0.0, z: 0.0 },
radiusSpread: 0.035
});
break;
case 4:
print("Radius start and finish");
Entities.editEntity(particles, {
radiusSpread: 0.0,
radiusStart: 0.0,
particleRadius: PARTICLE_RADIUS,
radiusFinish: 0.0
});
break;
case 5:
print("Alpha 0.5");
Entities.editEntity(particles, {
radiusStart: PARTICLE_RADIUS,
particleRadius: PARTICLE_RADIUS,
radiusFinish: PARTICLE_RADIUS,
alpha: 0.5
});
break;
case 6:
print("Alpha spread - temporarily not working");
Entities.editEntity(particles, {
alpha: 0.5,
alphaSpread: 0.5
});
break;
case 7:
print("Alpha start and finish");
Entities.editEntity(particles, {
alphaSpread: 0.0,
alpha: 1.0,
alphaStart: 0.0,
alphaFinish: 0.0
});
break;
case 8:
print("Color spread - temporarily not working");
Entities.editEntity(particles, {
alpha: 1.0,
alphaStart: 1.0,
alphaFinish: 1.0,
color: { red: 128, green: 128, blue: 128 },
colorSpread: { red: 128, green: 0, blue: 0 }
});
break;
case 9:
print("Color start and finish");
Entities.editEntity(particles, {
color: { red: 255, green: 255, blue: 255 },
colorSpread: { red: 0, green: 0, blue: 0 },
colorStart: { red: 255, green: 0, blue: 0 },
colorFinish: { red: 0, green: 255, blue: 0 }
});
break;
case 10:
print("Emit in a spread beam");
Entities.editEntity(particles, {
colorStart: { red: 255, green: 255, blue: 255 },
colorFinish: { red: 255, green: 255, blue: 255 },
alphaFinish: 0.0,
emitRate: FAST_EMIT_RATE,
polarFinish: 2.0 * DEG_TO_RAD
});
break;
case 11:
print("Emit in all directions from point");
Entities.editEntity(particles, {
emitSpeed: SLOW_EMIT_SPEED,
emitAcceleration: ZERO_EMIT_ACCELERATON,
polarFinish: PI
});
break;
case 12:
print("Emit from sphere surface");
Entities.editEntity(particles, {
colorStart: { red: 255, green: 255, blue: 255 },
colorFinish: { red: 255, green: 255, blue: 255 },
emitDimensions: sphereDimensions,
emitOrientation: sphereOrientation
});
Entities.editEntity(box, {
visible: false
});
Entities.editEntity(sphere, {
visible: true
});
break;
case 13:
print("Emit from hemisphere of sphere surface");
Entities.editEntity(particles, {
polarFinish: PI / 2.0
});
break;
case 14:
print("Emit from equator of sphere surface");
Entities.editEntity(particles, {
polarStart: PI / 2.0,
emitRate: HALF_EMIT_RATE
});
break;
case 15:
print("Emit from half equator of sphere surface");
Entities.editEntity(particles, {
azimuthStart: -PI / 2.0,
azimuthFinish: PI / 2.0
});
break;
case 16:
print("Emit within eighth of sphere volume");
Entities.editEntity(particles, {
polarStart: 0.0,
polarFinish: PI / 2.0,
azimuthStart: 0,
azimuthFinish: PI / 2.0,
emitRadiusStart: 0.0,
alphaFinish: 1.0,
emitSpeed: 0.0
});
break;
case 17:
print("Stop emitting");
Entities.editEntity(particles, {
emitDimensions: pointDimensions,
emitOrientation: verticalOrientation,
alphaFinish: 1.0,
emitRate: SLOW_EMIT_RATE,
emitSpeed: FAST_EMIT_SPEED,
emitAcceleration: GRAVITY_EMIT_ACCELERATON,
polarStart: 0.0,
polarFinish: 0.0,
azimuthStart: -PI,
azimuthFinish: PI,
isEmitting: false
});
Entities.editEntity(box, {
visible: true
});
Entities.editEntity(sphere, {
visible: false
});
break;
}
}
}
function setUp() {
var boxPoint,
spawnPoint;
boxPoint = Vec3.sum(MyAvatar.position, Vec3.multiply(4.0, Quat.getFront(Camera.getOrientation())));
boxPoint = Vec3.sum(boxPoint, { x: 0.0, y: -0.5, z: 0.0 });
spawnPoint = Vec3.sum(boxPoint, { x: 0.0, y: 1.0, z: 0.0 });
box = Entities.addEntity({
type: "Box",
name: "ParticlesTest Box",
position: boxPoint,
rotation: verticalOrientation,
dimensions: { x: 0.3, y: 0.3, z: 0.3 },
color: { red: 128, green: 128, blue: 128 },
lifetime: 3600, // 1 hour; just in case
visible: true
});
// Same size and orientation as emitter when ellipsoid.
sphere = Entities.addEntity({
type: "Sphere",
name: "ParticlesTest Sphere",
position: boxPoint,
rotation: sphereOrientation,
dimensions: sphereDimensions,
color: { red: 128, green: 128, blue: 128 },
lifetime: 3600, // 1 hour; just in case
visible: false
});
// 1.0m above the box or ellipsoid.
particles = Entities.addEntity({
type: "ParticleEffect",
name: "ParticlesTest Emitter",
position: spawnPoint,
emitOrientation: verticalOrientation,
particleRadius: PARTICLE_RADIUS,
radiusSpread: 0.0,
emitRate: SLOW_EMIT_RATE,
emitSpeed: FAST_EMIT_SPEED,
speedSpread: 0.0,
emitAcceleration: GRAVITY_EMIT_ACCELERATON,
accelerationSpread: { x: 0.0, y: 0.0, z: 0.0 },
textures: "https://hifi-public.s3.amazonaws.com/alan/Particles/Particle-Sprite-Smoke-1.png",
color: { red: 255, green: 255, blue: 255 },
lifespan: 5.0,
locked: false,
isEmitting: false,
lifetime: 3600 // 1 hour; just in case
});
Entities.clickDownOnEntity.connect(onClickDownOnEntity);
print("Click on the box to cycle through particle examples");
}
function tearDown() {
Entities.clickDownOnEntity.disconnect(onClickDownOnEntity);
Entities.deleteEntity(particles);
Entities.deleteEntity(box);
Entities.deleteEntity(sphere);
}
setUp();
Script.scriptEnding.connect(tearDown);
}());