- is a GPU particle system for threejs using mesh instances inspired by unity shuriken
features
- pointClouds,childParticles,vertex distortion/morphtargets,forceField,noise
- autosimulation for graphity,force and to set Attributes OverLifeTime
Usage
- ue need to use update() and updateSimulation() to make changes present in runtime!
- import the script
import {Particles } from './ji-GPU-Particles'; - initialize the PS object with
const particle = new Particles()u dont need to pass in any values yet! we`re just referencing an object for later usage. - if your THREEjs scene is ready and referenced, you can initialize your PS now by calling InitializeParticles() on the object we just created. for a minimal setup pass in the scene, prototype-Mesh and maxAmount like this:
particle.InitializeParticles(scene,Mesh,100000). you can set every value and attribute later in runtime. - now its time to add some crazy stuff:
particle.setSpawnOverTime(true);
particle.setMaxLifeTime(1);
particle.setAttributeOverLifeTime("color",[10,1,0]);
particle.setAttributeOverLifeTime("emission",[10,0,0]);
particle.setAttributeOverLifeTime("force",[,20,50]);
particle.setForce([0,150,0]);
particle.setAttributeOverLifeTime("transform",[-100,-100,2]);
particle.setSpawnFrequency(0);
particle.setMaxSpawnCount(100000);
particle.setSpawnOverTime(true);
particle.setNoise(20000);
const geo = new THREE.SphereGeometry(2000,30,30);
particle.setStartPositionFromGeometry(false,geo,10);
- now we have set some values, we can update and simulate them in useFrame():
useFrame((state, delta) => {
particle.updateSimulation(delta)
particle.updateValues(["transform","color","emission"])
}