playcanvas

Version:
PlayCanvas WebGL game engine
21 lines (19 loc) • 804 B
JavaScript
var particleUpdaterSpherePS = `
uniform spawnBoundsSphere: f32;
uniform spawnBoundsSphereInnerRatio: f32;
fn calcSpawnPosition(inBounds: vec3f, rndFactor: f32) -> vec3f {
	let rnd4: f32 = fract(rndFactor * 1000.0);
	let norm: vec3f = normalize(inBounds.xyz - vec3f(0.5));
	let r: f32 = rnd4 * (1.0 - uniform.spawnBoundsSphereInnerRatio) + uniform.spawnBoundsSphereInnerRatio;
	#ifndef LOCAL_SPACE
		return uniform.emitterPos + norm * r * uniform.spawnBoundsSphere;
	#else
		return norm * r * uniform.spawnBoundsSphere;
	#endif
}
fn addInitialVelocity(localVelocity: ptr<function, vec3f>, inBounds: vec3f) {
	let initialVelOffset: vec3f = normalize(inBounds - vec3f(0.5)) * uniform.initialVelocity;
	*localVelocity = *localVelocity + initialVelOffset;
}
`;

export { particleUpdaterSpherePS as default };