playcanvas

Version:

PlayCanvas WebGL game engine

12 lines (10 loc) • 534 B

JavaScript

var particle_stretchVS = `
	let moveDir: vec3f = inVel * uniform.stretch;
	var posPrev: vec3f = particlePos - moveDir;
	posPrev = posPrev + particlePosMoved;
	let viewRotationTemp: mat3x3f = mat3x3f(uniform.matrix_view[0].xyz, uniform.matrix_view[1].xyz, uniform.matrix_view[2].xyz);
	let centerToVertexV: vec2f = normalize((viewRotationTemp * localPos).xy);
	let interpolation: f32 = dot(-velocityV, centerToVertexV) * 0.5 + 0.5;
	particlePos = mix(particlePos, posPrev, interpolation);
`;

export { particle_stretchVS as default };