playcanvas/build/playcanvas/src/scene/shader-lib/wgsl/chunks/lit/frag/cubeMapProject.js

PlayCanvas WebGL game engine

var cubeMapProjectPS = `
#if LIT_CUBEMAP_PROJECTION == BOX
	uniform envBoxMin: vec3f;
	uniform envBoxMax: vec3f;
#endif
fn cubeMapProject(nrdir: vec3f) -> vec3f {
	#if LIT_CUBEMAP_PROJECTION == NONE
		return cubeMapRotate(nrdir);
	#endif
	#if LIT_CUBEMAP_PROJECTION == BOX
		let nrdir_rotated: vec3f = cubeMapRotate(nrdir);
		let rbmax: vec3f = (uniform.envBoxMax - vPositionW) / nrdir_rotated;
		let rbmin: vec3f = (uniform.envBoxMin - vPositionW) / nrdir_rotated;
		let rbminmax: vec3f = select(rbmin, rbmax, nrdir_rotated > vec3f(0.0));
		let fa: f32 = min(min(rbminmax.x, rbminmax.y), rbminmax.z);
		let posonbox: vec3f = vPositionW + nrdir_rotated * fa;
		let envBoxPos: vec3f = (uniform.envBoxMin + uniform.envBoxMax) * 0.5;
		return normalize(posonbox - envBoxPos);
	#endif
}
`;

export { cubeMapProjectPS as default };