playcanvas
Version:
PlayCanvas WebGL game engine
13 lines (11 loc) • 323 B
JavaScript
var sphericalPS = `
vec2 toSpherical(vec3 dir) {
return vec2(dir.xz == vec2(0.0) ? 0.0 : atan(dir.x, dir.z), asin(dir.y));
}
vec2 toSphericalUv(vec3 dir) {
const float PI = 3.141592653589793;
vec2 uv = toSpherical(dir) / vec2(PI * 2.0, PI) + 0.5;
return vec2(uv.x, 1.0 - uv.y);
}
`;
export { sphericalPS as default };