playcanvas
Version:
Open-source WebGL/WebGPU 3D engine for the web
15 lines (14 loc) • 415 B
JavaScript
var spherical_default = `
fn toSpherical(dir: vec3f) -> vec2f {
let angle_xz = select(0.0, atan2(dir.x, dir.z), any(dir.xz != vec2f(0.0)));
return vec2f(angle_xz, asin(dir.y));
}
fn toSphericalUv(dir : vec3f) -> vec2f {
const PI : f32 = 3.141592653589793;
let uv : vec2f = toSpherical(dir) / vec2f(PI * 2.0, PI) + vec2f(0.5, 0.5);
return vec2f(uv.x, 1.0 - uv.y);
}
`;
export {
spherical_default as default
};