playcanvas/build/playcanvas.dbg/src/scene/shader-lib/glsl/chunks/lit/frag/falloffInvSquared.js

Open-source WebGL/WebGPU 3D engine for the web

var falloffInvSquared_default = (
  /* glsl */
  `
float getFalloffWindow(float lightRadius, vec3 lightDir) {
    float sqrDist = dot(lightDir, lightDir);
    float invRadius = 1.0 / lightRadius;
    return square(saturate(1.0 - square(sqrDist * square(invRadius))));
}

float getFalloffInvSquared(float lightRadius, vec3 lightDir) {
    float sqrDist = dot(lightDir, lightDir);
    float falloff = 1.0 / (sqrDist + 1.0);
    float invRadius = 1.0 / lightRadius;

    falloff *= 16.0;
    falloff *= square(saturate(1.0 - square(sqrDist * square(invRadius))));

    return falloff;
}
`
);
export {
  falloffInvSquared_default as default
};