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Add fuzz parameter to reflective material

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This commit is contained in:
Camden Dixie O'Brien
2025-09-22 16:13:55 +01:00
parent 524f8ad085
commit 157bf8d93e
3 changed files with 12 additions and 6 deletions
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9
src/material.c
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@@ -34,10 +34,15 @@ bool scatter_reflective(
material_params_t params, hit_t hit, rng_t *rng, ray_t *ray,
vec3_t *atten_out)
{
(void)rng;
vec3_t reflected = reflect(ray->dir, hit.normal);
if (params.reflective.fuzz != 0.0) {
const double weight = params.reflective.fuzz * rng_canon(rng);
const vec3_t scatter = vec3_scale(rng_vec3(rng), weight);
reflected = vec3_unit(vec3_add(reflected, scatter));
}
ray->orig = hit.point;
ray->dir = reflect(ray->dir, hit.normal);
ray->dir = reflected;
*atten_out = params.reflective.tint;
return true;
}