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xash3d-fwgs
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rtx: improve barycentric triangle sampling 

, #265
This commit is contained in:
Ivan Avdeev 2021-12-08 12:35:49 -08:00
parent 6e9b54869c
commit f59fadec51
1 changed files with 3 additions and 2 deletions
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5
ref_vk/shaders/ray.rgen
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@ -144,8 +144,9 @@ void sampleSurfaceTriangle(
const vec3 v3 = (emissive_transform * vec4(vertices[vi3].pos, 1.)).xyz;
// TODO projected uniform sampling
vec2 bary = vec2(rand01(), rand01());
bary.y *= (1. - bary.x);
vec2 bary = vec2(sqrt(rand01()), rand01());
bary.y *= bary.x;
bary.x = 1. - bary.x;
const vec3 sample_pos = baryMix(v1, v2, v3, bary);
vec3 light_dir = sample_pos - payload_opaque.hit_pos_t.xyz;