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Code Issues 156 Wiki Activity

Add sky light, physical atmosphere, auto exposure and bloom to the GL 4.6 renderer

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Hirek
2026-10-15 22:16:41 +02:00
parent ea0dba6dae
commit ce725c3d62
37 changed files with 2342 additions and 32 deletions
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24
shaders/envmapping.glsl
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@@ -1,5 +1,7 @@
#if ENVMAP_ENABLED
uniform samplerCube envmap;
// the same map prefiltered with the GGX lobe (envmap_prefilter.comp), used when env_ggx is 1
uniform samplerCube envmap_ggx;
#endif
vec3 envmap_color( vec3 normal )
@@ -39,3 +41,25 @@ vec3 envmap_color_lod(vec3 fragnormal, float lod)
return vec3(0.5); // was vec3(0.0), match the non-LOD fallback
#endif
}
// reflection of the surroundings in a surface of the given perceptual roughness (0 mirror, 1 matte)
vec3 envmap_color_rough(vec3 fragnormal, float roughness)
{
// the plain map, its mipmaps (box filtered) standing for the roughness
const float MAX_REFLECTION_LOD = 8.0;
vec3 boxcolor = envmap_color_lod(fragnormal, roughness * MAX_REFLECTION_LOD);
#if ENVMAP_ENABLED
if (env_ggx == 0U || roughness <= ENVMAP_GGX_ROUGHNESS_MIN)
return boxcolor;
vec3 refvec = reflect(f_pos.xyz, fragnormal);
refvec = vec3(inv_view * vec4(refvec, 0.0));
float level = (roughness - ENVMAP_GGX_ROUGHNESS_MIN) / (1.0 - ENVMAP_GGX_ROUGHNESS_MIN) * float(ENVMAP_GGX_LEVELS - 1U);
vec3 ggxcolor = textureLod(envmap_ggx, refvec, level).rgb;
if (any(isnan(ggxcolor)) || any(isinf(ggxcolor))) ggxcolor = vec3(0.0);
ggxcolor = max(ggxcolor, vec3(0.0));
// the prefiltered map takes over over the first tenth of the roughness above its lowest level
return mix(boxcolor, ggxcolor, clamp((roughness - ENVMAP_GGX_ROUGHNESS_MIN) * 10.0, 0.0, 1.0));
#else
return boxcolor;
#endif
}