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gfx: tweak sphere_to_polar

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Dominik Madarász 2024-03-27 20:21:52 +01:00
parent ff72ac6bc9
commit 989a86fb1a
1 changed files with 2 additions and 3 deletions
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5
engine/art/shaders/fs_32_4_model.glsl
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@ -224,10 +224,9 @@ float geometry_smith( vec3 N, vec3 V, vec3 L, float roughness )
return geometry_schlick_ggx( N, V, k ) * geometry_schlick_ggx( N, L, k ); return geometry_schlick_ggx( N, V, k ) * geometry_schlick_ggx( N, L, k );
} }
vec2 sphere_to_polar( vec3 normal ) vec2 sphere_to_polar( vec3 normal ) {
{
normal = normalize( normal ); normal = normalize( normal );
return vec2( ( atan( normal.z, normal.x ) - PI*0.5f ) / PI / 2.0 + 0.5, acos( normal.y ) / PI ); return vec2( 1-atan( normal.z, normal.x ) / PI + 0.5 , acos( normal.y ) / PI );
} }
// Our vertically GL_CLAMPed textures seem to blend towards black when sampling the half-pixel edge. // Our vertically GL_CLAMPed textures seem to blend towards black when sampling the half-pixel edge.