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OpenGL2: Set cubemap mip selection to match output from ggxcc.

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This commit is contained in:
SmileTheory 2016-06-08 03:36:15 -07:00
parent e0b2256043
commit a40588c8b9
2 changed files with 17 additions and 3 deletions
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6
code/renderergl2/glsl/lightall_fp.glsl
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@ -370,11 +370,11 @@ void main()
// from http://seblagarde.wordpress.com/2012/09/29/image-based-lighting-approaches-and-parallax-corrected-cubemap/
vec3 parallax = u_CubeMapInfo.xyz + u_CubeMapInfo.w * viewDir;
vec3 cubeLightColor = textureCubeLod(u_CubeMap, R + parallax, 7.0 * roughness).rgb * u_EnableTextures.w;
vec3 cubeLightColor = textureCubeLod(u_CubeMap, R + parallax, ROUGHNESS_MIPS * roughness).rgb * u_EnableTextures.w;
// normalize cubemap based on lowest mip (~diffuse)
// normalize cubemap based on last roughness mip (~diffuse)
// multiplying cubemap values by lighting below depends on either this or the cubemap being normalized at generation
//vec3 cubeLightDiffuse = max(textureCubeLod(u_CubeMap, N, 6.0).rgb, 0.5 / 255.0);
//vec3 cubeLightDiffuse = max(textureCubeLod(u_CubeMap, N, ROUGHNESS_MIPS).rgb, 0.5 / 255.0);
//cubeLightColor /= dot(cubeLightDiffuse, vec3(0.2125, 0.7154, 0.0721));
#if defined(USE_PBR)

14
code/renderergl2/tr_glsl.c
View file

@ -325,6 +325,20 @@ static void GLSL_GetShaderHeader( GLenum shaderType, const GLcharARB *extra, cha
if (r_pbr->integer)
Q_strcat(dest, size, "#define USE_PBR\n");
if (r_cubeMapping->integer)
{
int cubeMipSize = r_cubemapSize->integer;
int numRoughnessMips = 0;
while (cubeMipSize)
{
cubeMipSize >>= 1;
numRoughnessMips++;
}
numRoughnessMips = MAX(1, numRoughnessMips - 2);
Q_strcat(dest, size, va("#define ROUGHNESS_MIPS float(%d)\n", numRoughnessMips));
}
if (extra)
{
Q_strcat(dest, size, extra);