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burning: GL_FOG_COORDINATE_SOURCE ,GL_FRAGMENT_DEPTH -> abs(EyeSpace.vertex.z)

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git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@6104 dfc29bdd-3216-0410-991c-e03cc46cb475
This commit is contained in:
engineer_apple 2020-03-01 16:19:03 +00:00
parent ae64a8ef22
commit f74abf1d2b
1 changed files with 8 additions and 3 deletions
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11
source/Irrlicht/CSoftwareDriver2.cpp
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@ -1592,16 +1592,21 @@ void CBurningVideoDriver::VertexCache_fill(const u32 sourceIndex, const u32 dest
{
f32 fog_factor = 1.f;
// GL_FRAGMENT_DEPTH -> abs(EyeSpace.vertex.z)
ieee754 fog_frag_coord;
fog_frag_coord.f = EyeSpace.vertex.z;
fog_frag_coord.fields.sign = 0;
switch (FogType)
{
case EFT_FOG_LINEAR:
fog_factor = (FogEnd - EyeSpace.vertex.z) * EyeSpace.fog_scale;
fog_factor = (FogEnd - fog_frag_coord.f) * EyeSpace.fog_scale;
break;
case EFT_FOG_EXP:
fog_factor = (f32)exp(-FogDensity * EyeSpace.vertex.z);
fog_factor = (f32)exp(-FogDensity * fog_frag_coord.f);
break;
case EFT_FOG_EXP2:
fog_factor = (f32)exp(-FogDensity * FogDensity * EyeSpace.vertex.z * EyeSpace.vertex.z);
fog_factor = (f32)exp(-FogDensity * FogDensity * fog_frag_coord.f * fog_frag_coord.f);
break;
}