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Discard CPU sun traces via normal dot product test

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This commit is contained in:
RaveYard 2022-07-03 23:06:40 +02:00
parent ff4d4fe56d
commit 3a53ffeca9
1 changed files with 18 additions and 14 deletions
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32
src/lightmap/cpuraytracer.cpp
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@ -230,22 +230,26 @@ void CPURaytracer::RunLightTrace(CPUTraceState& state)
float attenuation = 0.0f;
if (state.PassType == 0 && surface)
{
vec3 e0 = normalize(cross(normal, std::abs(normal.x) < std::abs(normal.y) ? vec3(1.0f, 0.0f, 0.0f) : vec3(0.0f, 1.0f, 0.0f)));
vec3 e1 = cross(normal, e0);
e0 = cross(normal, e1);
for (uint32_t i = 0; i < state.SampleCount; i++)
if (dot(normal, state.SunDir) > 0.0f)
{
vec2 offset = (Hammersley(i, state.SampleCount) - 0.5f) * float(surface->sampleDimension);
vec3 origin2 = origin + e0 * offset.x + e1 * offset.y;
vec3 e0 = normalize(cross(normal, std::abs(normal.x) < std::abs(normal.y) ? vec3(1.0f, 0.0f, 0.0f) : vec3(0.0f, 1.0f, 0.0f)));
vec3 e1 = cross(normal, e0);
e0 = cross(normal, e1);
vec3 start = origin2;
vec3 end = start + state.SunDir * dist;
LevelTraceHit hit = Trace(start, end);
if (hit.fraction < 1.0f && hit.hitSurface->bSky)
attenuation += 1.0f;
for (uint32_t i = 0; i < state.SampleCount; i++)
{
vec2 offset = (Hammersley(i, state.SampleCount) - 0.5f) * float(surface->sampleDimension);
vec3 origin2 = origin + e0 * offset.x + e1 * offset.y;
vec3 start = origin2;
vec3 end = start + state.SunDir * dist;
LevelTraceHit hit = Trace(start, end);
if (hit.fraction < 1.0f && hit.hitSurface->bSky)
attenuation += 1.0f;
}
attenuation *= 1.0f / float(state.SampleCount);
incoming += state.SunColor * (attenuation * state.SunIntensity * incomingAttenuation);
}
attenuation *= 1.0f / float(state.SampleCount);
}
else
{
@ -253,8 +257,8 @@ void CPURaytracer::RunLightTrace(CPUTraceState& state)
vec3 end = start + state.SunDir * dist;
LevelTraceHit hit = Trace(start, end);
attenuation = (hit.fraction < 1.0f && hit.hitSurface->bSky) ? 1.0f : 0.0f;
incoming += state.SunColor * (attenuation * state.SunIntensity * incomingAttenuation);
}
incoming += state.SunColor * (attenuation * state.SunIntensity * incomingAttenuation);
}
for (uint32_t j = 0; j < state.LightCount; j++)