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- add --multisample argument for tracing multiple times per texel

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This commit is contained in:
Magnus Norddahl 2018-10-30 14:33:16 +01:00
parent 453a4cc8b1
commit 4fd952e7bb
2 changed files with 38 additions and 7 deletions
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36
src/lightmap/lightmap.cpp
View file

@ -42,6 +42,8 @@
#include <map>
#include <vector>
extern int Multisample;
const kexVec3 kexLightmapBuilder::gridSize(64, 64, 128);
//
@ -474,19 +476,38 @@ void kexLightmapBuilder::TraceSurface(surface_t *surface)
normal = surface->plane.Normal();
int multisampleCount = Multisample;
// start walking through each texel
for(i = 0; i < sampleHeight; i++)
{
for(j = 0; j < sampleWidth; j++)
{
// convert the texel into world-space coordinates.
// this will be the origin in which a line will be traced from
pos = surface->lightmapOrigin + normal +
(surface->lightmapSteps[0] * (float)j) +
(surface->lightmapSteps[1] * (float)i);
kexVec3 c(0.0f, 0.0f, 0.0f);
kexVec3 c = LightTexelSample(trace, pos, surface);
kexMath::Clamp(c, 0, 1);
for (int k = 0; k < multisampleCount; k++)
{
kexVec2 multisamplePos((float)j, (float)i);
if (k > 0)
{
multisamplePos.x += rand() / (float)RAND_MAX - 0.5f;
multisamplePos.y += rand() / (float)RAND_MAX - 0.5f;
multisamplePos.x = max(multisamplePos.x, 0.0f);
multisamplePos.y = max(multisamplePos.y, 0.0f);
multisamplePos.x = min(multisamplePos.x, (float)sampleWidth);
multisamplePos.y = min(multisamplePos.y, (float)sampleHeight);
}
// convert the texel into world-space coordinates.
// this will be the origin in which a line will be traced from
pos = surface->lightmapOrigin + normal +
(surface->lightmapSteps[0] * multisamplePos.x) +
(surface->lightmapSteps[1] * multisamplePos.y);
c += LightTexelSample(trace, pos, surface);
}
c /= multisampleCount;
// if nothing at all was traced and color is completely black
// then this surface will not go through the extra rendering
@ -496,6 +517,7 @@ void kexLightmapBuilder::TraceSurface(surface_t *surface)
bShouldLookupTexture = true;
}
kexMath::Clamp(c, 0, 1);
colorSamples[i * 1024 + j] = c;
}
}

9
src/main.cpp
View file

@ -117,6 +117,7 @@ int SSELevel;
int NumThreads = 0;
int LMDims = LIGHTMAP_MAX_SIZE;
int Samples = 8;
int Multisample = 1;
// PRIVATE DATA DEFINITIONS ------------------------------------------------
@ -155,6 +156,7 @@ static option long_opts[] =
{"threads", required_argument, 0, 'j'},
{"samples", required_argument, 0, 'Q'},
{"size", required_argument, 0, 'S'},
{"multisample", required_argument, 0, 'M'},
{0,0,0,0}
};
@ -448,6 +450,11 @@ static void ParseArgs(int argc, char **argv)
if (LMDims > LIGHTMAP_MAX_SIZE) LMDims = LIGHTMAP_MAX_SIZE;
LMDims = kexMath::RoundPowerOfTwo(LMDims);
break;
case 'M':
Multisample = atoi(optarg);
if (Multisample <= 0) Multisample = 1;
if (Multisample > 64) Multisample = 64;
break;
case 1000:
ShowUsage();
exit(0);
@ -493,6 +500,7 @@ static void ShowUsage()
" slow compile time) must be in powers of two\n"
" -S, --size=NNN lightmap texture dimensions for width and height\n"
" must be in powers of two (1, 2, 4, 8, 16, etc)\n"
" -M, --multisample=NNN Number of samples to use per texel (default %d)\n"
#ifdef _WIN32
" -v, --view View the nodes\n"
#endif
@ -509,6 +517,7 @@ static void ShowUsage()
, SplitCost
, AAPreference
, (int)std::thread::hardware_concurrency()
, Multisample
);
}