drewcassidy/nvidia-texture-tools
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Add normal diff option for normal maps.

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Start dds assembling tool.
This commit is contained in:
castano
2007-10-25 08:49:23 +00:00
parent 645eda8fd4
commit 51bd1bd12f
3 changed files with 164 additions and 10 deletions
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30
src/nvtt/tools/imgdiff.cpp
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@ -90,10 +90,10 @@ struct Error
void print()
{
printf("Mean absolute error: %f\n", mabse);
printf("Max absolute error: %f\n", maxabse);
printf("Root mean squared error: %f\n", rmse);
printf("Peak signal to noise ratio in dB: %f\n", psnr);
printf(" Mean absolute error: %f\n", mabse);
printf(" Max absolute error: %f\n", maxabse);
printf(" Root mean squared error: %f\n", rmse);
printf(" Peak signal to noise ratio in dB: %f\n", psnr);
}
int samples;
@ -109,7 +109,8 @@ struct NormalError
NormalError()
{
samples = 0;
ade = 0;
ade = 0.0f;
mse = 0.0f;
}
void addSample(nv::Color32 o, nv::Color32 c)
@ -117,26 +118,36 @@ struct NormalError
nv::Vector3 vo = nv::Vector3(o.r, o.g, o.b);
nv::Vector3 vc = nv::Vector3(c.r, c.g, c.b);
vo = nv::normalize(2 * (vo / 255.0f) - 1);
vc = nv::normalize(2 * (vc / 255.0f) - 1);
// Unpack and normalize.
vo = nv::normalize(2.0f * (vo / 255.0f) - 1.0f);
vc = nv::normalize(2.0f * (vc / 255.0f) - 1.0f);
ade += acosf(nv::clamp(dot(vo, vc), -1.0f, 1.0f));
mse += length_squared((vo - vc) * (255 / 2.0f));
samples++;
}
void done()
{
ade /= samples;
mse /= samples * 3;
rmse = sqrt(mse);
psnr = (rmse == 0) ? 999.0f : 20.0f * log10(255.0 / rmse);
}
void print()
{
printf("Angular deviation error: %f\n", ade);
printf(" Angular deviation error: %f\n", ade);
printf(" Root mean squared error: %f\n", rmse);
printf(" Peak signal to noise ratio in dB: %f\n", psnr);
}
int samples;
float ade;
float mse;
float rmse;
float psnr;
};
@ -265,6 +276,7 @@ int main(int argc, char *argv[])
if (compareNormal)
{
printf("Normal:\n");
error_normal.print();
}