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This commit is contained in:
Mathias Agopian
2024-10-15 10:23:14 -07:00
parent 73e6ccad96
commit dcf51ba20e
1 changed files with 9 additions and 5 deletions
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14
tools/rainbowgen/src/RainbowGenerator.cpp
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@@ -56,11 +56,11 @@ void RainbowGenerator::build(JobSystem& js) {
std::vector<float3> rainbow(angleCount, float3{});
// The sun appears as about half a degree in the sky
std::default_random_engine rng{ std::random_device{}() };
std::uniform_real_distribution<float> dist{ -f::DEG_TO_RAD * 0.25f, f::DEG_TO_RAD * 0.25f };
std::default_random_engine const rng{ std::random_device{}() };
std::uniform_real_distribution<float> const dist{ -f::DEG_TO_RAD * 0.25f, f::DEG_TO_RAD * 0.25f };
size_t count = 16384;
float const s = f::PI * float(angleCount) / ((maxDeviation - minDeviation) * count);
float const s = 2.0f * float(angleCount) / ((maxDeviation - minDeviation) * count * CIE_XYZ_COUNT);
for (size_t i = 0; i < count; i++) {
float const impact = (float(i) / count) * 2.0f - 1.0f;
@@ -83,7 +83,7 @@ void RainbowGenerator::build(JobSystem& js) {
((phi - minDeviation) / (maxDeviation - minDeviation)) * angleCount);
if (index < angleCount) {
float const T = (1 - F) * std::pow(1 - F, internalBounces) * F;
rainbow[index] += CIE_XYZ[j] * (T * s / 118.518f);
rainbow[index] += (T * s) * (CIE_XYZ[j] / 118.518f);
}
}
}
@@ -101,12 +101,16 @@ void RainbowGenerator::build(JobSystem& js) {
float3 c;
if (i == 3) {
c = rainbow[index];
auto d = c;
d = linear_to_sRGB(XYZ_to_sRGB(d));
if (y == 0) std::cout << d.r << ", " << d.g << ", " << d.b << std::endl;
// if (y == 0) std::cout << d.r << std::endl;
} else {
c = float3{ i == 0, i == 1, i == 2 } * rainbow[index][i];
}
c = XYZ_to_sRGB(c);
c = linear_to_sRGB(c);// * sun*0.5 + sky*0.5);
c = linear_to_sRGB(c) * 56;// * sun*0.5 + sky*0.5);
uint3 const rgb = uint3(saturate(c) * 255);
tga_set_pixel(image, index, y+i*16, {
.b = (uint8_t)rgb.v[2],