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Added samples per pixel gui param

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Martin Opat
2025-01-15 20:03:39 +01:00
parent 91c9aa193c
commit 2c6594244e
5 changed files with 21 additions and 14 deletions
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22
src/illumination/Raycaster.cu
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@@ -20,14 +20,14 @@ __global__ void raycastKernel(float* volumeData, FrameBuffer framebuffer, const
float accumR = 0.0f;
float accumG = 0.0f;
float accumB = 0.0f;
float accumA = 1.0f * (float)SAMPLES_PER_PIXEL;
float accumA = 1.0f * (float)d_samplesPerPixel;
// Initialize random state for ray scattering
curandState randState;
curand_init(1234, px + py * width, 0, &randState);
// Multiple samples per pixel
for (int s = 0; s < SAMPLES_PER_PIXEL; s++) {
for (int s = 0; s < d_samplesPerPixel; s++) {
// Map to [-1, 1]
float jitterU = (curand_uniform(&randState) - 0.5f) / width;
float jitterV = (curand_uniform(&randState) - 0.5f) / height;
@@ -71,11 +71,11 @@ __global__ void raycastKernel(float* volumeData, FrameBuffer framebuffer, const
intersectAxis(d_cameraPos.z, rayDir.z, 0.0f, (float)VOLUME_DEPTH);
if (tNear > tFar) {
// No intersection -> Set to brackground color (multiply by SAMPLES_PER_PIXEL because we divide by it later)
accumR = d_backgroundColor.x * (float)SAMPLES_PER_PIXEL;
accumG = d_backgroundColor.y * (float)SAMPLES_PER_PIXEL;
accumB = d_backgroundColor.z * (float)SAMPLES_PER_PIXEL;
accumA = 1.0f * (float)SAMPLES_PER_PIXEL;
// No intersection -> Set to brackground color (multiply by d_samplesPerPixel because we divide by it later)
accumR = d_backgroundColor.x * (float)d_samplesPerPixel;
accumG = d_backgroundColor.y * (float)d_samplesPerPixel;
accumB = d_backgroundColor.z * (float)d_samplesPerPixel;
accumA = 1.0f * (float)d_samplesPerPixel;
} else {
if (tNear < 0.0f) tNear = 0.0f;
@@ -130,10 +130,10 @@ __global__ void raycastKernel(float* volumeData, FrameBuffer framebuffer, const
// Average samples
accumR /= (float)SAMPLES_PER_PIXEL;
accumG /= (float)SAMPLES_PER_PIXEL;
accumB /= (float)SAMPLES_PER_PIXEL;
accumA /= (float)SAMPLES_PER_PIXEL;
accumR /= (float)d_samplesPerPixel;
accumG /= (float)d_samplesPerPixel;
accumB /= (float)d_samplesPerPixel;
accumA /= (float)d_samplesPerPixel;
// Final colour
framebuffer.writePixel(px, py, accumR, accumG, accumB, accumA);