yggdrasil75/stupidsimcpp
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some fixes, also changed from doubles to floats to save memory for sake of cache optimization

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yggdrasil75
2026-01-20 18:17:35 -05:00
parent c52c6b14b9
commit a4e378bbcd
2 changed files with 24 additions and 26 deletions
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2
tests/g3test2.cpp
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@@ -730,7 +730,7 @@ int main() {
ImGui::Separator();
ImGui::Text("Sphere Color:");
float color[3] = {sphereConfig.r, sphereConfig.g, sphereConfig.b};
float color[3] = {sphereConfig.r / 255, sphereConfig.g / 255, sphereConfig.b / 255};
if (ImGui::ColorEdit3("Color", color)) {
sphereConfig.r = static_cast<uint8_t>(color[0] * 255);
sphereConfig.g = static_cast<uint8_t>(color[1] * 255);

46
util/grid/grid3.hpp
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@@ -153,7 +153,6 @@ private:
}
public:
double binSize = 1;
VoxelGrid() : gridSize(0,0,0) {
std::cout << "creating empty grid." << std::endl;
}
@@ -251,19 +250,19 @@ public:
return (voxl >= 0 && voxl.x < gridSize.x && voxl.y < gridSize.y && voxl.z < gridSize.z);
}
void voxelTraverse(const Vec3d& origin, const Vec3d& end, Voxel& outVoxel, int maxDist = 10000000) const {
Vec3i cv = (origin / binSize).floorToI();
Vec3i lv = (end / binSize).floorToI();
Vec3d ray = end - origin;
Vec3f step = Vec3f(ray.x >= 0 ? 1 : -1, ray.y >= 0 ? 1 : -1, ray.z >= 0 ? 1 : -1);
Vec3d nextVox = cv.toDouble() + step * binSize;
void voxelTraverse(const Vec3f& origin, const Vec3f& end, Voxel& outVoxel, int maxDist = 10000000) const {
Vec3i cv = origin.floorToI();
Vec3i lv = end.floorToI();
Vec3f ray = end - origin;
Vec3i step = Vec3i(ray.x >= 0 ? 1 : -1, ray.y >= 0 ? 1 : -1, ray.z >= 0 ? 1 : -1);
Vec3i nextVox = cv + step;
Vec3d tMax = Vec3d(ray.x != 0 ? (nextVox.x - origin.x) / ray.x : INF,
Vec3f tMax = Vec3f(ray.x != 0 ? (nextVox.x - origin.x) / ray.x : INF,
ray.y != 0 ? (nextVox.y - origin.y) / ray.y : INF,
ray.z != 0 ? (nextVox.z - origin.z) / ray.z : INF);
Vec3d tDelta = Vec3d(ray.x != 0 ? binSize / ray.x * step.x : INF,
ray.y != 0 ? binSize / ray.y * step.y : INF,
ray.z != 0 ? binSize / ray.z * step.z : INF);
Vec3f tDelta = Vec3f(ray.x != 0 ? 1 / ray.x * static_cast<float>(step.x) : INF,
ray.y != 0 ? 1 / ray.y * static_cast<float>(step.y) : INF,
ray.z != 0 ? 1 / ray.z * static_cast<float>(step.z) : INF);
float dist = 0;
outVoxel.alpha = 0.0;
@@ -324,25 +323,24 @@ public:
TIME_FUNCTION;
Vec3f forward = cam.forward();
Vec3f right = cam.right();
Vec3f upCor = right.cross(forward).normalized();
//Vec3f upCor = right.cross(forward).normalized();
float aspect = resolution.aspect();
float fovRad = cam.fovRad();
float viewH = 2 * tan(fovRad / 2);
float viewH = tan(cam.fov / 2.f);
float viewW = viewH * aspect;
float maxDist = std::sqrt(gridSize.lengthSquared()) * binSize;
frame outFrame(resolution.x, resolution.y, frame::colormap::RGB);
float maxDist = std::sqrt(gridSize.lengthSquared());
frame outFrame(resolution.x, resolution.y, colorformat);
std::vector<uint8_t> colorBuffer(resolution.x * resolution.y * 3);
#pragma omp parallel for
for (int x = 0; x < resolution.x; x++) {
float v = (2.0 * (x + 0.5f) / resolution.y - 1.f) * viewH;
for (int y = 0; y < resolution.y; y++) {
float v = (1.f - 2.f * (y+0.5f) / resolution.y) * viewH;
for (int x = 0; x < resolution.x; x++) {
Voxel outVoxel(0,false,0.f,Vec3ui8(10, 10, 255));
float u = (1.f - 2.f * (y + 0.5f) / resolution.x) * viewW;
Vec3f rayDirWorld = (forward + right * v + upCor * u).normalized();
Vec3f rayEnd = cam.posfor.origin + rayDirWorld * maxDist;
Vec3d rayStartGrid = cam.posfor.origin.toDouble() / binSize;
Vec3d rayEndGrid = rayEnd.toDouble() / binSize;
voxelTraverse(rayStartGrid, rayEndGrid, outVoxel);
float u = (2.f * (x+0.5f)/resolution.x - 1.f) * viewW;
Vec3f rayDirWorld = (forward + right * u + cam.up * v).normalized();
Vec3f rayStartGrid = cam.posfor.origin;
Vec3f rayEnd = rayStartGrid + rayDirWorld * maxDist;
voxelTraverse(rayStartGrid, rayEnd, outVoxel, maxDist);
Vec3ui8 hitColor = outVoxel.color;
// Set pixel color in buffer
switch (colorformat) {
@@ -457,7 +455,7 @@ public:
break;
}
}
size_t cbsize = gridSize.x * gridSize.y * colors;
int cbsize = gridSize.x * gridSize.y * colors;
for (int layer = 0; layer < getDepth(); layer++) {
int layerMult = layer * gridSize.x * gridSize.y;
frame layerFrame(gridSize.x, gridSize.y, colorFormat);