yggdrasil75/stupidsimcpp
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some improvements

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This commit is contained in:
Yggdrasil75
2026-01-05 10:58:00 -05:00
parent 57e9834772
commit 466fa26dc7
4 changed files with 181 additions and 230 deletions
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68
tests/g3test2.cpp
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@@ -38,7 +38,7 @@ void generateNoiseGrid(VoxelGrid& grid, PNoise2& noise) {
// Apply threshold to make some voxels "active"
// Higher threshold = sparser voxels
float threshold = 0.3f;
float threshold = 0.01;
float active = (noiseVal > threshold) ? noiseVal : 0.0f;
// Create grayscale color based on noise value
@@ -80,7 +80,17 @@ bool renderView(const std::string& filename, VoxelGrid& grid, const Vec3f& posit
return success;
}
// Function to rotate a vector around the Y axis
Vec3f rotateX(const Vec3f& vec, float angle) {
TIME_FUNCTION;
float cosA = cos(angle);
float sinA = sin(angle);
return Vec3f(
vec.x,
vec.y * cosA - vec.z * sinA,
vec.y * sinA + vec.z * cosA
);
}
Vec3f rotateY(const Vec3f& vec, float angle) {
TIME_FUNCTION;
float cosA = cos(angle);
@@ -92,6 +102,17 @@ Vec3f rotateY(const Vec3f& vec, float angle) {
);
}
Vec3f rotateZ(const Vec3f& vec, float angle) {
TIME_FUNCTION;
float cosA = cos(angle);
float sinA = sin(angle);
return Vec3f(
vec.x * cosA - vec.y * sinA,
vec.x * sinA + vec.y * cosA,
vec.z
);
}
int main() {
TIME_FUNCTION;
std::cout << "=== Noise Grid Generator and Renderer ===" << std::endl;
@@ -113,8 +134,7 @@ int main() {
// Camera distance from center (outside the grid)
float cameraDistance = GRID_SIZE * 2.0f;
// Create 180-degree rotation around the Y axis
int numFrames = 2;
int numFrames = 360;
// Base camera position (looking from front)
Vec3f basePosition(0, 0, cameraDistance);
@@ -133,7 +153,45 @@ int main() {
// Create filename with frame number
char filename[256];
snprintf(filename, sizeof(filename), "output/frame_%03d.bmp", i);
snprintf(filename, sizeof(filename), "output/framey_%03d.bmp", i);
std::cout << "Rendering frame " << i << "/" << numFrames
<< " (angle: " << (angle * 360.0f / M_PI) << " degrees)" << std::endl;
renderView(filename, grid, finalPos, rotatedDir, up);
}
for (int i = 0; i <= numFrames; i++) {
float angle = (float)i / numFrames * M_PI; // 0 to π (180 degrees)
// Rotate camera position around Y axis
Vec3f rotatedPos = rotateZ(basePosition, angle);
Vec3f finalPos = gridCenter + rotatedPos;
//Vec3f rotatedDir = rotateY(baseDirection, angle);
Vec3f rotatedDir = (gridCenter - finalPos).normalized();
// Create filename with frame number
char filename[256];
snprintf(filename, sizeof(filename), "output/framez_%03d.bmp", i);
std::cout << "Rendering frame " << i << "/" << numFrames
<< " (angle: " << (angle * 360.0f / M_PI) << " degrees)" << std::endl;
renderView(filename, grid, finalPos, rotatedDir, up);
}
for (int i = 0; i <= numFrames; i++) {
float angle = (float)i / numFrames * M_PI; // 0 to π (180 degrees)
// Rotate camera position around Y axis
Vec3f rotatedPos = rotateX(basePosition, angle);
Vec3f finalPos = gridCenter + rotatedPos;
//Vec3f rotatedDir = rotateY(baseDirection, angle);
Vec3f rotatedDir = (gridCenter - finalPos).normalized();
// Create filename with frame number
char filename[256];
snprintf(filename, sizeof(filename), "output/framex_%03d.bmp", i);
std::cout << "Rendering frame " << i << "/" << numFrames
<< " (angle: " << (angle * 360.0f / M_PI) << " degrees)" << std::endl;