yggdrasil75/stupidsimcpp
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

trying to fix noise.

Browse Source
This commit is contained in:
Yggdrasil75
2025-11-21 14:50:56 -05:00
parent 4ad2b166f2
commit 4508c8d7f6
4 changed files with 60 additions and 13 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
util/grid/grid2.hpp
View File

@@ -225,6 +225,9 @@ public:
Grid2 noiseGenGrid(size_t minx,size_t miny, size_t maxx, size_t maxy
, float minChance = 0.1f, float maxChance = 1.0f, bool color = true) {
std::cout << "generating a noise grid with the following: (" << minx << ", " << miny
<< ") by (" << maxx << ", " << maxy << ") " << "chance: " << minChance
<< " max: " << maxChance << " gen colors: " << color << std::endl;
std::vector<Vec2> poses;
std::vector<Vec4> colors;
std::vector<float> sizes;
@@ -233,6 +236,7 @@ public:
Vec2 pos = Vec2(x,y);
float alpha = noisegen.permute(Vec2(x,y));
if (alpha > minChance && alpha < maxChance) {
std::cout << "generating at: " << pos.x << ", " << pos.y << ")" << std::endl;
if (color) {
float red = noisegen.permute(pos);
float green = noisegen.permute(pos);
@@ -585,7 +589,7 @@ public:
// no return because it passes back a 1d vector of ints between 0 and 255 with a width and height
//get region as rgb
void getGridRegionAsRGB(const Vec2& minCorner, const Vec2& maxCorner,
int& width, int& height, std::vector<uint8_t>& rgbData) const {
int& width, int& height, std::vector<uint8_t>& rgbData) const {
TIME_FUNCTION;
// Calculate dimensions
width = static_cast<int>(maxCorner.x - minCorner.x);
@@ -605,13 +609,13 @@ public:
// for (int y = minCorner.y; x < maxCorner.y; y++){
// Vec2 pos = Vec2(x,y);
// size_t posID = getPositionVec(pos, 1.0f, false);
// }
// }
// For each position in the grid, find the corresponding pixel
for (const auto& [id, pos] : Positions) {
size_t size = Sizes.at(id);
// Calculate pixel coordinates
int pixelXm = static_cast<int>(pos.x - size/2 - minCorner.x);
int pixelXM = static_cast<int>(pos.x + size/2 - minCorner.x);
@@ -622,7 +626,7 @@ public:
pixelXM = std::min(width - 1, pixelXM);
pixelYm = std::max(0, pixelYm);
pixelYM = std::min(height - 1, pixelYM);
// Ensure within bounds
if (pixelXM >= minCorner.x && pixelXm < width && pixelYM >= minCorner.y && pixelYm < height) {
const Vec4& color = Colors.at(id);
@@ -632,7 +636,7 @@ public:
for (int px = pixelXm; px <= pixelXM; ++px){
int index = (py * width + px);
Vec4 dest = rgbaBuffer[index];
// Alpha blending: new_color = src * src_alpha + dest * (1 - src_alpha)
dest.r = color.r * srcAlpha + dest.r * invSrcAlpha;
dest.g = color.g * srcAlpha + dest.g * invSrcAlpha;