g2chromatic2. written with 0 ai just to see if I could. uses grid22.hpp.

tests/g2chromatic2.cpp

@@ -0,0 +1,112 @@
+#include <iostream>
+#include <vector>
+#include <random>
+#include <algorithm>
+#include <cmath>
+#include "../util/grid/grid22.hpp"
+#include "../util/output/aviwriter.hpp"
+#include "../util/output/bmpwriter.hpp"
+#include "../util/timing_decorator.cpp"
+
+struct AnimationConfig {
+    int width = 1024;
+    int height = 1024;
+    int totalFrames = 480;
+    float fps = 30.0f;
+    int numSeeds = 1;
+};
+
+Grid2 setup(AnimationConfig config) {
+    TIME_FUNCTION;
+    Grid2 grid;
+    std::vector<Vec2> pos;
+    std::vector<Vec4> colors;
+    std::vector<float> sizes;
+    for (int y = 0; y < config.height; ++y) {
+        for (int x = 0; x < config.width; ++x) {
+            float gradient = (x + y) / float(config.width + config.height - 2);
+            pos.push_back(Vec2(x,y));
+            colors.push_back(Vec4(gradient, gradient, gradient, 1.0f));
+            sizes.push_back(1.0f);
+        }
+    }
+    grid.bulkAddObjects(pos,colors,sizes);
+    return grid;
+}
+
+void Preview(Grid2 grid) {
+    TIME_FUNCTION;
+    int width;
+    int height;
+    std::vector<uint8_t> rgbData;
+
+    grid.getGridAsRGB(width,height,rgbData);
+    bool success = BMPWriter::saveBMP("output/grayscalesource.bmp", rgbData, width, height);
+}
+
+std::vector<std::pair<Vec2, Vec4>> pickSeeds(Grid2 grid, AnimationConfig config) {
+    TIME_FUNCTION;
+    std::random_device rd;
+    std::mt19937 gen(rd());
+    std::uniform_int_distribution<> xDist(0, config.width - 1);
+    std::uniform_int_distribution<> yDist(0, config.height - 1);
+    std::uniform_real_distribution<> colorDist(0.2f, 0.8f);
+
+    std::vector<std::pair<Vec2, Vec4>> seeds;
+
+    for (int i = 0; i < config.numSeeds; ++i) {
+        Vec2 point(xDist(gen), yDist(gen));
+        Vec4 color(colorDist(gen), colorDist(gen), colorDist(gen), colorDist(gen));
+        seeds.push_back(std::make_pair(point, color));
+        // Or in C++17 and later, you can use:
+        // seeds.push_back({point, color});
+    }
+    for (int i = 0; i < seeds.size(); ++i) {
+        size_t id = grid.getPositionVec(seeds[i].first);
+        grid.setColor(id,seeds[i].second);
+    }
+    return seeds;
+}
+
+void expandPixel(Grid2& grid, AnimationConfig config, std::vector<std::pair<Vec2, Vec4>> seeds) {
+    TIME_FUNCTION;
+    for (int i = 0; i < seeds.size(); ++i) {
+        size_t id = grid.getPositionVec(seeds[i].first);
+        std::vector<size_t> neighbors = grid.getNeighbors(id);
+        for (int j = 0; j < neighbors.size(); ++j) {
+            size_t neighbor = neighbors[j];
+            Vec4 neighborColor = grid.getColor(neighbor);
+            Vec4 newcolor = (neighborColor - seeds[i].second) / float(config.width + config.height - 2);
+            grid.setColor(neighbor, newcolor);
+        }
+    }
+}
+
+bool exportavi(std::vector<std::vector<uint8_t>> frames, AnimationConfig config) {
+    TIME_FUNCTION;
+    bool success = AVIWriter::saveAVI("output/g2chromatic.avi", frames, config.width, config.height);
+    return success;
+}
+
+int main() {
+    AnimationConfig config;
+    
+    Grid2 grid = setup(config);
+    grid.updateNeighborMap();
+    Preview(grid);
+    std::vector<std::pair<Vec2, Vec4>> seeds = pickSeeds(grid,config);
+    std::vector<std::vector<uint8_t>> frames;
+    for (int i = 0; i < config.totalFrames; ++i){
+        std::cout << "Processing frame " << i + 1 << "/" << config.totalFrames << std::endl;
+        expandPixel(grid,config,seeds);
+        int width;
+        int height;
+        std::vector<uint8_t> frame;
+        grid.getGridAsBGR(width,height,frame);
+        frames.push_back(frame);
+    }
+    
+
+    FunctionTimer::printStats(FunctionTimer::Mode::ENHANCED);
+    return 0;
+}