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148 lines
3.3 KiB
148 lines
3.3 KiB
#ifndef PNG_HPP
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#define PNG_HPP
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#include <memory>
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#include <vector>
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#include <cassert>
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#include "../pngwriter/pngwriter.h"
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#include "../Canvas.hpp"
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class PNG : public Canvas {
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unsigned int width;
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unsigned int height;
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unsigned int num_colors;
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unsigned int* int_array;
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//std::shared_ptr<std::vector<unsigned int>> int_array;
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public:
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double v;
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PNG(unsigned int width, unsigned int height, unsigned int num_colors = 1):
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Canvas(2), width(width), height(height), num_colors(num_colors), v(0) {
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//int_array = std::make_shared<vstd::vector<unsigned int>>(width*height*num_colors);
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int_array = new unsigned int[width*height*num_colors];
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assert(int_array != nullptr);
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clear();
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LogDebug("New Canvas\n");
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}
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virtual void clear() {
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std::fill_n(int_array, width*height*num_colors, 0);
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}
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virtual void plot(const double* normalizedPosition) {
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const double& x = normalizedPosition[0];
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const double& y = normalizedPosition[1];
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const unsigned int x_int = x*width + width*.5;
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const unsigned int y_int = y*width + height*.5;
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const unsigned int index = x_int + width * y_int;
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if(x_int < width && y_int < height) {
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int_array[index]++;
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}
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}
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virtual void output_file(const char* filename_in) const {
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std::string filename = filename_in;
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filename += ".png";
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unsigned int* max_int = new unsigned int[num_colors];
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double* power = new double[num_colors];
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for(unsigned int i = 0; i < num_colors; i++) {
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max_int[i] = 0;
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double cumulative = 0;
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unsigned int n = 0;
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for(unsigned int j = 0; j < width*height; j++) {
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if(max_int[i] < int_array[j+i*width*height]) {
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max_int[i] = int_array[j+i*width*height];
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}
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if(int_array[j+i* width* height] != 0) {
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cumulative += int_array[j+i*width*height];
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n++;
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}
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}
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if(n > 100) {
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const double average = cumulative / (double)n;
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power[i] = -2.5/log(average/(double)max_int[i]);
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if(power[i] < 0)
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power[i] = 1;
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} else {
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power[i] = 1;
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}
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if(n <= width) {
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LogInfo("not enough data\n");
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return;
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}
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}
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const double vibrancy = 2.0;
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double averagePower = 0;
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for(unsigned int i = 0; i < num_colors; i++) {
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averagePower += power[i];
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}
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averagePower /= (double)num_colors;
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for(unsigned int i = 0; i < num_colors; i++) {
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power[i] = vibrancy*power[i] + (1.0 - vibrancy)*averagePower;
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}
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pngwriter* pngFile = new pngwriter(width, height, 0.0, filename.c_str());
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pngFile->setcompressionlevel(9);
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pngFile->settext("Attractor", "Joshua Moerman", "A awesome attractor", "AwesomeAttractor");
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for(unsigned int x = 0; x < width; x++) {
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for(unsigned int y = 0; y < height; y++) {
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double r = 0.0;
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double g = 0.0;
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double b = 0.0;
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for(unsigned int c = 0; c < num_colors; c++) {
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const double norm_value = (double)int_array[x + y*width + c*width*height]/max_int[c];
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switch(c) {
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case 0: {
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r = (pow(norm_value, power[c]))*3.0;
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//break;
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}
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case 1: {
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g = (pow(norm_value, power[c]*2.0))*3.0;
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//break;
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}
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case 2: {
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b = (pow(norm_value, power[c]*3.0))*3.0;
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//break;
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}
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default:
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break;
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}
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}
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//pngwriter clips values for me
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pngFile->plot(x, y, r, g, b);
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}
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}
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delete[] max_int;
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delete[] power;
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LogInfo("Writing %s\n", filename.c_str());
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pngFile->close();
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delete pngFile;
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LogMoreInfo("File written");
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}
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};
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#endif // PNG_HPP
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