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  1. #include <iostream>
  2. #include <fstream>
  3. #include <cmath>
  4.  
  5. using namespace std;
  6.  
  7. int main() {
  8.     const int WIDTH = 800;
  9.     const int HEIGHT = 600;
  10.     const int MAX_ITER = 1000;
  11.  
  12.     double xmin = -2.0, xmax = 1.5;
  13.     double ymin = -2.0, ymax = 1.5;
  14.  
  15.     ofstream img("burning_ship.ppm");
  16.     img << "P3\n" << WIDTH << " " << HEIGHT << "\n255\n";
  17.  
  18.     for (int y = 0; y < HEIGHT; y++) {
  19.         for (int x = 0; x < WIDTH; x++) {
  20.  
  21.             // mapare pixel -> plan complex
  22.             double a = xmin + x * (xmax - xmin) / WIDTH;
  23.             double b = ymin + y * (ymax - ymin) / HEIGHT;
  24.  
  25.             double zx = 0, zy = 0;
  26.             int iter = 0;
  27.  
  28.             while (zx*zx + zy*zy <= 4 && iter < MAX_ITER) {
  29.                 double xtemp = zx*zx - zy*zy + a;
  30.                 zy = 2 * abs(zx) * abs(zy) + b;
  31.                 zx = xtemp;
  32.                 iter++;
  33.             }
  34.  
  35.             // colorare
  36.             int color = (int)(255.0 * iter / MAX_ITER);
  37.             img << color << " " << 0 << " " << (255 - color) << " ";
  38.         }
  39.         img << "\n";
  40.     }
  41.  
  42.     img.close();
  43.     cout << "Imaginea a fost generata: burning_ship.ppm\n";
  44.     return 0;
  45. }
  46.  
Success #stdin #stdout 0.31s 5320KB
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Imaginea a fost generata: burning_ship.ppm
https://ideone.com/uiWrw3
language:
C++ (gcc 8.3)
created:
11 hours ago
visibility:
public

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