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  1. #include <iostream>
  2. #include <cmath>
  3.  
  4. struct VolumeObject
  5. {
  6. 	float Red, Green, Blue, Alpha, Volume;
  7.  
  8. 	VolumeObject(float red, float green, float blue, float alpha, float volume) : Red(red), Green(green), Blue(blue), Alpha(alpha), Volume(volume)
  9. 	{
  10. 	}
  11. };
  12.  
  13. int main()
  14. {
  15. 	VolumeObject volumes[] = { VolumeObject(1, 0, 0, 0.5f, 0.25f), VolumeObject(1, 0, 0, 0.5f, 0.5f), VolumeObject(1, 0, 0, 0.5f, 0.25f) };
  16.  
  17. 	float colorR = 0;
  18. 	float colorG = 0;
  19. 	float colorB = 0;
  20. 	float colorA = 1;
  21.  
  22. 	for (int i = 0; i < 3; ++i)
  23. 	{
  24. 		float scale = colorA - colorA * exp(-volumes[i].Alpha * volumes[i].Volume);
  25. 		std::cout << "Scale: " << scale << std::endl;
  26. 		colorR += volumes[i].Red * scale;
  27. 		colorG += volumes[i].Green * scale;
  28. 		colorB += volumes[i].Blue * scale;
  29. 		colorA *= exp(-volumes[i].Alpha * volumes[i].Volume);
  30. 		std::cout << colorR << " " << colorG << " " << colorB << " " << colorA << std::endl;
  31. 	}
  32. 	colorR /= colorA;
  33. 	colorG /= colorA;
  34. 	colorB /= colorA;
  35. 	colorA /= colorA;
  36. 	std::cout << "Final Color" << std::endl;
  37. 	std::cout << colorR << " " << colorG << " " << colorB << " " << colorA << std::endl;
  38. 	return 0;
  39. }
Success #stdin #stdout 0.02s 2724KB
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stdin
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Standard input is empty
stdout
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Scale: 0.117503
0.117503 0 0 0.882497
Scale: 0.195208
0.312711 0 0 0.687289
Scale: 0.0807586
0.393469 0 0 0.606531
Final Color
0.648721 0 0 1
https://ideone.com/PVXdB
language:
C++ (gcc 8.3)
created:
13 years ago
visibility:
public

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