erebus
annotate liberebus/src/texture.h @ 0:4abdce1361b9
initial commit
| author | John Tsiombikas <nuclear@member.fsf.org> |
|---|---|
| date | Sun, 27 Apr 2014 16:02:47 +0300 |
| parents | |
| children | 474a0244f57d |
| rev | line source |
|---|---|
| nuclear@0 | 1 #ifndef TEXTURE_H_ |
| nuclear@0 | 2 #define TEXTURE_H_ |
| nuclear@0 | 3 |
| nuclear@0 | 4 #include "image.h" |
| nuclear@0 | 5 #include "color.h" |
| nuclear@0 | 6 |
| nuclear@0 | 7 class Texture { |
| nuclear@0 | 8 public: |
| nuclear@0 | 9 Image<float> img; |
| nuclear@0 | 10 |
| nuclear@0 | 11 inline Color lookup(float u, float v) const; |
| nuclear@0 | 12 |
| nuclear@0 | 13 bool load(const char *fname) { return img.load(fname); } |
| nuclear@0 | 14 }; |
| nuclear@0 | 15 |
| nuclear@0 | 16 |
| nuclear@0 | 17 inline Color Texture::lookup(float u, float v) const |
| nuclear@0 | 18 { |
| nuclear@0 | 19 int xsz = img.get_width(); |
| nuclear@0 | 20 int ysz = img.get_height(); |
| nuclear@0 | 21 |
| nuclear@0 | 22 int x = (float)u / (float)xsz; |
| nuclear@0 | 23 int y = (float)v / (float)ysz; |
| nuclear@0 | 24 |
| nuclear@0 | 25 float *pix = img.get_pixels() + ((y % ysz) * xsz + (x % xsz)) * 4; |
| nuclear@0 | 26 return Color(pix[0], pix[1], pix[2]); |
| nuclear@0 | 27 } |
| nuclear@0 | 28 |
| nuclear@0 | 29 |
| nuclear@0 | 30 #endif // TEXTURE_H_ |