| #ifndef HSL_H | |
| #define HSL_H | |
| #ifndef NO_GRAPHICS | |
| # include "ezgl/color.hpp" | |
| struct hsl { | |
| double h; // hue a fraction between 0 and 1 | |
| double s; // saturation a fraction between 0 and 1 | |
| double l; // luminesence a fraction between 0 and 1 | |
| }; | |
| /* conversions between color (red, green, and blue) and hsl (hue, saturation, and luminesence) */ | |
| hsl color2hsl(ezgl::color in); | |
| ezgl::color hsl2color(hsl in); | |
| #endif /* NO_GRAPHICS */ | |
| #endif |