www.pudn.com > LightTrack.rar > Colour.cpp

/** 3DGPL *************************************************\ 
 * ()                                                     * 
 * Handling of colour and lighting.                       * 
 *                                                        * 
 * Ifdefs:                                                * 
 *  _CI_                     Colour/Intensity model;      * 
 *  _RGB_                    RGB model;                   * 
 *                                                        * 
 * Defines:                                               * 
 *  CL_init_colours          Initialization;              * 
 *  CL_colour                Composing a colour;          * 
 *  CL_light                 Lighting a colour.           * 
 *                                                        * 
 * (c) 1995-98 Sergei Savchenko, (savs@cs.mcgill.ca)      * 
\**********************************************************/ 
//Color.cpp 
 
#include "Colour.h"               /* colour models. */ 
 
int CL_div[CL_COLOUR_LEVELS][CL_LIGHT_LEVELS]; 
HW_pixel *CL_intensities;                   /* intensity table */ 
 
#if defined(_CI_) 
struct CL_palette *CL_colours;              /* saved for hardware access */ 
#endif 
 
/**********************************************************\ 
 * Initializing internal lookup tables.                   * 
 *                                                        * 
 * SETS: CL_intensity (when _CI_) CL_div (when _RGB_)     * 
 * -----                                                  * 
\**********************************************************/ 
 
#if defined(_CI_) 
void CL_init_colour(struct CL_palette *palette) 
{ 
 CL_colours=palette; 
 CL_intensities=palette->cl_intensity_table;/* for palette based models */ 
} 
#endif 
 
//初始化内部查找表，具体不是特别清楚 
#if defined(_RGB_) 
void CL_init_colour(void) 
{ 
 int i,j;                                   /* for RGB modes */ 
 
 for(i=0;i