www.pudn.com > RayTracing Code.rar > Graphics.h, change:2004-04-11,size:4825b

 
#if ((!defined(_CI_)) && (!defined(_RGB_))) 
 #error Either _CI_ or _RGB_ must be declared. 
#endif 
#if ((!defined(_Z_BUFFER_)) && (!defined(_PAINTER_))) 
 #error Either _Z_BUFFER_ or _PAINTER_ must be declared. 
#endif 
#if ((!defined(_STEREO_)) && (!defined(_MONO_))) 
 #error Either _STEREO_ or _MONO_ must be declared. 
#endif 
 
#if !defined(_GRAPHICS_H_) 
#define _GRAPHICS_H_ 
 
/** 3DGPL *************************************************\ 
 * ()                                                     * 
 * Header for 2D graphics stuff.                          * 
 *                                                        * 
 * Ifdefs:                                                * 
 *  _CI_                     Colour/Intensity model;      * 
 *  _RGB_                    RGB model;                   * 
 *  _Z_BUFFER_               Depth array;                 * 
 *  _PAINTER_                Back to front order;         * 
 *  _STEREO_                 Interlaced 2 page image;     * 
 *  _MONO_                   Single page.                 *  
 *                                                        * 
 * Files:                                                 * 
 *  grp-base.c               Basic graphics;              * 
 *  grp-text.c               Text;                        * 
 *  grp-poly.c               Polygon rendering.           *  
 *                                                        * 
 * (c) 1995-98 Sergei Savchenko, (savs@cs.mcgill.ca)      * 
\**********************************************************/ 
 
#include "RayTracing.h"           /* HW_pixel */ 
 
#define G_MAX_POLYGON_VERTICES  16          /* points in a polygon */ 
#define G_Z_MAPPING_SWITCH    1024          /* when switch linear/non-linear */ 
#define G_P                     16          /* fixed point precision */ 
 
#if defined(_CI_) 
 #if defined(_Z_BUFFER_)                    /* Z I Tx Ty */ 
  #define G_LNG_FLAT     3                  /* X Y Z */ 
  #define G_LNG_SHADED   4                  /* X Y Z I */ 
  #define G_LNG_TEXTURED 6                  /* X Y Z I Tx Ty */ 
 #endif 
 #if defined(_PAINTER_)                     /* I Tx Ty */ 
  #define G_LNG_FLAT     2                  /* X Y */ 
  #define G_LNG_SHADED   3                  /* X Y I */ 
  #define G_LNG_TEXTURED 5                  /* X Y I Tx Ty */ 
 #endif 
#endif 
#if defined(_RGB_) 
 #if defined(_Z_BUFFER_)                    /* Z R G B Tx Ty */ 
  #define G_LNG_FLAT     3                  /* X Y Z */ 
  #define G_LNG_SHADED   6                  /* X Y Z R G B */ 
  #define G_LNG_TEXTURED 8                  /* X Y Z R G B Tx Ty */ 
 #endif 
 #if defined(_PAINTER_)                     /* R G B Tx Ty */ 
  #define G_LNG_FLAT     2                  /* X Y */ 
  #define G_LNG_SHADED   5                  /* X Y R G B */ 
  #define G_LNG_TEXTURED 7                  /* X Y R G B Tx Ty */ 
 #endif 
#endif 
 
extern HW_pixel *G_c_buffer; 
extern long G_c_buffer_size; 
void G_init_graphics(void); 
 
#if defined(_STEREO_) 
 #define G_LEFT_EYE  0x0                    /* render image for left eye */ 
 #define G_RIGHT_EYE 0x1                    /* render image for right eye */ 
void G_page(int page_no); 
#endif 
#if defined(_CI_) 
void G_clear(HW_pixel colour,int intensity); 
void G_pixel(int *vertex,HW_pixel colour); 
void G_dot(int *vertex,HW_pixel colour,int intensity); 
void G_line(int *vertex1,int *vertex2, 
            HW_pixel colour,int intensity 
	   ); 
void G_text(int x,int y,char *txt, 
            HW_pixel colour,int intensity 
	   ); 
void G_flat_polygon(int *edges,int length, 
                    HW_pixel colour,int intensity 
                   ); 
#endif 
#if defined(_RGB_) 
void G_clear(HW_pixel colour,int red,int green,int blue); 
void G_pixel(int *vertex,HW_pixel colour); 
void G_dot(int *vertex,HW_pixel colour,int red,int green,int blue); 
void G_line(int *vertex1,int *vertex2, 
            HW_pixel colour,int red,int green,int blue 
           ); 
void G_text(int x,int y,char *txt, 
            HW_pixel colour,int red,int green,int blue 
           ); 
void G_flat_polygon(int *edges,int length, 
                    HW_pixel colour,int red,int green,int blue 
                   ); 
#endif 
void G_shaded_polygon(int *edges,int length,HW_pixel colour); 
void G_lin_textured_polygon(int *edges,int length, 
                            HW_pixel *texture, 
                            int log_texture_size 
                           ); 
void G_prp_textured_polygon(int *edges,int length, 
                            int *O,int *u,int *v, 
                            HW_pixel *texture, 
                            int log_texture_size, 
                            int log_texture_scale 
                           ); 
 
/*********************************************************/ 
 
#endif