/* $Id: paint.h,v 1.15 2001/03/30 12:12:13 spb Exp $ */
#ifndef PAINT
#define PAINT

#include "crinkle.h"

/* colour code definitions */
typedef int Col;
typedef unsigned short Gun;

typedef struct graph{
  int graph_height;     /* height of display */
  int graph_width ;     /* width of display */

  int width;            /* width of terrain strip */

  float ambient;        /* level of ambient light */
  float contrast;       /* contrast,
                         * increases or decreases effect of cosine rule */
  float contour;
  float vfract;         /* relative strength of vertical light relative
                        * to the main light source
                        */
  float altitude;
  float distance;
  double phi;           /* angle of the light (vertical plane)*/
  double alpha;         /* angle of the light (horizontal plane) 
                         * must have -pi/4 < alpha < pi/4
                         */
  Height base_shift;    /* offset from calcalt to artist coordinates */
  Height sealevel;
  double stretch;       /* vertical stretch */
  int n_col;
  int band_size;
  int levels;
  int stop;
  int map;
  int reflec;
  int repeat;
  int pos;
  int scroll;
}Graph;

#define BLACK       0
#define WHITE       1
#define SEA_LIT     2
#define SEA_UNLIT   3
#define SKY         4
#define BAND_BASE   5
#ifndef BAND_SIZE
#define BAND_SIZE   80
#endif
#define N_BANDS     3
#define DEF_COL     (BAND_BASE + (N_BANDS * BAND_SIZE))
#define MIN_COL     (BAND_BASE + (N_BANDS * 2))
#define COL_RANGE   65535

#define PI 3.14159265

#ifdef ANSI
void set_clut(int, Gun *, Gun *, Gun *);
Height *extract(Strip *s);
void init_artist_variables();
Col get_col(Height p, Height p_plus_x, Height p_plus_y, Height shadow);
Col *makemap(Height *a, Height *b, Height *shadow);
Col *camera(Height *a, Height *b, Height *shadow);
Col *mirror(Height *a, Height *b, Height *shadow);
int project( int x , Height y );
#else
void set_clut();
Height *extract();
void init_artist_variables();
Col get_col();
Col *makemap();
Col *camera();
Col *mirror();
int project();
#endif


#endif