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Microsoft Windows NT Build 297 06-28-1992

/************************************************************************\
*
*  PAINT.H
*
\************************************************************************/



/************************************************************************\
*                          SYMBOLIC CONSTANTS
\************************************************************************/

#define  NUMVERTICES  8 /* number of polyhedron vertices */
#define  NUMFACETS    6 /* number of polyhedron facets   */

#define  MAX_POINTS_PER_FACET 4

#define  XROT_INCREMENT  (float) 0.0872  /* 5  degrees */
#define  YROT_INCREMENT  (float) 0.1744  /* 10 degrees */
#define  ZROT_INCREMENT  (float) 0.2617  /* 15 degrees */



/************************************************************************\
*                              TYPEDEFs
\************************************************************************/

typedef struct { LONG x, y, z; } POINT3D;



/************************************************************************\
*                          GLOBAL VARIABLES
\************************************************************************/

/*  This particular set of vertices ("v") and facets describe a normalized
 *  cube centered about the origin. The facet list is made up of a series
 *  of indexes into the array of vertices, each describing an individual
 *  facet (eg. a polygon), and are separated by -1. Note that the facets
 *  are decribed in COUNTERCLOCKWISE order (so we can consistently find
 *  the normal to any given facet).
 */
static POINT3D v[NUMVERTICES] = {{ 1, 1, 1}, { 1,-1, 1},
                                 {-1,-1, 1}, {-1, 1, 1},
                                 { 1, 1,-1}, { 1,-1,-1},
                                 {-1,-1,-1}, {-1, 1,-1}  };


static int facets[30] = { 3, 2, 1, 0, -1,
                          4, 5, 6, 7, -1,
                          0, 1, 5, 4, -1,
                          6, 2, 3, 7, -1,
                          7, 3, 0, 4, -1,
                          5, 1, 2, 6, -1  };

POINT3D xv[NUMVERTICES]; /* will hold the transformed points in "v" */

float   m[2][3]; /* the transformation matrix */



/************************************************************************\
*                         FUNCTION PROTOTYPES
\************************************************************************/

void ComputeXform  (float, float, float);
void XformVertices (int, int);

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