typedef struct {
    double v[3];
} point_t;

typedef struct {
    double   x, y;
} point2D_t;

typedef struct {
    int         color;
    int         numverts;
    point_t     verts[MAX_POLY_VERTS];
} polygon_t;

typedef struct {
    int         color;
    int         numverts;
    point2D_t   verts[MAX_POLY_VERTS];
} polygon2D_t;

typedef struct convexobject_s {
    struct convexobject_s   *pnext;
    point_t                 center;
    double                  vdist;
    int                     numpolys;
    polygon_t               *ppoly;
} convexobject_t;

typedef struct {
    double  distance;
    point_t normal;
 } plane_t;