#ifndef _PROJECTION_H
#define _PROJECTION_H

typedef struct _PtRec {
  XPoint loc;
  double depth;
} PtRec, *Pt;

typedef struct _PolyRec {
  double depth;
  int num_verts;
  XPoint *vertices;
  Widget tag;
} PolyRec, *Poly;

typedef struct _ProjectionRec {
  int num_polys;
  Poly *polygons;
} ProjectionRec, *Projection;

#endif _PROJECTION_H