File indexing completed on 2024-04-21 14:46:26

 /*
 ** Author: Eric Veach, July 1994.
 **
 */
 
 #ifndef __tessmono_h_
 #define __tessmono_h_
 
 /* __gl_meshTessellateMonoRegion( face ) tessellates a monotone region
  * (what else would it do??)  The region must consist of a single
  * loop of half-edges (see mesh.h) oriented CCW.  "Monotone" in this
  * case means that any vertical line intersects the interior of the
  * region in a single interval.
  *
  * Tessellation consists of adding interior edges (actually pairs of
  * half-edges), to split the region into non-overlapping triangles.
  *
  * __gl_meshTessellateInterior( mesh ) tessellates each region of
  * the mesh which is marked "inside" the polygon.  Each such region
  * must be monotone.
  *
  * __gl_meshDiscardExterior( mesh ) zaps (ie. sets to NULL) all faces
  * which are not marked "inside" the polygon.  Since further mesh operations
  * on NULL faces are not allowed, the main purpose is to clean up the
  * mesh so that exterior loops are not represented in the data structure.
  *
  * __gl_meshSetWindingNumber( mesh, value, keepOnlyBoundary ) resets the
  * winding numbers on all edges so that regions marked "inside" the
  * polygon have a winding number of "value", and regions outside
  * have a winding number of 0.
  *
  * If keepOnlyBoundary is TRUE, it also deletes all edges which do not
  * separate an interior region from an exterior one.
  */
 
 int __gl_meshTessellateMonoRegion(GLUface *face);
 int __gl_meshTessellateInterior(GLUmesh *mesh);
 void __gl_meshDiscardExterior(GLUmesh *mesh);
 int __gl_meshSetWindingNumber(GLUmesh *mesh, int value, GLboolean keepOnlyBoundary);
 
 #endif