patch to import Jon Smirl's work from Bitkeeper

1 files changed, 108 insertions, 0 deletions

diff --git a/src/glu/mini/tess.h b/src/glu/mini/tess.h
new file mode 100644
index 00000000000..908e20972cf
--- /dev/null
+++ b/src/glu/mini/tess.h
@@ -0,0 +1,108 @@
+/* $Id: tess.h,v 1.2 2003/08/22 20:11:43 brianp Exp $ */
+
+/*
+ * Mesa 3-D graphics library
+ * Version:  3.3
+ * Copyright (C) 1995-2000  Brian Paul
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the Free
+ * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+
+/*
+ * This file is part of the polygon tesselation code contributed by
+ * Bogdan Sikorski
+ */
+
+
+#ifndef TESS_H
+#define TESS_H
+
+
+#include "gluP.h"
+
+#define EPSILON 1e-06		/* epsilon for double precision compares */
+
+typedef enum
+{
+   OXY,
+   OYZ,
+   OXZ
+}
+projection_type;
+
+typedef struct callbacks_str
+{
+   void (GLCALLBACK * begin) (GLenum mode);
+   void (GLCALLBACK * edgeFlag) (GLboolean flag);
+   void (GLCALLBACK * vertex) (GLvoid * v);
+   void (GLCALLBACK * end) (void);
+   void (GLCALLBACK * error) (GLenum err);
+}
+tess_callbacks;
+
+typedef struct vertex_str
+{
+   void *data;
+   GLdouble location[3];
+   GLdouble x, y;
+   GLboolean edge_flag;
+   struct vertex_str *shadow_vertex;
+   struct vertex_str *next, *previous;
+}
+tess_vertex;
+
+typedef struct contour_str
+{
+   GLenum type;
+   GLuint vertex_cnt;
+   GLdouble area;
+   GLenum orientation;
+   struct vertex_str *vertices, *last_vertex;
+   struct contour_str *next, *previous;
+}
+tess_contour;
+
+typedef struct polygon_str
+{
+   GLuint vertex_cnt;
+   GLdouble A, B, C, D;
+   GLdouble area;
+   GLenum orientation;
+   struct vertex_str *vertices, *last_vertex;
+}
+tess_polygon;
+
+struct GLUtesselator
+{
+   tess_contour *contours, *last_contour;
+   GLuint contour_cnt;
+   tess_callbacks callbacks;
+   tess_polygon *current_polygon;
+   GLenum error;
+   GLdouble A, B, C, D;
+   projection_type projection;
+};
+
+
+extern void tess_call_user_error(GLUtriangulatorObj *, GLenum);
+extern void tess_test_polygon(GLUtriangulatorObj *);
+extern void tess_find_contour_hierarchies(GLUtriangulatorObj *);
+extern void tess_handle_holes(GLUtriangulatorObj *);
+extern void tess_tesselate(GLUtriangulatorObj *);
+extern void tess_tesselate_with_edge_flag(GLUtriangulatorObj *);
+
+
+#endif