The Quake 2 tools as originally released under the GPL license.

qe4/brush.h

@@ -0,0 +1,87 @@
+/*
+===========================================================================
+Copyright (C) 1997-2006 Id Software, Inc.
+
+This file is part of Quake 2 Tools source code.
+
+Quake 2 Tools source code is free software; you can redistribute it
+and/or modify it under the terms of the GNU General Public License as
+published by the Free Software Foundation; either version 2 of the License,
+or (at your option) any later version.
+
+Quake 2 Tools source code 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 General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with Quake 2 Tools source code; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+===========================================================================
+*/
+
+// brush.h
+
+
+typedef struct
+{
+	int		numpoints;
+	int		maxpoints;
+	float 	points[8][5];			// variable sized
+} winding_t;
+
+
+// the normals on planes point OUT of the brush
+#define	MAXPOINTS	16
+typedef struct face_s
+{
+	struct face_s	*next;
+	vec3_t		planepts[3];
+    texdef_t	texdef;
+
+    plane_t		plane;
+
+	winding_t  *face_winding;
+
+	vec3_t		d_color;
+	qtexture_t *d_texture;
+
+//	int         d_numpoints;
+//	vec3_t     *d_points;
+} face_t;
+
+#define	MAX_FACES	16
+typedef struct brush_s
+{
+	struct brush_s	*prev, *next;	// links in active/selected
+	struct brush_s	*oprev, *onext;	// links in entity
+	struct entity_s	*owner;
+	vec3_t	mins, maxs;
+
+	face_t     *brush_faces;
+} brush_t;
+
+
+void     Brush_AddToList (brush_t *b, brush_t *list);
+void     Brush_Build(brush_t *b);
+void     Brush_BuildWindings( brush_t *b );
+brush_t *Brush_Clone (brush_t *b);
+brush_t	*Brush_Create (vec3_t mins, vec3_t maxs, texdef_t *texdef);
+void     Brush_Draw( brush_t *b );
+void     Brush_DrawXY( brush_t *b );
+void     Brush_Free (brush_t *b);
+void     Brush_MakeSided (int sides);
+void     Brush_Move (brush_t *b, vec3_t move);
+brush_t *Brush_Parse (void);
+face_t  *Brush_Ray (vec3_t origin, vec3_t dir, brush_t *b, float *dist);
+void     Brush_RemoveFromList (brush_t *b);
+void     Brush_SelectFaceForDragging (brush_t *b, face_t *f, qboolean shear);
+void     Brush_SetTexture (brush_t *b, texdef_t *texdef);
+void     Brush_SideSelect (brush_t *b, vec3_t origin, vec3_t dir, qboolean shear);
+void     Brush_Write (brush_t *b, FILE *f);
+void	Brush_RemoveEmptyFaces ( brush_t *b );
+
+int        AddPlanept (float *f);
+face_t	  *Face_Clone (face_t *f);
+void       Face_Draw( face_t *face );
+winding_t *MakeFaceWinding (brush_t *b, face_t *face);