The Quake III Arena sources as originally released under the GPL license on August 20, 2005.

code/botlib/be_aas_bsp.h

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+/*
+===========================================================================
+Copyright (C) 1999-2005 Id Software, Inc.
+
+This file is part of Quake III Arena source code.
+
+Quake III Arena 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 III Arena 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 Foobar; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+===========================================================================
+*/
+
+/*****************************************************************************
+ * name:		be_aas_bsp.h
+ *
+ * desc:		AAS
+ *
+ * $Archive: /source/code/botlib/be_aas_bsp.h $
+ *
+ *****************************************************************************/
+
+#ifdef AASINTERN
+//loads the given BSP file
+int AAS_LoadBSPFile(void);
+//dump the loaded BSP data
+void AAS_DumpBSPData(void);
+//unlink the given entity from the bsp tree leaves
+void AAS_UnlinkFromBSPLeaves(bsp_link_t *leaves);
+//link the given entity to the bsp tree leaves of the given model
+bsp_link_t *AAS_BSPLinkEntity(vec3_t absmins,
+										vec3_t absmaxs,
+										int entnum,
+										int modelnum);
+
+//calculates collision with given entity
+qboolean AAS_EntityCollision(int entnum,
+										vec3_t start,
+										vec3_t boxmins,
+										vec3_t boxmaxs,
+										vec3_t end,
+										int contentmask,
+										bsp_trace_t *trace);
+//for debugging
+void AAS_PrintFreeBSPLinks(char *str);
+//
+#endif //AASINTERN
+
+#define MAX_EPAIRKEY		128
+
+//trace through the world
+bsp_trace_t AAS_Trace(	vec3_t start,
+								vec3_t mins,
+								vec3_t maxs,
+								vec3_t end,
+								int passent,
+								int contentmask);
+//returns the contents at the given point
+int AAS_PointContents(vec3_t point);
+//returns true when p2 is in the PVS of p1
+qboolean AAS_inPVS(vec3_t p1, vec3_t p2);
+//returns true when p2 is in the PHS of p1
+qboolean AAS_inPHS(vec3_t p1, vec3_t p2);
+//returns true if the given areas are connected
+qboolean AAS_AreasConnected(int area1, int area2);
+//creates a list with entities totally or partly within the given box
+int AAS_BoxEntities(vec3_t absmins, vec3_t absmaxs, int *list, int maxcount);
+//gets the mins, maxs and origin of a BSP model
+void AAS_BSPModelMinsMaxsOrigin(int modelnum, vec3_t angles, vec3_t mins, vec3_t maxs, vec3_t origin);
+//handle to the next bsp entity
+int AAS_NextBSPEntity(int ent);
+//return the value of the BSP epair key
+int AAS_ValueForBSPEpairKey(int ent, char *key, char *value, int size);
+//get a vector for the BSP epair key
+int AAS_VectorForBSPEpairKey(int ent, char *key, vec3_t v);
+//get a float for the BSP epair key
+int AAS_FloatForBSPEpairKey(int ent, char *key, float *value);
+//get an integer for the BSP epair key
+int AAS_IntForBSPEpairKey(int ent, char *key, int *value);
+