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

qe4/select.h

@@ -0,0 +1,62 @@
+/*
+===========================================================================
+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
+===========================================================================
+*/
+
+typedef enum
+{
+	sel_brush,
+	// sel_sticky_brush,
+	// sel_face,
+	sel_vertex,
+	sel_edge
+} select_t;
+
+typedef struct
+{
+	brush_t		*brush;
+	face_t		*face;
+	float		dist;
+	qboolean	selected;
+} trace_t;
+
+#define	SF_SELECTED_ONLY	1
+#define	SF_ENTITIES_FIRST	2
+#define	SF_SINGLEFACE		4
+
+
+trace_t Test_Ray (vec3_t origin, vec3_t dir, int flags);
+
+void Select_GetBounds (vec3_t mins, vec3_t maxs);
+void Select_Brush (brush_t *b);
+void Select_Ray (vec3_t origin, vec3_t dir, int flags);
+void Select_Delete (void);
+void Select_Deselect (void);
+void Select_Clone (void);
+void Select_Move (vec3_t delta);
+void Select_SetTexture (texdef_t *texdef);
+void Select_FlipAxis (int axis);
+void Select_RotateAxis (int axis, float deg);
+void Select_CompleteTall (void);
+void Select_PartialTall (void);
+void Select_Touching (void);
+void Select_Inside (void);
+void Select_MakeStructural (void);
+void Select_MakeDetail (void);