--- /dev/null
+/*
+Copyright (C) 1999-2006 Id Software, Inc. and contributors.
+For a list of contributors, see the accompanying CONTRIBUTORS file.
+
+This file is part of GtkRadiant.
+
+GtkRadiant 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.
+
+GtkRadiant 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 GtkRadiant; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+*/
+
+#if !defined(INCLUDED_CSG_H)
+#define INCLUDED_CSG_H
+
+void CSG_MakeHollow (void);
+void CSG_Subtract (void);
+void CSG_Merge (void);
+
+namespace scene
+{
+ class Graph;
+}
+template<typename Element> class BasicVector3;
+typedef BasicVector3<float> Vector3;
+class Plane3;
+
+void Scene_BrushSetClipPlane(scene::Graph& graph, const Plane3& plane);
+enum EBrushSplit
+{
+ eFront,
+ eBack,
+ eFrontAndBack,
+};
+void Scene_BrushSplitByPlane(scene::Graph& graph, const Vector3& p0, const Vector3& p1, const Vector3& p2, const char* shader, EBrushSplit split);
+
+#endif