GODOT IS OPEN SOURCE

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diff --git a/core/math/face3.h b/core/math/face3.h
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+/*************************************************************************/
+/*  face3.h                                                              */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                    http://www.godotengine.org                         */
+/*************************************************************************/
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                 */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+#ifndef FACE3_H
+#define FACE3_H
+
+#include "vector3.h"
+#include "plane.h"
+#include "aabb.h"
+#include "transform.h"
+
+class Face3 {
+public:
+
+        enum Side {
+                SIDE_OVER,
+                SIDE_UNDER,
+                SIDE_SPANNING,
+                SIDE_COPLANAR
+        };
+
+
+        Vector3 vertex[3];
+
+        /**
+         *
+         * @param p_plane plane used to split the face
+         * @param p_res array of at least 3 faces, amount used in functio return
+         * @param p_is_point_over array of at least 3 booleans, determining which face is over the plane, amount used in functio return
+         * @param _epsilon constant used for numerical error rounding, to add "thickness" to the plane (so coplanar points can happen)
+         * @return amount of faces generated by the split, either 0 (means no split possible), 2 or 3
+         */
+                  
+        int split_by_plane(const Plane& p_plane,Face3 *p_res,bool *p_is_point_over) const;
+
+	Plane get_plane(ClockDirection p_dir=CLOCKWISE) const;
+	Vector3 get_random_point_inside() const;
+
+
+        Side get_side_of(const Face3& p_face,ClockDirection p_clock_dir=CLOCKWISE) const;
+
+        bool is_degenerate() const;
+	real_t get_area() const;
+
+        Vector3 get_median_point() const;
+
+	bool intersects_ray(const Vector3& p_from,const Vector3& p_dir,Vector3 * p_intersection=0) const;
+	bool intersects_segment(const Vector3& p_from,const Vector3& p_dir,Vector3 * p_intersection=0) const;
+
+        ClockDirection get_clock_dir() const; ///< todo, test if this is returning the proper clockwisity
+
+        void get_support(const Vector3& p_normal,const Transform& p_transform,Vector3 *p_vertices,int* p_count,int p_max) const;
+        void project_range(const Vector3& p_normal,const Transform& p_transform,float& r_min, float& r_max) const;
+        
+        AABB get_aabb() const {
+
+                AABB aabb( vertex[0], Vector3() );
+                aabb.expand_to( vertex[1] );
+                aabb.expand_to( vertex[2] );
+                return aabb;
+        }
+
+        bool intersects_aabb(const AABB& p_aabb) const;
+	operator String() const;
+
+        inline Face3() {}
+        inline Face3(const Vector3 &p_v1,const Vector3 &p_v2,const Vector3 &p_v3) { vertex[0]=p_v1; vertex[1]=p_v2; vertex[2]=p_v3; }
+
+};
+
+
+#endif // FACE3_H