SceneGraph support for bounding boxs

1 files changed, 130 insertions, 0 deletions

diff --git a/source/gameengine/SceneGraph/SG_BBox.h b/source/gameengine/SceneGraph/SG_BBox.h
new file mode 100644
index 00000000000..6e3d208ea54
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+++ b/source/gameengine/SceneGraph/SG_BBox.h
@@ -0,0 +1,130 @@
+/**
+ * $Id$
+ *
+ * ***** BEGIN GPL/BL DUAL LICENSE BLOCK *****
+ *
+ * This program 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. The Blender
+ * Foundation also sells licenses for use in proprietary software under
+ * the Blender License.  See http://www.blender.org/BL/ for information
+ * about this.
+ *
+ * This program 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 this program; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ *
+ * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
+ * All rights reserved.
+ *
+ * The Original Code is: all of this file.
+ *
+ * Contributor(s): none yet.
+ *
+ * ***** END GPL/BL DUAL LICENSE BLOCK *****
+ * Bounding Box
+ */
+ 
+#ifndef __SG_BBOX_H__
+#define __SG_BBOX_H__
+ 
+#include "MT_Scalar.h"
+#include "MT_Point3.h"
+#include "MT_Vector3.h"
+#include "MT_Transform.h"
+
+#include <vector> 
+
+class SG_Node;
+
+/**
+ * Bounding box class.
+ * Holds the minimum and maximum axis aligned points of a node's bounding box,
+ * in world coordinates.
+ */
+class SG_BBox
+{
+	MT_Point3 m_min;
+	MT_Point3 m_max;
+public:
+	typedef enum { INSIDE, INTERSECT, OUTSIDE } intersect;
+	SG_BBox();
+	SG_BBox(const MT_Point3 &min, const MT_Point3 &max);
+	SG_BBox(const SG_BBox &other, const MT_Transform &world);
+	SG_BBox(const SG_BBox &other);
+	~SG_BBox();
+
+	/**
+	 * Enlarges the bounding box to contain the specified point.
+	 */
+	SG_BBox& operator +=(MT_Point3 &point);
+	/**
+	 * Enlarges the bounding box to contain the specified bound box.
+	 */
+	SG_BBox& operator +=(SG_BBox &bbox);
+	
+	SG_BBox operator + (SG_BBox &bbox2) const;
+#if 0
+	/**
+	 * Translates the bounding box.
+	 */
+	void translate(const MT_Vector3 &dx);
+	/**
+	 * Scales the bounding box about the optional point.
+	 */
+	void scale(const MT_Vector3 &size, const MT_Point3 &point = MT_Point3(0., 0., 0.));
+#endif
+	SG_BBox transform(const MT_Transform &world) const;
+	/**
+	 * Computes the volume of the bounding box.
+	 */
+	MT_Scalar volume() const;
+	
+	/**
+	 * Test if the given point is inside this bounding box.
+	 */
+	bool inside(const MT_Point3 &point) const;
+	
+	/**
+	 * Test if the given bounding box is inside this bounding box.
+	 */
+	bool inside(const SG_BBox &other) const;
+
+	/**
+	 * Test if the given bounding box is outside this bounding box.
+	 */
+	bool outside(const SG_BBox &other) const;
+	
+	/**
+	 * Test if the given bounding box intersects this bounding box.
+	 */
+	bool intersects(const SG_BBox &other) const;
+	
+	/**
+	 * Test the given bounding box with this bounding box.
+	 */
+	intersect test(const SG_BBox &other) const;
+	
+	/**
+	 * Get the eight points that define this bounding box.
+	 *
+	 * @param world a world transform to apply to the produced points bounding box.
+	 */
+	void get(MT_Point3 *box, const MT_Transform &world) const;
+	/**
+	 * Get the eight points that define this axis aligned bounding box.
+	 * This differs from SG_BBox::get() in that the produced box will be world axis aligned.
+	 * The maximum & minimum local points will be transformed *before* splitting to 8 points.
+	 * @param world a world transform to be applied.
+	 */
+	void getaa(MT_Point3 *box, const MT_Transform &world) const;
+
+};
+
+#endif /* __SG_BBOX_H__ */