Imported existing code

indra/newview/llbbox.h

@@ -0,0 +1,105 @@
+/** 
+ * @file llbbox.h
+ * @brief General purpose bounding box class
+ *
+ * $LicenseInfo:firstyear=2001&license=viewergpl$
+ * 
+ * Copyright (c) 2001-2009, Linden Research, Inc.
+ * 
+ * Second Life Viewer Source Code
+ * The source code in this file ("Source Code") is provided by Linden Lab
+ * to you under the terms of the GNU General Public License, version 2.0
+ * ("GPL"), unless you have obtained a separate licensing agreement
+ * ("Other License"), formally executed by you and Linden Lab.  Terms of
+ * the GPL can be found in doc/GPL-license.txt in this distribution, or
+ * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
+ * 
+ * There are special exceptions to the terms and conditions of the GPL as
+ * it is applied to this Source Code. View the full text of the exception
+ * in the file doc/FLOSS-exception.txt in this software distribution, or
+ * online at
+ * http://secondlifegrid.net/programs/open_source/licensing/flossexception
+ * 
+ * By copying, modifying or distributing this software, you acknowledge
+ * that you have read and understood your obligations described above,
+ * and agree to abide by those obligations.
+ * 
+ * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
+ * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
+ * COMPLETENESS OR PERFORMANCE.
+ * $/LicenseInfo$
+ */
+
+#ifndef LL_BBOX_H
+#define LL_BBOX_H
+
+#include "v3math.h"
+#include "llquaternion.h"
+
+// Note: "local space" for an LLBBox is defined relative to agent space in terms of
+// a translation followed by a rotation.  There is no scale term since the LLBBox's min and 
+// max are not necessarily symetrical and define their own extents.
+
+class LLBBox
+{
+public:
+	LLBBox() {mEmpty = TRUE;}
+	LLBBox( const LLVector3& pos_agent,
+		const LLQuaternion& rot,
+		const LLVector3& min_local,
+		const LLVector3& max_local )
+		:
+		mMinLocal( min_local ), mMaxLocal( max_local ), mPosAgent(pos_agent), mRotation( rot), mEmpty( TRUE )
+		{}
+
+	// Default copy constructor is OK.
+
+	const LLVector3&	getPositionAgent() const			{ return mPosAgent; }
+	const LLQuaternion&	getRotation() const					{ return mRotation; }
+
+	const LLVector3&	getMinLocal() const					{ return mMinLocal; }
+	void				setMinLocal( const LLVector3& min )	{ mMinLocal = min; }
+
+	const LLVector3&	getMaxLocal() const					{ return mMaxLocal; }
+	void				setMaxLocal( const LLVector3& max )	{ mMaxLocal = max; }
+
+	LLVector3			getCenterLocal() const				{ return (mMaxLocal - mMinLocal) * 0.5f + mMinLocal; }
+	LLVector3			getCenterAgent() const				{ return localToAgent( getCenterLocal() ); }
+
+	LLVector3			getExtentLocal() const				{ return mMaxLocal - mMinLocal; }
+
+	BOOL				containsPointLocal(const LLVector3& p) const;
+	BOOL				containsPointAgent(const LLVector3& p) const;
+
+	BOOL				intersects(const LLBBox& b) const;
+
+	void				addPointAgent(LLVector3 p);
+	void				addBBoxAgent(const LLBBox& b);
+	
+	void				addPointLocal(const LLVector3& p);
+	void				addBBoxLocal(const LLBBox& b) {	addPointLocal( b.mMinLocal ); addPointLocal( b.mMaxLocal ); }
+
+	void				expand( F32 delta );
+
+	LLVector3			localToAgent( const LLVector3& v ) const;
+	LLVector3			agentToLocal( const LLVector3& v ) const;
+
+	// Changes rotation but not position
+	LLVector3			localToAgentBasis(const LLVector3& v) const;
+	LLVector3			agentToLocalBasis(const LLVector3& v) const;
+
+
+//	friend LLBBox operator*(const LLBBox& a, const LLMatrix4& b);
+
+private:
+	LLVector3			mMinLocal;
+	LLVector3			mMaxLocal;
+	LLVector3			mPosAgent;  // Position relative to Agent's Region
+	LLQuaternion		mRotation;
+	BOOL				mEmpty;		// Nothing has been added to this bbox yet
+};
+
+//LLBBox operator*(const LLBBox &a, const LLMatrix4 &b);
+
+
+#endif  // LL_BBOX_H