84 lines
2.6 KiB
C++
84 lines
2.6 KiB
C++
// llsphere.h
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/**
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* @file llsphere.cpp
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* @author Andrew Meadows
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* @brief Simple sphere implementation for basic geometric operations
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*
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* $LicenseInfo:firstyear=2007&license=viewergpl$
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*
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* Copyright (c) 2007-2009, Linden Research, Inc.
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*
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* Second Life Viewer Source Code
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* The source code in this file ("Source Code") is provided by Linden Lab
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* to you under the terms of the GNU General Public License, version 2.0
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* ("GPL"), unless you have obtained a separate licensing agreement
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* ("Other License"), formally executed by you and Linden Lab. Terms of
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* the GPL can be found in doc/GPL-license.txt in this distribution, or
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* online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
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*
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* There are special exceptions to the terms and conditions of the GPL as
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* it is applied to this Source Code. View the full text of the exception
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* in the file doc/FLOSS-exception.txt in this software distribution, or
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* online at
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* http://secondlifegrid.net/programs/open_source/licensing/flossexception
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*
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* By copying, modifying or distributing this software, you acknowledge
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* that you have read and understood your obligations described above,
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* and agree to abide by those obligations.
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*
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* ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
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* WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
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* COMPLETENESS OR PERFORMANCE.
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* $/LicenseInfo$
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*/
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#ifndef LL_SPHERE_H
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#define LL_SPHERE_H
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#include "stdtypes.h"
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#include "v3math.h"
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#include <iostream>
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#include <vector>
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class LLSphere
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{
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public:
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LLSphere();
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LLSphere( const LLVector3& center, F32 radius );
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void set( const LLVector3& center, F32 radius );
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void setCenter( const LLVector3& center );
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void setRadius( F32 radius );
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const LLVector3& getCenter() const;
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F32 getRadius() const;
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// returns TRUE if this sphere completely contains other_sphere
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BOOL contains(const LLSphere& other_sphere) const;
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// returns TRUE if this sphere overlaps other_sphere
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BOOL overlaps(const LLSphere& other_sphere) const;
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// returns overlap distance
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// negative overlap is closest approach
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F32 getOverlap(const LLSphere& other_sphere) const;
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// removes any spheres that are contained in others
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static void collapse(std::vector<LLSphere>& sphere_list);
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// returns minimum sphere bounding sphere for a set of spheres
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static LLSphere getBoundingSphere(const LLSphere& first_sphere, const LLSphere& second_sphere);
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static LLSphere getBoundingSphere(const std::vector<LLSphere>& sphere_list);
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bool operator==(const LLSphere& rhs) const;
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friend std::ostream& operator<<( std::ostream& output_stream, const LLSphere& line );
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protected:
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LLVector3 mCenter;
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F32 mRadius;
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};
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#endif
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