78 lines
2.3 KiB
C++
78 lines
2.3 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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* $LicenseInfo:firstyear=2007&license=viewerlgpl$
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* Second Life Viewer Source Code
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* Copyright (C) 2010, Linden Research, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation;
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* version 2.1 of the License only.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
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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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