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// llsphere.h
/**
* @file llsphere.cpp
* @author Andrew Meadows
* @brief Simple sphere implementation for basic geometric operations
*
* $LicenseInfo:firstyear=2001&license=internal$
*
* Copyright (c) 2001-2008, Linden Research, Inc.
*
* The following source code is PROPRIETARY AND CONFIDENTIAL. Use of
* this source code is governed by the Linden Lab Source Code Disclosure
* Agreement ("Agreement") previously entered between you and Linden
* Lab. By accessing, using, copying, modifying or distributing this
* software, you acknowledge that you have been informed of your
* obligations under the Agreement 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_SPHERE_H
#define LL_SPHERE_H
#include "stdtypes.h"
#include "v3math.h"
#include <iostream>
#include <vector>
class LLSphere
{
public:
LLSphere();
LLSphere( const LLVector3& center, F32 radius );
void set( const LLVector3& center, F32 radius );
void setCenter( const LLVector3& center );
void setRadius( F32 radius );
const LLVector3& getCenter() const;
F32 getRadius() const;
// returns TRUE if this sphere completely contains other_sphere
BOOL contains(const LLSphere& other_sphere) const;
// returns TRUE if this sphere overlaps other_sphere
BOOL overlaps(const LLSphere& other_sphere) const;
// returns overlap distance
// negative overlap is closest approach
F32 getOverlap(const LLSphere& other_sphere) const;
// removes any spheres that are contained in others
static void collapse(std::vector<LLSphere>& sphere_list);
// returns minimum sphere bounding sphere for a set of spheres
static LLSphere getBoundingSphere(const LLSphere& first_sphere, const LLSphere& second_sphere);
static LLSphere getBoundingSphere(const std::vector<LLSphere>& sphere_list);
bool operator==(const LLSphere& rhs) const;
friend std::ostream& operator<<( std::ostream& output_stream, const LLSphere& line );
protected:
LLVector3 mCenter;
F32 mRadius;
};
#endif
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