CrystalSpace

Public API Reference

csgeom/sphere.h

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00001 /*
00002     Copyright (C) 2001 by Jorrit Tyberghein
00003 
00004     This library is free software; you can redistribute it and/or
00005     modify it under the terms of the GNU Library General Public
00006     License as published by the Free Software Foundation; either
00007     version 2 of the License, or (at your option) any later version.
00008 
00009     This library is distributed in the hope that it will be useful,
00010     but WITHOUT ANY WARRANTY; without even the implied warranty of
00011     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012     Library General Public License for more details.
00013 
00014     You should have received a copy of the GNU Library General Public
00015     License along with this library; if not, write to the Free
00016     Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
00017 */
00018 
00019 #ifndef __CS_SPHERE_H__
00020 #define __CS_SPHERE_H__
00021 
00029 #include "csextern.h"
00030 
00031 #include "cstypes.h"
00032 #include "csgeom/math3d.h"
00033 #include "csgeom/vector3.h"
00034 
00035 class csTransform;
00036 
00040 class CS_CRYSTALSPACE_EXPORT csSphere
00041 {
00042 private:
00043   csVector3 center;
00044   float radius;
00045 
00046 public:
00048   csSphere ()
00049   {
00050     center.Set (0, 0, 0);
00051     radius = 0;
00052   }
00053 
00055   csSphere (const csVector3& center, float radius)
00056   {
00057     csSphere::center = center;
00058     csSphere::radius = radius;
00059   }
00060 
00062   csSphere (const csSphere& s) { center = s.center; radius = s.radius; }
00063 
00065   inline csVector3& GetCenter () { return center; }
00067   inline const csVector3& GetCenter () const { return center; }
00069   inline void SetCenter (const csVector3& c) { center = c; }
00071   inline float GetRadius () const { return radius; }
00073   inline void SetRadius (float r) { radius = r; }
00074 
00076   void Union (const csVector3& ocenter, float oradius);
00077 
00079   friend CS_CRYSTALSPACE_EXPORT csSphere operator+ (const csSphere& s1, 
00080     const csSphere& s2);
00082   csSphere& operator+= (const csSphere& s)
00083   {
00084     Union (s.center, s.radius);
00085     return *this;
00086   }
00087   
00089   bool TestIntersect (const csSphere& sphere) const
00090   {
00091     float sqDist = csSquaredDist::PointPoint (center, sphere.center);
00092     return (sqDist - (csSquare (radius + sphere.radius))) < 0;
00093   }
00094 };
00095 
00099 class CS_CRYSTALSPACE_EXPORT csEllipsoid
00100 {
00101 private:
00102   csVector3 center;
00103   csVector3 radius;
00104 
00105 public:
00107   csEllipsoid ()
00108   {
00109     center.Set (0, 0, 0);
00110     radius.Set (0, 0, 0);
00111   }
00112 
00114   csEllipsoid (const csVector3& center, const csVector3& radius)
00115   {
00116     csEllipsoid::center = center;
00117     csEllipsoid::radius = radius;
00118   }
00119 
00121   csEllipsoid (const csEllipsoid& s) { center = s.center; radius = s.radius; }
00122 
00124   inline csVector3& GetCenter () { return center; }
00126   inline const csVector3& GetCenter () const { return center; }
00128   inline void SetCenter (const csVector3& c) { center = c; }
00130   inline csVector3& GetRadius () { return radius; }
00132   inline const csVector3& GetRadius () const { return radius; }
00134   inline void SetRadius (const csVector3& r) { radius = r; }
00135 };
00136 
00139 #endif // __CS_SPHERE_H__
00140 

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