OgrePlaneBoundedVolume.h
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    00001 /*
    00002 -----------------------------------------------------------------------------
    00003 This source file is part of OGRE
    00004 (Object-oriented Graphics Rendering Engine)
    00005 For the latest info, see http://www.ogre3d.org/
    00006
    00007 Copyright (c) 2000-2012 Torus Knot Software Ltd
    00008
    00009 Permission is hereby granted, free of charge, to any person obtaining a copy
    00010 of this software and associated documentation files (the "Software"), to deal
    00011 in the Software without restriction, including without limitation the rights
    00012 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
    00013 copies of the Software, and to permit persons to whom the Software is
    00014 furnished to do so, subject to the following conditions:
    00015
    00016 The above copyright notice and this permission notice shall be included in
    00017 all copies or substantial portions of the Software.
    00018
    00019 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    00020 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    00021 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    00022 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    00023 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    00024 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    00025 THE SOFTWARE.
    00026 -----------------------------------------------------------------------------
    00027 */
    00028 #ifndef __PlaneBoundedVolume_H_
    00029 #define __PlaneBoundedVolume_H_
    00030
    00031 // Precompiler options
    00032 #include "OgrePrerequisites.h"
    00033 #include "OgreAxisAlignedBox.h"
    00034 #include "OgreSphere.h"
    00035 #include "OgreMath.h"
    00036 #include "OgrePlane.h"
    00037
    00038 namespace Ogre {
    00039
    00048     class _OgreExport PlaneBoundedVolume
    00049     {
    00050     public:
    00051         typedef vector<Plane>::type PlaneList;
    00053         PlaneList planes;
    00054         Plane::Side outside;
    00055
    00056         PlaneBoundedVolume() :outside(Plane::NEGATIVE_SIDE) {}
    00058         PlaneBoundedVolume(Plane::Side theOutside)
    00059             : outside(theOutside) {}
    00060
    00064         inline bool intersects(const AxisAlignedBox& box) const
    00065         {
    00066             if (box.isNull()) return false;
    00067             if (box.isInfinite()) return true;
    00068
    00069             // Get centre of the box
    00070             Vector3 centre = box.getCenter();
    00071             // Get the half-size of the box
    00072             Vector3 halfSize = box.getHalfSize();
    00073
    00074             PlaneList::const_iterator i, iend;
    00075             iend = planes.end();
    00076             for (i = planes.begin(); i != iend; ++i)
    00077             {
    00078                 const Plane& plane = *i;
    00079
    00080                 Plane::Side side = plane.getSide(centre, halfSize);
    00081                 if (side == outside)
    00082                 {
    00083                     // Found a splitting plane therefore return not intersecting
    00084                     return false;
    00085                 }
    00086             }
    00087
    00088             // couldn't find a splitting plane, assume intersecting
    00089             return true;
    00090
    00091         }
    00095         inline bool intersects(const Sphere& sphere) const
    00096         {
    00097             PlaneList::const_iterator i, iend;
    00098             iend = planes.end();
    00099             for (i = planes.begin(); i != iend; ++i)
    00100             {
    00101                 const Plane& plane = *i;
    00102
    00103                 // Test which side of the plane the sphere is
    00104                 Real d = plane.getDistance(sphere.getCenter());
    00105                 // Negate d if planes point inwards
    00106                 if (outside == Plane::NEGATIVE_SIDE) d = -d;
    00107
    00108                 if ( (d - sphere.getRadius()) > 0)
    00109                     return false;
    00110             }
    00111
    00112             return true;
    00113
    00114         }
    00115
    00120         inline std::pair<bool, Real> intersects(const Ray& ray)
    00121         {
    00122             return Math::intersects(ray, planes, outside == Plane::POSITIVE_SIDE);
    00123         }
    00124
    00125     };
    00126
    00127     typedef vector<PlaneBoundedVolume>::type PlaneBoundedVolumeList;
    00128
    00132 }
    00133
    00134 #endif
    00135

Copyright © 2012 Torus Knot Software Ltd
This work is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License.
Last modified Sun Sep 2 2012 07:27:22