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OgreFrustum.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 © 2000-2003 The OGRE Team
00008 Also see acknowledgements in Readme.html
00009 
00010 This program is free software; you can redistribute it and/or modify it under
00011 the terms of the GNU Lesser General Public License as published by the Free Software
00012 Foundation; either version 2 of the License, or (at your option) any later
00013 version.
00014 
00015 This program is distributed in the hope that it will be useful, but WITHOUT
00016 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
00017 FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
00018 
00019 You should have received a copy of the GNU Lesser General Public License along with
00020 this program; if not, write to the Free Software Foundation, Inc., 59 Temple
00021 Place - Suite 330, Boston, MA 02111-1307, USA, or go to
00022 http://www.gnu.org/copyleft/lesser.txt.
00023 -----------------------------------------------------------------------------
00024 */
00025 #ifndef __Frustum_H__
00026 #define __Frustum_H__
00027 
00028 #include "OgrePrerequisites.h"
00029 #include "OgreMovableObject.h"
00030 #include "OgreRenderable.h"
00031 #include "OgreAxisAlignedBox.h"
00032 #include "OgreVertexIndexData.h"
00033 
00034 namespace Ogre
00035 {
00038     enum FrustumPlane
00039     {
00040         FRUSTUM_PLANE_NEAR   = 0,
00041         FRUSTUM_PLANE_FAR    = 1,
00042         FRUSTUM_PLANE_LEFT   = 2,
00043         FRUSTUM_PLANE_RIGHT  = 3,
00044         FRUSTUM_PLANE_TOP    = 4,
00045         FRUSTUM_PLANE_BOTTOM = 5
00046     };
00047 
00052     class _OgreExport Frustum : public MovableObject, public Renderable
00053     {
00054     protected:
00056         Real mFOVy;
00058         Real mFarDist;
00060         Real mNearDist;
00062         Real mAspect;
00063 
00065         mutable Plane mFrustumPlanes[6];
00066 
00068         mutable Quaternion mLastParentOrientation;
00069         mutable Vector3 mLastParentPosition;
00070 
00072         mutable Matrix4 mProjMatrix;
00074         mutable Matrix4 mStandardProjMatrix;
00076         mutable Matrix4 mViewMatrix;
00078         mutable bool mRecalcFrustum;
00080         mutable bool mRecalcView;
00081 
00082 
00086         mutable Real mCoeffL[2], mCoeffR[2], mCoeffB[2], mCoeffT[2];
00087 
00088 
00089         // Internal functions for calcs
00090         void updateFrustum(void) const;
00091         void updateView(void) const;
00092         bool isViewOutOfDate(void) const;
00093         bool isFrustumOutOfDate(void) const;
00094 
00096         static String msMovableType;
00097 
00098         mutable AxisAlignedBox mBoundingBox;
00099         mutable VertexData mVertexData;
00100 
00101         Material* mMaterial;
00102 
00103 
00104     public:
00105 
00106         Frustum();
00107         virtual ~Frustum();
00120         void setFOVy(Real fovy);
00121 
00124         Real getFOVy(void) const;
00125 
00137         void setNearClipDistance(Real nearDist);
00138 
00141         Real getNearClipDistance(void) const;
00142 
00159         void setFarClipDistance(Real farDist);
00160 
00163         Real getFarClipDistance(void) const;
00164 
00173         void setAspectRatio(Real ratio);
00174 
00177         Real getAspectRatio(void) const;
00178 
00186         const Matrix4& getProjectionMatrix(void) const;
00198         const Matrix4& getStandardProjectionMatrix(void) const;
00199 
00202         const Matrix4& getViewMatrix(void) const;
00203 
00208         const Plane& getFrustumPlane( FrustumPlane plane );
00209 
00221         bool isVisible(const AxisAlignedBox& bound, FrustumPlane* culledBy = 0);
00222 
00234         bool isVisible(const Sphere& bound, FrustumPlane* culledBy = 0);
00235 
00247         bool isVisible(const Vector3& vert, FrustumPlane* culledBy = 0);
00248 
00249 
00251         const AxisAlignedBox& getBoundingBox(void) const;
00252 
00254         Real getBoundingRadius(void) const;
00255 
00257         void _updateRenderQueue(RenderQueue* queue);
00258 
00260         const String& getMovableType(void) const;
00261 
00263         const String& getName(void) const;
00264 
00266         void _notifyCurrentCamera(Camera* cam);
00267 
00269         Material* getMaterial(void) const;
00270 
00272         void getRenderOperation(RenderOperation& op);
00273 
00275         void getWorldTransforms(Matrix4* xform) const;
00276 
00278         const Quaternion& getWorldOrientation(void) const;
00279 
00281         const Vector3& getWorldPosition(void) const;
00282 
00284         Real getSquaredViewDepth(const Camera* cam) const;
00285 
00287         const LightList& getLights(void) const;
00288 
00289 
00290     };
00291 
00292 
00293 }
00294 
00295 #endif 

Copyright © 2002-2003 by The OGRE Team
Last modified Wed Jan 21 00:10:11 2004