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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 #include "OgreMovablePlane.h"
    00034
    00035 namespace Ogre
    00036 {
    00039     enum ProjectionType
    00040     {
    00041         PT_ORTHOGRAPHIC,
    00042         PT_PERSPECTIVE
    00043     };
    00044
    00047     enum FrustumPlane
    00048     {
    00049         FRUSTUM_PLANE_NEAR   = 0,
    00050         FRUSTUM_PLANE_FAR    = 1,
    00051         FRUSTUM_PLANE_LEFT   = 2,
    00052         FRUSTUM_PLANE_RIGHT  = 3,
    00053         FRUSTUM_PLANE_TOP    = 4,
    00054         FRUSTUM_PLANE_BOTTOM = 5
    00055     };
    00056
    00061     class _OgreExport Frustum : public MovableObject, public Renderable
    00062     {
    00063     protected:
    00065         ProjectionType mProjType;
    00066
    00068         Radian mFOVy;
    00070         Real mFarDist;
    00072         Real mNearDist;
    00074         Real mAspect;
    00075
    00077         mutable Plane mFrustumPlanes[6];
    00078
    00080         mutable Quaternion mLastParentOrientation;
    00081         mutable Vector3 mLastParentPosition;
    00082
    00084         mutable Matrix4 mProjMatrix;
    00086         mutable Matrix4 mStandardProjMatrix;
    00088         mutable Matrix4 mViewMatrix;
    00090         mutable bool mRecalcFrustum;
    00092         mutable bool mRecalcView;
    00093
    00094
    00098         mutable Real mCoeffL[2], mCoeffR[2], mCoeffB[2], mCoeffT[2];
    00099
    00100
    00101
    00102
    00103         // Internal functions for calcs
    00104         virtual void updateFrustum(void) const;
    00105         virtual void updateView(void) const;
    00106         virtual bool isViewOutOfDate(void) const;
    00107         virtual bool isFrustumOutOfDate(void) const;
    00109         virtual void invalidateFrustum(void) const;
    00111         virtual void invalidateView(void) const;
    00112
    00114         static String msMovableType;
    00115
    00116         mutable AxisAlignedBox mBoundingBox;
    00117         mutable VertexData mVertexData;
    00118
    00119         Material* mMaterial;
    00120         mutable Vector3 mWorldSpaceCorners[8];
    00121
    00123         bool mReflect;
    00125         mutable Matrix4 mReflectMatrix;
    00127         mutable Plane mReflectPlane;
    00129         const MovablePlane* mLinkedReflectPlane;
    00131         mutable Plane mLastLinkedReflectionPlane;
    00132
    00134         bool mObliqueDepthProjection;
    00136         mutable Plane mObliqueProjPlane;
    00138         const MovablePlane* mLinkedObliqueProjPlane;
    00140         mutable Plane mLastLinkedObliqueProjPlane;
    00141
    00142
    00144         virtual const Vector3& getPositionForViewUpdate(void) const;
    00146         virtual const Quaternion& getOrientationForViewUpdate(void) const;
    00147
    00148
    00149     public:
    00150
    00151         Frustum();
    00152         virtual ~Frustum();
    00165         virtual void setFOVy(const Radian& fovy);
    00166 #ifndef OGRE_FORCE_ANGLE_TYPES
    00167         inline void setFOVy(Real fovy) {
    00168             setFOVy ( Angle(fovy) );
    00169         }
    00170 #endif//OGRE_FORCE_ANGLE_TYPES
    00171
    00174         virtual const Radian& getFOVy(void) const;
    00175
    00187         virtual void setNearClipDistance(Real nearDist);
    00188
    00191         virtual Real getNearClipDistance(void) const;
    00192
    00213         virtual void setFarClipDistance(Real farDist);
    00214
    00217         virtual Real getFarClipDistance(void) const;
    00218
    00227         virtual void setAspectRatio(Real ratio);
    00228
    00231         virtual Real getAspectRatio(void) const;
    00232
    00240         virtual const Matrix4& getProjectionMatrix(void) const;
    00252         virtual const Matrix4& getStandardProjectionMatrix(void) const;
    00253
    00256         virtual const Matrix4& getViewMatrix(void) const;
    00257
    00262         virtual const Plane& getFrustumPlane( unsigned short plane ) const;
    00263
    00275         virtual bool isVisible(const AxisAlignedBox& bound, FrustumPlane* culledBy = 0) const;
    00276
    00288         virtual bool isVisible(const Sphere& bound, FrustumPlane* culledBy = 0) const;
    00289
    00301         virtual bool isVisible(const Vector3& vert, FrustumPlane* culledBy = 0) const;
    00302
    00303
    00305         const AxisAlignedBox& getBoundingBox(void) const;
    00306
    00308         Real getBoundingRadius(void) const;
    00309
    00311         void _updateRenderQueue(RenderQueue* queue);
    00312
    00314         const String& getMovableType(void) const;
    00315
    00317         const String& getName(void) const;
    00318
    00320         void _notifyCurrentCamera(Camera* cam);
    00321
    00323         Material* getMaterial(void) const;
    00324
    00326         void getRenderOperation(RenderOperation& op);
    00327
    00329         void getWorldTransforms(Matrix4* xform) const;
    00330
    00332         const Quaternion& getWorldOrientation(void) const;
    00333
    00335         const Vector3& getWorldPosition(void) const;
    00336
    00338         Real getSquaredViewDepth(const Camera* cam) const;
    00339
    00341         const LightList& getLights(void) const;
    00342
    00349         virtual const Vector3* getWorldSpaceCorners(void) const;
    00350
    00353         virtual void setProjectionType(ProjectionType pt);
    00354
    00357         virtual ProjectionType getProjectionType(void) const;
    00358
    00364         virtual void enableReflection(const Plane& p);
    00373         virtual void enableReflection(const MovablePlane* p);
    00374
    00376         virtual void disableReflection(void);
    00377
    00379         virtual bool isReflected(void) const { return mReflect; }
    00381         virtual const Matrix4& getReflectionMatrix(void) const { return mReflectMatrix; }
    00383         virtual const Plane& getReflectionPlane(void) const { return mReflectPlane; }
    00384
    00394         virtual bool projectSphere(const Sphere& sphere,
    00395             Real* left, Real* top, Real* right, Real* bottom) const;
    00396
    00397
    00423         virtual void enableCustomNearClipPlane(const MovablePlane* plane);
    00444         virtual void enableCustomNearClipPlane(const Plane& plane);
    00446         virtual void disableCustomNearClipPlane(void);
    00447
    00448
    00450         static const Real INFINITE_FAR_PLANE_ADJUST;
    00451     };
    00452
    00453
    00454 }
    00455
    00456 #endif

Copyright © 2002-2003 by The OGRE Team
Last modified Sun Nov 28 19:48:24 2004