lugre_robrenderable.h

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/*
http://www.opensource.org/licenses/mit-license.php  (MIT-License)

Copyright (c) 2007 Lugre-Team

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/
#ifndef LUGRE_ROBRENDERABLE_H
#define LUGRE_ROBRENDERABLE_H
#undef min
#undef max
#include <OgrePrerequisites.h>
//#include <Ogre.h>
//#include <OgreRenderOperation.h>
#include <OgreSimpleRenderable.h>
#include <OgreCamera.h>
#include <OgreVector3.h>

namespace Lugre {

class cRobRenderOp { public :
    // set dynamic if the vertex data is rewritten frequently
    // bDynamic == true ->  Ogre::HardwareBuffer::Usage hbu=Ogre::HardwareBuffer::HBU_STATIC_WRITE_ONLY
    // bDynamic == false -> Ogre::HardwareBuffer::Usage hbu=Ogre::HardwareBuffer::HBU_DYNAMIC_WRITE_ONLY_DISCARDABLE
    // opType is one of OT_POINT_LIST,OT_LINE_LIST,OT_LINE_STRIP,OT_TRIANGLE_LIST,OT_TRIANGLE_STRIP,OT_TRIANGLE_FAN
    
    enum eVertexFormat {
        kVertexFormat_none,
        kVertexFormat_p,
        kVertexFormat_puv,
        kVertexFormat_pn,
        kVertexFormat_pnuv,
        kVertexFormat_pc,
        kVertexFormat_puvc,
        kVertexFormat_pnc,
        kVertexFormat_pnuvc,
    };
    Ogre::Vector3   mvAABMin;
    Ogre::Vector3   mvAABMax;
    bool            mbBoundingBoxEmpty;
    Ogre::Real      mfBoundingRadius;
    Ogre::RenderOperation*  mpRenderOp;
    Ogre::AxisAlignedBox*   mpBox;
    size_t          miVertexCapacity;
    size_t          miIndexCapacity;
    size_t          miVertexCount;
    size_t          miIndexCount;
    size_t          miVertexSize;
    bool            mbBufferIsDynamic; 
    bool            mbBufferIsReadable; 
    bool            mbDynamic;
    bool            mbReadable;
    bool            mbKeepOldIndices;
    eVertexFormat   miVertexFormat;
    size_t          miReceivedVertices;
    size_t          miReceivedIndices;
    Ogre::RenderSystem* mpRenderSys; // for color conversion
    
    char*           mVertexWritePtr;
    unsigned short* mIndexWritePtr;
    Ogre::HardwareVertexBufferSharedPtr mHWVBuf;
    Ogre::HardwareIndexBufferSharedPtr  mHWIBuf;
    
    cRobRenderOp(Ogre::RenderOperation* pRenderOp=0,Ogre::AxisAlignedBox* pBox=0);
    virtual ~cRobRenderOp();
    
    void    Begin   (const size_t iVertexCount,const size_t iIndexCount=0,const bool bDynamic=false,const bool bKeepOldIndices=false,
                        const Ogre::RenderOperation::OperationType opType=Ogre::RenderOperation::OT_TRIANGLE_LIST,const bool bReadable=false);
    void    Vertex  (const Ogre::Vector3& p);
    void    Vertex  (const Ogre::Vector3& p,const Ogre::Real u,const Ogre::Real v);
    void    Vertex  (const Ogre::Vector3& p,const Ogre::Vector3& n);
    void    Vertex  (const Ogre::Vector3& p,const Ogre::Vector3& n,const Ogre::Real u,const Ogre::Real v);
    void    Vertex  (const Ogre::Vector3& p,const Ogre::ColourValue& c);
    void    Vertex  (const Ogre::Vector3& p,const Ogre::Real u,const Ogre::Real v,const Ogre::ColourValue& c);
    void    Vertex  (const Ogre::Vector3& p,const Ogre::Vector3& n,const Ogre::ColourValue& c);
    void    Vertex  (const Ogre::Vector3& p,const Ogre::Vector3& n,const Ogre::Real u,const Ogre::Real v,const Ogre::ColourValue& c);
    void    Index   (const int i);
    void    Index   (const int i,const int j,const int k);
    void    End     ();
    void    SkipVertices    (const size_t iNum=1);
    void    SkipIndices     (const size_t iNum=1);
    void    AddToMesh       (Ogre::MeshPtr pMesh, const std::string& sMatName);
    void    ConvertToMesh   (const std::string& sMeshName,const std::string& sMatName);
    

    Ogre::Real*     StartCustomWriter   (const Ogre::Vector3& vBoundsMin,const Ogre::Vector3& vBoundsMax);
    
    void            SetVertexFormatFromEnum     (const eVertexFormat miVertexFormat,const int iNumTexCoordsSets=1); 
    
    Ogre::VertexDeclaration*    GetVertexDecl   ();
    
    void            _StartWrite                     (const bool bVertexFormatChanged); 
    void            _AllocateIndexBufferIfNeeded    (); 
    Ogre::Real*     PrepareAddVertex    (const eVertexFormat miVertexFormat,const Ogre::Vector3& p);

    static Ogre::Real GetMaxZ ();
};

class cRobSimpleRenderable : public cRobRenderOp,  public Ogre::SimpleRenderable { public :
    cRobSimpleRenderable();
    virtual ~cRobSimpleRenderable();
    
    void    ConvertToMesh   (const std::string& sMeshName);
    void    AddToMesh       (const std::string& sMeshName);
    void    AddToMesh       (Ogre::MeshPtr pMesh);
    virtual Ogre::Real getBoundingRadius(void) const;
    virtual Ogre::Real getSquaredViewDepth(const Ogre::Camera* cam) const;
};


};

#endif