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# D3DGeometryItem.h

    #ifndef D3DGeometryItem_h_
    #define D3DGeometryItem_h_

    #if defined(D3D9_SUPPORTED)

    #include <maya/MDagPath.h>
    #include <maya/MObjectHandle.h>
    #include <maya/MMessage.h> // For monitoring geometry list nodes
    #include <list>

        #define WIN32_LEAN_AND_MEAN
        #include <d3d9.h>
        #include <d3dx9.h>

    //
    // A class to manage populate and render D3D buffers representing Maya geometry
    //
    class D3DGeometry
    {
    public:
        D3DGeometry()
            : VertexBuffer( NULL), IndexBuffer( NULL), FVF( 0), Stride( 0), NumVertices( 0), NumIndices( 0)
        {
        }
        ~D3DGeometry()
        {
            Release();
        }
        bool Populate( const MDagPath& dagPath, LPDIRECT3DDEVICE9 D3D);
        bool Render( LPDIRECT3DDEVICE9 D3D)
        {
            D3D->SetStreamSource( 0, VertexBuffer, 0, Stride );
            D3D->SetFVF( FVF);
            D3D->SetIndices( IndexBuffer);
            D3D->DrawIndexedPrimitive( D3DPT_TRIANGLELIST, 0, 0, NumVertices, 0, NumIndices / 3);
            return true;
        }
        void Release()
        {
            if( VertexBuffer)
                VertexBuffer->Release();
            if( IndexBuffer)
                IndexBuffer->Release();
            VertexBuffer = NULL;
            IndexBuffer = NULL;
        }

    private:
        LPDIRECT3DVERTEXBUFFER9 VertexBuffer;
        LPDIRECT3DINDEXBUFFER9  IndexBuffer;
        unsigned int            NumVertices;
        unsigned int            NumIndices;
        DWORD                   FVF;
        int                     Stride;
    };

    // Geometry item use to associate a D3DGeometry with Maya geometry
    //
    struct GeometryItem {
        MDagPath                m_objectPath;
        D3DGeometry*            m_objectGeometry;
        MCallbackId             m_objectDeleteMonitor;
        MCallbackId             m_objectDirtyMonitor;
        MCallbackId             m_objectChangeMonitor;
    };
    typedef std::list<GeometryItem*> GeometryItemList;

    #endif

    #endif /* D3DGeometryItem_h_ */

    //-
    // ==========================================================================
    // Copyright 1995,2006,2008 Autodesk, Inc. All rights reserved.
    //
    // Use of this software is subject to the terms of the Autodesk
    // license agreement provided at the time of installation or download,
    // or which otherwise accompanies this software in either electronic
    // or hard copy form.
    // ==========================================================================
    //+