source: GTP/trunk/App/Demos/Illum/EnvMap/Mesh.h @ 1488

#pragma once
/**
        \brief Encapsulates a mesh of .X format. 
        \brief Adds helper functions for easier scaling, moving, texturing
        \see OptimizedMesh DirectX SDK Sample
*/
class Mesh
{
        ID3DXMesh* pMesh;                                       ///< THE .X MESH OBJECT
        IDirect3DTexture9* pMeshTexture;

        DWORD numMaterials;
        D3DXVECTOR3 originalSize; 
        float originalDiameter;
        float preferredDiameter;
        D3DXVECTOR3 containerSize;

        HRESULT hr;
        D3DXVECTOR3 position;

public:

        /// Loads the specified .X file
        /// \param fileName name of the mesh file
        /// \param texFileName name of the texture file
        /// \param preferredDiameter final size of the mesh
        /// \param position initial position of the mesh.
        /// During rendering, use GetMeshScale() to get the appropriate scaling factor 
        /// to achieve the preferred mesh size.
        Mesh(LPCWSTR fileName, LPCWSTR texFileName, float preferredDiameter, D3DXVECTOR3 position);
        /// Destructor. Deletes dynamically created resources.
        ~Mesh();

        /// \brief LOADS THE SPECIFIED .X FILE
        /// Eliminates mesh offset (centers the mesh to the origin) 
        /// and determines mesh size (#originalSize, #originalDiameter).
        void Load(LPCWSTR fileName); 
        /// Adds the specified offset to the mesh position.
        /// \param bContainerOnly indicates whether the object can leave the room
        void Move(D3DXVECTOR3 offset, bool bContainerOnly = false);
        /// Draws the mesh. Before drawing, use GetMeshScale() to get the appropriate scaling factor.
        HRESULT Draw();
        /// current mesh size   
        D3DXVECTOR3 GetMeshSize()   { return GetMeshScale() * originalSize; }
        /// current mesh scale
        float GetMeshScale()            { return preferredDiameter / originalDiameter; }
        /// current mesh position
        D3DXVECTOR3 GetMeshPosition()   { return position; }
        /// mesh texture
        IDirect3DTexture9* GetTexture()         { return pMeshTexture; }

        /// Sets the size of the encapsulating room.
        void SetContainerSize(D3DXVECTOR3 size) { containerSize = size; }
        /// Sets mesh position.
        void SetMeshPosition(D3DXVECTOR3 pos)   { position = pos; }
        /// Sets preferred mesh size (diameter).
        void SetPreferredDiameter(float d) { 
                preferredDiameter = d;
                Move(D3DXVECTOR3(0,0,0),true);          // to stay inside the room
        }

protected:
        /// Calculates mesh size and updates #originalSize and #originalDiameter.
        HRESULT CalculateMeshSize( );
};