raModel.cpp

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#include "..\include\raMain.h"

namespace System
{
    raModel::raModel(raSmartPointer<raDirectX> dx, LPCSTR FileName) : raEntity(dx.get(), NULL, false, false, 0)
    {
        m_Modelfilename = FileName;
    }
    raModel::~raModel()
    {
        m_pVertices = NULL;
        m_pIndices = NULL;
    }
    bool raModel::CreateMesh()
    {
        HANDLE hFile = CreateFile((std::string("raModel\\") +m_Modelfilename).c_str(), FILE_READ_DATA, FILE_SHARE_READ, NULL,
            OPEN_EXISTING, FILE_FLAG_SEQUENTIAL_SCAN, NULL);

        //Datei Größe
        LARGE_INTEGER FileSize;
        GetFileSizeEx(hFile, &FileSize);
        UINT nBytes = FileSize.LowPart;
        m_pMeshData = new BYTE[nBytes];

        // Daten lesen
        DWORD nBytesRead;
        ReadFile(hFile, m_pMeshData, nBytes, &nBytesRead, NULL);
        CloseHandle(hFile);

        assert(nBytesRead > 0);

        RAMESH_HEADER * pMeshHeader = (RAMESH_HEADER*)m_pMeshData;
        m_nIndices                  = 3 * pMeshHeader->NumTriangles;
        m_nVertices                 = pMeshHeader->NumVertices;
        m_numMaterials              = pMeshHeader->NumMaterials;

        m_pVertices                 = (VERTEXPOSITIONNORMALTEXTURED*)(pMeshHeader + 1);
        m_pIndices                  = (UINT16*)(((VERTEXPOSITIONNORMALTEXTURED*)m_pVertices) +
                                        m_nVertices);
        //...
        //Materialien
        m_numSubsets = m_numMaterials;
        m_pSubsets = new SDKMESH_SUBSET[m_numSubsets];
        m_pMaterials = new raMaterial* [m_numMaterials];

        raArray<UINT> *pSubsets;
        pSubsets = new raArray<UINT>[m_numSubsets];

        UINT* pNumChars = (UINT*) ( m_pIndices + m_nIndices);
        for(UINT matNo = 0; matNo < m_numMaterials; matNo++)
        {
            m_pSubsets[matNo].MaterialID = matNo;
            m_pSubsets[matNo].PrimitiveType = D3D11_PRIMITIVE_TOPOLOGY_TRIANGLELIST;
            if(*pNumChars > 0)
            {
                CHAR * pTextureFileName = (CHAR*)(pNumChars + 1);
                pTextureFileName[*pNumChars] = (CHAR)0;
                m_pMaterials[matNo] = new raTexturedMaterial(m_dx.get(), "raEffects\\MyEngine.fx", "RenderScene",
                    (std::string("raTextur\\") + pTextureFileName).c_str());
                pNumChars = (UINT*)(pTextureFileName + *pNumChars);
            }
            else
            {
                m_pMaterials[matNo] = new raMaterial(m_dx.get(), "raEffects\\MyEngine.fx", "RenderWithMaterialColor");
                pNumChars += 1;
            }
        }
        // Subsets
        UINT16 *pFaceIndexes = (UINT16*)pNumChars;
        int idx = 0;
        for(UINT i = 0; i < pMeshHeader->NumTriangles; i++)
        {
            for(int j = 0; j < 3; i++)
            {
                pSubsets[*pFaceIndexes].Add(m_pIndices[idx++]);
            }
            pFaceIndexes++;
        }
        //Indices Umsotieren
        idx = 0;
        for(UINT matNo=0; matNo < m_numMaterials; matNo++)
        {
            m_pSubsets[matNo].MaterialID = matNo;
            m_pSubsets[matNo].IndexStart = idx;

            m_pSubsets[matNo].IndexCount = pSubsets[matNo].GetSize();
            for(int i = 0; i < pSubsets[matNo].GetSize(); i++)
            {
                m_pIndices[idx++] = pSubsets[matNo][i];
            }
        }
        delete[] pSubsets;
        raEntity::CreateMesh();
        delete[] m_pMeshData;

        return true;
    }
}