Terrain问题

GDE::UINT32
CGround::GenerateIndices(GDE::UINT32** ppIndices)
{
    GDE::UINT32 numTriangles = (kiWidth * 2) * (kiLength * 2);
    GDE::UINT32 numIndices = numTriangles * 3;
   

    *ppIndices = new GDE::UINT32[numIndices];

    GDE::UINT32 index = 0;
    GDE::UINT32 startVertex = 0;
    for(int z = 0; z < kiLength; ++z)
    {
        for(int x = 0; x < kiWidth; ++x)
        {
            (*ppIndices)[index] = startVertex + 0;
            (*ppIndices)[index + 1] = startVertex + 1;
            (*ppIndices)[index + 2] = startVertex + 2;

            index += 3;
            (*ppIndices)[index] = startVertex + 1;
            (*ppIndices)[index + 1] = startVertex + kiWidth + 1;
            (*ppIndices)[index + 2] = startVertex + kiWidth;

            index += 3;
            ++startVertex;
        }
        ++startVertex;
    }
    return(startVertex);
}

void
CGround::GenerateVertices(SFVertex** ppVertices)
{
    *ppVertices = new SFVertex[kiWidth * kiLength];
    GDE::UINT32 count = 0;
    FLOAT32 WorldZPos = 0.0f;
    for(int z = 0; z < kiLength; ++z)
    {
        FLOAT32 WorldXPos = 0.0f;
        for(int x = 0; x < kiWidth; ++x)
        {
            (*ppVertices)[count] = SFVertex(WorldXPos, 0.0f, WorldZPos, 0xFF000000);
            ++count;

            WorldXPos += 8.0f;
        }
        WorldZPos += 8.0f;
    }
}