Geometry - usage

int WINAPI WinMain(HINSTANCE hInstance,
                   HINSTANCE hPrevInstance,
                   LPSTR lpCmdLine,
                   int nCmdShow){

   registerWindowClass("wc1", hInstance);

   HWND hWnd = CreateWindowEx(0,
                              "wc1",
                              "test",
                              FULL_SCREEN ?
                                 WS_EX_TOPMOST | WS_POPUP :
                                 WS_OVERLAPPEDWINDOW,
                              0, 0,
                              SCREEN_WIDTH, SCREEN_HEIGHT,
                              0,
                              0,
                              hInstance, //application handle
                              0);

   ShowWindow(hWnd, nCmdShow);

   d3dInit(hWnd);

   //create vertices
   CUSTOMVERTEX vertices[] = {
   { -5, 0, -5, 0x804000 },
   { -5, 0,  5, 0x008000 }, //ground1
   {  5, 0,  5, 0x804000 },

   {  5, 0,  5, 0x804000 },
   {  5, 0, -5, 0x008000 }, //ground2
   { -5, 0, -5, 0x804000 },


   {  0,  3, 0, 0x0000ff },
   { -3, -3, 0, 0xff0000 }, //triangle1
   {  3, -3, 0, 0x00ff00 },

   {  0,  3, 0, 0x0000ff },
   {  3, -3, 0, 0x00ff00 }, //triangle2
   { -3, -3, 0, 0xff0000 },
   };


   Geometry g;
   g.addShape(vertices,   6); //ground
   g.addShape(vertices+6, 6); //colorful triangle (two-sided)
   g.pushBuffer();


   while (handleEvents()){
      d3ddev->Clear(0, NULL, D3DCLEAR_TARGET, D3DCOLOR_XRGB(0, 0, 0), 1.0f, 0); //back buffer
      d3ddev->Clear(0, NULL, D3DCLEAR_ZBUFFER, D3DCOLOR_XRGB(0, 0, 0), 1.0f, 0); //depth buffer

      d3ddev->BeginScene();

      d3ddev->SetFVF(CUSTOMFVF);
      d3ddev->SetStreamSource(0, v_buffer, 0, sizeof(CUSTOMVERTEX));

      //view transform matrix
      D3DXMATRIX matView;
      D3DXMatrixLookAtLH(&matView,
                         &D3DXVECTOR3 (0, 5, 10.0f), //camera
                         &D3DXVECTOR3 (0.0f, 0.0f, 0.0f), //looking at
                         &D3DXVECTOR3 (0.0f, 1.0f, 0.0f)); //up
      d3ddev->SetTransform(D3DTS_VIEW, &matView);

      //projection transform matrix
      D3DXMATRIX matProjection;
      D3DXMatrixPerspectiveFovLH(&matProjection,
                                 D3DXToRadian(45), //horizontal FOV
                                 (FLOAT)SCREEN_WIDTH / (FLOAT)SCREEN_HEIGHT, //aspect ratio
                                 1.0f, //near
                                 100.0f); //far
      d3ddev->SetTransform(D3DTS_PROJECTION, &matProjection);

      g.render();

      d3ddev->EndScene();
      d3ddev->Present(NULL, NULL, NULL, NULL);
   }

   d3dQuit();
   return 0;
}