MIP 를 만들어보자.

void CVolumeRendererDoc::OnSlicerenderingMip()
{
	// TODO: 여기에 명령 처리기 코드를 추가합니다.
	int img_width = m_pVolume->getWidth();
	int img_height = m_pVolume->getHeight();
	int img_depth = m_pVolume->getDepth();

	shared_ptr<unsigned char> Mip_Image =
		shared_ptr<unsigned char>(new unsigned char[img_width*img_height]);
	memset(Mip_Image.get(), 0, sizeof(unsigned char)*img_width*img_height);

    // 평면을 깊이 z 만큼 순회하면서 최대값을 찾는다.
	for (int z = 0; z < img_depth; z++)
	{
		for (int j = 0; j < img_height; j++)
		{
			for (int i = 0; i < img_width; i++)
			{
                // 현재 MIP 값과 voxel 값을 비교하여 큰 값을 MIP 에 저장한다.
				Mip_Image.get()[img_width * j + i] =
					__max(Mip_Image.get()[img_width * j + i],
						m_pVolume->getVoxel(i, j, z));
			}
		}
	}

	CVolumeRendererView* pView =
		(CVolumeRendererView*)((CMainFrame*)(AfxGetApp()->m_pMainWnd))->GetActiveView();

	pView->SetDrawImage(Mip_Image.get(), img_width, img_height, 1);

	pView->OnInitialUpdate();
}