才接触VTK，感觉有点迷茫啊，做了一个面绘制的，还算凑合。改了一个体绘制，读取的jpg灰度的图片切片序列，结果就是不透明，整个就是一个黑块，搞不懂啊？应该怎么改啊？求大佬帮帮忙。万能的吧主啊。@rabbitbride

二楼贴代码
int main(int argc, char *argv[])
{
vtkSmartPointer<vtkJPEGReader>reader = vtkSmartPointer<vtkJPEGReader>::New();
reader->SetDataScalarTypeToUnsignedChar();
reader->SetFileDimensionality(3);
reader->SetFilePrefix("F://Data/JPG3/");
reader->SetFileNameSliceSpacing(1);
reader->SetFilePattern("%s%d.jpg");
reader->SetDataExtent(0, 379, 0, 475, 1, 54);
reader->SetDataSpacing(1, 1, 5);
reader->Update();
vtkSmartPointer<vtkFixedPointVolumeRayCastMapper> volumeMapper =
vtkSmartPointer<vtkFixedPointVolumeRayCastMapper>::New();
volumeMapper->SetInputData(reader->GetOutput());
//设置光线采样距离
//volumeMapper->SetSampleDistance(volumeMapper->GetSampleDistance()*4);
//设置图像采样步长
//volumeMapper->SetAutoAdjustSampleDistances(0);
//volumeMapper->SetImageSampleDistance(4);
/*************************************************************************/
vtkSmartPointer<vtkVolumeProperty> volumeProperty =
vtkSmartPointer<vtkVolumeProperty>::New();
volumeProperty->SetInterpolationTypeToLinear();
volumeProperty->ShadeOn(); //打开或者关闭阴影测试
volumeProperty->SetAmbient(0.4);
volumeProperty->SetDiffuse(0.6); //漫反射
volumeProperty->SetSpecular(0.2); //镜面反射
//设置不透明度
vtkSmartPointer<vtkPiecewiseFunction> compositeOpacity =
vtkSmartPointer<vtkPiecewiseFunction>::New();
compositeOpacity->AddPoint(70, 0.00);
compositeOpacity->AddPoint(90, 0.40);
compositeOpacity->AddPoint(180, 0.60);
volumeProperty->SetScalarOpacity(compositeOpacity); //设置不透明度传输函数
//设置梯度不透明属性
vtkSmartPointer<vtkPiecewiseFunction> volumeGradientOpacity =
vtkSmartPointer<vtkPiecewiseFunction>::New();
volumeGradientOpacity->AddPoint(10, 0.0);
volumeGradientOpacity->AddPoint(90, 0.5);
volumeGradientOpacity->AddPoint(100, 1.0);
volumeProperty->SetGradientOpacity(volumeGradientOpacity);//设置梯度不透明度效果对比
//设置颜色属性
vtkSmartPointer<vtkColorTransferFunction> color =
vtkSmartPointer<vtkColorTransferFunction>::New();
color->AddRGBPoint(0.000, 0.00, 0.00, 0.00);
color->AddRGBPoint(64.00, 1.00, 0.52, 0.30);
color->AddRGBPoint(190.0, 1.00, 1.00, 1.00);
color->AddRGBPoint(220.0, 0.20, 0.20, 0.20);
volumeProperty->SetColor(color);
/********************************************************************************/
vtkSmartPointer<vtkVolume> volume =vtkSmartPointer<vtkVolume>::New();
volume->SetMapper(volumeMapper);
volume->SetProperty(volumeProperty);
vtkSmartPointer<vtkRenderer> ren = vtkSmartPointer<vtkRenderer>::New();
ren->SetBackground(0.6, 0.7, 0.8);
ren->AddVolume(volume);
vtkSmartPointer<vtkRenderWindow> rw = vtkSmartPointer<vtkRenderWindow>::New();
rw->AddRenderer(ren);
rw->SetSize(640, 480);
rw->Render();
rw->SetWindowName("VolumeRendering PipeLine");
vtkSmartPointer<vtkRenderWindowInteractor> rwi =
vtkSmartPointer<vtkRenderWindowInteractor>::New();
rwi->SetRenderWindow(rw);
/********************************************************************************/
//vtkSmartPointer<vtkAxesActor> axes = vtkSmartPointer<vtkAxesActor>::New();
//axes->SetScale(10);
//vtkSmartPointer<vtkOrientationMarkerWidget> widget =
// vtkSmartPointer<vtkOrientationMarkerWidget>::New();
//widget->SetOutlineColor(1, 1, 1);
//widget->SetViewport(0, 0, 0.2, 0.2);
//widget->SetOrientationMarker(axes);
//widget->SetInteractor(rwi);
//widget->SetEnabled(1);
//widget->InteractiveOn();
ren->ResetCamera();
rw->Render();
rwi->Start();
return 0;
}

昨天没艾特上吧主吗?那就再艾特一次把。。。
@rabbitbride

同问，我的也是不透明

楼主，你的问题解决了吗，能不能说一下方法呀，我也是jpg格式，侧面看就是一层一层的堆叠

@rabbitbride 吧主帮帮忙