[vtkusers] Mesh Opacity

[Biddiscombe, John A.]

For correct transparent blending, add a vtkDepthSortPolyDataFilter (or whatever it's called). Just before the mapper, it needs the camera to be set so that it can get the correct distance order of each polygon.

JB

From: vtkusers-bounces at vtk.org [mailto:vtkusers-bounces at vtk.org] On Behalf Of max perlman
Sent: 22 May 2013 08:20
To: vtkusers at vtk.org
Subject: [vtkusers] Mesh Opacity


Dear VTKers,

I want to show a mesh(that i read from an obj file using vtkobjreader) and when i reduce opacity, not to see the triangles from which it is made.

How can i achieve this?

Part of the code:

 reader = vtkOBJReader.New();

 reader.SetFileName(filePath);

 reader.Update();



vtkPolyDataNormals boneNormals = new vtkPolyDataNormals();

boneNormals.SetInputConnection(reader.GetOutputPort());

boneNormals.SetFeatureAngle(60.0);

vtkPolyDataMapper mapper1 = vtkPolyDataMapper.New();

mapper1.SetInputConnection(boneNormals.GetOutputPort());



actor1 = vtkActor.New();

actor1.SetMapper(mapper1);



renderWindow = renderWindowControl1.RenderWindow;

vtkRenderer renderer = renderWindow.GetRenderers().GetFirstRenderer();

// set background color

renderer.SetBackground(0.5, 0.5, 0.5);



renderer.AddActor(actor1);



renderer.ResetCamera();

renderWindow.Render();





private void button8_Click(object sender, EventArgs e)

        {

            if (j > 0)

            {

                j -= 0.1;

                actor1.GetProperty().SetOpacity(j);

                renderWindow.Render();

            }

        }



Thank you,

Max
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.vtk.org/pipermail/vtkusers/attachments/20130522/4da45b73/attachment.htm>