Overlay Color Information with patch()

Hi,

I'm doing a 3d brainplot with patch( and want to do a sort of background information with facevertexcdata and then overlay it with a second dataset (of the same size) of information for the same faces/vertices with a second colormap. If the values of the second vector drop below a certain threshhold, ideally it would interpolate (or become tranparent) between the first and second dataset.

Anyone have ideas?

Answer 1

[Walter Roberson]

patch() objects have an AlphaDataMapping and FaceVertexAlphaData property; between the two you can control the alpha of faces.

[Sylvia]

Thanks for thequick answer but I'm not quite sure that that is the solution to my problem.

Basically I have two sets of data for facevertexcedata which I'm trying to show simultaneously. So wouldn't I need to control the alpha of that instead of faces?

[Walter Roberson]

In order to have two sets of data per face (or vertex), you will need to either have two distinct patch objects, or else repeat the face or vertex data within a single patch object. The FaceVertexAlphaData can be different for the two different copies.

[Sylvia]

How would one repeat the data?