Overlay Color Information with patch()

2011 10 13
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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?

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Walter Roberson
Walter Roberson 2011-10-13

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

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Sylvia
Sylvia 2011-10-13
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
Walter Roberson 2011-10-13
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
Sylvia 2011-10-14
How would one repeat the data?

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