Problem about specifying truecolor cData for a patch object

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Niko 2013-12-16

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https://ww2.mathworks.cn/matlabcentral/answers/109945-problem-about-specifying-truecolor-cdata-for-a-patch-object

评论： Walter Roberson 2013-12-18

Hi all,

I'm having trouble with coloring a patch object using cData. My patch object is a triangulated polyhedron, so size(ZData)=[3,12]. When I'm trying to color each face with truecolor, I'm setting size(CData)=[1,12,3] because [1,12] is the dimension of all triangular faces of the polyhedron and 3 is for RGB. However, MATLAB seems to interpret it as colormap indices so I always end up having an ugly blue polyhedron. My guess is MATLAB is misinterpreting the color information because all faces of the patch have 3 vertices, which coincide with the 3 elements for RGB. Is there a way to force MATLAB to interpret cData as truecolor? Or, am I using a wrong dimension of cData for my purpose?

Thanks a lot!

Niko

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Niko 2013-12-18

编辑：Niko 2013-12-18

It's a 1*12*3 numeric array of doubles in the range of [0,1] (e.g. I tried cData=rand(1,12,3)). When I tried get(handle,'FaceColor') it returned a 12-element cell array with each element being a 1*3 numeric array. Does it mean that I should provide cData as a cell array? (It gives an error when I try transferring a cell array directly to facecolor.)