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MATLAB ignores a trisurf's FaceVertexAlphaData property

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Jason
Jason 2023-11-9
评论： Jason 2023-11-9
Ran in:
In this MWE, Matlab completely ignores my alpha settings. Am I forgetting something or is this a bug?
[x,y] = meshgrid(0:10);
DT = delaunayTriangulation([x(:) y(:)]);
xx = DT.Points(:,1);
yy = DT.Points(:,2);
surfHandle.FaceAlpha = 'flat';
surfHandle.AlphaDataMapping = 'none';
srf = trisurf(DT.ConnectivityList,xx,yy,ones(size(xx)));
srf.FaceVertexAlphaData = rand(size(srf.Faces,1),1);

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Walter Roberson
Walter Roberson 2023-11-9
https://www.mathworks.com/help/matlab/ref/matlab.graphics.primitive.patch-properties.html#buduav0-1-FaceVertexAlphaData
Note
If the FaceAlpha and EdgeAlpha properties are both set to scalar values, then the patch does not use the FaceVertexAlphaData values.
  2 个评论
Walter Roberson
Walter Roberson 2023-11-9
Ran in:
[x,y] = meshgrid(0:10);
DT = delaunayTriangulation([x(:) y(:)]);
xx = DT.Points(:,1);
yy = DT.Points(:,2);
srf = trisurf(DT.ConnectivityList,xx,yy,ones(size(xx)));
srf.FaceAlpha = 'flat';
srf.AlphaDataMapping = 'none';
srf.FaceVertexAlphaData = rand(size(srf.Faces,1),1);
Whatever surfHandle is, it is nothing to do with srf
Jason
Jason 2023-11-9
Ahh thank you very much. The whole surfhandle thing was a copy and paste error but I see what needs to be done.

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