[Octave-bug-tracker] [bug #62067] Implementation of edgealpha for Surface

[Liang Tang]

Follow-up Comment #4, bug #62067 (project octave):

After looking through this post below, I did a feasibility trial on patch as a
work around of mesh/surface.   

https://octave.discourse.group/t/transparent-surface-with-patch/2943/2

Patch function is a potential work around, not a solution.  The correct
solution is to make facealpha work within mesh and surface.  

The facealpha property of patch function works properly.  Therefore if one can
convert the mesh/surface data into polygons and generate a single patch for
all polygons, the facealpha of the surface can be controlled/emulated through
one single patch function handle.  

My trial has about 500 patches of rectangles to emulate a tube.  The
performance is quite good. There is no delay in rotation/pan and alpha
changes.  


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