[Octave-bug-tracker] [bug #58282] Missing plot properties 'MarkerFaceAlpha' and 'MarkerEdgeAlpha' in the scatter function

[Rik]

Follow-up Comment #12, bug #58282 (project octave):

Printing of markers for scatter objects is going to be different from that for
line objects because line objects don't implement "MarkerFaceAlpha".

I think fixing alpha printing might require some real understanding of the
library gl2ps and someone to look at gl2ps-print.cc.  For example, alpha
blending might be disabled according to this code in draw_axes.


      if (has_alpha (props.get___myhandle__ ()))
        {
          opts &= ~GL2PS_OCCLUSION_CULL;
          // FIXME: currently the GL2PS_BLEND (which is more an equivalent of
          // GL_ALPHA_TEST than GL_BLEND) is not working on a per primitive
          // basis.  We thus set it once per viewport.
          gl2psEnable (GL2PS_BLEND);
        }
      else
        {
          opts |= GL2PS_OCCLUSION_CULL;
          gl2psDisable (GL2PS_BLEND);
        }




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