Re: [Inkscape-devel] gradient mesh

Joshua A. Andler wrote: > On Fri, 2009-12-25 at 10:07 +1030, Adrian Johnson wrote: >> Aaron Spike wrote: >>> Joshua A. Andler wrote: >>>> On Thu, 2009-12-24 at 08:14 -0600, Aaron Spike wrote: >>>>> Color in SVG includes an alpha channel. I've been told that rendering of >>>>> Coons patch meshes is ambiguous when this is the case. Does this also >>>>> affect Tensor-product patch meshes? >>>> I'm curious about the ambiguity. Do you recall why that was said? I'm >>>> sure it's more technical, but if it works how I imagine it could, it >>>> could afford great artistic leverage. >>> IIRC extreme bends in the control beziers can cause the fill to self >>> overlap. Transparent or semi-transparent colors would allow the deeper >>> parts of the fill to bleed through. And once again, remember that I >>> don't know what I'm talking about. :-) >> There is an experimental implementation of mesh gradients for cairo at: >> http://cgit.freedesktop.org/~ajohnson/cairo/log/?h=mesh >> >> This branch makes it easy to write a few test cases help understand how >> PDF Type 6 and 7 gradients work. >> >> Some sample output (including self overlapping and transparency) is at: >> http://people.freedesktop.org/~ajohnson/mesh/ >> > > Would you be willing to do one that has both self-overlapping & > transparency where the overlapping portions are? I'm not seeing one > currently. That would be helpful to seeing how it reacts. > > Cheers, > Josh I've added the mesh-gradient-overlap-transp test case.