Re: [Inkscape-devel] gradient mesh

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