Pascal Germroth wrote:
AFAIK SVG only has "Type 2" gradients, since PDF's "Type 3" allows not only ellipses and their center but arbitrary circles.
"Type 7" Tensor-product patch meshes seem like the best format to me, depending on the output format it can be rendered as types 6, 5, 4, or blurred blobs of color.
The UI should be like Illustrator's, i.e. allow generation of a rectangular n*m grid, subdivision, and the gravity brushes to deform the mesh. Also, in addition to pulling on path segments using the mouse and thereby adjusting the 2 control points, it should be possible to pull on a patch and adjust its 8 control points.
Note: I'm repeating things I have read but I have not experience or knowledge about the matter myself.
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?
In the past some people were of the opinion that common UIs for editing Coons patch meshes were complicated and unintuitive for artists. The hope was to develop something more natural to work with.
Aaron Spike