I am intenting to make my own UV-Unwrapper, something like the fabuleous ‘smart unwrap’, but it should obey seams and pinned uv-coordinates.

At the moment i am stuck with the somehow pinned-property of an UV-coordinate, how can i archieve if a vert is pinned to an uv-coordinate ?

*the script will unscrample by a mean-least-square-algorithm, which obeys angles between edges, distances of edges and z-coordinate, after a proper approximation the script will detect verts under ‘stress’ - which means, the square error at this vert is higher than a certain given amount, and break the edge at this point.
I am experimenting already with different parameters to decide, which edge will be broken up, but i can’t avoid at this point to overlap the uv-faces, with pinned points i have a relevant influence on the unwrapping which could avoid overlapping
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