SharpMap modifications

Wow, nearly three weeks since my last blog post (but I do post some updates more frequently on Twitter).

[Warning: tech stuff follows] Anyway, I’m doing quite fine. My bachelor project is slowly taking shape. Currently I am modifying SharpMap for our needs (adding a dynamic layer for our data, adding some events to know what’s going on inside of SharpMap,…).

I’ve also touched the clipping function, which really sucked. I replaced it with Sutherland-Hodgman’s polygon-clipping algorithm which works like a charm. This move was necessary because GDI+ has some problems rendering invalid data (meaning data which is far outside of the viewport). The process doing the drawing will block all others and your system will come to a halt - no moving cursors, no task manager, no nothing.

Because SharpMap is released under the LGPL, I will post the .diff patches as soon as the major work is finished.