* start polygon triangulation
* fix picking of intersection curves

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@30938 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
* start polygon triangulation

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@30939 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Correct visible angle

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@30940 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e