Correct origin for hitting (perspective projection)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@33709 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Correct origin for hitting (oblique projection)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@33710 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Simple syntax for parametric curves

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@33712 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e