* better Drawable3D.updateForView()
* correct cone drawing
* correct normal direction in shaders
* (commented) specular light in shaders

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35196 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
enable IntersectPath[line, conic]

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35197 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
4.9.292.0

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35198 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Tidy up the code

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35199 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e