continued from : http://www.html5gamedevs.com/topic/15523-getheightatcoordinates-alternative/?p=111175
same algo slightly modified for a ribbon : http://www.babylonjs-playground.com/#1QC4YQ#8
continued from : http://www.html5gamedevs.com/topic/15523-getheightatcoordinates-alternative/?p=111175
same algo slightly modified for a ribbon : http://www.babylonjs-playground.com/#1QC4YQ#8