About: http://webisa.webdatacommons.org/287975104

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	http://freak32.dyndns.org/illustration1.jpg If you just need to know, _if_ there is a collision, just check, if the _new_ y coordinates of L2_1 and L2_2 are one <= y(L1_1) and the other >= y(L1_1).
http://www.w3.org/ns/prov#wasQuotedFrom	opengl.org