nl_tokens: This is used to compare events for the sweep line procedure Points are : 1 . sorted lexicographically 2 . sorted by type ( point < end < start ) 3 . segments sorted by winding order 4 . sorted by index
pl_tokens: function compareEvent ( a , b ) { var d = ( a . a [ 0 ] - b . a [ 0 ] ) || ( a . a [ 1 ] - b . a [ 1 ] ) || ( a . <mask> - b . type ) if ( d ) { return d } if ( a . type !== EVENT_POINT ) { d = orient ( a . a , a . b , b . b ) if ( d ) { return d } } return a . idx - b . idx }