| OCR Text |
Show 41 be must There from coming list the an connected pairwise in polygons two end enters active the necessitates This a across be several must be some link segment so that when a the this search edge block containing the they sweeps right link polygon number a and there point list, implicitly by storing these polygon. may Sometimes found. be of particular there edge blocks defining the may list that beam scan Since active the number the as of edges even direction. X the the of the is in them in different between the left block edge block. edge edge list number polygon same be represented only each active the hand should to find as the entering edge. maintained, of an the between the the elements list X is the active usually line point edge is of all the the X to its points scanning Z coordinate coordinate of the Z field must be point of As the lies polygon. As generated from is the block the updated. just beam This may be Z define While a the these two contains sweeps and for as between then to beam. scan edge X The used are found, the reason order. blocks in is beam scan are this interpolation point descriptor the A X with intersect The X, beam. For in sorted endpoints. in intersections points edge list. point. by edges of the two is points formed coordinate active linear by intersection of straddling edge segment active of X, kept the at list, list coordinates in coordinates the while moves in a with curve list beam scan consisting active active X the During over done the one in Z unit an |
