| OCR Text |
Show 40 Those to plane in updated sort, the amount for and X blocks the next which each (Yscan-l) by Yscan-l-Y1 = X from and Z one coordinates functions of this incremental constant a scan Y: = a Y2-Yl positions Z their changes a in step active simple linear For of value remain have must position. a and edge change by (Yscan) a 1 - Y2-Yl incremental constant amount. X(Yscan-l) similarly Z(Yscan-l) These (Z2-Z1)/(Y2-Yl) the active descriptor block each new scan For active with polygon may line then and dX as then list contains plane. is then The (X2-Xl) / (Y2-Yl) values, when the be stored in The update of calculated be list Z2-Z1 Y2-Yl _ and dZ. once and edge first the X and edge Z for becomes: x = X Z = Z - - particular position of a that Z(Yscan) incremental two enters = an cross represented entry dX dz the scan plane, for each edge section curve implicitly by of then, the intersection a those particular elements of |
