RosettaCodeData/Task/Ray-casting-algorithm/Ursala/ray-casting-algorithm-1.ursala

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#import flo
in =
@lrzyCipPX ~|afatPRZaq ~&EZ+fleq~~lrPrbr2G&& ~&B+fleq~~lrPrbl2G!| -&
~&Y+ ~~lrPrbl2G fleq,
^E(fleq@lrrPX,@rl fleq\0.)^/~&lr ^(~&r,times)^/minus@llPrll2X vid+ minus~~rbbI&-