Ray-casting algorithm: Difference between revisions

m
→‎{{header|REXX}}: fixed a cut 'n paste mishap (trailing apostrophe).
(immutable data types (C++))
m (→‎{{header|REXX}}: fixed a cut 'n paste mishap (trailing apostrophe).)
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A=2.5; B=7.5 /*◄───for shorter args*/
call poly 0 0, 10 0, 10 10, 0 10 ; call test 'square'
call poly 0 0, 10 0, 10 10, 0 10, A A, B A, B B, A B ; call test 'square hole'
call poly 0 0, A A, 0 10, A B, B B, 10 10, 10 0 ; call test 'irregular'
call poly 3 0, 7 0, 10 5, 7 10, 3 10, 0 5 ; call test 'hexagon'