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multi sub MAIN( Int:D $x1, Int:D $y1, Int:D $x2, Int:D $y2, Int:D $x3, Int:D $y3, Int:D $x4, Int:D $y4 ) | |
{ | |
with intersection( $x1, $y1, $x2, $y2, $x3, $y3, $x4, $y4 ) -> ($x, $y) | |
{ | |
say "The intersection is at $x, $y."; | |
} | |
else | |
{ | |
say .exception.message; | |
} | |
} | |
multi sub intersection( Int \x1, Int \y1, Int \x2, Int \y2, Int \x3, Int \y3, Int \x4, Int \y4 ) | |
{ | |
try { | |
return | |
( (x1 * y2 - y1 * x2 ) * (x3 - x4) - (x1 - x2) * (x3 * y4 - y3*x4) ) div | |
( (x1 - x2) * (y3 - y4) - (y1 - y2) * (x3 - x4) ), | |
( (x1 * y2 - y1 * x2) * (y3 - y4) - (y1 -y2) * (x3*y4 - y3 * x4) ) div | |
( (x1 - x2) * (y3 - y4) - (y1 - y2) * (x2 - x4) ); | |
CATCH { when X::Numeric::DivideByZero { return fail "Lines are parallel or identical" } } | |
} | |
} |
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