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Initial data commit

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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 72d218235f
commit f23f22d71c
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Task/Ray-casting-algorithm/J/ray-casting-algorithm-1.j Normal file
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NB.*crossPnP v point in closed polygon, crossing number
NB. bool=. points crossPnP polygon
crossPnP=: 4 : 0"2
'X Y'=. |:x
'x0 y0 x1 y1'=. |:2 ,/\^:(2={:@$@]) y
p1=. ((y0<:/Y)*. y1>/Y) +. (y0>/Y)*. y1<:/Y
p2=. (x0-/X) < (x0-x1) * (y0-/Y) % (y0 - y1)
2|+/ p1*.p2
)

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Task/Ray-casting-algorithm/J/ray-casting-algorithm-2.j Normal file
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SQUAREV=: 0 0 , 10 0 , 10 10 ,: 0 10
SQUAREV=: SQUAREV, 2.5 2.5 , 7.5 0.1 , 7.5 7.5 ,: 2.5 7.5
ESAV=: 3 0 , 7 0 , 10 5 , 7 10 , 3 10 ,: 0 5
ESA=: (0 1,1 2,2 3,3 4,4 5,:5 0) , .{ ESAV
SQUARE=: (0 1,1 2,2 3,:3 0) , .{ SQUAREV
SQUAREHOLE=: (0 1,1 2,2 3,3 0,4 5,5 6,6 7,:7 4) , .{ SQUAREV
STRANGE=: (0 4,4 3,3 7,7 6,6 2,2 1,1 5,:5 0) , .{ SQUAREV
POINTS=: 5 5,5 8,2 2,0 0,10 10,2.5 2.5,0.01 5,2.2 7.4,0 5,10 5,:_4 10

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Task/Ray-casting-algorithm/J/ray-casting-algorithm-3.j Normal file
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(<POINTS) crossPnP every ESA;SQUARE;SQUAREHOLE;STRANGE
1 1 1 0 0 1 1 1 0 1 0
1 1 1 0 0 1 1 1 0 1 0
0 1 1 0 0 1 1 1 0 1 0
1 0 0 0 0 0 0 1 0 1 0