Created
January 12, 2012 19:55
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distance in lua
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| function distance( x1, y1, x2, y2 ) | |
| return math.sqrt( (x2-x1)^2 + (y2-y1)^2 ) | |
| end |
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| function distanceSquared( x1, y1, x2, y2 ) | |
| return (x2-x1)^2 + (y2-y1)^2 | |
| end |
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| function lineDistance( x, y, dx, dy, u, v ) | |
| local wx,wy = u-x, v-y | |
| return math.sqrt((wx^2 + wy^2)-(((dx*wx+dy*wy)^2)/(dx^2+dy^2))) --MATHAMAGICAL | |
| end |
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