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RCBASIC4/doc/files/pointinquad.txt

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#title PointInQuad [RCBasic Doc]
#header function PointInQuad(px, py, x1, y1, x2, y2, x3, y3, x4, y4)
Returns true if the point (px, py) is in the quad (x1, y1) to (x4, y4)