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Topic:
calculating an angle between a point and a vector (kind of)
Replies:
2
Last Post:
Jun 18, 2013 9:26 AM




Re: calculating an angle between a point and a vector (kind of)
Posted:
Jun 12, 2013 2:48 PM


> Everythjing is in 2d. > > I have two points (p1 and p2). I know ther current > x,y. One of those points (p1) has a bearing so on the > grid it is more like a vector. I need to calculate > the angle between the vector and the line p1p2.
A = x i + y j ; P = (x2  x1) i + (y2  y1) j
ArcCos(dot prod)/abs(A)/abs(P)
Narasimham



