geometry - Check if a point is on a 3d line? -


i know how check if point on 2d line or not, i'd in 3d. ideas?

        // slope point 1 point 3         var p13:number = (math.atan2 (end.x - start.x, end.y - start.y)) * todegrees;          // slope point 1 point 2 -- matches?         var p12:number = (math.atan2 (point.x - start.x, point.y - start.y)) * todegrees;          return math.round(p12) == math.round(p13);

normalize vectors. check if normals match.

find greatest value, divide of other values value vector normal.

any point on line should have same vector normal.


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