Math-Get perpendicular distance

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Returns the shortest (perpendicular) distance between a line AB and a point C. By Orso B. Schmid

{ Orso ***************************** }
{ returns the shortest distance of a point c from a line a-b  }
FUNCTION M_GetPerpDistance(a, b, c: VECTOR): REAL;
		M_GetPerpDistance := M_GetDistance(c, PtPerpLine(c, a, b));