VARKON Version 1.15 1997-10-24
tang - Function
Geometrical function
Description
Returns the normalised tangent of a line, arc or curve.
Syntax
tang(ref,t)
REF ref; FLOAT t;
Principal parameters
ref - Identity of line, arc or curve
Optional parameters
t - Parameter value, default = 0.0
Return value
A VECTOR value equal to the requested normalised tangent in the specified position.
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