Returns the point at the specified parameter value along a curve
Supported Platforms: Windows only
(vlax-curve-getPointAtParam curve-obj param)
Type: VLA-object
The object to be measured.
Type: Integer or Real
A number specifying a parameter on the curve.
Type: List or nil
A 3D point representing a point on the curve, if successful; otherwise nil.
For the following example, assume that splineObj points to the spline shown in the example for vlax-curve-getDistAtParam.
Obtain the start parameter of the curve:
(setq startSpline (vlax-curve-getStartParam splineObj)) 0.0
Obtain the end parameter of the curve:
(setq endSpline (vlax-curve-getEndParam splineObj)) 17.1546
Determine the point at the parameter midway along the curve:
(vlax-curve-getPointAtParam splineObj ( / (- endspline startspline) 2)) (6.71386 2.82748 0.0)