Invisible <voi### [at] devnull> wrote:

> 100 control points, you use them to control several dozen independent

> effort, I have yet to determine how you can construct such a set of
> splines from the control points so that the final curve appears smooth
> and joinless.

If you wanted to smoothly join spline1 and spline2:
1)the endpoint of spline1 must be in the same location as the start point of
spline2
2) the last control point of spline1, the endpoint of spline1/start point of
spline2, and the first control point of spline2 must be co-linear.

The discontinuity is caused by the change in slope between the control points
and their respective endpoint.  Note that the line between a control point and
its nearest endpoint form a line that has the slope of the curve at the
endpoint.  If you make the slopes of the two adjacent splines different, then
they do not connect smoothly.

-Reactor

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