Cubic Curve Tangents and Knots

[tambok]

Hi,
i want to create curve with its tangent and knots. So i could edit curve with manipulated tangent and knot points. I see as in this web http://softimage.wiki.softimage.com/xsidocs/curves_DrawingandManipulatingCurves.html

There is a Spline sample. but i dont know how to create tangent points.

Regards
tbk

[Jerome.D (BeanzMaster)]

Hi Tambok a Cubic spline (bezier) curve is set by 4 points
First Point
Control Point A
Control Point B
End Point

For tangent just draw a line from First point to Control Point A and a line from End Point to Control Point B.

Cheers

[Jerome.D (BeanzMaster)]

Read this very good doc on the subject http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.141.2780&rep=rep1&type=pdf

[tambok]

Hi Jerome.
Many thanks, i'll try it.
For the link, i'll see it too.

Regads
Tbk

[tambok]

Hi Jerome, the pdf file from the link could not be opened.

[Jerome.D (BeanzMaster)]

Hi Tambok open well with me. I attached the pdf here

[tambok]

Hi, i'm back
i have tried to make a cubic spline curve, as in first attacht

What i want to ask are:

1. does the curve using lsmcubic have any features? such as tangent point.
   if yes, how to implement it?

if No, i can find its tangent points, by converting lsmcubic Curve to lsmBezier curve. But the curve become split each other and no longer as a continuity.

1. if lsmcubic has to be changed to lsmbezier, then how to make the pieces of lsmbezier in one unit curve?

Regard
tbk