Tangent vectors at division points

Why is all Tangent vectors at division points from same curve directing different ways?

How can I make them directing same ways?

Thanks

Replies to This Discussion

Permalink Reply by Hannes Löschke on August 5, 2011 at 2:20pm

What direction do you want the planes to face?

Tangent vectors are tagential to the curve at the point of division. Only for straight lines the tangents are the same at every point.

Permalink Reply by Eugene Lee on August 5, 2011 at 2:33pm

right.

I was expecting to at least all of x vectors (Red) from the same curve to face outward just like others and all of y vector (Green) to upward.

Permalink Reply by Hannes Löschke on August 5, 2011 at 2:47pm

oh... ok, missed that.

You are creating planes from origin and z-axis. I don't see any obvious way to orient the planes so that they are aligned regardles of the direction of the z-axis. How should the x-axes point if your curve goes up?

Permalink Reply by Chris Hanley on August 5, 2011 at 3:05pm

I'm away from my gh computer but I think the "perpendicular frames" component will orient all the frames in the same direction. Curves->division ....it's definately on the curves panel.

Permalink Reply by Eugene Lee on August 5, 2011 at 3:30pm

Thanks Chris,

I wanted to use "perpendicular frames" but it needs t value. If I have only "points" for the curve. How can I get t values for each of points.

Permalink Reply by Chris Tietjen on August 5, 2011 at 3:48pm