Using Spline Handles

Rob,

I would normally rather not manipulate the two handles separately, but sometimes it seems to be the only way to get the shape right.

Setting two handles to be equal would be nice.

I would not want to put a kink in a spline by rotating the handles separately. That seems like asking for trouble. I would use two separate splines for that case.

Jerry S.

ok so Richard has seen fit to remove another one of my posts because it isnt flattering.

Honestly I wish Richard wouldnt be so zealous with his censorship protective chap he is and all.

I'm trying to make a serious contribution here.

I'll try again shall I, being a little less abrupt.

I was horrified to read this is even being considered. It scares me that someone charged with the task of defining program content would ask about this.

I really dont know how someone who has a good practical understanding of the software for ID purposes would seriously propose it.

This is exactly the type of random nonsensical thing experienced users get riled and short about.

At one point someone thought it would be a good idea to rip out spline curvature comb outlines too and we saved that from improvement. Give us some credit for knowing whats needed.

Recently a Product Definition job was advertised here and I suggested rather than hire another person they should listen to early critical feedback from real world users. I'm trying to provide that here. Head it off at the pass, before it gets away on us, as it were.

If this is some intro to justify ripping out separate weighting to accomodate the inclusion of some more conics integration because the Siemens spline code is different/simpler and its convenient to cut SW down to fit the kit I would strongly oppose it.

Please put the extra effort in to doing it properly rather than taking the easy way out.

Dassault say they are committed to SW development so take some time and do it right.

Please leave the handles code as it is. Having separate weighting is very useful. Just because Product Definition types cant see the worth of it doesnt mean it should be tidied up by removing it. You want to deliberately affect the curvature like that pictured above.

I cant think of any practical use for the bent in the middle spline for sketches or surfaces constructed from them.. Like Jerry I would use 2 splines for that situation.

If you want to improve splines please fix the flipping out spline handles issue that has been in there since their introduction.

Thank you.

So Richard is that one more acceptible?

If someone wants a spline that isn't smooth (or even one that isn't internally c2), they should consider two splines. I avoid using interior handles because a bug in them has cost me a few thousand dollars and a good customer.

The asymmetrical interior handles are something I never really fully embraced. It's a pretty esoteric area when compared against other things that need attention, even other things within splines that need attention.

At this point, I think the less you eff with it, the better. We have workarounds for most of the bugs, and re-finding bugs, re-learning workarounds isn't attractive unless there's going to be some major trade-off.

Yes I very much would like the spline handles to be controlled separately.

This is necessary when modelling Coons surfaces, for example in a car hood.

Also if I could move them at distinct angles, that would allow me to make

curves with breaks in them. I do it frequently in other environments. Is

there a way to do this in SolidWorks. As per the last sketch in your post.