If draw a curve, hit the tangent button, I can choose this curve, then a line to make them tagent.
If I choose tangent + curvature continuity, I can still choose the curve, but the line can't be choosen. There is no geometrical reason why a curve could not end with zero curvature.
There should be a solution to this problem : it is to constrain the last
two [edit : three] control points of the curve onto the line prolongation but in this case, in order that the curve and the line don't overlap I need to use another sketch.
Is there a simpler way of addressing this problem in ST6 or ST7 ?
Solved! Go to Solution.
I'm not sure if there's a more orthodox way, but one thing I would consider would be to eliminate the line altogether, if you can. If you constrain the last few control points of the spline to be colinear, you'll have a spline approximation of a line, and you don't have to worry about the c2 condition. Eliminating the line reduces some of the complexity of the finished part, depending on what you're doing.
Another thing you can do is to eliminate the spline and just make a Bluesurf with a c2 connection between two other entities. 3D thinking vs 2D thinking.
Or even make a sharp corner and put a c2 round over it.
If you need c2, there's a way to get it.
Thanks for your suggestions. I will try them.
I have just started to work with SE. At this stage, I find it far less intuitive to use than SW, though I was a complete beginner with CAD when I first used it.
As the underlying math (and moreover, the kernel) is the same, I can agree to the idea that finally it won't make any difference in the end but SE learning curve is to me far steeper.
Well, it depends on what you're doing. If you're doing synchronous and machine design, I think you'd find SE a lot more powerful. Surfacing in SW was a series of workarounds. Very little difference in that regard, probably. Edge definitely has a different workflow. Once you get used to that, you'll feel more at home.
@ABM -- what kind of products do you design? What brings you to SE from SW? What's the use case you have where you want curvature continuity with a line?
I don't design parts yet, I am learning with SE academics.
More precisely, I am in an agricultural school. In my previous school I had basic exposure to CAD for practical purposes and liked it. Now there is no CAD in the school I am in so I switched to SE because of the avaibility of SE academics.