Thicken not good

[danielND6TD]

Hello.

The problema is when is use the thickness tool, in the corner in front of the ships`s hull dont make the thicknes like in the two corners oof the back. The thickness of the front is rounded, and the thickness of the back are perpendicular and square.

Thanks.

[jeff_strater]

thanks for sharing that model.  Let me send this to our modeling kernel team to take a look to see if this is a bug or some other explanation.

[danielND6TD]

Thanks! Is very important to me to undertand this strange behavior of the tool. I think it`s related with the way of make the loft of the surface. I need a correct behavior off the thickness.

[TrippyLighting]

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@danielND6TD wrote:

I think its related with the way of make the loft of the surface. 

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Correct! The thicken tool cannot work correctly exactly because you are lofting into a singularity.

Lofting creates NURBS surfaces. The shape of NURBS surfaces is governed by a quad mesh of control vertices.

When lofting into a single pointing the CVs (control vertices) of that mesh collapse into that single point, the singularity.

That's why the thickening tool does not work. I used a higher end CAD software to visualize the arrangement of the CVs. As can be seen that application also thickens the same way Fusion 360 does it. 

[laughingcreek · Accepted solution]

Also, looking at your splines from sketch 1 and 2 with the curvature combs turned on, you can see that you end up with a very high rate of curvature right at the ends.  first pic is your curve, second pic is after I fiddled with the tangent handle.  doing this for the spline in sketch 1 and 2 resulted in the model you see in the third pic (and attached.) 

As a side note-In general, your using to many control points on your splines.

[danielND6TD]

Thanks so mcuh. Now i have a more perfect design.

But i want to make the two profiles of the loft perpendicular, but i cant chose in both "direction"...