Sketch constraints: Coincident or Colinear to Origin plane?

[Anonymous]

Folks,

Does anyone know if it is possible to constrain a line to an Origin (plane) in the Sketcher?  It would seem that you can only constrain a line-end point to be coincident with the Origin center point, the Sketch Constraints do not seem to allow one to use any of the linear parts of an Origin for constraining sketch entities.

If this is the case, I am wondering what purpose the Origin(s) in F360 actually serve the user.  If I can't dimension to it, can't align to it, can't use it as any sort of reference, then what does it do for me as a user at all?

I imagine there are some internal reasons for Origins, e.g. F360 wants seperate coordinate systems or something for bodies and components, but at the user level, what can one actually do with Origins?  In Solidworks Planes (essentially Origins) are eminently useful to the user, F360, I still can't figure it out.

Absent any sort of good comprehensive documenation for F360, I think it is these sort of fundamental UI/UX issues that should get top priority in the new builds.  How about fewer sugary new features and more rework of the core features that make the user experience so poor for those of us with years of experience on other large MCAD packages - I believe we are your largest audience. By core I mean things like these sorts of inconsistencies in the Sketcher, or the Model workspace (e.g. selecting from the top right vs lower left - what the heck?), or fixing the way X-ref'ed sub-assemblies can be configured and manipulated in a top level assembly, etc.

</rant>

[Fully_Defined]

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@michallach81 wrote:

"From everything I have read that he posted he never intended to make a model of the boat".

He didn't, Phil ???

@Fully_Defined:

"For example, I am designing a sailing yacht..."

@TrippyLighting:

"If you want to loft this then that won't result in what you are hoping for."

@Fully_Defined:

"Hoping for?

I already did it, dude."

English is a foreign language for me, but I'm not stupid. I take an offense on that Phil.

As I told Peter, our friend will just alter his arguments.

Phil, be honest, how anyone could come to such idea:

"How about a wooden sailing yacht though? I want to have at least 60 planes, and have hundreds (HUNDREDS!) of points at predetermined coordinates, with two of the points' axes COINCIDENT WITH PLANES. Each of these points become coincident to spline fit points, and this spline then feeds an intersection curve. Multiply that several times and it starts to fill up with superfluous purple lines and repetitive clicking, and it starts to get pretty ugly on screen.

In order to do accomplish my mission in Fusion, I added parameters that match the distances from the origin that the planes would have existed at, and then used that parameter as the dimension when placing the points. It allowed me to get some consistency without seeing red dots everywhere even when the sketch isn't open. But it's a workaround, and not ideal."

@Fully_Definedis not in a position to judge, his points are mere speculations.

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@michallach81 I admit that I used the word design earlier in the context of this thread, and that may have been confusing in regard to what I said later. Excellent detective work! However, it is not material to the argument, so what does it matter?

You are doing a fantastic job furthering my point about forums. Are you familiar with philosophy, and logical arguments? Forums nearly always - and definitely in this case - turn to false arguments when the crowd can't convince someone that they're wrong. This is an example of Ad Hominem. Congratulations!

I'm done here. Enjoy your 2D sketch projections!

Tschüss!

[Fully_Defined]

Oh yeah, and here you go:

It has defects from the accuracy of measurements taken in 1909. The whole point of this is to give a visual representation of what it could look like when rebuilt. The image above is prior to any modifications, and some of the defects stand out.

[michallach81]

I know you don't have reasons to trust me, but try to make in once again but in tsplines (sculpt).

[michallach81]

I have another idea. Can you share with us what you have already?
I can show you how to create that hull with t-splines, and explain each step how any why.
How about that?
I don't have any plans or reasons to prove you wrong, I'm actually interested in you succeeding.
To show you my credibility please follow these:

https://forums.autodesk.com/t5/fusion-360-design-validate/still-no-resolution/m-p/6224212/highlight/...

https://forums.autodesk.com/t5/fusion-360-design-validate/lip-at-tangent-to-body/m-p/6864310/highlig...

https://forums.autodesk.com/t5/fusion-360-computer-aided/v-carve-inlay-anyone/td-p/6583570

[TheCADWhisperer]

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@Fully_Defined wrote:

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In Solidworks, I would have been done with the entire skeleton by the time I had finished this post.

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Can you File>Export and then Attach *.f3d file with ONLY this sketch (and/or SolidWorks *.sldprt file here) so that I can experiment a bit without having to laboriously repeat all of your carefully placed dimensioning?

[Fully_Defined]

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@michallach81 wrote:

I know you don't have reasons to trust me, but try to make in once again but in tsplines (sculpt).

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The truth is that I have a lot to learn regarding this topic. I had a preconceived notion of how I would have liked to accomplish the task, but clearly there are better ways.

I have worked with surfaces before in Solidworks, but they were mainly prismatic and tubular shapes, and in fact in Solidworks there were just as many challenges in creating the surface as there were in Fusion in creating the skeleton. Surface patch in Fusion gladly accepted all 22 sections as interior rails, however Solidworks refused to accept any more than half, and wouldn't use any that terminated at the transom, with little explanation for why or why not.

In the end, it looks pretty decent, but it's only the beginnings:



I looked up some instructional videos regarding how to create a ship hull - including the ones linked to earlier - but they are all mainly in designing a hull; I want to recreate what already exists, warts and all, and then create a second hull that more faithfully expresses the designer's intent. That means that there are hard data points that must be met, and I have yet to see any tutorials that respect a table of offsets.

So yeah, I'll accept your help. Thanks.

[lichtzeichenanlage]

I introduced myself to this forum also with a recreation of an existing design. And I couldn't believe it too. But the truth is, often are just some splines with just 2... 3 points are often enough. The result might be slightly of (mm, cm) but you should still have in mind - how exact could the source be (the last one killed me in the first tries ;-))

[michallach81]

Can you share fusion file with what you have done already, or send in PM?

[michallach81]

While waiting for the design to proceed with my "tutorial", I'm digging the web (since I'm not a naval architect) and here are some very insightful findings:

http://www.polycad.co.uk/index.html (software is for free??? I will check that later)

What you must read are his articles:

http://www.polycad.co.uk/downloads/Iccas15.pdf

or

http://www.polycad.co.uk/downloads/09_Bole.pdf

a lot about the most important thing, about design intent and it's proper execution (design articulation) in context of hull design.

[Fully_Defined]

Check out Autodesk's answer to my comment:

https://www.youtube.com/watch?v=1OgPCrwoNkY

Exciting news!

[michallach81]

Are you serious? I wish you've been sarcastic.

Did you saw anyone from autodesk in this thread?

Regardles my opinion abuot ugency of the problem you've raised, what you saw on youtube was just damage control, don't be deluded.

[michallach81]

Since @Fully_Defined don't like to co-op with me  (not like I'm surprised), I will continue with different model.
For now, you can read this:

https://forum.onshape.com/discussion/comment/46346/#Comment_46346

Later I will show how to use t-splines for such task.

[bh41]

Wondering why you don't mention Leo's Talyho page i'm sure he would appreciate it?