Complex sketch crashing fusion

[Anonymous]

 I was able to get a pretty good sketch of the Vitruvian Man. I cleaned it up pretty well, but doing something as simple as dragging a box to select all points causes fusion to lock up and stay locked up.

I have an i7 3770 with 16 gb of ram and 2 gtx 970s

The file is attached if anyone is willing to try it out and see how it works for you.

Thanks, 

Steve

[Beyondforce]

Hi @Anonymous,

Fusion 360 uses a lot of CPU resource on sketches, which is why Fusion 360 doesn't like complex sketches! In Fusion 360 world "Less Is More".

What exactly to do want to do with this sketch?

Cheers / Ben
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[macmanpb]

It exists a simple #rule for that. One sketch for one extrude.

Sure in some situations you have complex sketches 😉

[Anonymous]

That sounds more like a highly inefficient work around rather than a simple rule. I can't even move the sketch because SVG files default to fixed lines when you import them, and when I highlight it crashes. I guess I can simply convert it to a few hundred sketches and fix/unfix them all individually. 

What I am asking is how do I fix this? When it locks up to calculate, I am only using 12% cpu, 0% gpu and 48% of my ram. I don't think better hardware will help too much. Also, what is the deal with rendering? 100% cpu usage 0% gpu. 

[kb9ydn]

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@Anonymous wrote:

That sounds more like a highly inefficient work around rather than a simple rule. I can't even move the sketch because SVG files default to fixed lines when you import them, and when I highlight it crashes. I guess I can simply convert it to a few hundred sketches and fix/unfix them all individually. 

What I am asking is how do I fix this? When it locks up to calculate, I am only using 12% cpu, 0% gpu and 48% of my ram. I don't think better hardware will help too much. Also, what is the deal with rendering? 100% cpu usage 0% gpu. 

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It is known that the sketch engine in Fusion is not optimized, but they are working on it.  What is it you are trying to do?

C|

[TrippyLighting]

Fusion 360 does not use the GPU to accelerate rendering.

[FrankCao · Accepted solution]

Hi jackson, 

Thanks for reporting this issue. It looks like Fusion still have some problems when selecting large number of sketch objects.

Now I have filed FUS-29689 internally to track the problem. Our developer will take a look at this issue soon.

Thanks,

Frank

[Anonymous]

Thanks

[Anonymous]

Hi,

I'm having similar issues, when editing svg files. They're not always complex, but have a lot of splines or curves.
Every single step takes forever when it doesn't just crash Fusion, despite a Ti1060 GPU, Ryzen 3600 and 16Go Ram. 
Sounds like complex sketch editing still not optimised.

[g-andresen]

Hi,

The Fusion sketch engine still has problems with complex SVG and DXF imports.
These problems occur especially when the files have gone through multiple copy and edit operations. Therefore all editing should be done before the import. Nevertheless, it can be difficult from time to time.

günther

[beananimal]

2016  --- "It is known that they are working on it"

Maybe in 2030 or 2035 they will have a sketch engine that is not brought to its knees by more than a few curves and dimensions?

It is a simple rule "One sketch per extrusion" 🤣 🤣 

So for one simple component case,  you are saying between the bosses, mounting flanges, cutouts and other various features, I need 20 sketches. That is insanity... but then again, If I try to do it in 2 or 3 than Fusion360 starts to choke... what a joke.

[TrippyLighting]

Can you share an example?

[beananimal]

Mentioned in the other thread. My issue was a combination of offsets causing constraint issues and mirrored sketch curves creating extreme slowness. I would have been happy to share the sketch if I had not started over. 

Thank you.