Extremely poor performance when displaying imported SVG text (Outlines)
@TinWhisperer Have you got a SVG you can share? Are you creating solid bodies from the import or just machining straight from the curves? If working direct from the curves have you tried with Show Profile unchecked?
Fusion should be OK with a few hundred curves but quite often something someone says is simple ends up with well over a thousand curves and Fusion is just not going to handle that. The sketch solver and profile detector is just not able to handle thousands of curves.
Mark
Mark Hughes
Owner, Hughes Tooling
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@TinWhisperer What are you doing after import that causes slowdowns? I experimented a bit with the design in my post above as it had some errors, these errors also show in Rhino so not a Fusion problem. I exploded the design in Rhino and it has over 1,000 curves, I didn't have any real problems editing and fixing the problems in Fusion. I only unfixed the parts I needed to work with and unchecked show profiles and show points. One problem I did find is if I tried to move all the curves in the sketch it took quite a while and there were errors after the move.
@jeff_strater can you take a look at the attached f3d file. Try editing the sketch and make a point to point move from the corner of the K to the sketch origin. 2 things you'll notice are it takes ages and some of the ellipses end up in the wrong place.
@TinWhisperer If you need to move something like this around your best bet is create a component, import the sketch with the component active then move the component, this move is instant. Also patterns and copies of the component are easier to create and work with.
Quick example of copied components. @jeff_strater I noticed lately Fusion's display becomes quite slow while dialogs are displayed like below, after clicking OK rotating the display is fast again.
Thanks Mark
Mark Hughes
Owner, Hughes Tooling
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@TinWhisperer Can you share the f3d file you made the DXF from please? I guess it's not supposed to look like this? The tree SVG is just over 1,400 curves so probably pushing what Fusion can handle.
Mark Hughes
Owner, Hughes Tooling
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lots of topics here...
- large SVGs. Yes, 1000 curves of any type will always choke Fusion's sketch environment. Both the profile recognition and the solver. SVG import was never really intended for these kinds of workflows. The idea was to create profiles similar to what you would create manually - so, many 100 curves, max. Now, you can argue that "intended use" will always be violated, and I guess that is true. But, if I try to tow a 6-ton 5th wheel with a Prius, I should not expect it to work well
- ellipse support. As has been noted in countless other threads, Fusion does not support ellipses, and particularly trimmed ellipses well. So, it is not surprising that the ellipses flip or behave badly under edit
- the combination. Lots of curves, some of which are ellipses, I suspect, send the solver into "numerical" mode, further slowing things down.
- slow when dialogs are up. I haven't experienced this in a general way. However, I do know that some dialogs that have lots of in-scene UI (Loft) can sometimes make viewing operations very slow, because they are taking down and rebuilding that UI on every mouse move. This is something for us to look into
What to do with SVG? I've had an idea for several years now of treating SVG as we do text. As a "primitive" that sketch does not deal with except as a unit. We render it using an SVG renderer in the sketch, and don't turn it into curves until consumption (Extrude, or CAM toolpath). This would help the workflow that does not require editing (which I believe to be the large majority of use cases). However, if you want to edit it, then it would (like text) require some kind of "explode" operation, which would make it slow. I suppose we could offer "selective explode", which might be useful.
Jeff Strater
Engineering Director
hopefully you will not have to buy a non-Prius here. Hopefully we can implement some of these changes so that the Prius can tow whatever you have. It is a common-enough complaint that I hold out hope...
I'm not a CAM guy, but I suspect toolpath problems with SVGs are likely different, but related (still a reaction to too many curves, but the sketch solver is not involved, so the ellipses part might not make a difference).
Jeff Strater
Engineering Director
@TinWhisperer wrote:
thanks for looking at this.
this file is not as bad as some which I ended up having to abandon.
I would end up taking this file all the way through to producing and posting tool paths for the plasma.
Usually the lag only builds on files like this and if i am lucky I may post a CAM files. or maybe ill have to abandon the file and start again fresh.
@TinWhisperer Yes that design is not nice to try and work with! One thing I noticed is when you imported you had Control Point Frame checked, this will pretty much double the amount of data. Do you really need the spline control frame? Only other suggestions I have would be only unfix the parts you need to edit. If you need to scale or move then you'll need to unfix all but make sure you Fix after the move and work without show profile enabled while setting the position and scale.
Mark Hughes
Owner, Hughes Tooling
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Investigating a bit more and found the upside down profile is duplicated, so you have 2 copies. This is going to cause problem, not just because it doubles up the data but also creates problems for the profile detection.
Also noticed you have lots of breaks in the inner profile of the tree, double clicking a curve will chain select. Not sure why you've ended up with gaps.
When I import the SVG and scale to about 13" there are no breaks in the chain.
Mark
Mark Hughes
Owner, Hughes Tooling
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