Full Version: exporting 2d

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Hello Pilou ,

Thank you for the tutorial of the picture insert in Moi . I sometimes worked like this in 2d cad .
When you know certain measurements of the instrument or object in real you can scale the drawing to that and draw a real life instrument based on a picture .
It goes much faster in Moi than in my other cad programs .

Greets ,

Paul

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@Pilou thread, 918.21
do you look for that?
Moi 3Dcurve, skined in Skechup

3d curve in Moi

Imported as dxf

skined

bubbled

smoothed

Attachments:
3dcurvemoi.jpg
dxfbubble.jpg
dxfsketch.jpg
dxfskin.jpg
dxfsoft.jpg

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Seems you find the trick :)
You rocks! Indeed that is the task ! :)
You are a genius! :)
But how do you make that ?
With the sandbox or with an another plugin?
You use the 3ds format?
I am curious of that :)
What is your process?

first:
curves lines arrive in Sketchup as a Component and when you explode the component curves will become separated

second : what function use for the Skin, Buble etc...

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Hi Pilou
NOOOOO no genius, (toolman, HIHI) is a plugin from:

http://www.tensile-structures.de/index.html

Tool is time-limited, =mesh triangles are produced internally ("Sketchup > tab View > show hidden"),
only closed line-loop is accepted, work slowly with complex 3D-curve.

It gives still few useful tools for combination Moi+Sketchup.
My faforits gives afterwards.

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Ok I know this plug ;)
So you just select the curves by a rectangular selection?

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Eap, or additionally +STRG,
or with Ruby InvertSelection.rb , selector.rb and other

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Is that plug works fine with google Sketchup 6? (not the 6 pro)
Edit :Yes all works fine in Google Sketchup 6! :)
Thx for the remember of this tool!
So crazzy forms can be insert in Sketchup from Moi with the Converter of Mikael ! :)

Attachments:
feille.jpg

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Yes, since SK6FREE support with Ruby scripts.
***SK6FREE is only for non-commercial free.
Tutorials here:
http://www.3epraha.cz/
"> CAD/CAM systémy > Sketchup (further down) > Výuková videa (Left down)"

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Yes G.SKetchup is a crazzy prog! :)


Ps Seems the english version of your site is not working !

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Oh,
possible, but all video tutorials are in english-language.

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@Pilou
Attempt: Moi + colored in Sketchup
+ after exported to Edrawings (3D interaktiv for Sketchup)
http://www.edrawingsviewer.com



Example: MoiSkEdw.zip (for view this file, IE recommended)

Attachments:
MoiSkEdw.jpg
MoiSkEdw.zip

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@eddi
Seems cool but we can directly export in 3Ds format from Moi for texture or colorize in free Google Sketchup :)
Google Sketchup can import 3Ds Format !

Attachments:
txt.jpg

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Wow. Just downloaded MoI3D and it is beyond excellent. And thanks to those on this thread for the DXF converter.

I also use SheetCAM and seem to be always looking for a usable CAD package to draw simple 2D parts for machining and 3D for a bit of concept modelling. I'm not a full time mech designer so can't deal with the neverending learning curves of various 3D packages (Solidworks, Alibre) or slow "Autocad style" of nearly every 2D package out there, which always seem to cost too much for casual use.

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Hi adx, I'm glad that you like MoI!

If you end up cutting any designs you drew, please post a photo here, it would be fun to see them.

- Michael

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Will do. Though I since noticed that most circular or elliptical arcs end up "wonky" in DXFs, and even export as .ai and into Xara ends up a bit wonky. For machining, it would be nice if they could be converted into arcs and straight lines where possible, but it's early days, and more of a 3D app. Very cool.

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Hi adx, circles and ellipses will end up as what is known as a "rational" spline in the DXF file, where it has an additional weight value assigned for each control point. It sounds like your target application may not fully support this type of spline curve.

But I'd like to check to see if there is any bug in writing the DXF file, could you please send me one of the files that is not working right? You can e-mail it to me at moi@moi3d.com .

For AI export - AI doesn't actually support exact arcs or ellipses, or rational splines, it only supports bezier curves. So when you do an AI export MoI has to approximate some kinds of curves by a type of refitting process. Right now this is done to a tolerance of 0.05 units, so if you have curves that are pretty small, they will get approximated rather roughly.

If you could send me a sample .3dm and .ai file for that problem as well, I could see if I can fix that up to work better.

- Michael

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Hi, excellent support there.

I found that the DXFs view correctly in the SolidWorks model viewer and Alibre, so it's Qcad that is working incorrectly, screenshot attached along with shot of the original (1600*1200 sorry). SheetCAM, most G code output, and things like my PCB design package (Protel, my day job) can only deal directly with lines and circular arcs, hence my interest in that. I had been using Qcad to import features that need to be converted to polylines (like ellipses), maybe not such a good idea.

I couldn't replicate the .ai issue clearly in Xara this time. It was just a file I drew very similar to the attachment shown, and deleted after playing. Your description of the approximation sounds rational (no pun intended), the thing I drew was very small.

If I come across any clear examples I'll send them. In the mean time my vote is for 2D export of circular arcs and straight line features if that's possible, so they can be directly imported into 2.5D CAM or non-mechancial CAD systems.

Thanks - Antony.

Attachments:
plate-test2.3dm.moi.png
plate-test2.dxf.qcad.png

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Hi Anthony, based on your screenshot, it does look like the weights are not being read in QCad.

However, looking into it there appears to be an additional flag that I can set to mark the spline as having weights. It appears that most programs will read the weights if they are present regardless of whether the flag is in place, but maybe QCad will only read them if the flag is set.

Can you please try the attached test_qcad_circle.dxf file and see if this one will read into QCad properly? This one has that flag set on it.


> the thing I drew was very small.

Yeah, it was most likely related to the small size. I'll look into tuning this up, I should be able to look at the size of the curve and if it is small I will use a tighter tolerance for the refitting process.

- Michael

Attachments:
test_qcad_circle.zip

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Hi Anthony, I also updated the converter program ( http://moi3d.com/download/3dmCurves2DXF.zip ) to write this additional flag as well, so if that circle works then grab this new version.

> In the mean time my vote is for 2D export of circular arcs and straight line
> features if that's possible, so they can be directly imported into 2.5D CAM
> or non-mechancial CAD systems.

Yes, when I get to this point for version 2 I want to have several options for DWG/DXF export, whether to export as splines, use arc and line entities, or break things into polylines.

- Michael

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Thanks again, I've been slow to check this forum, busy.

I tried the circles dxf with much the the same result as before. The circle is 'square' as seen in the 3rd attachment, also if I try to make it round you can also see there is a sharp node (maybe start and finish) in attachment 1. An import straight into SheetCam converts it to polylines, very similar to QCad, otherwise I'd say the problem is limited completely to QCad.

I wouldn't worry about it too much, if extraction of arc and line entities is on the drawing board then that's good enough for me!

BTW I did something useful in 3D lastnight and it was all done in 15 mins. Apart from a little playing on SolidWorks and over the years and more recently with Alibre, I'm no 3D designer. Very cool. I might make a gallery post.

- Antony.

Attachments:
test_qcad_circle-modified.png
test_qcad_circle-sheetcam.png
test_qcad_circle.png

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