Strange face behavior on deleting line
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Well, I have been irregular in this forum for a long time now because my SketchUp usage have reduced drastically. The few times I have used in recent times, I have had some frustrating moments. Take two examples illustrated below:
Example 1: I delete one line and the entire face goes off. The gif image is illustrative; it's not a screen grab as I can't replicate the situation right now. I had faced the situation often nevertheless.
Example 2: I am stumped! Delete one isolated line and an entire face materialises! Screen grab and skp attached for anyone willing to dig deeper.
BTW, I work on AutoCAD imports but I do due diligence before importing.
Cheers,
Guite
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dxf imports are notorious for the line not actually joining, which would explain the actions you are seeing, and this happens to me all the time. I use the weld ruby quite effectively, available at the smustard site http://www.smustard.com.
I have had some unusual occasions where this takes place particularly on pitched shapes (ie roof slabs), where if I simply use the pencil tool and draw a coule of lines from edge to edge and then erase the lines the surface will remain. I have never been able to explain this behavior, but I seem to be able to work around it.
Because of the simplicity of the shapes you are showing it sure feels like open corners. -
Hm. Interesting. I don't get the first one when I draw it myself but the second one stumped me, too. Even after the face is created, you cannot intersect it with the overlaying lines.
I also noticed something interesting here. Although the edge (to which thios stray line is connected) seems to be on the green axis (i.e. colinear all the way), when I delete the stray line, the endpoint doesn't disappear.
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Hi Dale,
Thanks for the response, two points to note though: (1) Mine is always a dwg import after preparing the dwg file thoroughly for SketchUp use, and (2) if it were welding problem, faces would not have formed in the first place.Hi Gaieus,
Thanks for the response. I don't always face the first problem, moreover what I have posted is simplified. When I encounter such a situation I check for hidden lines (triangulation) and it shows that the faces are coplanar. -
Hey Guite
Point well taken.
I guess what I was getting at is that these anomalies seem to be predominant when using a dxf import.
I get more weird things happening, more crashes, always when imported dxf files are involved, and often what is happening makes no sense, much like yours.
Some I have learned to work around, but it is frustrating, because dxf is in our workflow around here like it or not.
I'll watch this post with interest. -
Use the move tool at the end of the "line" and move it and you will notice its not a line at all its a plane.
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True, there's something weird there. I could "turn it inside out" (or what) and THEN delete it with any further issues.
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@lapx said:
Use the move tool at the end of the "line" and move it and you will notice its not a line at all its a plane.
Well, I get three outcomes:
Use Select tool to select line >> use Move tool to move line from one endpoint. Possible to achieve desired result.
Use Select tool to select line >> use Move tool to move line from the other endpoint opposite to previous step. Impossible to achieve desired result.
Without pre-selecting, use Move tool to move the offending line. It forms any shape of triangle you want. Impossible to achieve desired result.
@gaieus said:
I could "turn it inside out" (or what) and THEN delete it with any further issues.
I don't quite get you. I thought maybe you meant "reverse face" but I am not getting it in the context menu.
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Well, first I played around like in your 3rd animation. Then what I meant was exactly what you did in the first one. Hehe... Sorry, I couldn't describe it better as there are no words for something we don't understand.
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Hi dale, I have had zero problems with dxf. If you take the same model.dwg, and import it into SU via dxf, then via dwg, that the dwg is OK, and the dxf is not?
Guite, just thinking outside the box. If after all this you are still having problems, try checking your pointing device, and its software settings.
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@honoluludesktop said:
Hi dale, I have had zero problems with dxf. If you take the same model.dwg, and import it into SU via dxf, then via dwg, that the dwg is OK, and the dxf is not?
One of my pet thoughts, thoroughly unconfirmed, is that things might work better in imperial. Importing metric files might introduce further inaccuracies due to the conversions involved. Once this suggestion was strongly turned down by Jim Holman, but it still remains that the floating-point accuracy of SU is not as strong as in the heavyweight CAD apps. And I understand that the DWG/DXF importer is third-party code. Possibly I am still quite wrong...
Anssi
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