Autocad bug in trimming under certain situations

[Daniel_Abreus]

I've detected a bug last days, when you rotate axis, you can't trim single closed figures done in the new coordinates.Could anyone confirm if is it really a bug?I post an attachment in dwg to demonstrate

bug_2.dwg

[RobDraw]

I can trim just fine. Please explain in detail what you are doing in order to get to this supposed bug.

 

Why are you working in a front view?

[ReMark]

Daniel:

 

If I am in a Front view of your drawing I too can trim just fine. Note that like yourself I am using vanilla AutoCAD 2015.

[Daniel_Abreus]

I'm working in top view, I attached some polygons cutted by lines.I'm trying trimming these polygons using these lines.So, I select trim command, next the line and finally I select the polygon, but isn't working.Note that I rotated the axes previously, but I'm still working in x,y.See the attached figure and the previous dwg file

[ReMark]

I opened your drawing and without changing the UCS or the view in any manner I was able to trim the two circles and the polygon using the straight and curled lines. Still don't see any problem.

[RobDraw]

You are working in the front view. This is the top view. As you can see you have Z values in what appears to be a 2D drawing. Also, check the options in the trim command. If Projection is set to none, you won't be able to trim.

[RobDraw]

This is not a bug. It is user error.

[Daniel_Abreus]

To conclude this thread, my problem was solved,Thanks RobDraw and ReMark.My projmode was set [0], to trim this figure case, I had to set projmode [1].

=)

 

This led me to another question, an object that is in front plane can be turned in top plane, without rotating the object, simply changing the coordinates?Because, I noted when I work in top plane I don't need to set projmode [1] to trim the figure.

[RobDraw]

I am still wondering why you are working in a front view and using z coordinates for 2D linework. You could avoid this "bug" by setting up your drawing environment properly.

[Daniel_Abreus]

I 'm working in 3D solids using autocad, when I need working in a solid surface that is in front view or bottom view, I use 3 point UCS, and I put x,y axis in front view, or bottom view, or any other new work plane. Is this wrong? what should I do in this case? Rotate the object? but if the solid is very complex and difficult positioning?How should I set up my drawing enviroment in this case?

[ReMark]

You can continue as you are doing or use the Dynamic UCS feature.

 

As per your AutoCAD Help file....

 

Issue:

When creating 3D objects, you want the UCS to align with the active 3D face of the object. This will allow objects to be drawn on that specific plane.

 

Solution:

With the dynamic UCS turned on, you can align the XY plane of the UCS with a plane on a 3D solid. To toggle on and off the Dynamic UCS you can use the F6 key. Alternatively, you can type UCSDETECT into the command line and then enter 0 (not-active) or 1 (active).