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Patrick Cloutier asked Phil BoBo edited

Background disappears when its origin is out of view

If have a model in millimeters. If I import a cad background in meters, I have to set it x and y size to 1000 to convert the size. That works.

But now the background disappears whenever I pan and its origin gets out of view.

I recreated the problem in a blank model with the default ER_small CAD file and it does the same. See attached model.

ScalingProblem.fsm

model background
scalingproblem.fsm (275.7 KiB)
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EDIT:I think it is a feature and not a problem. Perhaps you get around if you deactivate perspective view option. background-image-disapear-on-windows-border.gif


You are right.

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Have you tried the model I attached? You can't even zoom in without the layout disappearing. It is a problem. I will try what you suggest.
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It only does it when the model units are mm and you have to scale the layout. I am reusing an old model so I can't change the model units. I solved it by scaling the new CAD beforehand in AutoCAD. So problem solved. But it sure looks like a bug.

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Phil BoBo answered Phil BoBo edited

"The drawing's scale factors affect the view culling of the DWG renderer.

If the scaling is uniform across the X, Y and Z axes then the drawing should not clip inappropriately when the view is rotated or zoomed.

If you need non-uniform scaling, rescale the drawing in AutoCAD."

From: Importing CAD Drawings and Floor Plans (flexsim.com)

1638210004094.png

If you change the Z scaling in your sample model to match your X and Y scaling, then this view culling issue is resolved.


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