AutoCAD Civil 3D General Discussion

AutoCAD Civil 3D General Discussion

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Valued Contributor
RCBmstg007
Posts: 53
Registered: ‎09-08-2006
Message 1 of 9 (610 Views)
Accepted Solution

Trying to Match Perspective to ViewPort

610 Views, 8 Replies
01-23-2013 10:30 AM

I am having a really hard time trying to get this to work. If you see the image below. I am trying to make the viewport match the oblique / birds eye view in paperspace. Anybody have an idea how to do this? I do have everything set in real life (1:1) paper and model. The Model space has a 2D Line drawing; while the paper space has a transparent (60%) birds eye view image.

Thanks!

Without knowing the height of the camera and its angle towards the subject of the photo, I don't know how you would do that mathematically.

 

If you want to trial and error it, you could use the Viewcube to spin the view until it looks good, or use the Vpoint command to place the viewpoint where you estimate it should be.

 

If my previous post solved your initial question, please mark it accept as solution so others that might have the same question will be able to quickly find their answer without reading the entire thread. Thanks.

 

Best regards,

 

Tim

*Expert Elite*
tcorey
Posts: 2,763
Registered: ‎12-18-2002
Message 2 of 9 (600 Views)

Re: Trying to Match Perspective to ViewPort

01-23-2013 11:17 AM in reply to: RCBmstg007

Are you saying you have an image that is a photo taken from a birdseye view and that you want the linework to look like it matches up with that?

 

Use Saveas to save the drawing to a different file if you don't want to overright your existing drawing.

Move the image to modelspace.

U ADERSHEET command to rubbersheet the linework to the image.

 

 

Tim Corey, Owner
Delta Engineering Systems
Redding, CA
Autodesk Authorized Value-Added Reseller
Valued Contributor
RCBmstg007
Posts: 53
Registered: ‎09-08-2006
Message 3 of 9 (589 Views)

Re: Trying to Match Perspective to ViewPort

01-23-2013 11:54 AM in reply to: tcorey

You are correct. could you possible show me an example? I am having trouble getting the image to overlay ontop of the line work. I hope that makes some sense.

*Expert Elite*
tcorey
Posts: 2,763
Registered: ‎12-18-2002
Message 4 of 9 (576 Views)

Re: Trying to Match Perspective to ViewPort

01-23-2013 12:31 PM in reply to: RCBmstg007

Use eTransmit to make a package of your drawing and image, post here, and I'll take a look...

 

Tim

Tim Corey, Owner
Delta Engineering Systems
Redding, CA
Autodesk Authorized Value-Added Reseller
Valued Contributor
RCBmstg007
Posts: 53
Registered: ‎09-08-2006
Message 5 of 9 (568 Views)

Re: Trying to Match Perspective to ViewPort

01-23-2013 12:57 PM in reply to: tcorey
Valued Contributor
gunnarl
Posts: 63
Registered: ‎11-08-2006
Message 6 of 9 (567 Views)

Re: Trying to Match Perspective to ViewPort

01-23-2013 01:02 PM in reply to: RCBmstg007

One thing to try...

You can apply the image as a "background" to a saved view in paperspace, then 3D orbit the drawing until the linework matches up with the image in the background. See the "View" command and" background override" options in the view dialog for setting the image as a background. You shouldn't need to set up a camera or anything like that. The only thing I'm not sure of is the transparency. I don't think you can set a transparency to an image applied as a background for a view. But you can edit the image in paint or something and lighten in up a little to give it a faded back appearance if need be. Hope this helps.

 

 

*Expert Elite*
tcorey
Posts: 2,763
Registered: ‎12-18-2002
Message 7 of 9 (551 Views)

Re: Trying to Match Perspective to ViewPort

01-23-2013 04:10 PM in reply to: RCBmstg007

Open your drawing.

 

Bind the Xref as an Insert and Explode it.

 

Run ADERSHEET command.

 

Pick as many Base Points and Reference Points as you design. More points = higher accuracy. Pick a base point on your linework and then pick the reference point on the image in the location that linework base point should be after rubbersheeting.

 

After picking as many base and ref points as you design, press enter. Use the Select option and then select all the linework, but not the image. Hit Enter. If you get  a Map Error dialog, hit close.

 

Best regards,

 

Tim

Tim Corey, Owner
Delta Engineering Systems
Redding, CA
Autodesk Authorized Value-Added Reseller
Valued Contributor
RCBmstg007
Posts: 53
Registered: ‎09-08-2006
Message 8 of 9 (542 Views)

Re: Trying to Match Perspective to ViewPort

01-24-2013 05:21 AM in reply to: RCBmstg007

Thank you so much for the explaination. It did work! I do have one more question; is there a way you can rotate / match the view of the birds eye / oblique photo? So when I go to the top view, it looks like a plan view?

*Expert Elite*
tcorey
Posts: 2,763
Registered: ‎12-18-2002
Message 9 of 9 (528 Views)

Re: Trying to Match Perspective to ViewPort

01-24-2013 01:22 PM in reply to: RCBmstg007

Without knowing the height of the camera and its angle towards the subject of the photo, I don't know how you would do that mathematically.

 

If you want to trial and error it, you could use the Viewcube to spin the view until it looks good, or use the Vpoint command to place the viewpoint where you estimate it should be.

 

If my previous post solved your initial question, please mark it accept as solution so others that might have the same question will be able to quickly find their answer without reading the entire thread. Thanks.

 

Best regards,

 

Tim

Tim Corey, Owner
Delta Engineering Systems
Redding, CA
Autodesk Authorized Value-Added Reseller
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