stretch figure

stretch figure

sanetdikkumbura1950
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Message 1 of 18

stretch figure

sanetdikkumbura1950
Advocate
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I want to keep this entire figure as 1 fixpoint and stretch point 2 and then stretch point 3 while keeping point 2 the same. How do I do that? Simply put, I want to stretch X and Y.

sanetdikkumbura1950_0-1756901862183.png

 

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Replies (17)
Message 2 of 18

AllenJessup
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Is that an Image that you want to stretch?

Allen Jessup
CAD Manager - Designer
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Message 3 of 18

ianjchap
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Can you scale this using point 1 as the basepoint.

Ian Chapman
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Message 4 of 18

sanetdikkumbura1950
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no. i need to stretch cad figure.

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Message 5 of 18

sanetdikkumbura1950
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Advocate

I want to stretch X and Y separately. cad file not image

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Message 6 of 18

AllenJessup
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Mentor

Is there a reason why you want to stretch them separately rather than using the Scale command? Results should be the same. Also. If the labels are Civil 3D dynamic labels. All the distances will change.

Allen Jessup
CAD Manager - Designer
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Message 7 of 18

RobertEVs
Advisor
Advisor

I figured on insert you would get the option to X,Y,Z scale but that does not come up with this particular block when inserted. This image is for another north arrow block, and this is the options at the command line. Not the same with your extract block. Perhaps because it's a dynamic block?

RobertEVs_0-1756906025052.png

RobertEVs_0-1756906485817.png

 

 

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Message 8 of 18

RobertEVs
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Advisor

Start a new drawing and insert this extract block from libraries. Find your drawing and you will get the scale options.

 

RobertEVs_0-1756906704338.png

 

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Message 9 of 18

AllenJessup
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Mentor

In order to change the X,Y scales you would have to explode the block and then recreate it removing the Scale Uniformly option.

 

AllenJessup_0-1756907127575.png

 

Allen Jessup
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Message 10 of 18

RobertEVs
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Thats why the Y and Z were greyed out. 

Good to know.

Required: memory of an elephant as a Civil 3D user.

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Message 11 of 18

sanetdikkumbura1950
Advocate
Advocate

@AllenJessup I want to superimpose it on top of the main drawing. When I scale it normally, the whole figure will not be fixed.

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Message 12 of 18

AllenJessup
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Mentor

If you scale on point #1 by 78.25508607199. You will get very close to matching the distances in the block. It seems that the line length in the block are a bit off. It also seem you have everything in the block already draw out. So you could use that as reverence for scaling.

Allen Jessup
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Message 13 of 18

AllenJessup
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The drawing was brought in from a PDF, possibly a Scan. There is some intrinsic warping in the PDF so the exact scale for one portion of the drawing isn't precise for other parts. The best you can hope to do is a series of Scale/Move and possibly Rotate until you get a good enough fit.

Allen Jessup
CAD Manager - Designer
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Message 14 of 18

AllenJessup
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If you need linework this won't work. However, if you save the PDF to a Raster file. You can use Raster Design to Rubber Sheet the image.

https://help.autodesk.com/view/RSTR/2024/ENU/?guid=GUID-2A84445E-5A05-42DE-A719-7F17B3686564

Allen Jessup
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Message 15 of 18

sanetdikkumbura1950
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Advocate

@AllenJessup Thanks lot. please Can you please share the file you created?

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Message 16 of 18

AllenJessup
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Mentor

This is not perfect. It's based on a couple of Scales and a Move. If you measure lines from the PDF that are supposed to be equal. You will see that some are not. The difference was small in the original PDF. But after as 78+ time scale. They become more noticable.

Allen Jessup
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Message 17 of 18

sanetdikkumbura1950
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@AllenJessup 
What tool did you use to do this? It's not clear to me.

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Message 18 of 18

AllenJessup
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Mentor

I did it by iteration. I held the point you specified to hold, 1. Then I did some trial scaling until I got the closest match I could get. As I said. The dimensions in the PDF are not precise. So the match will never be perfect. With rubber sheeting an image in Raster Design you might get closer. But you'll never be perfect.

Since you have the boundaries drawn you're probably looking for the contour lines or text. You can settle for close enough.

Allen Jessup
CAD Manager - Designer
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