Non-uniform scaling (scaling along 1 axis)

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benDragon81037
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Joined: Sat Feb 06, 2016 8:48 pm

Non-uniform scaling (scaling along 1 axis)

Post by benDragon81037 » Sat Feb 06, 2016 10:20 pm

Hey there.

There's a problem with the inability to scale along a certain axis. The problem originates from trying to convert bitmap into a vector format (I've found .dwg and .dxf file formats suitable file types as they preserve dimensions).

During the conversion, there's normally 3 projections, there's the top production, the side projection and the front projection, after tracing over the bitmap I find that the projections don't line up like they should and the only way to fix this defect is to scale non-uniformly because scaling uniformly would shift the problem to other projections.

Is there anything I can do to fix this problem?

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Husky
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Re: Non-uniform scaling (scaling along 1 axis)

Post by Husky » Sun Feb 07, 2016 2:37 am

Hi benDragon81037 - welcome to the forum!

It's hard to say without knowing the layout of your drawing but maybe the "Stretch" tool would be an option to fix the problem ...



But it would be much easier for us to help you if we could see the drawing or an example drawing .... :wink:
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benDragon81037
Junior Member
Posts: 12
Joined: Sat Feb 06, 2016 8:48 pm

Re: Non-uniform scaling (scaling along 1 axis)

Post by benDragon81037 » Sun Feb 07, 2016 2:06 pm

That video's quite hard to follow especially without annotations / sound.

My problem is basically this:
Image

What the diagonal line to the bottom right denotes, is whether the width of the front view matches the width of the front view.
Image

But here, you can see that the width doesn't match, which is to be expected with such a pixelated image.

What I'd like to do, would be to scale it horizontally so that the width of the projections match.

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Husky
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Posts: 2523
Joined: Wed May 11, 2011 9:25 am
Location: USA

Re: Non-uniform scaling (scaling along 1 axis)

Post by Husky » Sun Feb 07, 2016 8:06 pm

benDragon81037 wrote:What I'd like to do, would be to scale it horizontally so that the width of the projections match.
Well, then you have to use the scale tool (Modify menu) just in X direction or you could use the mouse ( in the same dialog) to obtain the proper ratio for the scaling ....

http://www.qcad.org/doc/qcad/latest/ref ... le_en.html

Example for a nominal / actual comparison in x direction:
Husky-2016.02.07-03.png
Husky-2016.02.07-03.png (25.51 KiB) Viewed 2137 times
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benDragon81037
Junior Member
Posts: 12
Joined: Sat Feb 06, 2016 8:48 pm

Re: Non-uniform scaling (scaling along 1 axis)

Post by benDragon81037 » Sun Feb 07, 2016 8:11 pm

It's greyed out for me and I can't seem to unlock it.

Edit: Never mind, thank you.

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