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How do I force perspective of a subtree?

Q and A about functionality and how to solve a special task for your application.

Moderator: Support

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robertwinter
Posts: 49
Joined: 27 Nov 2012, 21:53

How do I force perspective of a subtree?

Post by robertwinter » 12 Jul 2018, 00:08

How can I force perspective of a subtree?

Here's a simple example. I have three rectangles that I have rotated slightly about the Y axis. Each rectangle is at a different location on the Y axis. As you can see, the perspective is based on the same view for all rectangles.
perspective.jpg

But I want each of the rectangles to have the perspective as the one in the center of the screen. Like below. (see next post)


How do I achieve this?
Last edited by robertwinter on 12 Jul 2018, 00:10, edited 1 time in total.

robertwinter
Posts: 49
Joined: 27 Nov 2012, 21:53

Re: How do I force perspective of a subtree?

Post by robertwinter » 12 Jul 2018, 00:10

Desired result.
forced perspective.jpg

chriss0212
Posts: 666
Joined: 18 Jan 2012, 20:56
Location: wuppertal
Contact:

Re: How do I force perspective of a subtree?

Post by chriss0212 » 12 Jul 2018, 10:33

Hi Robert

i would say: if you need different views, you need different cameras. Each camera should have an offset in y.

Greetings

Christian

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lerou
Posts: 345
Joined: 06 Sep 2013, 07:14
Location: Hamburg, Germany

Re: How do I force perspective of a subtree?

Post by lerou » 13 Jul 2018, 10:34

Actually you need a different viewport transformation. Use the viewport node... oh, it's not V4 any more. V5. Ok. Well, use a different layer for each of the elements and then use the layer layout to shift the content (i.e. change the viewport transformation).

Let me guess: putting the content into different layers is not a feasable solution in your case?

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Dennis
Posts: 384
Joined: 08 Jun 2015, 11:29

Re: How do I force perspective of a subtree?

Post by Dennis » 13 Jul 2018, 11:38

Couldnt this be solved by using stencils?
Use Inkscape in the end to create a SVG, which is already correctly deofrmed?
or the least would be to misuse a 3d artist to create geometries...
PerspRect_01.vza
(8.88 KiB) Downloaded 148 times
regArts
Dee

:ugeek:

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lerou
Posts: 345
Joined: 06 Sep 2013, 07:14
Location: Hamburg, Germany

Re: How do I force perspective of a subtree?

Post by lerou » 13 Jul 2018, 11:47

I think his rectangles were just a means to illustrate what he is intending to do.

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Dennis
Posts: 384
Joined: 08 Jun 2015, 11:29

Re: How do I force perspective of a subtree?

Post by Dennis » 13 Jul 2018, 12:05

lerou wrote:
13 Jul 2018, 11:47
I think his rectangles were just a means to illustrate what he is intending to do.
Thanks for that...

another very useful way to create such rectangles without Inkscape or a 3dtool just inside of ventuz is:

Create a rectangle, add a material node, add a Vertex noise stage and adjust the XY Values for the Frequency and amount.. leaving the Z at 0.
Or just deform the Y values.

copy the stuff and you have exactly the same mesh and shape...
deform.jpg
regArts
Dee

:ugeek:

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