Printing and screen-grabing anaglyph mode

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MJJ
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Joined: Wed Feb 22, 2017 12:57 pm

Printing and screen-grabing anaglyph mode

Post by MJJ »

Hi Daniel,

Thank you very much for an awesome piece of software!

When using the stereoscopic 3d anaglyph mode (red--blue in this case) I'm having some difficulty presenting those views outside of CC. With the default background colour and gradient the red--blue points are relatively easy to pick up on the monitor, and with glasses I get the 3D "feel". However:
  • Rendering (Display->Render to File) ignores any applied stereoscopic effect
  • Screenshots keeps the feel when viewed on the monitor, but is impossible to when printing (due to the background color)
  • Changing the background color to white, changes the red--blue dots to become yellow--cyan
So do you have any hints for how I can achieve the 3d anaglyph on print from Cloud-Compare? I'm suspecting this to be a CMYK/RGB (subtractive/additive) color thing? Inverting the colors, e.g. in photoshop, gets you nowhere as the background would revert to black also :)

Martin
daniel
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Re: Printing and screen-grabing anaglyph mode

Post by daniel »

Well, I don't really know, this feature has never been meant to produce images that can be exported :D

I'll see if at least this mode can be properly handled when 'rendering' the screen as an image.

But for the black background I remember that I struggled a lot to make this work with any background and I finally had to force the black background. Maybe the white background is easier than 'any' background? I'll have to test this... when I found some time.
Daniel, CloudCompare admin
PointGeo
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Joined: Sat Jan 13, 2018 7:00 pm

Re: Printing and screen-grabing anaglyph mode

Post by PointGeo »

Hi

I am also curious to why the anaglyph frames will not render in the animation plugin.Or am I missing something?

Thanks in advance,
Tomas
daniel
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Re: Printing and screen-grabing anaglyph mode

Post by daniel »

I can't remember why it wouldn't work. I'll have to dig into the code and I'll report back ;)
Daniel, CloudCompare admin
daniel
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Re: Printing and screen-grabing anaglyph mode

Post by daniel »

Okay, I finally understood!

It's probably because your viewports have been created with an 'ortho' projection. If you apply such a viewport while the stereo mode is enabled, it will break the stereo mode.

Make sure you create the viewports with a perspective projection, and it should work fine.

I've updated the latest 2.10.alpha version so that it outputs a warning message in the console when an 'ortho' viewport is set while the stereo mode is enabled (and the stereo mode will be automatically disabled by the way).
Daniel, CloudCompare admin
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