Comments on: Anaglyphic 3D in GLSL

By: caramish

caramish — Fri, 02 Dec 2011 11:48:28 +0000

Excellent! Thank you so much!

By: r3dux

r3dux — Sat, 26 Nov 2011 23:45:22 +0000

I’ve used the following for trioscopic 3D (green/magenta):

// Final colour output
vFragColour = vec4(rightFrag.r, leftFrag.g, rightFrag.b, 1.0);

And I believe the following will work for ColorCode 3D:

vec3 coefficient = vec3(0.15, 0.15, 0.7);
 
// Take the dot product of the right-eye colour components and specified coefficients
float mixedRightFrag = dot(rightFrag.rgb, coefficient);
 
// Final colour output
vFragColour = vec4(leftFrag.r, leftFrag.g, mixedRightFrag, 1.0);

There’s a good article which shows how do do all this and also remove/minimise the ghosting effect here:
http://iaian7.com/quartz/AnaglyphCompositing.

By: caramish

caramish — Fri, 25 Nov 2011 19:04:13 +0000

hey friend! I have a question… what are the combinations for the left and right frags if i want to make this work for:
red/blue
red/green
as I can see, the one in your code works fine for red/cyan… but what about this other 2?
sorry for my english, thak you.

By: r3dux

r3dux — Mon, 14 Nov 2011 05:09:25 +0000

Alright – try this: ORIG-Anaglyphic-GLSL-with-AA.zip.

It’s a Code::Blocks project and I’ve fixed it so that it doesn’t moan about allocating multisampled buffer storage – keys are W/A/S/D and mouse to move around and F1 to maximise/restore window size.You’ll also need red/cyan 3D glasses

This project is in desperate need of refactoring into classes – as it stands it’s all just mashed together so I could get something up and running in the quickest time possible. Unfortunately, I just don’t have the time to refactor it at the moment, but when/if I do I’ll post an updated version. Also, it doesn’t use asymmetric frustums so it’s quite likely to cause some eye-strain if used for long periods – so use at your own risk!

The best thing to play around with is probably the eyeSeparation value defined on line 54 of main.cpp – larger values increase the separation to increase the 3D effect and make objects appear infront of the screen (up to a certain point where your brain just won’t gel the two images together anymore) , but even small values where the “front” is at the physical screen’s location look pretty good!

Have fun…

By: r3dux

r3dux — Sun, 13 Nov 2011 21:53:41 +0000

The non-anti-aliased code works fine so I could post that up, but the multisample buffer version complains at one point (even though it works and runs as expected) – lemme take a look this evening and I’ll post something up, even if it’s just the non-AA version.

By: tuxy

tuxy — Sun, 13 Nov 2011 20:30:21 +0000

is there any source code?? download??

By: r3dux

r3dux — Tue, 20 Sep 2011 23:08:29 +0000

I never had any ColorCode glasses to try it out with, although I did try with Green/Magenta TrioScopic glasses – and, well, it works – but I wouldn’t have been able to call one over the other, they were just different. Which reminds me that I should prolly post up a final multisampling buffer version with anaglyph cycling options… But regardless, I guess colour reproduction is always going to be dreadful with any anaglyphic method.

Thanks for your anaglyph post, btw – I found it really useful in getting my own stuff up and running. Much appreciated.

By: Nuclear

Nuclear — Tue, 20 Sep 2011 14:02:17 +0000

After trying out various anaglyph glasses, I believe red-cyan are the best. Colorcode try to retain more color, but I find the extreme difference in brightness levels between the left and right eyes very tiring.