Changing the projection matrix

[Nash]

Where in the code is GZDoom doing the aspect ratio correction? I'd like to get rid of the view stretching for my project.

[Gez]

More importantly, stretching should be done in the model view matrix anyway.

[NeuralStunner]

I'd still quite like a mod-available setting for both GL and software. (As many folks as are using widescreen nowadays, I don't think it would hurt visibility. Personally I'd hate seeing screenshots of my mod stretched the hell out when a cube should really be a cube.)

[Nash]

The aspect ratio stretching is currently done in the projection matrix but that's the wrong place

This is what I'd like to find, so I can "undo" the stretching. Changing the code to do stretching in the modelview matrix seems like a huge change. I just want a "quick fix"...

[Nash]

Any help with this please? I really need to get rid of the stretching for my game project...

[Nash]

Well I found this under FGLRenderer::RenderView in gl_scene.cpp:

Code: Select all

#define RMUL (1.6f/1.333333f)

Changing it to 1.0f seems to do what I want it to do. Tested in all aspect ratios too, seems to work.

[Enjay]

I'm intrigued how does it look - both with your mod and when running a Doom game?

[Nash]

Hi Enjay, sorry for the late reply.

I don't have much to show yet, but I guess you can see the difference in these WIP shots.

4:3

Square pixels:



Squashed pixels:



16:10

Square pixels:



Squashed pixels:



(DISCLAIMER: Car model is a placeholder by real_trisk and WILL NOT BE USED in final production. It was added just to demonstrate the scaling)

It seems that with square pixels, the horizontal FOV does become slightly smaller, but I'm sure that can be compensated by altering the FOV code so that 1:1 pixels match the FOV of 1:1.2 pixels...