Home/ Questions/Q 7032729
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-28T00:58:23+00:00

The problem is this, I have input from a camera in 240×160 res, I

  • 0

The problem is this, I have input from a camera in 240×160 res, I place it in a 256×256 texture.

I then map it to a quad [0..240/256] on the U, and [0..160/256] on the V. Works fine, but the problem is I am rendering to a buffer…

The buffer is the correct ratio because I don’t want to do more pixels than is nessasary. Then I come to apply a different effect and render to the next buffer. But by this point I have to use the range [0..1] on both U and V and so my aspect ratio has been lost.

The problem is that my pixel shader effects can rely on aspect ratio, for example, a water ripple needs to calculate distance from the centre.

I can fix the problem in the shaders, but ideally at the second (or more) pass I want to set the UV range so that aspect ratio is preseved.

Can I do this?

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    Texture coordinates are always from [0,1] in OpenGL ES. You’ll have to either pass in the aspect ratio as a uniform, or create your texture with the same aspect ratio to begin with.

    • 0