koobas.hobune.stream
How to get pixel coordinates in an image effect shader
Hi, I want to create a post processing shader. I need the view direction of the current pixel. However I have no idea how to do it.
Thanks but I think I forgot to say that I am not using shader graph. This is my frag shader(currently it just inverts the colors)
float4 frag(v2f_img i) : COLOR
{
float4 c = tex2D(_MainTex, i.uv);
c.rgb = 1 - c.rgb;
return c;
}
That "i.uv" is already the pixel coordinates for your image effect shader. If you want to get the pixel projection on the camera plane of a Vector3 point in the world space, You get that by Camera.WorldToScreenPoint in C# script and then set that to your image effect material.
https://docs.unity3d.com/ScriptReference/Camera.WorldToScreenPoint.html
