_MainTex_TexelSize what's the meaning?

uniform float4 _MainTex_TexelSize
where is the value of the float4 _MainTexelSize from?

It‘s set by the application if it‘s present in the shader - it is the size of a texel of the texture in question, in other words, if it‘s a 1k x 1k texture, both x and y will be 1.0/1024.0

_MainTex_TexelSize is set by magic sauce in the darkness of Unity‘s source code.

It follows the dimensions of the _MainTex sampler and has these contents:

Vector4(1 / width, 1 / height, width, height)

https://forum.unity3d.com/threads/_maintex_texelsize-whats-the-meaning.110278/

_MainTex_TexelSize what's the meaning?

时间： 2024-10-01 05:21:02

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