A grid shader for Unity 🌐
License: MIT License
A Grid Shader for Unity !
It can scale infinitely (log10 scaling). Main lines will show a one to one grid for the current scale, while secondary lines show up secondary units.
It performs much better than relying on GL lines to draw a grid, has more customization possibilities and works in a lot more situations.
Download the .unitypackage in the Release tab (or checkout and copy the Assets/Plugins/GridShader folder to your Assets folder)
I know it's arguable, but honestly I think that refactoring those
pos.x = floor(frac((i.uv.x - 0.5 * _Thickness) * localScale) + _Thickness * localScale);
pos.y = floor(frac((i.uv.y - 0.5 * _Thickness) * localScale) + _Thickness * localScale);
// ...
pos.x = floor(frac((i.uv.x - 0.5 * _Thickness) * 10.0 * localScale) + _Thickness * 10.0 * localScale);
pos.y = floor(frac((i.uv.y - 0.5 * _Thickness) * 10.0 * localScale) + _Thickness * 10.0 * localScale);
into a util method along the lines of
float xform( float base, float scale ){
return floor(frac((base - 0.5 * _Thickness) * scale) + _Thickness * scale);
}
and then calling them like
pos.x = xform(i.uv.x, localScale);
pos.y = xform(i.uv.y, localScale);
// ...
pos.x = xform(i.uv.x, 10.0 * localScale);
pos.y = xform(i.uv.y, 10.0 * localScale);
would make the code cleaner, more readable and beginner-friendly.
(Obviously, I can do a PR if you prefer that instead of an issue ticket)
as per https://docs.unity3d.com/ScriptReference/Material.SetColor.html , having the property name for the "main" color in the shader set to _Color makes it essentially the 'main' color as far as Unity internals are concerned, allowing easy access to it from code. Arguably, the background color is the main (dominant) color of the grid.
Alternatively, do that with _MainColor instead, if you consider it the 'main' color of this shader. Of course, the string descriptions for them can (and probably should) remain unchanged.
there's the
sampler2D _GridTexture;
float4 _GridTexture_ST;
sampler/texture, but it doesn't seem to be used anywhere. I assume this was intended to be implemented in some way, but currently (unless I'm missing something obvious here) I don't see it handled anywhere in the code, and it's neither set nor accessed anywhere.
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