Set texture sampler state in custom effect

Graphics
1

If I have a custom effect that define a texture sampler like this:

sampler2D MainTextureSampler = sampler_state {
	Texture = (MainTexture);
	MinFilter = Linear;
	MagFilter = Linear;
	AddressU = Clamp;
	AddressV = Clamp;
};

How can I change the MinFilter / MagFilter / AddressU / AddressV params from C# code? I looked at all the options of SetValue() of shader parameters and didn’t find anything that match sampler state.

Thanks!

2

Try using graphicsDevice.SamplerStates[n] = mySamplerState, where n is the index of the sampler state in your shader.

1 Like
3

This only works for default effects… Not what I posted above.

Edit: never-mind I just realized I can create the sampler state without params, eg like this:

sampler2D MainTextureSampler = sampler_state { Texture = (MainTexture); }

And in this case it works. Thanks!

4

This works for all shaders, just use the SamplerState like this:

SamplerState mySamplerState = new SamplerState()
{
   AddressU = TextureAddressMode.Wrap,
   AddressV = TextureAddressMode.Wrap,
   Filter = TextureFilter.LinearMipPoint
}

You can use e.g. SamplerComparisonState defined this way for your shadow maps etc.