Software:
Unreal Engine 4.26
When sampling textures using an HLSL custom node,
The UE4 TextureObject input name, will automatically have a sampler object generated named:
<your TextureObject name>sampler
For example, if you named your TextureObject input “tex_in”, the available sampler will be named “tex_insampler”.
So the code for sampling the texture will be:
Texture2DSample(tex_in, tex_inSampler, coords);The following is an example of a simple u-blur custom node code, with 4 node inputs:
1. tex_in – TextureObject
2. coords – float2
3. size – float
4. sample – float
int blur_samples = int(samples * 0.5f);
float3 col = 0.0f;
float2 sample_coords = 0.0f;
for (int i = -blur_samples; i < blur_samples; i ++)
{
sample_coords.x = i * (size / blur_samples * 2);
col += Texture2DSample(tex_in, tex_inSampler, coords + sample_coords ) / (blur_samples * 2);
}
return col;The above code can typed directly in the Custom node’s Code field. or loaded from an external .usf file.
