charred igloo
I have a Camera that has its own unique Render Pipeline. I am trying to do edge detection as full-screen passes.
I am struggling to get access to the camera's blit Normal of the scene. How do you access the normal?
I've gotten access to color and depth by doing stuff like shown, but how do I get the normals from the blit in the same way?
pseudo coral
I have a Camera that has its own unique Render Pipeline. I am trying to do edge ...
The normals texture is stored in the global texture reference _CameraNormalsTexture
There's a DeclareNormalsTexture.hlsl include file in the URP ShaderLibrary which declares it for you, and provides sample function
charred igloo
Is this how I access that?
I got an error about redefinition, but I ALSO get a different error if I dont include
//TEXTURE2D_X(_CameraNormalsTexture);
{
uv = ClampAndScaleUVForBilinear(UnityStereoTransformScreenSpaceTex(uv), _CameraNormalsTexture_TexelSize.xy);
float3 normal = SAMPLE_TEXTURE2D_X(_CameraNormalsTexture, samplerParam, uv).xyz;
#if defined(_GBUFFER_NORMALS_OCT)
float2 remappedOctNormalWS = Unpack888ToFloat2(normal); // values between [ 0, 1]
float2 octNormalWS = remappedOctNormalWS.xy * 2.0 - 1.0; // values between [-1, +1]
normal = UnpackNormalOctQuadEncode(octNormalWS);
#endif
return normal;
}```Looking at this from the code you linked
I am not sure how to use these methods from within my HLSL shader graph custom node
can I just invoke those methods? How will it know what/where to look?
pseudo coral
I got an error about redefinition, but I ALSO get a different error if I dont in...
It's probably defined already in the final Fullscreen shader, but not in shaders generated for graph previews
charred igloo
Thats why I explicitly dont try to access it if its the preview atm
{
uint2 pixelCoords = uint2(uv * _ScreenSize.xy);
//return LOAD_TEXTURE2D_X_LOD(_CameraNormalsTexture, pixelCoords, 0);
return SAMPLE_TEXTURE2D_X(_CameraNormalsTexture, samplerParam, uv).xyz;
}```I guess to acess normals I should do something like this?
But I don't have a sampler to pass in
Where do you get a texture sampler in a full screen renderer feature pass 
pseudo coral
URP uses inline samplers for fullscreen textures, usually sampler_PointClamp which is already defined by URP's shaderlibrary
charred igloo
Ooh I see
Like this:
Thanks, that got me the Normals 👀 now I can move forward on my edge detection
charred igloo
@pseudo coral Following up on this I realized I also need the Texel size for the outline shader
I can see the name of it in the code you linked, but when I try to reference that variable, I get an Undeclaired Identifier error
Hm adding this at the top seemed to have worked?
the same way they define it outside the scope