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Question Texture arrays in URP

Discussion in 'Universal Render Pipeline' started by Hakazaba, Sep 16, 2020.

  1. Hakazaba

    Hakazaba

    Joined:
    Jul 1, 2015
    Posts:
    119
    Hi, in unityCG you can initialize a texture array in a shader using UNITY_DECLARE_TEX2DARRAY however in URP this is unrecognized and unityCG has its own errors if you try to use it. How do i use a 2D texture array in URP shaders?
     
    Hakazaba, Sep 16, 2020
    #1

  2. Simon_E_Sorensen

    Simon_E_Sorensen

    Unity Technologies

    Joined:
    Feb 4, 2020
    Posts:
    10
    Hi Hakazaba,
    Great question - with URP you use:
    TEXTURE2D_ARRAY(_ArrayName); and
    SAMPLER(sampler_ArrayName);

    And to sample the array you use:
    SAMPLE_TEXTURE_2D_ARRAY(_ArrayName, sampler_ArrayName, uv-coords(IN.uv), index(0,1,2...));

    If you are interested to look at the shader API, you can look at the definitions(per platform) here: https://github.com/Unity-Technologi...unity.render-pipelines.core/ShaderLibrary/API

    Hope this helps, and if not, feel free to ask any further questions.
     
    Simon_E_Sorensen, Sep 18, 2020
    #2
    wsdfw, CyrilGhys, ehab-alkhazrajy and 1 other person like this.

  3. Loofou

    Loofou

    Joined:
    Aug 22, 2012
    Posts:
    25
    Sorry to hijack the thread, but I have a related question:
    Do texture arrays need to be part of the cbuffer for the srp batcher to work? If so, how do we declare them properly?
     
    Loofou, Jan 28, 2021
    #3

  4. aleksandrk

    aleksandrk

    Unity Technologies

    Joined:
    Jul 3, 2017
    Posts:
    2,850
    Textures cannot be part of cbuffers.
     
    aleksandrk, Jan 29, 2021
    #4

  5. quizcanners

    quizcanners

    Joined:
    Feb 6, 2015
    Posts:
    108
    It should be
    SAMPLE_TEXTURE2D_ARRAY
    not
    SAMPLE_TEXTURE_2D_ARRAY
    (no underscore)

    Just to save people some time)
     
    quizcanners, Sep 5, 2023
    #5