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Grabbing Point Light intensity in URP Shader

Discussion in 'Universal Render Pipeline' started by psuong, Jun 1, 2022.

  1. psuong

    psuong

    Joined:
    Jun 11, 2014
    Posts:
    118
    In the builtin render pipeline _LightColor0 is a pretty convenient variable, if you want to grab the color/intensity of a light. However, in URP, _LightColor0 is no longer valid for point lights, instead they are grabbed via GetAdditionalLights in Lighting.hlsl.

    In the light struct, the color variable, is equal to the Light's baseColor * intensity. If the baseColor and intensity can be any value, is there a convenient way to determine the intensity of the point light?

    I'm currently on URP 12.1.6.
     
    psuong, Jun 1, 2022
    #1
    Sam_Hedges likes this.

  2. honeyeoz

    honeyeoz

    Joined:
    Nov 10, 2020
    Posts:
    2
    I use this experience formula to calculate intensity value.

    0.299 * light.color.r + 0.587 * light.color.g + 0.114 * light.color.b
     
    honeyeoz, Nov 28, 2022
    #2

  3. honeyeoz

    honeyeoz

    Joined:
    Nov 10, 2020
    Posts:
    2
    BTW how to get point light range value in urp shader?
     
    honeyeoz, Nov 28, 2022
    #3