ThemeColorPicker.shader

Shader "Treesleeper/ThemeColorPickerPulse" 
{
    Properties 
    {
        _MainTex ("Base Texture", 2D) = "black" {}  // Base texture property
        [IntRange]_ThemeColorIndex ("Theme Color Index", Range(0, 3)) = 0  // Theme color index property, range limited to 0-3, initialized to 0
        [IntRange]_Band("Band", Range(0, 3)) = 0  // Audio link band
        [IntRange]_Smooth("Smoothing", Range (1, 15)) = 10 // Audio link smoothing
    }

    SubShader 
    {
        Tags { "RenderType"="Opaque" }
        LOD 100

        Pass 
        {
            Blend SrcAlpha OneMinusSrcAlpha

            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            #include "UnityCG.cginc"
            #include "Packages/com.llealloo.audiolink/Runtime/Shaders/AudioLink.cginc"

            struct appdata {
                float4 vertex : POSITION;
                float2 uv : TEXCOORD0;
            };

            struct v2f {
                float2 uv : TEXCOORD0;
                float4 vertex : SV_POSITION;
            };

            // Declare the _MainTex property
            sampler2D _MainTex;
            float4 _MainTex_ST;
            float _ThemeColorIndex;
            float _Band;
            float _Smooth;

            v2f vert (appdata v) {
                v2f o;
                o.vertex = UnityObjectToClipPos(v.vertex);
                o.uv = v.uv;
                return o;
            }

            fixed4 frag (v2f i) : SV_Target {
                float2 uv = i.uv;
                uint2 themeColorSet;
                if (_ThemeColorIndex == 0)
                    themeColorSet = ALPASS_THEME_COLOR0;
                else if (_ThemeColorIndex == 1)
                    themeColorSet = ALPASS_THEME_COLOR1;
                else if (_ThemeColorIndex == 2)
                    themeColorSet = ALPASS_THEME_COLOR2;
                else if (_ThemeColorIndex == 3)
                    themeColorSet = ALPASS_THEME_COLOR3;

                // Get theme color from AudioLink
                fixed3 themeColor = AudioLinkData(themeColorSet).rgb;
                // Get the current band color from AudioLink
                fixed bandColor;
                if (_Smooth == 0)
                    bandColor = AudioLinkData(int2(0, clamp(_Band, 0, 3))).r;
                else
                    bandColor = AudioLinkData( ALPASS_FILTEREDAUDIOLINK + int2(16 - _Smooth, clamp(_Band, 0, 3))).r;

                // Sample the texture overlay
                float4 col = tex2D(_MainTex, uv);
                // Apply the color change, band sets alpha
                themeColor = lerp(themeColor, col.rgb, 1.0 - bandColor.r); 
                return fixed4(themeColor, 1); // Return the final color
            }

            ENDCG
        }
    }
    FallBack "Diffuse"
}