// Upgrade NOTE: replaced 'mul(UNITY_MATRIX_MVP,*)' with 'UnityObjectToClipPos(*)'

Shader "Fluvio/Fluid Effect"
{
    Properties
    {
        // Diffuse/alpha
        _Color ("Color", Color) = (0.75,0.75,0.75,0.5)
        _MainTex ("Albedo", 2D) = "white" {}
		_Cutoff ("Alpha Cutoff", Range(0.001, 1.0)) = 0.5
		_Cutoff2 ("Shadow/Depth Alpha Cutoff", Range(0.001, 1.0)) = 0.05

        // Smoothness/metallic
        _Glossiness ("Smoothness", Range(0.0, 1.0)) = 0.5
		[Gamma] _Metallic ("Metallic", Range(0.0, 1.0)) = 0.8
        _MetallicGlossMap ("Metallic", 2D) = "white" {}
        
        // Normal
        _BumpScale ("Scale", Float) = 0.5
        _BumpMap ("Normal Map", 2D) = "bump" {}
        
        // Emission
        _EmissionColor ("Color", Color) = (0,0,0,0)
        _EmissionMap ("Emission", 2D) = "white" {}

        // Vertex colors
        [KeywordEnum(None, Albedo, Specular, Emission)] _VertexColorMode ("Vertex color mode", Float) = 1
        
		// Culling
		[HideInInspector] _CullFluid ("Cull Fluid", Float) = -1.0

        // UI-only data
        [HideInInspector] _EmissionScaleUI ("Scale", Float) = 0.0
        [HideInInspector] _EmissionColorUI ("Color", Color) = (0,0,0,0)
        
        // Image effect (passed to composite shader)
        [HideInInspector] _DownsampleFactorUI ("Downsample Factor", Float) = 1.0
        [HideInInspector] _FluidBlurUI ("Blur Fluid", Range(0,1)) = 0.25
		[HideInInspector] _FluidBlurBackgroundUI ("Blur Background", Range(0,1)) = 0
        [HideInInspector] _FluidSpecularScaleUI ("Fake Specular Effect", Range(0.0, 1.0)) = 0
        [HideInInspector] _FluidTintUI ("Composite Tint Color", Color) = (1,1,1,1)     
    }

    CGINCLUDE
        #define _GLOSSYENV 1
        #define FLUVIO_SETUP_BRDF_INPUT FluvioMetallicSetup
    ENDCG

    SubShader
    {
        Tags { "Queue"="Transparent" "IgnoreProjector"="True" "RenderType"="Fluvio" "PerformanceChecks"="False" }
        
		// ------------------------------------------------------------------
        //  Depth pass
        Pass 
        {  
			ZWrite On ZTest Always ColorMask 0
			//Blend One One

			CGPROGRAM
                #pragma vertex vert
                #pragma fragment frag
                #include "UnityCG.cginc"

				fixed4 _Color;
				sampler2D _MainTex;
				float _Cutoff2;				

				struct appdata_t
				{
					float4 vertex   : POSITION;
					float2 texcoord : TEXCOORD0;
				};

				struct v2f
				{
					float4 vertex   : SV_POSITION;
					half2 texcoord  : TEXCOORD0;
				};

				v2f vert(appdata_t v)
				{
					v2f o;
					o.vertex = UnityObjectToClipPos(v.vertex);
					o.texcoord = v.texcoord;
					return o;
				}

				fixed4 frag(v2f i) : COLOR
				{
					fixed4 c = tex2D(_MainTex, i.texcoord);
					clip(_Color.a < 1 ? -1 : c.a - _Cutoff2);
					return c.a;
				}
            ENDCG
			
        }
        // ------------------------------------------------------------------
        //  Shadow rendering pass
        Pass 
		{
            Name "ShadowCaster"
            Tags { "LightMode" = "ShadowCaster" }
            
            ZWrite On ZTest LEqual
            
            CGPROGRAM
            #pragma target 3.0
            // TEMPORARY: GLES2.0 temporarily disabled to prevent errors spam on devices without textureCubeLodEXT
            #pragma exclude_renderers gles
            
            // -------------------------------------

            #pragma multi_compile _VERTEXCOLORMODE_NONE _VERTEXCOLORMODE_ALBEDO _VERTEXCOLORMODE_SPECULAR _VERTEXCOLORMODE_EMISSION

            #pragma shader_feature _ _ALPHATEST_ON _ALPHABLEND_ON
            #pragma multi_compile_shadowcaster

            #pragma vertex vertShadowCaster
            #pragma fragment fragShadowCaster

            #include "FluidEffectShadow.cginc"

            ENDCG
        }	
    }
	CustomEditor "Thinksquirrel.FluvioEditor.Inspectors.FluidEffectShaderInspector"
}