SpriteShadows

SpriteShadows.shader

Shader "Sprites/SpriteShadows"
{
    Properties
    {
        [PerRendererData] _MainTex ("Sprite Texture", 2D) = "white" {}
        _Color ("Tint", Color) = (1,1,1,1)
        _Cutoff ("Shadow alpha cutoff", Range(0,1)) = 0.5
        _Intensity("Shadow Intensity", Range(0,1)) = 0.5
    }
 
    SubShader
    {
        Tags
        {
            "Queue"="AlphaTest"
            "IgnoreProjector"="True"
            "RenderType"="TransparentCutout"
            "PreviewType"="Plane"
            "CanUseSpriteAtlas"="True"
        }
 
        LOD 200
        Cull Off
        Lighting On
        ZWrite Off
 
        CGPROGRAM
        #pragma surface surf ShadowLambert addshadow alphatest:_Cutoff

        #include "Lighting.cginc"
        sampler2D _MainTex;
        fixed4 _Color;
        float  _Intensity;
         
 
        struct Input
        {
            float2 uv_MainTex;
        };

        half4 LightingShadowLambert (SurfaceOutput s, half3 lightDir, half atten) 
        {
	          half NdotL = dot (s.Normal, lightDir);
	          half4 c;
	          atten = (NdotL * atten)  - _Intensity;

	          if ( atten <= 0 )
	          {
	          		c.rgb = s.Emission *  atten * _LightColor0.a ;
	          }
	          else 
	          {
	          		c.rgb = 0;
	          }

	          c.a = s.Alpha;
	          return c;
        }

        void surf (Input IN, inout SurfaceOutput o)
        {
            fixed4 c = tex2D(_MainTex, IN.uv_MainTex) * _Color;         
            o.Alpha = c.a;
            o.Emission = c.rgb;
        }
        ENDCG
    }
 
    Fallback "Legacy Shaders/Transparent/Cutout/VertexLit"
}