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


Shader "Custom/DoubleTransparent" {
	Properties{
		_MainTex("Main Text", 2D) = "white" {}
		[HDR]_Color ("Color Tint", Color) = (1, 1, 1, 1)
		_Magnitude ("Distortion Magnitude", Float) = 1
 		_Frequency ("Distortion Frequency", Float) = 1
 		_InvWaveLength ("Distortion Inverse Wave Length", Float) = 10
 		_Speed ("Speed", Float) = 0.5
		_AlphaScale("AlphaScale",Range(0,1))=1
	}
		SubShader{
			Tags { "Queue" = "Transparent+1" "DisableBatching"="True"}
			Pass
			{
				Blend SrcAlpha OneMinusSrcAlpha
                Cull Off
				ZWrite Off
				CGPROGRAM
				#pragma vertex vert
				#pragma fragment frag
				#include "UnityCG.cginc"

				sampler2D _MainTex;
				float4 _MainTex_ST;
				fixed4 _Color;
				float _Magnitude;
				float _Frequency;
				float _InvWaveLength;
				float _Speed;
				float _AlphaScale;

				struct appdata
				{
					float4 vertex : POSITION;
					
					float4 texcoord : TEXCOORD0;
				};

				struct v2f
				{
					float4 pos : SV_POSITION;
					float2 uv: TEXCOORD1;
				};

				v2f vert(appdata v)
				{
					v2f o;
				
				float4 offset;
				offset.xzw = float3(0.0, 0.0, 0.0);
				offset.y = sin(_Frequency * _Time.y + v.vertex.x * _InvWaveLength + v.vertex.y * _InvWaveLength + v.vertex.z * _InvWaveLength) * _Magnitude;
				o.pos = UnityObjectToClipPos(v.vertex + offset);
				
				o.uv = TRANSFORM_TEX(v.texcoord, _MainTex);
				o.uv +=  float2(0.0, _Time.y * _Speed);
				
				return o;
				}

				float4 frag(v2f i) : SV_Target
				{
					fixed4 c = tex2D(_MainTex, i.uv);
				c.rgb *= _Color.rgb;
				c.a *=_AlphaScale;
				
				return c;
				}
				ENDCG
			}
			Pass {
			Tags { "LightMode" = "ShadowCaster" }
			
			CGPROGRAM
			
			#pragma vertex vert
			#pragma fragment frag
			
			#pragma multi_compile_shadowcaster
			
			#include "UnityCG.cginc"
			
			float _Magnitude;
			float _Frequency;
			float _InvWaveLength;
			float _Speed;
			
			struct v2f { 
			    V2F_SHADOW_CASTER;
			};
			
			v2f vert(appdata_base v) {
				v2f o;
				
				float4 offset;
				offset.xzw = float3(0.0, 0.0, 0.0);
				offset.y = sin(_Frequency * _Time.y + v.vertex.x * _InvWaveLength + v.vertex.y * _InvWaveLength + v.vertex.z * _InvWaveLength) * _Magnitude;
				v.vertex = v.vertex + offset;

				TRANSFER_SHADOW_CASTER_NORMALOFFSET(o)
				
				return o;
			}
			
			fixed4 frag(v2f i) : SV_Target {
			    SHADOW_CASTER_FRAGMENT(i)
			}
			ENDCG
		}
	}
}