Ch6Multiply.shader

Shader "CookbookShaders/Multiply" 
{
	Properties 
	{
		_Color ("Color", Color) = (1, 0, 0, 1)
		_MainTex ("Base (RGB) Trans (A)", 2D) = "white" {}
	}
	SubShader 
	{
		Pass
		{
			CGPROGRAM
		
			#pragma vertex vert
			#pragma fragment frag

			half4 _Color;
			sampler2D _MainTex;

			struct vertInput
			{
				float4 pos : POSITION;
				float2 texcoord : TEXCOORD0;
			};

			struct vertOutput
			{
				float4 pos : SV_POSITION;
				float2 texcoord : TEXCOORD0;
			};

			vertOutput vert(vertInput input)
			{
				vertOutput o;
				o.pos = mul(UNITY_MATRIX_MVP, input.pos);
				o.texcoord = input.texcoord;
				return o;
			}

			half4 frag(vertOutput output) : COLOR
			{
				half4 mainColor = tex2D(_MainTex, output.texcoord);
				return mainColor * _Color;
			}

			ENDCG
		}
	}
}