Initial Commit

Assets/Plugins/Light2D/Resources/Shaders/NormalMappedLight.shader

@@ -0,0 +1,72 @@
+// Upgrade NOTE: replaced 'mul(UNITY_MATRIX_MVP,*)' with 'UnityObjectToClipPos(*)'
+
+/*
+
+Used to create normal map buffer.
+
+*/
+
+Shader "Light2D/Internal/Normal Mapped Light" {
+SubShader {
+	Tags {"Queue"="Transparent" "IgnoreProjector"="True" "RenderType"="Transparent"}
+	LOD 100
+	
+	ZWrite Off
+	Blend OneMinusDstColor One
+
+	Pass {  
+		CGPROGRAM
+			#pragma vertex vert
+			#pragma fragment frag
+			
+			#include "UnityCG.cginc"
+
+			struct appdata_t {
+				float4 vertex : POSITION;
+				//float2 texcoord : TEXCOORD0;
+			};
+
+			struct v2f {
+				float4 vertex : SV_POSITION;
+				half2 normalTexcoord : TEXCOORD0;
+				half2 lightTexcoord : TEXCOORD1;
+				half3 lightPos : TEXCOORD2;
+			};
+
+			uniform sampler2D _MainTex;
+			uniform sampler2D _NormalsBuffer;
+			uniform half3 _LightPos;
+
+			v2f vert (appdata_t v)
+			{
+				v2f o;
+				o.vertex = UnityObjectToClipPos(v.vertex);
+				o.normalTexcoord = o.vertex*0.5 + 0.5;
+				o.lightTexcoord = o.vertex*0.5 + 0.5;
+				o.lightPos = mul(UNITY_MATRIX_VP, half4(_LightPos.xy, 0, 1));
+				o.lightPos.z = _LightPos.z;
+				o.lightPos.xy = o.lightPos.xy*0.5 + 0.5;
+
+				#if UNITY_UV_STARTS_AT_TOP
+				o.normalTexcoord.y = 1 - o.normalTexcoord.y;
+				o.lightTexcoord.y = 1 - o.lightTexcoord.y;
+				o.lightPos.y = 1 - o.lightPos.y;
+				#endif
+
+				return o;
+			}
+
+			half4 frag (v2f i) : COLOR
+			{
+				half4 light = tex2D(_MainTex, i.lightTexcoord);
+				half3 normal = normalize(tex2D(_NormalsBuffer, i.normalTexcoord)*2.0 - 1.0);
+				half3 revLightDir = normalize(i.lightPos - half3(i.lightTexcoord, 0));
+				half lightness = max(0, -dot(normal, revLightDir));
+				return half4(light.rgb*lightness, light.a);
+			}
+		ENDCG
+	}
+}
+
+
+}