1 files changed, 57 insertions, 0 deletions
diff --git a/Assets/AmplifyShaderEditor/Plugins/EditorResources/Previews/Preview_ViewDirInputsCoordNode.shader b/Assets/AmplifyShaderEditor/Plugins/EditorResources/Previews/Preview_ViewDirInputsCoordNode.shader
new file mode 100644
index 00000000..7bf6d619
--- /dev/null
+++ b/Assets/AmplifyShaderEditor/Plugins/EditorResources/Previews/Preview_ViewDirInputsCoordNode.shader
@@ -0,0 +1,57 @@
+Shader "Hidden/WorldPosInputsNode"
+{
+	SubShader
+	{
+		Pass //world space
+		{
+			CGPROGRAM
+			#include "UnityCG.cginc"
+			#pragma vertex vert_img
+			#pragma fragment frag
+
+			float4 frag(v2f_img i) : SV_Target
+			{
+				float2 xy = 2 * i.uv - 1;
+				float z = -sqrt(1-saturate(dot(xy,xy)));
+				float3 vertexPos = float3(xy, z);
+				float3 worldViewDir = normalize(float3(0,0,-5) - vertexPos);
+
+				return float4(worldViewDir, 1);
+			}
+			ENDCG
+		}
+
+		Pass //tangent space
+		{
+			CGPROGRAM
+			#include "UnityCG.cginc"
+			#pragma vertex vert_img
+			#pragma fragment frag
+
+			float4 frag(v2f_img i) : SV_Target
+			{
+				float2 xy = 2 * i.uv - 1;
+				float z = -sqrt(1-saturate(dot(xy,xy)));
+				float3 vertexPos = float3(xy, z);
+				float3 worldViewDir = normalize(float3(0,0,-5) - vertexPos);
+
+				float3 normal = normalize(vertexPos);
+				float3 worldNormal = UnityObjectToWorldNormal(normal);
+
+				float3 tangent = normalize(float3( -z, xy.y*0.01, xy.x ));
+				float3 worldPos = mul(unity_ObjectToWorld, float4(vertexPos,1)).xyz;
+				float3 worldTangent = UnityObjectToWorldDir(tangent);
+				float tangentSign = -1;
+				float3 worldBinormal = normalize( cross(worldNormal, worldTangent) * tangentSign);
+				float4 tSpace0 = float4(worldTangent.x, worldBinormal.x, worldNormal.x, worldPos.x);
+				float4 tSpace1 = float4(worldTangent.y, worldBinormal.y, worldNormal.y, worldPos.y);
+				float4 tSpace2 = float4(worldTangent.z, worldBinormal.z, worldNormal.z, worldPos.z);
+
+				fixed3 viewDirTan = tSpace0.xyz * worldViewDir.x + tSpace1.xyz * worldViewDir.y + tSpace2.xyz * worldViewDir.z;
+
+				return float4(viewDirTan, 1);
+			}
+			ENDCG
+		}
+	}
+}