Change ComputeScreenPos to use projection sign as an argument

MaterialGraphProject/Assets/UnityShaderEditor/Editor/Data/Util/ShaderGenerator.cs

             if (combinedRequierments.requiresScreenPosition)
             {
                 interpolators.AddShaderChunk(string.Format("float4 {0} : TEXCOORD{1};", ShaderGeneratorNames.ScreenPosition, interpolatorIndex), false);
-                vertexShader.AddShaderChunk(string.Format("o.{0} = ComputeScreenPos(mul(GetWorldToHClipMatrix(), mul(GetObjectToWorldMatrix(), v.vertex)));", ShaderGeneratorNames.ScreenPosition), false);
+                vertexShader.AddShaderChunk(string.Format("o.{0} = ComputeScreenPos(mul(GetWorldToHClipMatrix(), mul(GetObjectToWorldMatrix(), v.vertex)), _ProjectionParams.x);", ShaderGeneratorNames.ScreenPosition), false);
                 pixelShader.AddShaderChunk(string.Format("float4 {0} = IN.{0};", ShaderGeneratorNames.ScreenPosition), false);
                 interpolatorIndex++;
             }

MaterialGraphProject/Assets/UnityShaderEditor/ShaderGraphLibrary/Functions.hlsl

     #endif
 }
 
-float4 ComputeScreenPos (float4 pos) 
+float4 ComputeScreenPos (float4 pos, float projectionSign) 
-  o.xy = float2(o.x, o.y*_ProjectionParams.x) + o.w;
+  o.xy = float2(o.x, o.y * projectionSign) + o.w;
   o.zw = pos.zw;
   return o;
 }