Hello,
I am trying to follow this guide: Visualize Mesh Features and Metadata – Cesium
on how to display metadata based on some features of the 3D tile.
As a starting project I took a Cesium ForUnrealSamples with the newest Cesium for Unreal plugin 2.9.0.
Every thing is going well until connecting the generated material with custom logic to a base color of SetMaterialAttributes.
Then I got a two separate errors
First error:
LogShaderCompilers: Warning: Failed to compile Material /CesiumForUnreal/Materials/M_CesiumBaseMaterial.M_CesiumBaseMaterial (MI:/Game/MI_CesiumThreeOverlaysAndClippingNewYork.MI_CesiumThreeOverlaysAndClippingNewYork) for platform PCD3D_SM5, Default Material will be used in game.
/Engine/Generated/Material.ush:3969:23: error: no matching function for call to ‘LWCSubtract’
FLWCScalar Local14 = LWCSubtract(Local11, 30.00000000);
^~~~~~~~~~~
/Engine/Private/LWCOperations.ush:57:12: note: candidate function not viable: no known conversion from ‘literal float’ to ‘FLWCScalar’ for 2nd argument
FLWCScalar LWCSubtract(float Lhs, FLWCScalar Rhs) { return MakeLWCScalar(- (( Rhs ).Tile), Lhs - Rhs.Offset); }
^
/Engine/Private/LWCOperations.ush:58:12: note: candidate function not viable: no known conversion from ‘float’ to ‘FLWCScalar’ for 1st argument
FLWCScalar LWCSubtract(FLWCScalar Lhs, float Rhs) { return MakeLWCScalar( (( Lhs ).Tile), Lhs.Offset - Rhs); }
^
/Engine/Private/LWCOperations.ush:57:13: note: candidate function not viable: no known conversion from ‘literal float’ to ‘FLWCVector2’ for 2nd argument
FLWCVector2 LWCSubtract(float2 Lhs, FLWCVector2 Rhs) { return MakeLWCVector2(- (( Rhs ).Tile), Lhs - Rhs.Offset); }
^
/Engine/Private/LWCOperations.ush:58:13: note: candidate function not viable: no known conversion from ‘float’ to ‘FLWCVector2’ for 1st argument
FLWCVector2 LWCSubtract(FLWCVector2 Lhs, float2 Rhs) { return MakeLWCVector2( (( Lhs ).Tile), Lhs.Offset - Rhs); }
^
/Engine/Private/LWCOperations.ush:57:13: note: candidate function not viable: no known conversion from ‘literal float’ to ‘FLWCVector3’ for 2nd argument
FLWCVector3 LWCSubtract(float3 Lhs, FLWCVector3 Rhs) { return MakeLWCVector3(- (( Rhs ).Tile), Lhs - Rhs.Offset); }
^
/Engine/Private/LWCOperations.ush:58:13: note: candidate function not viable: no known conversion from ‘float’ to ‘FLWCVector3’ for 1st argument
FLWCVector3 LWCSubtract(FLWCVector3 Lhs, float3 Rhs) { return MakeLWCVector3( (( Lhs ).Tile), Lhs.Offset - Rhs); }
^
/Engine/Private/LWCOperations.ush:57:13: note: candidate function not viable: no known conversion from ‘literal float’ to ‘FLWCVector4’ for 2nd argument
FLWCVector4 LWCSubtract(float4 Lhs, FLWCVector4 Rhs) { return MakeLWCVector4(- (( Rhs ).Tile), Lhs - Rhs.Offset); }
^
/Engine/Private/LWCOperations.ush:58:13: note: candidate function not viable: no known conversion from ‘float’ to ‘FLWCVector4’ for 1st argument
FLWCVector4 LWCSubtract(FLWCVector4 Lhs, float4 Rhs) { return MakeLWCVector4( (( Lhs ).Tile), Lhs.Offset - Rhs); }
^
/Engine/Private/LWCOperations.ush:56:12: note: candidate function not viable: no known conversion from ‘float’ to ‘FLWCScalar’ for 1st argument
FLWCScalar LWCSubtract(FLWCScalar Lhs, FLWCScalar Rhs) { return MakeLWCScalar( (( Lhs ).Tile) - (( Rhs ).Tile), Lhs.Offset - Rhs.Offset); }
^
/Engine/Private/LWCOperations.ush:56:13: note: candidate function not viable: no known conversion from ‘float’ to ‘FLWCVector2’ for 1st argument
FLWCVector2 LWCSubtract(FLWCVector2 Lhs, FLWCVector2 Rhs) { return MakeLWCVector2( (( Lhs ).Tile) - (( Rhs ).Tile), Lhs.Offset - Rhs.Offset); }
^
/Engine/Private/LWCOperations.ush:56:13: note: candidate function not viable: no known conversion from ‘float’ to ‘FLWCVector3’ for 1st argument
FLWCVector3 LWCSubtract(FLWCVector3 Lhs, FLWCVector3 Rhs) { return MakeLWCVector3( (( Lhs ).Tile) - (( Rhs ).Tile), Lhs.Offset - Rhs.Offset); }
^
/Engine/Private/LWCOperations.ush:56:13: note: candidate function not viable: no known conversion from ‘float’ to ‘FLWCVector4’ for 1st argument
FLWCVector4 LWCSubtract(FLWCVector4 Lhs, FLWCVector4 Rhs) { return MakeLWCVector4( (( Lhs ).Tile) - (( Rhs ).Tile), Lhs.Offset - Rhs.Offset); }
^
/Engine/Generated/Material.ush:3972:23: error: no matching function for call to ‘LWCSubtract’
FLWCScalar Local17 = LWCSubtract(Local12, 1700.00000000);
Second error:
LogOutputDevice: Error: === Handled ensure: ===
*LogOutputDevice: Error: Ensure condition failed: false [File:D:\build++UE5\Sync\Engine\Source\Runtime\Engine\Private\Materials\HLSLMaterialTranslator.cpp] [Line: 8558] *
LogOutputDevice: Error: FHLSLMaterialTranslator::IsExpressionConstantValue - Unknown constant expression type
*LogOutputDevice: Error: Stack: *
LogOutputDevice: Error: [Callstack] 0x00007ff91a226282 UnrealEditor-Engine.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ff91a1e056d UnrealEditor-Engine.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00007ff91a1d1435 UnrealEditor-Engine.dll!UnknownFunction []
Custom logic in generated material from CesiumFeaturesMetadata component:
Is the problem in my implementation or in the CesiumBaseMaterial?
Thank you very much for any suggestions and solutions. 
