DatasmithMaterialsUtils.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreMinimal.h"
#include "DatasmithDefinitions.h"
#include "Math/Color.h"
#include "Math/UnrealMathSSE.h"
#include "Math/Vector.h"
#include "Math/Vector2D.h"
#include "Misc/Optional.h"
#include "Templates/SharedPointer.h"
 
class IDatasmithMaterialExpression;
class IDatasmithMaterialExpressionTexture;
class IDatasmithUEPbrMaterialElement;
 
namespace DatasmithMaterialsUtils
{
    struct FUVEditParameters
    {
        FUVEditParameters()
            : UVOffset( FVector2D::ZeroVector )
            , UVTiling( FVector2D::UnitVector )
            , RotationPivot( 0.f, 1.f, 0.f )
            , RotationAngle( 0.f )
            , ChannelIndex( 0 )
            , bIsUsingRealWorldScale( false )
            , bMirrorU( false )
            , bMirrorV( false )
        {
        }
 
        // UV space has its origin at top-left, with U going left-to-right, V top-to-bottom
        FVector2D UVOffset;
        FVector2D UVTiling;
 
        // W rotation center
        FVector RotationPivot;
 
        // W rotation in degrees (rotation is counterclockwise)
        float RotationAngle;
 
        // UV channel to use
        uint8 ChannelIndex;
 
        // Enable "Real-World Scale" behavior as in 3ds max
        bool bIsUsingRealWorldScale;
 
        // Enable mirroring of texture in U and V
        bool bMirrorU;
        bool bMirrorV;
    };
 
    DATASMITHCORE_API IDatasmithMaterialExpressionTexture* CreateTextureExpression( const TSharedRef< IDatasmithUEPbrMaterialElement >& MaterialElement, const TCHAR* ParameterName, const TCHAR* TextureMapPath, const FUVEditParameters& UVParameters );
 
    DATASMITHCORE_API IDatasmithMaterialExpression* CreateWeightedMaterialExpression( const TSharedRef< IDatasmithUEPbrMaterialElement >& MaterialElement, const TCHAR* ParameterName, TOptional< FLinearColor > Color, TOptional< float > Scalar, IDatasmithMaterialExpression* Expression, float Weight, EDatasmithTextureMode TextureMode = EDatasmithTextureMode::Diffuse );
 
    DATASMITHCORE_API FLinearColor TemperatureToColor(float Kelvin);
}