MyFactory.cpp

// Fill out your copyright notice in the Description page of Project Settings.

#include "MyFactory.h"


UMyFactory::UMyFactory()
{
	SupportedClass = UMaterial::StaticClass();

	bCreateNew = true;
	bEditorImport = false;
}

FText UMyFactory::GetDisplayName()const
{
	return FText::FromString("Sun Material");
}

UObject* UMyFactory::FactoryCreateNew
(
	UClass * InClass,
	UObject * InParent,
	FName InName,
	EObjectFlags Flags,
	UObject * Context,
	FFeedbackContext * Warn
)
{
	UE_LOG(LogTemp, Warning, TEXT("CIAONE PRP"));
	UE_LOG(LogTemp, Warning, TEXT("%s"), *InParent->GetPathName());

	UMaterial* Material = NewObject<UMaterial>(InParent,InName, Flags | RF_Transactional | RF_Public | RF_Standalone);
	//Material->MarkPackageDirty();

	Material->SetShadingModel(EMaterialShadingModel::MSM_Unlit);		//set material unlit

	/******************************************************************************************************/
	//GET ALL CLASSES
	UClass* TextureCoordinateClass = FindObject<UClass>(ANY_PACKAGE, TEXT("MaterialExpressionTextureCoordinate"));	
	if (!TextureCoordinateClass) 
		ESC;

	UClass* ParameterClass = FindObject<UClass>(ANY_PACKAGE, TEXT("MaterialExpressionScalarParameter"));
	if (!ParameterClass) 
		ESC;

	UClass* MultiplyClass = FindObject<UClass>(ANY_PACKAGE, TEXT("MaterialExpressionMultiply"));
	if (!MultiplyClass) 
		ESC;

	
	/******************************************************************************************************/

	//TEXTURE COORD
	UMaterialExpressionTextureCoordinate* TextureCoordinate = (UMaterialExpressionTextureCoordinate*)NewObject<UObject>(Material, TextureCoordinateClass);
	TextureCoordinate->UTiling = 1.0f;
	TextureCoordinate->VTiling = 1.0f;

	//TILING PARAMETER
	UMaterialExpressionScalarParameter* TilingParameter = (UMaterialExpressionScalarParameter*)NewObject<UObject>(Material, ParameterClass);
	TilingParameter->ParameterName = "Tiling";
	TilingParameter->DefaultValue = 3.0f;

	//MULTIPLY NODE
	UMaterialExpressionMultiply* MultiplyCoordsTiling = (UMaterialExpressionMultiply*)NewObject<UObject>(Material, MultiplyClass);
	
	FExpressionInput MultiplyCoordsTilingInputA;
	MultiplyCoordsTilingInputA.Expression = TextureCoordinate;				//multiply A

	FExpressionInput MultiplyCoordsTilingInputB;
	MultiplyCoordsTilingInputB.Expression = TilingParameter;				//multiply B

	MultiplyCoordsTiling->A = MultiplyCoordsTilingInputA;
	MultiplyCoordsTiling->B = MultiplyCoordsTilingInputB;

	FColorMaterialInput emissive;
	//emissive.Expression = MultiplyCoordsTiling;
	emissive.Constant = FColor::Red;
	Material->EmissiveColor = emissive;


	Material->PostEditChange();
	return Material;
}