UDIMUtilities.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "Containers/Map.h"
#include "CoreMinimal.h"
#include "HAL/Platform.h"
 
class FString;
 
namespace UE
{
    namespace TextureUtilitiesCommon
    {
        // UDIM = 1001 + X + Y*10
        //  note the tens digit is not Y ; eg. 1010 is X=9,Y=0
 
        constexpr int32 UDIM_Max_X = 9;
        constexpr int32 UDIM_Max_Y = 90;
        constexpr int32 UDIM_Min_Index = 1001;
        constexpr int32 UDIM_Max_Index = UDIM_Min_Index + UDIM_Max_X + UDIM_Max_Y * 10;
 
        // this Regex is unnecessarily complex and broad
        //  UDIM must start with "10" then two digits, or "1100"
        constexpr const TCHAR* DefaultUdimRegexPattern = TEXT(R"((.+?)[._](\d{4})$)");
 
        TEXTUREUTILITIESCOMMON_API uint32 ParseUDIMName(const FString& Name, const FString& UdimRegexPattern, FString& OutPrefixName, FString& OutPostfixName);
 
        TEXTUREUTILITIESCOMMON_API int32 GetUDIMIndex(int32 BlockX, int32 BlockY);
 
        TEXTUREUTILITIESCOMMON_API TMap<int32, FString> GetUDIMBlocksFromSourceFile(const FString& File, const FString& UdimRegexPattern, FString* OutFilenameWithoutUdimPatternAndExtension = nullptr);
 
        TEXTUREUTILITIESCOMMON_API void ExtractUDIMCoordinates(int32 UDIMIndex, int32& OutBlockX, int32& OutBlockY);
    }
}