HoudiniPublicAPI.cpp

/*
* Copyright (c) <2021> Side Effects Software Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
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* 2. The name of Side Effects Software may not be used to endorse or
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#include "HoudiniPublicAPI.h"

#include "HoudiniAsset.h"
#include "HoudiniEngineEditorUtils.h"
#include "HoudiniPublicAPIAssetWrapper.h"
#include "HoudiniPublicAPIInputTypes.h"
#include "HoudiniEngineCommands.h"
#include "HoudiniAssetComponent.h"

#include "Engine/World.h"

UHoudiniPublicAPI::UHoudiniPublicAPI()
{
}

bool
UHoudiniPublicAPI::IsSessionValid_Implementation() const
{
	return FHoudiniEngineCommands::IsSessionValid(); 
}

void
UHoudiniPublicAPI::CreateSession_Implementation()
{
	if (!IsSessionValid())
		FHoudiniEngineCommands::CreateSession();
}

void
UHoudiniPublicAPI::StopSession_Implementation()
{
	if (IsSessionValid())
		FHoudiniEngineCommands::StopSession();
}

void
UHoudiniPublicAPI::RestartSession_Implementation()
{
	if (IsSessionValid())
		FHoudiniEngineCommands::RestartSession();
	else
		FHoudiniEngineCommands::CreateSession();
}

UHoudiniPublicAPIAssetWrapper*
UHoudiniPublicAPI::InstantiateAsset_Implementation(
	UHoudiniAsset* InHoudiniAsset,
	const FTransform& InInstantiateAt,
	UObject* InWorldContextObject,
	ULevel* InSpawnInLevelOverride,
	const bool bInEnableAutoCook,
	const bool bInEnableAutoBake,
	const FString& InBakeDirectoryPath,
	const EHoudiniEngineBakeOption InBakeMethod,
	const EHoudiniStaticMeshMethod InStaticMeshMethod,
	const FMeshBuildSettings InMeshBuildSettings,
	const bool bInRemoveOutputAfterBake,
	const bool bInRecenterBakedActors,
	const bool bInReplacePreviousBake)
{
	if (!IsValid(InHoudiniAsset) || !(InHoudiniAsset->AssetImportData))
	{
		SetErrorMessage(TEXT("InHoudiniAsset is invalid or does not have AssetImportData."));
		return nullptr;
	}

	// Create wrapper for asset instance
	UHoudiniPublicAPIAssetWrapper* Wrapper = UHoudiniPublicAPIAssetWrapper::CreateEmptyWrapper(this);

	if (Wrapper)
	{
		// Enable/disable error logging based on the API setting
		Wrapper->SetLoggingErrorsEnabled(IsLoggingErrors());

		if (!InstantiateAssetWithExistingWrapper(
				Wrapper,
				InHoudiniAsset,
				InInstantiateAt,
				InWorldContextObject,
				InSpawnInLevelOverride,
				bInEnableAutoCook,
				bInEnableAutoBake,
				InBakeDirectoryPath,
				InBakeMethod,
				InStaticMeshMethod,
				InMeshBuildSettings,
				bInRemoveOutputAfterBake,
				bInRecenterBakedActors,
				bInReplacePreviousBake))
		{
			// failed to instantiate asset, return null
			return nullptr;
		}
	}

	return Wrapper;
}

bool
UHoudiniPublicAPI::InstantiateAssetWithExistingWrapper_Implementation(
	UHoudiniPublicAPIAssetWrapper* InWrapper,
	UHoudiniAsset* InHoudiniAsset,
	const FTransform& InInstantiateAt,
	UObject* InWorldContextObject,
	ULevel* InSpawnInLevelOverride,
	const bool bInEnableAutoCook,
	const bool bInEnableAutoBake,
	const FString& InBakeDirectoryPath,
	const EHoudiniEngineBakeOption InBakeMethod,
	const EHoudiniStaticMeshMethod InStaticMeshMethod,
	const FMeshBuildSettings InMeshBuildSettings,
	const bool bInRemoveOutputAfterBake,
	const bool bInRecenterBakedActors,
	const bool bInReplacePreviousBake)
{
	if (!IsValid(InWrapper))
	{
		SetErrorMessage(TEXT("InWrapper is not valid."));
		return false;
	}

	if (!IsValid(InHoudiniAsset) || !(InHoudiniAsset->AssetImportData))
	{
		SetErrorMessage(TEXT("InHoudiniAsset is invalid or does not have AssetImportData."));
		return false;
	}

	UWorld* OverrideWorldToSpawnIn = IsValid(InWorldContextObject) ? InWorldContextObject->GetWorld() : nullptr;
	AActor* HoudiniAssetActor = FHoudiniEngineEditorUtils::InstantiateHoudiniAssetAt(InHoudiniAsset, InInstantiateAt, OverrideWorldToSpawnIn, InSpawnInLevelOverride);
	if (!IsValid(HoudiniAssetActor))
	{
		// Determine the path of what would have been the owning level/world of the actor for error logging purposes
		const FString LevelPath = IsValid(InSpawnInLevelOverride) ? InSpawnInLevelOverride->GetPathName() : FString();
		const FString WorldPath = IsValid(OverrideWorldToSpawnIn) ? OverrideWorldToSpawnIn->GetPathName() : FString();
		const FString OwnerPath = LevelPath.IsEmpty() ? WorldPath : LevelPath;
		SetErrorMessage(FString::Printf(TEXT("Failed to spawn a AHoudiniAssetActor in %s."), *OwnerPath));
		return false;
	}

	// Wrap the instantiated asset
	if (!InWrapper->WrapHoudiniAssetObject(HoudiniAssetActor))
	{
		FString WrapperError;
		InWrapper->GetLastErrorMessage(WrapperError);
		SetErrorMessage(FString::Printf(
			TEXT("Failed to wrap '%s': %s."), *(HoudiniAssetActor->GetActorNameOrLabel()), *WrapperError));
		return false;
	}

	InWrapper->SetAutoCookingEnabled(bInEnableAutoCook);

	FDirectoryPath BakeDirectoryPath;
	BakeDirectoryPath.Path = InBakeDirectoryPath;
	InWrapper->SetBakeFolder(BakeDirectoryPath);
	InWrapper->SetBakeMethod(InBakeMethod);
	InWrapper->SetStaticMeshMethod(InStaticMeshMethod);
	InWrapper->SetMeshBuildSettings(InMeshBuildSettings);
	InWrapper->SetRemoveOutputAfterBake(bInRemoveOutputAfterBake);
	InWrapper->SetRecenterBakedActors(bInRecenterBakedActors);
	InWrapper->SetReplacePreviousBake(bInReplacePreviousBake);
	InWrapper->SetAutoBakeEnabled(bInEnableAutoBake);
	
	return true;
}

bool
UHoudiniPublicAPI::IsAssetCookingPaused_Implementation() const 
{ 
	return FHoudiniEngineCommands::IsAssetCookingPaused(); 
}

void
UHoudiniPublicAPI::PauseAssetCooking_Implementation()
{
	if (!IsAssetCookingPaused())
		FHoudiniEngineCommands::PauseAssetCooking();
}

void
UHoudiniPublicAPI::ResumeAssetCooking_Implementation()
{
	if (IsAssetCookingPaused())
		FHoudiniEngineCommands::PauseAssetCooking();
}

UHoudiniPublicAPIInput*
UHoudiniPublicAPI::CreateEmptyInput_Implementation(TSubclassOf<UHoudiniPublicAPIInput> InInputClass, UObject* InOuter)
{
	UObject* Outer = InOuter;
	if (!IsValid(Outer))
		Outer = this;
	UHoudiniPublicAPIInput* const NewInput = NewObject<UHoudiniPublicAPIInput>(Outer, InInputClass.Get());
	if (!IsValid(NewInput))
	{
		SetErrorMessage(TEXT("Could not create a new valid UHoudiniPublicAPIInput instance."));
	}
	else if (Outer)
	{
		// Enable/disable error logging based on the outer's setting (if it is a sub-class of UHoudiniPublicAPIObjectBase)
		const bool bShouldLogErrors = Outer->IsA<UHoudiniPublicAPIObjectBase>() ?
			Cast<UHoudiniPublicAPIObjectBase>(Outer)->IsLoggingErrors() : IsLoggingErrors();
		NewInput->SetLoggingErrorsEnabled(bShouldLogErrors);
	}

	return NewInput;
}

EHoudiniPublicAPIRampInterpolationType
UHoudiniPublicAPI::ToHoudiniPublicAPIRampInterpolationType(const EHoudiniRampInterpolationType InInterpolationType)
{
	switch (InInterpolationType)
	{
		case EHoudiniRampInterpolationType::InValid:
			return EHoudiniPublicAPIRampInterpolationType::InValid;
		case EHoudiniRampInterpolationType::BEZIER:
			return EHoudiniPublicAPIRampInterpolationType::BEZIER;
		case EHoudiniRampInterpolationType::LINEAR:
			return EHoudiniPublicAPIRampInterpolationType::LINEAR;
		case EHoudiniRampInterpolationType::BSPLINE:
			return EHoudiniPublicAPIRampInterpolationType::BSPLINE;
		case EHoudiniRampInterpolationType::HERMITE:
			return EHoudiniPublicAPIRampInterpolationType::HERMITE;
		case EHoudiniRampInterpolationType::CONSTANT:
			return EHoudiniPublicAPIRampInterpolationType::CONSTANT;
		case EHoudiniRampInterpolationType::CATMULL_ROM:
			return EHoudiniPublicAPIRampInterpolationType::CATMULL_ROM;
		case EHoudiniRampInterpolationType::MONOTONE_CUBIC:
			return EHoudiniPublicAPIRampInterpolationType::MONOTONE_CUBIC;
	}

	return EHoudiniPublicAPIRampInterpolationType::InValid;
}

EHoudiniRampInterpolationType
UHoudiniPublicAPI::ToHoudiniRampInterpolationType(const EHoudiniPublicAPIRampInterpolationType InInterpolationType)
{
	switch (InInterpolationType)
	{
		case EHoudiniPublicAPIRampInterpolationType::InValid:
			return EHoudiniRampInterpolationType::InValid;
		case EHoudiniPublicAPIRampInterpolationType::BEZIER:
			return EHoudiniRampInterpolationType::BEZIER;
		case EHoudiniPublicAPIRampInterpolationType::LINEAR:
			return EHoudiniRampInterpolationType::LINEAR;
		case EHoudiniPublicAPIRampInterpolationType::BSPLINE:
			return EHoudiniRampInterpolationType::BSPLINE;
		case EHoudiniPublicAPIRampInterpolationType::HERMITE:
			return EHoudiniRampInterpolationType::HERMITE;
		case EHoudiniPublicAPIRampInterpolationType::CONSTANT:
			return EHoudiniRampInterpolationType::CONSTANT;
		case EHoudiniPublicAPIRampInterpolationType::CATMULL_ROM:
			return EHoudiniRampInterpolationType::CATMULL_ROM;
		case EHoudiniPublicAPIRampInterpolationType::MONOTONE_CUBIC:
			return EHoudiniRampInterpolationType::MONOTONE_CUBIC;
	}

	return EHoudiniRampInterpolationType::InValid;
}