Engine/Plugins/Experimental/DataInterfaceGraph/Source/DataInterfaceGraphUncookedOnly/Private/DataInterfaceGraph_EdGraph.cpp

// Copyright Epic Games, Inc. All Rights Reserved.

#include "DataInterfaceGraph_EdGraph.h"
#include "DataInterfaceGraph_EditorData.h"
#include "DataInterfaceUncookedOnlyUtils.h"

void UDataInterfaceGraph_EdGraph::Initialize(UDataInterfaceGraph_EditorData* InEditorData)
{
	InEditorData->ModifiedEvent.RemoveAll(this);
	InEditorData->ModifiedEvent.AddUObject(this, &UDataInterfaceGraph_EdGraph::HandleModifiedEvent);
	InEditorData->VMCompiledEvent.RemoveAll(this);
	InEditorData->VMCompiledEvent.AddUObject(this, &UDataInterfaceGraph_EdGraph::HandleVMCompiledEvent);
}

URigVMGraph* UDataInterfaceGraph_EdGraph::GetModel() const
{
	if (const UDataInterfaceGraph_EditorData* EditorData = GetTypedOuter<UDataInterfaceGraph_EditorData>())
	{
		return EditorData->GetRigVMGraph(this);
	}
	return nullptr;
}

URigVMController* UDataInterfaceGraph_EdGraph::GetController() const
{
	if (const UDataInterfaceGraph_EditorData* EditorData = GetTypedOuter<UDataInterfaceGraph_EditorData>())
	{
		return EditorData->GetRigVMController(this);
	}
	return nullptr;
}
-												Initial prototype of data interfaces and data interface graphs

Data interfaces are designed to be the basis for a functional, compositional framework, allowing loose bindings (a typed return value) between functional units (data interfaces). They incorporate the following main features:
- Simple call to 'get a value' from a data interface.
- Most communication is done via the UE::DataInterface::FContext, which handles data management.
- Type-erased values (UE::DataInterface::FParam) for results, parameters and state. These can be promoted to typed values (UE::DataInterface::TParam<T>) with runtime validation.
- 'Hidden state', allocated on-demand via a context, to support functional units that require statefulness. State is allocated according to the calling context, currently a hash of the 'callstack' and call site, so subsequent calls to the same data interface can reuse state.
- Batch processing of multiple state representations at once (e.g. processing multiple characters at one), via a chunked allocation strategy.

Also includes data interface graphs - a proof-of-concept implementation using RigVM to construct scripted data interface logic. This is still very early!

Still lots to do:
- Removal of typed interfaces (e.g. IDataInterface_Float)
- Validation of hidden state approach on a wider scale
- Validation of kernel processing approach
- Chunked branching (probably via a masking strategy) so branches can be handled within chunks
- Reworked type system incorporating type promotion/conversion
- UI work to allow for mixing instanced sub-objects and asset references with using TScriptInterface<IDataInterface>
- Expansion or RigVM usage and a ton of UI/UX work to get graph editing up to scratch
- Many many more things

#preflight 625e86873e0f6f80ada98290

[CL 19806109 by Thomas Sarkanen in ue5-main branch]

											
										
										
											2022-04-19 06:28:48 -04:00
+								// Copyright Epic Games, Inc. All Rights Reserved.
 								#include "DataInterfaceGraph_EdGraph.h"
 								#include "DataInterfaceGraph_EditorData.h"
 								#include "DataInterfaceUncookedOnlyUtils.h"
 								void UDataInterfaceGraph_EdGraph::Initialize(UDataInterfaceGraph_EditorData* InEditorData)
 								{
 									InEditorData->ModifiedEvent.RemoveAll(this);
 									InEditorData->ModifiedEvent.AddUObject(this, &UDataInterfaceGraph_EdGraph::HandleModifiedEvent);
 									InEditorData->VMCompiledEvent.RemoveAll(this);
 									InEditorData->VMCompiledEvent.AddUObject(this, &UDataInterfaceGraph_EdGraph::HandleVMCompiledEvent);
 								}
 								URigVMGraph* UDataInterfaceGraph_EdGraph::GetModel() const
 								{
 									if (const UDataInterfaceGraph_EditorData* EditorData = GetTypedOuter<UDataInterfaceGraph_EditorData>())
 									{
 										return EditorData->GetRigVMGraph(this);
 									}
 									return nullptr;
 								}
 								URigVMController* UDataInterfaceGraph_EdGraph::GetController() const
 								{
 									if (const UDataInterfaceGraph_EditorData* EditorData = GetTypedOuter<UDataInterfaceGraph_EditorData>())
 									{
 										return EditorData->GetRigVMController(this);
 									}
 									return nullptr;
 								}