Added a scene graph
This commit is contained in:
Diren D Bharwani
parent
759e414657
commit
d4944ef920
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@ -183,6 +183,7 @@
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<ClInclude Include="src\Resource\Handle.h" />
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<ClInclude Include="src\Resource\ResourceLibrary.h" />
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<ClInclude Include="src\Resource\SparseSet.h" />
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<ClInclude Include="src\Scene\SHSceneGraph.h" />
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<ClInclude Include="src\SHpch.h" />
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<ClInclude Include="src\Scene\SHScene.h" />
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<ClInclude Include="src\Scene\SHSceneManager.h" />
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@ -253,6 +254,7 @@
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<ClCompile Include="src\Math\Vector\SHVec2.cpp" />
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<ClCompile Include="src\Math\Vector\SHVec3.cpp" />
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<ClCompile Include="src\Math\Vector\SHVec4.cpp" />
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<ClCompile Include="src\Scene\SHSceneGraph.cpp" />
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<ClCompile Include="src\SHpch.cpp">
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<PrecompiledHeader>Create</PrecompiledHeader>
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</ClCompile>
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@ -353,6 +353,7 @@
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<ClInclude Include="src\Math\Vector\SHVec2.h" />
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<ClInclude Include="src\Math\Vector\SHVec3.h" />
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<ClInclude Include="src\Math\Vector\SHVec4.h" />
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<ClInclude Include="src\Scene\SHSceneGraph.h" />
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</ItemGroup>
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<ItemGroup>
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<ClCompile Include="src\Engine\ECS_Base\Components\SHComponent.cpp">
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@ -536,5 +537,6 @@
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<ClCompile Include="src\Math\Vector\SHVec2.cpp" />
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<ClCompile Include="src\Math\Vector\SHVec3.cpp" />
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<ClCompile Include="src\Math\Vector\SHVec4.cpp" />
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<ClCompile Include="src\Scene\SHSceneGraph.cpp" />
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</ItemGroup>
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</Project>
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@ -34,7 +34,7 @@ namespace SHADE
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//The Container of all Componentgroups
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static std::vector<SHComponentGroup> componentGroups;
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friend class SHSceneNode;
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friend struct SHSceneNode;
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@ -22,6 +22,7 @@
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#include <string>
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#include <algorithm>
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#include <array>
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#include <ranges>
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#include <utility>
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#include <unordered_map>
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#include <map>
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@ -0,0 +1,475 @@
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/****************************************************************************************
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* \file SHSceneGraph.cpp
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* \author Diren D Bharwani, diren.dbharwani, 390002520
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* \brief Implementation for a Scene Graph & Scene Nodes.
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*
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* \copyright Copyright (C) 2022 DigiPen Institute of Technology. Reproduction or
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* disclosure of this file or its contents without the prior written consent
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* of DigiPen Institute of Technology is prohibited.
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****************************************************************************************/
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#include <SHpch.h>
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// Primary Header
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#include "SHSceneGraph.h"
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// Project Headers
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#include "Engine/ECS_Base/System/SHEntityManager.h"
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#include "Tools/SHLogger.h"
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#include "Tools/SHException.h"
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namespace SHADE
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{
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/*-----------------------------------------------------------------------------------*/
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/* Constructors & Destructor Definitions */
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/*-----------------------------------------------------------------------------------*/
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SHSceneNode::SHSceneNode(EntityID eid, SHSceneNode* parent) noexcept
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: isActive { true }
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, entityID { eid }
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, parent { parent }
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{}
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SHSceneNode::SHSceneNode(const SHSceneNode& rhs) noexcept
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: isActive { rhs.isActive }
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, entityID { rhs.entityID }
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, parent { rhs.parent }
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{
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std::ranges::copy(rhs.children.begin(), rhs.children.end(), std::back_inserter(children));
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}
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SHSceneNode::SHSceneNode(SHSceneNode&& rhs) noexcept
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: isActive { rhs.isActive }
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, entityID { rhs.entityID }
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, parent { rhs.parent }
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{
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std::ranges::copy(rhs.children.begin(), rhs.children.end(), std::back_inserter(children));
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}
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SHSceneNode& SHSceneNode::operator=(const SHSceneNode& rhs) noexcept
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{
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if (this == &rhs)
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return *this;
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isActive = rhs.isActive;
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entityID = rhs.entityID;
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parent = rhs.parent;
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children.clear();
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std::ranges::copy(rhs.children.begin(), rhs.children.end(), std::back_inserter(children));
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return *this;
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}
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SHSceneNode& SHSceneNode::operator=(SHSceneNode&& rhs) noexcept
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{
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isActive = rhs.isActive;
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entityID = rhs.entityID;
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parent = rhs.parent;
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children.clear();
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std::ranges::copy(rhs.children.begin(), rhs.children.end(), std::back_inserter(children));
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return *this;
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}
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SHSceneGraph::SHSceneGraph() noexcept
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: root { nullptr }
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{}
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SHSceneGraph::~SHSceneGraph() noexcept
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{
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SHASSERT(root != nullptr, "Unable to destroy a Scene without a root node!")
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#ifdef _DEBUG
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SHLOG_INFO("Destroying Scene Graph...")
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#endif
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// Go through the map and release all the nodes
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for (auto* node : entityNodeMap | std::views::values)
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ReleaseNode(node);
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#ifdef _DEBUG
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SHLOG_INFO("Scene Graph Destroyed Successfully!")
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#endif
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}
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/*-----------------------------------------------------------------------------------*/
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/* Getter Function Definitions */
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/*-----------------------------------------------------------------------------------*/
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SHSceneNode* SHSceneNode::GetChild(EntityID childID) const noexcept
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{
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// Error handling
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{
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if (!SHEntityManager::IsValidEID(childID))
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{
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SHLOG_ERROR("Child Entity {} is invalid! Unable to get child from Entity {}", childID, entityID)
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return nullptr;
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}
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if (children.empty())
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{
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SHLOG_WARNING("Entity {} has no children!", entityID)
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return nullptr;
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}
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}
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// Find child
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const auto ENTITY_MATCH = [&](const SHSceneNode* node) { return node->GetEntityID() == childID; };
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const auto CHILD_ITER = std::ranges::find_if(children.begin(), children.end(),ENTITY_MATCH);
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if (CHILD_ITER == children.end())
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{
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SHLOG_WARNING("Entity {} is not a child of Entity {}! Unable to retrieve child node!", childID, entityID)
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return nullptr;
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}
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return *CHILD_ITER;
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}
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SHSceneNode* SHSceneGraph::GetRoot() const noexcept
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{
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if (root != nullptr)
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return root;
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SHLOG_WARNING("Scene has no root object!")
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return nullptr;
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}
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SHSceneNode* SHSceneGraph::GetNode(EntityID entityID) const noexcept
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{
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if (!SHEntityManager::IsValidEID(entityID))
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{
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SHLOG_ERROR("Entity {} is invalid! Unable to Get Scene node!", entityID)
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return nullptr;
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}
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const auto NODE_ITER = entityNodeMap.find(entityID);
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if (NODE_ITER == entityNodeMap.end())
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{
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SHLOG_WARNING("Entity {} cannot be found in the scene! Unable to Get Scene node!", entityID)
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return nullptr;
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}
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return NODE_ITER->second;
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}
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SHSceneNode* SHSceneGraph::GetParent(EntityID entityID) const noexcept
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{
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if (!SHEntityManager::IsValidEID(entityID))
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{
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SHLOG_ERROR("Entity {} is invalid! Unable to get Parent node!", entityID)
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return nullptr;
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}
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const auto NODE_ITER = entityNodeMap.find(entityID);
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if (NODE_ITER == entityNodeMap.end())
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{
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SHLOG_WARNING("Entity {} cannot be found in the scene! Unable to get Parent node!", entityID)
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return nullptr;
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}
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return NODE_ITER->second->GetParent();
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}
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SHSceneNode* SHSceneGraph::GetChild(EntityID entityID, SHSceneNode* childNode) const noexcept
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{
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// Error Handling
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if (!SHEntityManager::IsValidEID(entityID))
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{
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SHLOG_ERROR("Entity {} is invalid!", entityID)
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return nullptr;
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}
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const auto NODE_ITER = entityNodeMap.find(entityID);
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if (NODE_ITER == entityNodeMap.end())
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{
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SHLOG_WARNING("Entity {} cannot be found in the scene!", entityID)
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return nullptr;
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}
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const auto& children = NODE_ITER->second->GetChildren();
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if (children.empty())
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{
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SHLOG_WARNING("Entity {} has no children!", entityID)
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return nullptr;
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}
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const auto CHILD_ITER = std::ranges::find(children.begin(), children.end(), childNode);
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if (CHILD_ITER == children.end())
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{
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SHLOG_WARNING("Entity {} is not a child of Entity {}!", childNode->GetEntityID(), entityID)
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return nullptr;
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}
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return *CHILD_ITER;
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}
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SHSceneNode* SHSceneGraph::GetChild(EntityID entityID, EntityID childEntityID) const noexcept
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{
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if (!SHEntityManager::IsValidEID(entityID))
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{
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SHLOG_ERROR("Entity {} is invalid!", entityID)
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return nullptr;
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}
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const auto NODE_ITER = entityNodeMap.find(entityID);
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if (NODE_ITER == entityNodeMap.end())
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{
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SHLOG_WARNING("Entity {} cannot be found in the scene!", entityID)
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return nullptr;
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}
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return NODE_ITER->second->GetChild(childEntityID);
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}
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const std::vector<SHSceneNode*>& SHSceneGraph::GetChildren(EntityID entityID) const noexcept
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{
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// TODO(Diren): Discuss with team best way to handle this
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if (!SHEntityManager::IsValidEID(entityID))
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{
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SHLOG_ERROR("Entity {} is invalid!", entityID)
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return root->GetChildren();
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}
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const auto NODE_ITER = entityNodeMap.find(entityID);
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if (NODE_ITER == entityNodeMap.end())
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{
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SHLOG_WARNING("Entity {} cannot be found in the scene!", entityID)
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return root->GetChildren();
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}
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return NODE_ITER->second->GetChildren();
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}
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/*-----------------------------------------------------------------------------------*/
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/* Setter Function Definitions */
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/*-----------------------------------------------------------------------------------*/
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void SHSceneNode::SetParent(SHSceneNode* parentNode) noexcept
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{
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if (parentNode == nullptr)
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SHLOG_WARNING("Removing Entity {}'s parent", entityID)
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if (parentNode == parent)
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return;
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parent = parentNode;
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// Update parent's children
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parent->AddChild(this);
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}
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void SHSceneGraph::SetParent(EntityID entityID, SHSceneNode* parent) const noexcept
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{
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if (!SHEntityManager::IsValidEID(entityID))
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{
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SHLOG_ERROR("Entity {} is invalid!", entityID)
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return;
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}
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const auto NODE_ITER = entityNodeMap.find(entityID);
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if (NODE_ITER == entityNodeMap.end())
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{
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SHLOG_WARNING("Entity {} cannot be found in the scene!", entityID)
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return;
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}
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NODE_ITER->second->SetParent(parent);
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}
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void SHSceneGraph::SetParent(EntityID entityID, EntityID parent) const noexcept
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{
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if (!SHEntityManager::IsValidEID(entityID))
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{
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SHLOG_ERROR("Entity {} is invalid! Unable to set parent of an invalid entity!", entityID)
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return;
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}
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if (!SHEntityManager::IsValidEID(parent))
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{
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SHLOG_ERROR("Parent Entity {} is invalid! Unable to set Entity {}'s parent!", parent, entityID)
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return;
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}
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auto NODE_ITER = entityNodeMap.find(entityID);
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if (NODE_ITER == entityNodeMap.end())
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{
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SHLOG_WARNING("Entity {} cannot be found in the scene! Unable to set parent!", entityID)
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return;
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}
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auto PARENT_ITER = entityNodeMap.find(entityID);
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if (PARENT_ITER == entityNodeMap.end())
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{
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SHLOG_WARNING("Entity {} cannot be found in the scene! Unable to parent to Entity {}", parent, entityID)
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return;
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}
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SHSceneNode* currentNode = NODE_ITER->second;
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currentNode->SetParent(PARENT_ITER->second);
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}
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/*-----------------------------------------------------------------------------------*/
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/* Public Function Member Definitions */
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/*-----------------------------------------------------------------------------------*/
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void SHSceneNode::AddChild(SHSceneNode* newChild) noexcept
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{
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if (newChild == nullptr)
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{
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SHLOG_WARNING("Attempting to add a non-existent child to an entity!")
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return;
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}
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children.emplace_back(newChild);
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}
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bool SHSceneNode::RemoveChild(EntityID childID) noexcept
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{
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if (!SHEntityManager::IsValidEID(childID))
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{
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SHLOG_ERROR("Entity {} is invalid!", childID)
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return false;
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}
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SHSceneNode* removedChild = nullptr;
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const auto ENTITY_MATCH = [&](SHSceneNode* node)
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{
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if (node->GetEntityID() == childID)
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{
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removedChild = node;
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return true;
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}
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return false;
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};
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children.end() = std::remove_if(children.begin(), children.end(), ENTITY_MATCH);
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removedChild->parent = nullptr;
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return removedChild == nullptr;
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}
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bool SHSceneNode::RemoveChild(SHSceneNode* childToRemove) noexcept
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{
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if (childToRemove == nullptr)
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{
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SHLOG_WARNING("Attempting to remove non-existent child from Entity {}", entityID)
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return false;
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}
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children.end() = std::remove(children.begin(), children.end(), childToRemove);
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childToRemove->parent = nullptr;
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return true;
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}
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void SHSceneNode::RemoveAllChildren() noexcept
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{
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for (const auto child : children)
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child->parent = nullptr;
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children.clear();
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}
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SHSceneNode* SHSceneGraph::AddNode(EntityID entityID, SHSceneNode* parent)
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{
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if (!SHEntityManager::IsValidEID(entityID))
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{
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SHLOG_ERROR("Entity {} is invalid!", entityID)
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return nullptr;
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}
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if (auto NODE_ITER = entityNodeMap.find(entityID); NODE_ITER != entityNodeMap.end())
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{
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SHLOG_WARNING("Entity {} already exists in the scene!", entityID)
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return NODE_ITER->second;
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}
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SHSceneNode* newNode = AllocateNode(entityID);
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newNode->SetParent(parent);
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return newNode;
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}
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bool SHSceneGraph::RemoveNode(EntityID entityID) noexcept
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{
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if (!SHEntityManager::IsValidEID(entityID))
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{
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SHLOG_ERROR("Entity {} is invalid!", entityID)
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return false;
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}
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auto NODE_ITER = entityNodeMap.find(entityID);
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if (NODE_ITER == entityNodeMap.end())
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{
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SHLOG_WARNING("Entity {} does not exist in the scene!", entityID)
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return false;
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}
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// Remove reference of current node from parent
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SHSceneNode* currentNode = NODE_ITER->second;
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SHSceneNode* parent = currentNode->GetParent();
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if (parent != nullptr)
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parent->RemoveChild(currentNode);
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ReleaseNode(currentNode);
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return true;
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}
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bool SHSceneGraph::RemoveNode(SHSceneNode* nodeToRemove) noexcept
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{
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// Remove reference of current node from parent
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SHSceneNode* parent = nodeToRemove->GetParent();
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if (parent != nullptr)
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parent->RemoveChild(nodeToRemove);
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ReleaseNode(nodeToRemove);
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return true;
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}
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void SHSceneGraph::Reset() noexcept
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{
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for (auto* node : entityNodeMap | std::views::values)
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ReleaseNode(node);
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}
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/*-----------------------------------------------------------------------------------*/
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/* Private Function Member Definitions */
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/*-----------------------------------------------------------------------------------*/
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SHSceneNode* SHSceneGraph::AllocateNode(EntityID entityID)
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{
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SHSceneNode* newNode = new SHSceneNode{entityID};
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#ifdef _DEBUG
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SHLOG_INFO("Allocated a new Scene Node for Entity {}!", entityID)
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#endif
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entityNodeMap.emplace(entityID, newNode);
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return newNode;
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}
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void SHSceneGraph::ReleaseNode(SHSceneNode* node) noexcept
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{
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SHASSERT(node != nullptr, "Attempting to release Invalid Node!")
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// Remove parent's reference to this node if there is a parent
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if (node->GetParent() != nullptr)
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node->GetParent()->RemoveChild(node);
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// Remove child's references to this node. Children end up as floating nodes.
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for (auto* child : node->GetChildren())
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{
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child->SetParent(nullptr);
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}
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|
||||
entityNodeMap.erase(node->GetEntityID());
|
||||
delete node;
|
||||
}
|
||||
|
||||
} // namespace SHADE
|
||||
|
|
@ -0,0 +1,143 @@
|
|||
/****************************************************************************************
|
||||
* \file SHSceneGraph.h
|
||||
* \author Diren D Bharwani, diren.dbharwani, 390002520
|
||||
* \brief Interface for a Scene Graph & Scene Nodes.
|
||||
*
|
||||
* \copyright Copyright (C) 2022 DigiPen Institute of Technology. Reproduction or
|
||||
* disclosure of this file or its contents without the prior written consent
|
||||
* of DigiPen Institute of Technology is prohibited.
|
||||
****************************************************************************************/
|
||||
|
||||
#pragma once
|
||||
|
||||
#include <vector>
|
||||
|
||||
// Project Headers
|
||||
#include "Engine/ECS_Base/Entity/SHEntity.h"
|
||||
|
||||
namespace SHADE
|
||||
{
|
||||
/*-----------------------------------------------------------------------------------*/
|
||||
/* Type Definitions */
|
||||
/*-----------------------------------------------------------------------------------*/
|
||||
|
||||
class SHSceneNode
|
||||
{
|
||||
public:
|
||||
/*---------------------------------------------------------------------------------*/
|
||||
/* Data Members */
|
||||
/*---------------------------------------------------------------------------------*/
|
||||
|
||||
bool isActive;
|
||||
|
||||
/*---------------------------------------------------------------------------------*/
|
||||
/* Constructors & Destructor */
|
||||
/*---------------------------------------------------------------------------------*/
|
||||
|
||||
~SHSceneNode () = default;
|
||||
|
||||
SHSceneNode (EntityID eid, SHSceneNode* parent = nullptr) noexcept;
|
||||
SHSceneNode (const SHSceneNode& rhs) noexcept;
|
||||
SHSceneNode (SHSceneNode&& rhs) noexcept;
|
||||
SHSceneNode& operator= (const SHSceneNode& rhs) noexcept;
|
||||
SHSceneNode& operator= (SHSceneNode&& rhs) noexcept;
|
||||
|
||||
/*---------------------------------------------------------------------------------*/
|
||||
/* Getter Functions */
|
||||
/*---------------------------------------------------------------------------------*/
|
||||
|
||||
[[nodiscard]] EntityID GetEntityID () const noexcept { return entityID ;}
|
||||
[[nodiscard]] SHSceneNode* GetParent () const noexcept { return parent; }
|
||||
[[nodiscard]] std::vector<SHSceneNode*>& GetChildren () noexcept { return children; }
|
||||
|
||||
[[nodiscard]] SHSceneNode* GetChild (EntityID childID) const noexcept;
|
||||
|
||||
/*---------------------------------------------------------------------------------*/
|
||||
/* Setter Functions */
|
||||
/*---------------------------------------------------------------------------------*/
|
||||
|
||||
void SetParent (SHSceneNode* parentNode) noexcept;
|
||||
|
||||
/*---------------------------------------------------------------------------------*/
|
||||
/* Function Members */
|
||||
/*---------------------------------------------------------------------------------*/
|
||||
|
||||
void AddChild (SHSceneNode* newChild) noexcept;
|
||||
|
||||
bool RemoveChild (EntityID childID) noexcept;
|
||||
bool RemoveChild (SHSceneNode* childToRemove) noexcept;
|
||||
|
||||
void RemoveAllChildren () noexcept;
|
||||
|
||||
private:
|
||||
EntityID entityID;
|
||||
SHSceneNode* parent;
|
||||
std::vector<SHSceneNode*> children;
|
||||
};
|
||||
|
||||
class SHSceneGraph
|
||||
{
|
||||
public:
|
||||
/*---------------------------------------------------------------------------------*/
|
||||
/* Type Definitions */
|
||||
/*---------------------------------------------------------------------------------*/
|
||||
|
||||
using EntityNodeMap = std::unordered_map<EntityID, SHSceneNode*>;
|
||||
|
||||
/*---------------------------------------------------------------------------------*/
|
||||
/* Constructors & Destructor */
|
||||
/*---------------------------------------------------------------------------------*/
|
||||
|
||||
SHSceneGraph () noexcept;
|
||||
~SHSceneGraph () noexcept;
|
||||
|
||||
SHSceneGraph (const SHSceneGraph&) = delete;
|
||||
SHSceneGraph (SHSceneGraph&&) = delete;
|
||||
SHSceneGraph& operator= (const SHSceneGraph&) = delete;
|
||||
SHSceneGraph& operator= (SHSceneGraph&&) = delete;
|
||||
|
||||
/*---------------------------------------------------------------------------------*/
|
||||
/* Getter Functions */
|
||||
/*---------------------------------------------------------------------------------*/
|
||||
|
||||
[[nodiscard]] SHSceneNode* GetRoot () const noexcept;
|
||||
[[nodiscard]] SHSceneNode* GetNode (EntityID entityID) const noexcept;
|
||||
[[nodiscard]] SHSceneNode* GetParent (EntityID entityID) const noexcept;
|
||||
[[nodiscard]] SHSceneNode* GetChild (EntityID entityID, SHSceneNode* childNode) const noexcept;
|
||||
[[nodiscard]] SHSceneNode* GetChild (EntityID entityID, EntityID childEntityID) const noexcept;
|
||||
[[nodiscard]] const std::vector<SHSceneNode*>& GetChildren (EntityID entityID) const noexcept;
|
||||
|
||||
/*---------------------------------------------------------------------------------*/
|
||||
/* Setter Functions */
|
||||
/*---------------------------------------------------------------------------------*/
|
||||
|
||||
void SetParent (EntityID entityID, SHSceneNode* parent) const noexcept;
|
||||
void SetParent (EntityID entityID, EntityID parent) const noexcept;
|
||||
|
||||
/*---------------------------------------------------------------------------------*/
|
||||
/* Function Members */
|
||||
/*---------------------------------------------------------------------------------*/
|
||||
|
||||
SHSceneNode* AddNode (EntityID entityID, SHSceneNode* parent = nullptr);
|
||||
bool RemoveNode (EntityID entityID) noexcept;
|
||||
bool RemoveNode (SHSceneNode* nodeToRemove) noexcept;
|
||||
void Reset () noexcept;
|
||||
|
||||
private:
|
||||
/*---------------------------------------------------------------------------------*/
|
||||
/* Data Members */
|
||||
/*---------------------------------------------------------------------------------*/
|
||||
|
||||
SHSceneNode* root;
|
||||
EntityNodeMap entityNodeMap;
|
||||
|
||||
/*---------------------------------------------------------------------------------*/
|
||||
/* Function Members */
|
||||
/*---------------------------------------------------------------------------------*/
|
||||
|
||||
SHSceneNode* AllocateNode (EntityID entityID);
|
||||
void ReleaseNode (SHSceneNode* node) noexcept;
|
||||
};
|
||||
|
||||
|
||||
} // namespace SHADE
|
||||
Loading…
Reference in New Issue