124 lines
3.2 KiB
C++
124 lines
3.2 KiB
C++
#include "Core/World.h"
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World::~World()
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{
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for (auto& pool : m_ComponentPools) {
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delete pool.second;
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}
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}
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EntityID World::CreateEntity(EntityID parent /*= 0*/)
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{
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EntityID newEntity = generateEntityID();
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m_EntityParents[newEntity] = parent;
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m_EntityChildren.insert(std::make_pair(parent, newEntity));
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return newEntity;
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}
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void World::DeleteEntity(EntityID entity)
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{
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// Delete components
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for (auto& pair : m_ComponentPools) {
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auto& pool = pair.second;
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if (pool->KnowsEntity(entity)) {
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auto& c = pool->GetByEntity(entity);
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pool->Delete(c);
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}
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}
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// Loop through children
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std::vector<EntityID> childrenToDelete;
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auto children = m_EntityChildren.equal_range(entity);
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for (auto it = children.first; it != children.second; ++it) {
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childrenToDelete.push_back(it->second);
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}
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for (auto& child : childrenToDelete) {
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DeleteEntity(child);
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}
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EntityID parent = m_EntityParents.at(entity);
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m_EntityParents.erase(entity);
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auto parentChildren = m_EntityChildren.equal_range(parent);
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for (auto it = parentChildren.first; it != parentChildren.second; ++it) {
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if (it->second == entity) {
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m_EntityChildren.erase(it);
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break;
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}
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}
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}
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void World::RegisterComponent(ComponentInfo& ci)
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{
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m_ComponentPools[ci.Name] = new ComponentPool(ci);
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}
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ComponentWrapper World::AttachComponent(EntityID entity, std::string componentType)
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{
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ComponentPool* pool = m_ComponentPools.at(componentType);
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const ComponentInfo& ci = pool->ComponentInfo();
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// Allocate space for the component
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ComponentWrapper c = pool->Allocate(entity);
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// Write default values
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memcpy(c.Data, ci.Defaults.get(), ci.Meta.Stride);
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return c;
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}
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bool World::HasComponent(EntityID entity, std::string componentType)
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{
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ComponentPool* pool = m_ComponentPools.at(componentType);
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return pool->KnowsEntity(entity);
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}
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ComponentWrapper World::GetComponent(EntityID entity, std::string componentType)
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{
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ComponentPool* pool = m_ComponentPools.at(componentType);
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return pool->GetByEntity(entity);
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}
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void World::DeleteComponent(EntityID entity, std::string componentType)
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{
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ComponentPool* pool = m_ComponentPools.at(componentType);
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ComponentWrapper c = pool->GetByEntity(entity);
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return pool->Delete(c);
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}
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const ComponentPool* World::GetComponents(std::string componentType)
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{
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auto it = m_ComponentPools.find(componentType);
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return (it != m_ComponentPools.end()) ? it->second : nullptr;
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}
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EntityID World::GetParent(EntityID entity)
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{
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return m_EntityParents.at(entity);
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}
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void World::SetParent(EntityID entity, EntityID parent)
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{
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EntityID lastParent = m_EntityParents.at(entity);
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auto parentChildren = m_EntityChildren.equal_range(lastParent);
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for (auto it = parentChildren.first; it != parentChildren.second; it++) {
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if (it->second == entity) {
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m_EntityChildren.erase(it);
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break;
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}
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}
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m_EntityParents[entity] = parent;
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m_EntityChildren.insert(std::make_pair(parent, entity));
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}
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EntityID World::generateEntityID()
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{
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// TODO: Make EntityID generation smarter
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return m_CurrentEntityID++;
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}
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