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EntityBuilder.cs
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EntityBuilder.cs
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using System;
using System.Collections.Generic;
using System.Linq;
using Plugins.ECSEntityBuilder.Archetypes;
using Plugins.ECSEntityBuilder.InstantiationStrategy;
using Plugins.ECSEntityBuilder.Steps;
using Plugins.ECSEntityBuilder.Variables;
using Unity.Entities;
using Unity.Mathematics;
using UnityEngine;
namespace Plugins.ECSEntityBuilder
{
public abstract class EntityBuilder
{
public delegate void OnPreBuildDelegate();
public delegate void OnPostBuildDelegate(EntityWrapper entityWrapper);
protected bool isBuilt;
protected IEntityCreationStrategy creationStrategy = CreateEmptyStrategy.DEFAULT;
protected EntityVariableMap variables;
protected readonly LinkedList<IEntityBuilderStep> steps = new LinkedList<IEntityBuilderStep>();
public event OnPreBuildDelegate OnPreBuildHandler;
public event OnPostBuildDelegate OnPostBuildHandler;
~EntityBuilder()
{
if (!isBuilt)
{
throw new Exception($"EntityBuilder {GetType()} was never built");
}
}
public bool HasStep<T, TGeneric>() where T : IEntityBuilderGenericStep<TGeneric>
{
return steps.FirstOrDefault(x => x is IEntityBuilderGenericStep<TGeneric>) != null;
}
public EntityBuilder AddStep(IEntityBuilderStep step)
{
steps.AddLast(step);
return this;
}
public EntityBuilder SetVariable<T>(T variable) where T : class, IEntityVariable
{
if (variables == null)
variables = new EntityVariableMap();
variables.Set(variable);
return this;
}
protected EntityBuilder CreateEmpty()
{
creationStrategy = new CreateEmptyStrategy();
return this;
}
public EntityBuilder SetCreationStrategy(IEntityCreationStrategy strategy)
{
creationStrategy = strategy;
return this;
}
protected EntityBuilder CreateFromArchetype<T>() where T : IArchetypeDescriptor
{
creationStrategy = new CreateFromArchetypeStrategy<T>();
return this;
}
protected EntityBuilder CreateFromPrefab(Entity prefabEntity)
{
creationStrategy = new CreateFromPrefabStrategy(prefabEntity);
return this;
}
public EntityBuilder AddComponent<T>() where T : struct, IComponentData
{
GetOrCreateGenericStep<AddComponentStep<T>, T>();
return this;
}
public EntityBuilder AddComponentData<T>(T component) where T : struct, IComponentData
{
GetOrCreateGenericStep<AddComponentDataStep<T>, T>().SetValue(component);
return this;
}
public EntityBuilder AddComponentObject<T>(T componentObject) where T : Component
{
GetOrCreateGenericStep<AddComponentObjectStep<T>, T>().SetValue(componentObject);
return this;
}
public EntityBuilder SetComponentData<T>(T component) where T : struct, IComponentData
{
GetOrCreateStep<SetComponentDataStep<T>>().SetValue(component);
return this;
}
public EntityBuilder SetName(string name)
{
GetOrCreateStep<SetNameStep>().SetValue(name);
return this;
}
public EntityBuilder SetTranslation(float3 translation)
{
GetOrCreateStep<SetTranslationStep>().SetValue(translation);
return this;
}
public EntityBuilder SetRotation(quaternion quaternion)
{
GetOrCreateStep<SetRotationStep>().SetValue(quaternion);
return this;
}
public EntityBuilder SetRotation(float3 euler)
{
var quaternion = Unity.Mathematics.quaternion.Euler(euler);
GetOrCreateStep<SetRotationStep>().SetValue(quaternion);
return this;
}
public EntityBuilder SetRotationAngles(float3 eulerAngles)
{
var quaternion = Unity.Mathematics.quaternion.Euler(
math.radians(eulerAngles.x), math.radians(eulerAngles.y), math.radians(eulerAngles.z)
);
GetOrCreateStep<SetRotationStep>().SetValue(quaternion);
return this;
}
public EntityBuilder AddSharedComponentData<T>(T component) where T : struct, ISharedComponentData
{
GetOrCreateGenericStep<AddSharedComponentDataStep<T>, T>().SetValue(component);
return this;
}
public T GetOrCreateGenericStep<T, TGenericValue>() where T : IEntityBuilderGenericStep<TGenericValue>, new()
{
var singletonStep = steps.FirstOrDefault(x => x is IEntityBuilderGenericStep<TGenericValue>);
if (singletonStep != null)
return (T) singletonStep;
var createdSingletonStep = new T();
steps.AddLast(createdSingletonStep);
return createdSingletonStep;
}
public T GetOrCreateStep<T>() where T : IEntityBuilderStep, new()
{
var singletonStep = steps.FirstOrDefault(x => x.GetType() == typeof(T));
if (singletonStep != null)
return (T) singletonStep;
var createdSingletonStep = new T();
steps.AddLast(createdSingletonStep);
return createdSingletonStep;
}
public EntityBuilder AddBuffer<T>(params T[] elements) where T : struct, IBufferElementData
{
var step = GetOrCreateGenericStep<AddBufferStep<T>, T>();
foreach (var element in elements)
step.Add(element);
return this;
}
public EntityBuilder AddElementToBuffer<T>(T element) where T : struct, IBufferElementData
{
GetOrCreateGenericStep<AddBufferStep<T>, T>().Add(element);
return this;
}
public EntityBuilder AddElementsToBuffer<T>(params T[] elements) where T : struct, IBufferElementData
{
foreach (var element in elements)
GetOrCreateGenericStep<AddBufferStep<T>, T>().Add(element);
return this;
}
public EntityBuilder AddElementsToBuffer<T>(IEnumerable<T> elements) where T : struct, IBufferElementData
{
foreach (var element in elements)
GetOrCreateGenericStep<AddBufferStep<T>, T>().Add(element);
return this;
}
public EntityBuilder SetParent(Entity entity)
{
GetOrCreateStep<SetParentStep>().SetValue(entity);
return this;
}
public EntityBuilder SetScale(float scale)
{
GetOrCreateStep<SetScaleStep>().SetValue(scale);
return this;
}
public Entity Build()
{
return Build(EntityManagerWrapper.Default);
}
public Entity Build(EntityManager entityManager)
{
return Build(new EntityManagerWrapper(entityManager));
}
public Entity Build(EntityCommandBuffer entityCommandBuffer)
{
return Build(EntityManagerWrapper.FromCommandBuffer(entityCommandBuffer));
}
public Entity Build(EntityCommandBuffer.ParallelWriter entityCommandBuffer, int threadId)
{
return Build(EntityManagerWrapper.FromJobCommandBuffer(entityCommandBuffer, threadId));
}
public virtual Entity Build(EntityManagerWrapper wrapper)
{
isBuilt = true;
var entity = creationStrategy.Create(wrapper, variables);
OnPreBuildHandler?.Invoke();
OnPreBuild(wrapper);
foreach (var step in steps)
step.Process(wrapper, variables, entity);
OnPostBuildHandler?.Invoke(EntityWrapper.Wrap(entity, wrapper));
return entity;
}
protected virtual void OnPreBuild(EntityManagerWrapper wrapper)
{
}
public EntityWrapper BuildAndWrap(EntityManagerWrapper wrapper)
{
return new EntityWrapper(Build(wrapper), wrapper, variables);
}
public EntityWrapper BuildAndWrap()
{
return BuildAndWrap(EntityManagerWrapper.Default);
}
}
}