Boat Attack使用了Universal RP的许多新图形功能,可以用于探索 Universal RP 的使用方式和技巧。
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143 行
3.6 KiB

using UnityEngine;
using System;
using System.Collections;
using System.Collections.Generic;
namespace UnityEditor.Experimental.Rendering.Universal.Path2D
{
[Serializable]
internal abstract class SerializableSelection<T> : ISelection<T>, ISerializationCallbackReceiver
{
internal readonly static int kInvalidID = -1;
[SerializeField]
private T[] m_Keys = new T[0];
private HashSet<T> m_Selection = new HashSet<T>();
private HashSet<T> m_TemporalSelection = new HashSet<T>();
private bool m_SelectionInProgress = false;
public int Count
{
get { return m_Selection.Count + m_TemporalSelection.Count; }
}
public T activeElement
{
get { return First(); }
set
{
Clear();
Select(value, true);
}
}
public T[] elements
{
get
{
var set = m_Selection;
if (m_SelectionInProgress)
{
var union = new HashSet<T>(m_Selection);
union.UnionWith(m_TemporalSelection);
set = union;
}
return new List<T>(set).ToArray();
}
set
{
Clear();
foreach(var element in value)
Select(element, true);
}
}
protected abstract T GetInvalidElement();
public void Clear()
{
GetSelection().Clear();
}
public void BeginSelection()
{
m_SelectionInProgress = true;
Clear();
}
public void EndSelection(bool select)
{
m_SelectionInProgress = false;
if (select)
m_Selection.UnionWith(m_TemporalSelection);
else
m_Selection.ExceptWith(m_TemporalSelection);
m_TemporalSelection.Clear();
}
public bool Select(T element, bool select)
{
var changed = false;
if(EqualityComparer<T>.Default.Equals(element, GetInvalidElement()))
return changed;
if (select)
changed = GetSelection().Add(element);
else if (Contains(element))
changed = GetSelection().Remove(element);
return changed;
}
public bool Contains(T element)
{
return m_Selection.Contains(element) || m_TemporalSelection.Contains(element);
}
private HashSet<T> GetSelection()
{
if (m_SelectionInProgress)
return m_TemporalSelection;
return m_Selection;
}
private T First()
{
T element = First(m_Selection);
if(EqualityComparer<T>.Default.Equals(element, GetInvalidElement()))
element = First(m_TemporalSelection);
return element;
}
private T First(HashSet<T> set)
{
if(set.Count == 0)
return GetInvalidElement();
using (var enumerator = set.GetEnumerator())
{
Debug.Assert(enumerator.MoveNext());
return enumerator.Current;
}
}
void ISerializationCallbackReceiver.OnBeforeSerialize()
{
m_Keys = new List<T>(m_Selection).ToArray();
}
void ISerializationCallbackReceiver.OnAfterDeserialize()
{
elements = m_Keys;
}
}
}