From ded822e98e8eda49618d17e53407b0df1896e539 Mon Sep 17 00:00:00 2001
From: chai <chaifix@163.com>
Date: Fri, 22 Apr 2022 19:24:15 +0800
Subject: * rename AlienSurvival project to SurvivalTest

---
 .../Assets/Scripts/TopDown/TopDownTransform.cs     | 224 +++++++++++++++++++++
 1 file changed, 224 insertions(+)
 create mode 100644 SurvivalTest/Assets/Scripts/TopDown/TopDownTransform.cs

(limited to 'SurvivalTest/Assets/Scripts/TopDown/TopDownTransform.cs')

diff --git a/SurvivalTest/Assets/Scripts/TopDown/TopDownTransform.cs b/SurvivalTest/Assets/Scripts/TopDown/TopDownTransform.cs
new file mode 100644
index 0000000..103e214
--- /dev/null
+++ b/SurvivalTest/Assets/Scripts/TopDown/TopDownTransform.cs
@@ -0,0 +1,224 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+#if UNITY_EDITOR
+using UnityEditor;
+#endif
+
+/// <summary>
+/// 用于TopDown的Transform，支持模拟垂直高度，不允许旋转和缩放
+/// TopDownTransform的父节点必须也是TopDownTransform，Transform的父节点可以是TopDownTransform
+/// </summary>
+[ExecuteInEditMode]
+[RequireComponent(typeof(Transform))]
+public class TopDownTransform : MonoBehaviour
+{
+	// 右手系
+	//  z
+	//  |
+	//  |  /y
+	//  | /
+	//  |/______x
+
+	// x, y, z ( z = height)
+	[SerializeField] private Vector3 m_LocalPosition;
+
+	// 只能绕一个虚拟轴旋转
+	//[SerializeField] private float m_LocalRotation;
+
+	// x, z
+	//[SerializeField] private Vector2 m_LocalScale;
+
+	public Vector3 localPosition
+	{
+		get
+		{
+			return m_LocalPosition;
+		}
+		set
+		{
+			m_LocalPosition = value;
+			Project();
+		}
+	}
+
+	public float x
+	{
+		get
+		{
+			return m_LocalPosition.x;
+		}
+		set
+		{
+			m_LocalPosition.x = value;
+			Project();
+		}
+	}
+	public float y
+	{
+		get
+		{
+			return m_LocalPosition.y;
+		}
+		set
+		{
+			m_LocalPosition.y = value;
+			Project();
+		}
+	}
+
+	public float z
+	{
+		get
+		{
+			return m_LocalPosition.z;
+		}
+		set
+		{
+			m_LocalPosition.z = value;
+			Project();
+		}
+	}
+
+	public float height
+	{
+		get
+		{
+			return z;
+		}
+		set
+		{
+			z = value;
+		}
+	}
+
+	/// <summary>
+	/// 全局坐标
+	/// </summary>
+	public Vector3 position
+	{
+		get
+		{
+			Vector3 pos = m_LocalPosition;
+			Transform self = this.transform; 
+			while(self.parent != null)
+			{
+				TopDownTransform parentTransform = self.parent.GetComponent<TopDownTransform>();
+				if (parentTransform == null)
+				{
+					Debug.LogError("Parent is not TopDownTransform");
+					continue;
+				}
+				pos += parentTransform.m_LocalPosition;
+				self = self.parent;
+			}
+			return pos;
+		}
+		set
+		{
+			Vector3 pos = value;
+			Transform self = this.transform;
+			while (self.parent != null)
+			{
+				TopDownTransform parentTransform = self.parent.GetComponent<TopDownTransform>();
+				if (parentTransform == null)
+				{
+					Debug.LogError("Parent is not TopDownTransform");
+					continue;
+				}
+				pos -= parentTransform.m_LocalPosition;
+				self = self.parent;
+			}
+			m_LocalPosition = pos;
+			Project();
+		}
+	}
+
+	/// <summary>
+	/// 地表坐标（Topdown空间）
+	/// </summary>
+	public Vector3 positionOnGround
+	{
+		get
+		{
+			Vector3 pos = position;
+			pos.z = 0;
+			return pos;
+		}
+		set
+		{
+			Vector3 pos = position;
+			pos.x = value.x;
+			pos.y = value.y;
+			position = pos;
+			Project();
+		}
+	}
+
+	/// <summary>
+	/// “投影”，把坐标转换到Transform上
+	/// </summary>
+	public void Project()
+	{
+		Vector3 pos = transform.localPosition;
+		pos.x = m_LocalPosition.x;
+		pos.y = m_LocalPosition.y + m_LocalPosition.z;
+
+		transform.localPosition = pos;
+	}
+
+	private void Awake()
+	{
+		SpriteRenderer sr = GetComponent<SpriteRenderer>();
+		if (sr)
+		{
+			gameObject.AddOrGetComponent<TopDownSorting>();
+			//gameObject.AddOrGetComponent<TopDownShadowCaster>();
+		}
+	}
+
+	private void Update()
+	{
+		Project();
+	}
+
+	#region 转换到Transform坐标
+	public Vector3 GetProjectedPosition()
+	{
+		Vector3 posTD = position;
+
+		Vector3 pos = new Vector3();
+		pos.x = posTD.x;
+		pos.y = posTD.y + posTD.z;
+		pos.z = transform.position.z;
+		return pos;
+	}
+
+	/// <summary>
+	/// 注意是在3D空间下
+	/// </summary>
+	/// <returns></returns>
+	public Vector3 GetProjectedGroundPosition()
+	{
+		Vector3 posTD = position;
+
+		Vector3 pos = new Vector3();
+		pos.x = posTD.x;
+		pos.y = posTD.y;
+		pos.z = transform.position.z;
+		return pos;
+	}
+	#endregion 
+
+#if UNITY_EDITOR
+	private void OnDrawGizmos()
+	{
+		Vector3 start = TopDownUtils.Project(position);
+		Vector3 end = TopDownUtils.Project(positionOnGround);
+
+		Handles.DrawDottedLine(start, end, 1f);
+		Handles.DrawWireCube(end, new Vector3(0.1f, 0.1f, 0f));
+	}
+#endif
+
+}
\ No newline at end of file
-- 
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