1 files changed, 106 insertions, 0 deletions
diff --git a/AlienSurvival/Assets/Scripts/Physics/TopDownTransform.cs b/AlienSurvival/Assets/Scripts/Physics/TopDownTransform.cs
new file mode 100644
index 0000000..3bb51b1
--- /dev/null
+++ b/AlienSurvival/Assets/Scripts/Physics/TopDownTransform.cs
@@ -0,0 +1,106 @@
+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
+/// </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 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();
+		}
+	}
+	/// <summary>
+	/// “投影”，把坐标转换到Transform上
+	/// </summary>
+	public void Project()
+	{
+		Vector3 pos = transform.position;
+		pos.x = m_LocalPosition.x;
+		pos.y = m_LocalPosition.y + m_LocalPosition.z;
+
+		transform.position = pos;
+	}
+
+	private void Update()
+	{
+		Project();
+	}
+
+	public Vector3 Get3DPosition()
+	{
+		Vector3 pos = new Vector3();
+		pos.x = m_LocalPosition.x;
+		pos.y = m_LocalPosition.y + m_LocalPosition.z;
+		pos.z = transform.position.z;
+		return pos;
+	}
+
+#if UNITY_EDITOR
+	private void OnDrawGizmos()
+	{
+		// dash line 
+		Vector3 start = transform.position;
+		Vector3 end = start - new Vector3(0, m_LocalPosition.z, 0);
+
+		Handles.DrawDottedLine(start, end, 1f);
+		Handles.DrawWireCube(end, new Vector3(0.1f, 0.1f, 0f));
+	}
+#endif
+
+}
+\ No newline at end of file