坐标系变换 - 坐标系 - 矩阵 - 游戏数学 | Fasty Blog = 指尖小屋

# 坐标转换

已知云端坐标点 A（10,10），需要转换到本地坐标轴下的位置 B？

# 可能的问题

坐标平移
坐标旋转

# 参考

Unity 不同空间坐标转换中的矩阵应用_心之凌儿的博客 - CSDN 博客_unity 空间变换

# Unity 中内置转换

	using UnityEngine;

	/// <summary>
	/// 坐标转换工具类
	/// </summary>
	public static class CTUtils
	{
	/// <summary>
	/// 世界坐标转屏幕坐标
	/// </summary>
	public static Vector2 World2Screen(Vector3 wp, Camera camera = null)
	{
	if (camera == null)
	{
	camera = Camera.main;
	}
	return camera.WorldToScreenPoint(wp);
	}

	/// <summary>
	/// 屏幕坐标转世界坐标
	/// </summary>
	public static Vector3 Screen2World(Vector3 sp, Camera camera = null)
	{
	if (camera == null)
	{
	camera = Camera.main;
	}
	return camera.ScreenToWorldPoint(sp);
	}

	/// <summary>
	/// 世界坐标转视口坐标
	/// </summary>
	public static Vector2 World2Viewport(Vector3 wp, Camera camera = null)
	{
	if (camera == null)
	{
	camera = Camera.main;
	}
	return camera.WorldToViewportPoint(wp);
	}

	/// <summary>
	/// 视口坐标转世界坐标
	/// </summary>
	public static Vector3 Viewport2World(Vector3 vp, Camera camera = null)
	{
	if (camera == null)
	{
	camera = Camera.main;
	}
	return camera.ViewportToWorldPoint(vp);
	}

	/// <summary>
	/// 屏幕坐标转视口坐标
	/// </summary>
	public static Vector2 Screen2Viewport(Vector2 sp, Camera camera = null)
	{
	if (camera == null)
	{
	camera = Camera.main;
	}
	return camera.ScreenToViewportPoint(sp);
	}

	/// <summary>
	/// 视口坐标转屏幕坐标
	/// </summary>
	public static Vector2 Viewport2Screen(Vector2 vp, Camera camera = null)
	{
	if (camera == null)
	{
	camera = Camera.main;
	}
	return camera.ViewportToScreenPoint(vp);
	}

	/// <summary>
	/// 屏幕坐标转 UI 坐标
	/// </summary>
	public static Vector2 Screen2UI(Vector2 sp, RectTransform rect, Camera camera = null)
	{
	Vector2 uiLocalPos;
	RectTransformUtility.ScreenPointToLocalPointInRectangle(rect, sp, camera, out uiLocalPos);
	return uiLocalPos;
	}

	/// <summary>
	/// 世界坐标转 UI 坐标
	/// </summary>
	/// <param name="isUIObj"> 是否为 ui 物体 & lt;/param>
	public static Vector2 World2UI(bool isUIObj, Vector3 wp, RectTransform rect, Camera uiCamera, Camera worldCamera = null)
	{
	if (worldCamera == null)
	{
	worldCamera = Camera.main;
	}
	Vector2 screenPos = World2Screen(wp, isUIObj ? uiCamera : worldCamera);
	return Screen2UI(screenPos, rect, uiCamera);
	}
	}