直线型地图点连线模拟

 1 using System.Collections;
 2 using System.Collections.Generic;
 3 using UnityEngine;
 4 
 5 public class Test : MonoBehaviour
 6 {
 7     public Transform Transfor_Node1;
 8     public Transform Transfor_Node2;
 9     public RectTransform RectTransform_Line;
10 
11     void Update()
12     {
13         if (Input.GetKeyDown(KeyCode.A))
14             SetLine(Transfor_Node1, Transfor_Node2);
15     }
16 
17     void SetLine(Transform node1, Transform node2)
18     {
19         //设置位置
20         Vector3 centerPos = (node1.position + node2.position) * 0.5f;
21         RectTransform_Line.position = centerPos;
22 
23         //设置宽度
24         float width = Vector3.Distance(node1.localPosition, node2.localPosition);
25         RectTransform_Line.sizeDelta = new Vector2(width, RectTransform_Line.sizeDelta.y);
26 
27         //设置旋转 - 需要搞清楚旋转的方向
28         Vector3 direction = node2.position - node1.position;
29         //这里只是计算出了两个方向的夹角，旋转的方向还未确定
30         float angle = Vector3.Angle(Vector3.right, direction);
31         //方式一 : 确定旋转方向
32         //if (direction.y < 0)
33         //    angle *= -1;
34 
35         //方式二 : 确定旋转方向
36         Vector3 noramalVec = Vector3.Cross(Vector3.right, direction);  //计算着两个向量的确定的平面的法向量(右手坐标系)
37         float flag = Vector3.Dot(Vector3.forward, noramalVec);
38         if (flag < 0)
39             angle *= -1;
40 
41         RectTransform_Line.rotation = Quaternion.Euler(0, 0, angle);
42     }
43 }

1  float width = Vector3.Distance(node1.position, node2.position);