测试两点之间距离的代码 - 纳金网

using UnityEngine;
using System.Collections;
using System.Collections.Generic;
public class CeJu : MonoBehaviour
{
private GameObject[] gameObj = new GameObject[2];
int i = 0;
void Update()
{
//按下鼠标左键时响应该方法
if (Input.GetMouseButtonDown(0))
{
//创建一条射线一摄像机为原点
Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
RaycastHit hit;
//射线碰撞到游戏地形时
if (Physics.Raycast(ray, out hit))
{
//在点击的位置实例出一个Cube
Vector3 post = new Vector3(hit.point.x, hit.point.y + 0.5f, hit.point.z);
GameObject obj = Instantiate(Resources.Load("1"), hit.point, Quaternion.identity) as GameObject;
obj.transform.position = post;
gameObj[i] = obj;
if (i == 1)
{
//两点之间实例出一条线
LineRenderer linerenderer = obj.AddComponent<LineRenderer>();
linerenderer.SetPosition(0, gameObj[0].transform.position);
linerenderer.SetPosition(1, gameObj[1].transform.position);
linerenderer.SetWidth(0.1f,0.1f);
i = -1;
}
i++;
}
}
}
}

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using UnityEngine;
using System.Collections;
using System.Collections.Generic;
public class Taggle : MonoBehaviour
{
//定义一个位置的集合
List<Vector3> PointTransform = new List<Vector3>();
//定义一个路标
public GameObject LuBiao;
int PositionCount;
//定义一个实例化出物体的集合
List<GameObject> InstateGameObject = new List<GameObject>();
public GameObject Line;
//连线集合
List<GameObject> LineList = new List<GameObject>();
// Use this for initialization
void Start()
{
PositionCount = 0;
}
// Update is called once per frame
void Update()
{
if (Input.GetMouseButtonDown(0))
{
//从摄像机发出到点击坐标的射线
Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
RaycastHit hitInfo;
if (Physics.Raycast(ray, out hitInfo))
{
//划出射线，只有在scene视图中才能看到
Debug.DrawLine(ray.origin, hitInfo.point);
Vector3 RemeberPosition = hitInfo.point;
//添加到位置集合中
PointTransform.Add(RemeberPosition);
GameObject gam = Instantiate(LuBiao, RemeberPosition, Quaternion.identity) as GameObject;
//添加到实例标记点的的集合中
InstateGameObject.Add(gam);
//定义的初始值小雨实例出来的标记物体个数并且满足实例出来的物体数量不小于或等与一个
if (PositionCount < InstateGameObject.Count && InstateGameObject.Count > 1)
{
//计算两个点的中点坐标
Vector3 tempPos = (InstateGameObject[PositionCount].transform.position + InstateGameObject[PositionCount + 1].transform.position) / 2;
//在两个点的中点处实例化线条，因为对物体的缩放，是从中心向两边延伸
GameObject go = (GameObject)Instantiate(Line, tempPos, Quaternion.identity);
go.name = "" + PositionCount;
//实例出线条并添加到连线的集合中
LineList.Add(go);
//改变线条的朝向
go.transform.right = (go.transform.position - InstateGameObject[PositionCount].transform.position).normalized;
//计算两点的距离
float distance = Vector3.Distance(InstateGameObject[PositionCount].transform.position, InstateGameObject[PositionCount + 1].transform.position);
//延长线条，连接两点。
go.transform.localScale = new Vector3(distance, 0.01f, 0.01f);
PositionCount++;
}
}
}
}
void OnGUI()
{
if (GUI.Button(new Rect(10, 10, 50, 50), "测量"))
{
//初始距离为0
float Number = 0;
//遍历循环位置的集合
for (int i = 1; i < PointTransform.Count; i++)
{
//当满足位置集合不为空
if (PointTransform[i] != null && PointTransform[i - 1] != null)
{
//计算出长度
float a = Vector3.Distance(PointTransform[i], PointTransform[i - 1]);
//
Number += a;
Debug.Log(i + " " + a);//其中i表是第几段线条 a表示长度
}
}
//打印出距离的总长度
Debug.Log(Number);
//清除所有的位置
PointTransform.Clear();
//销毁所有的标记物体
for (int i = 0; i < InstateGameObject.Count; i++)
{
Destroy(InstateGameObject[i]);
}
//销毁所有的线条
for (int i = 0; i < LineList.Count; i++)
{
Destroy(LineList[i]);
}
//清除所有线条
InstateGameObject.Clear();
}
}
}

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