接上一博文：射线 ray linerender spotlight
1，小球表示碰撞交点
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class RayCast : MonoBehaviour {
[HideInInspector]
private List<GameObject> hitGObs;
private GameObject headPointer;
private GameObject findColor;
//save the old color and objects
private Dictionary<string, Color> ObjectsColor;
//获取场景中的物体
private GameObject GOB;
void Start () {
headPointer = new GameObject();
headPointer = GameObject.Find ("HeadPointer");
if (headPointer) {
headPointer.GetComponent<MeshRenderer> ().enabled = false;
} else {
Debug.LogError ("cannot find object of HeadPointer");
}
hitGObs = new List<GameObject>(1);
hitGObs.Clear ();
//保存场景中物体的颜色和名称
ObjectsColor = new Dictionary<string, Color> ();
SaveObjectColor ();
GOB = new GameObject ();
}
// Update is called once per frame
void Update () {
//如果写为transform.forward则表示线是无限长
Ray ray=new Ray(transform.position,transform.forward*100); //定义一个射线对象,包含射线发射的位置transform.position，发射距离transform.forward*100；
//drawline in the scene
Debug.DrawLine(transform.position,transform.position+transform.forward*100,Color.red); //这个就是绘制出的射线了，包含发射位置，发射距离和射线的颜色；
RaycastHit hitInfo; //定义一个RaycastHit变量用来保存被撞物体的信息；
//如果碰撞到了物体，hitInfo里面就包含该物体的相关信息；
if (Physics.Raycast (ray, out hitInfo, 100)) {
DrawLineInGame (hitInfo.point);
GameObject hitme = hitInfo.collider.gameObject;
//hitInfo.point:碰撞点的位置；
//hitInfo.normal:与碰撞点所在平面垂直的向量；
//hitInfo.collider.gameobject:可以得到该物体上的所有信息了；
if (hitme.name != "VideoStream" && hitme.name != "Table" && hitme.name != "HeadPointer")
{
hitme.GetComponent<MeshRenderer> ().material.color = Color.green;
//put the hitting objects into the array:hitGObs，以便使其颜色能回到以前的状态
hitGObs.Add (hitme);
} else {
ResetOldColor (hitme);
}
}
else
{
ResetOldColor ();
}
}
void DrawLineInGame (Vector3 point)
{
//render the position of sphere
headPointer.GetComponent<MeshRenderer> ().enabled = true;
headPointer.transform.position = point;
}
//save the whole objects and color
void SaveObjectColor()
{
findColor = GameObject.Find ("01_JiZuo");
ObjectsColor.Add (findColor.name,findColor.GetComponent<MeshRenderer>().material.color);
findColor = GameObject.Find ("02_FangKuaiLuoMu");
ObjectsColor.Add (findColor.name,findColor.GetComponent<MeshRenderer>().material.color);
findColor = GameObject.Find ("03_HuoDongQianShen");
ObjectsColor.Add (findColor.name,findColor.GetComponent<MeshRenderer>().material.color);
findColor = GameObject.Find ("04_LuoGan");
ObjectsColor.Add (findColor.name,findColor.GetComponent<MeshRenderer>().material.color);
findColor = GameObject.Find ("05_LuoDing");
ObjectsColor.Add (findColor.name,findColor.GetComponent<MeshRenderer>().material.color);
findColor = GameObject.Find ("06_HuKouBan");
ObjectsColor.Add (findColor.name,findColor.GetComponent<MeshRenderer>().material.color);
findColor = GameObject.Find ("07_LuoDing_1");
ObjectsColor.Add (findColor.name,findColor.GetComponent<MeshRenderer>().material.color);
findColor = GameObject.Find ("07_LuoDing_2");
ObjectsColor.Add (findColor.name,findColor.GetComponent<MeshRenderer>().material.color);
findColor = GameObject.Find ("07_LuoDing_3");
ObjectsColor.Add (findColor.name,findColor.GetComponent<MeshRenderer>().material.color);
findColor = GameObject.Find ("07_LuoDing_4");
ObjectsColor.Add (findColor.name,findColor.GetComponent<MeshRenderer>().material.color);
findColor = GameObject.Find ("08_LuoMu");
ObjectsColor.Add (findColor.name,findColor.GetComponent<MeshRenderer>().material.color);
findColor = GameObject.Find ("09_HuKouBan");
ObjectsColor.Add (findColor.name,findColor.GetComponent<MeshRenderer>().material.color);
}
//有碰撞时物体颜色的还原
void ResetOldColor(GameObject hitme)
{
foreach (var item in hitGObs) {
foreach (var item_color in ObjectsColor) {
if (item_color.Key == item.name) {
item.GetComponent<MeshRenderer> ().material.color = ObjectsColor[item_color.Key];
}
}
}
hitGObs.Clear ();
}
void ResetOldColor()
{
//这一句将决定小球从物体边界到无穷远处时小球是否会停留在物体边缘感觉不自然
headPointer.GetComponent<MeshRenderer> ().enabled = false;
foreach (var item in ObjectsColor) {
GOB = GameObject.Find (item.Key);
GOB.GetComponent<MeshRenderer>().material.color = ObjectsColor[item.Key];
}
}
void OnDisable()
{
Destroy (GOB);
}
} 
2，linerender表示碰撞交点
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class LineRender : MonoBehaviour {
[Header("LineRendererShow")]
[Tooltip("渲染戴头盔者的注视区域DEBUG0--2")]
public LineRenderer linerenderer;
private GameObject line;
private List<GameObject> hitGObs;
void Start () {
#if DEBUG //LoadLineRender
line = new GameObject();
line = GameObject.Find ("Line");
line.GetComponent<LineRenderer> ().enabled = false;
#endif //DEBUG0
hitGObs = new List<GameObject>();
hitGObs.Clear ();
}
// Update is called once per frame
void Update () {
//如果写为transform.forward则表示线是无限长
Ray ray=new Ray(transform.position,transform.forward*100); //定义一个射线对象,包含射线发射的位置transform.position，发射距离transform.forward*100；
//drawline in the scene
Debug.DrawLine(transform.position,transform.position+transform.forward*100,Color.red); //这个就是绘制出的射线了，包含发射位置，发射距离和射线的颜色；
RaycastHit hitInfo; //定义一个RaycastHit变量用来保存被撞物体的信息；
//show the headpointer via spotlight
//如果碰撞到了物体，hitInfo里面就包含该物体的相关信息；
if (Physics.Raycast (ray, out hitInfo, 100)) {
DrawLineInGame (hitInfo.point);
GameObject hitme = hitInfo.collider.gameObject;
//hitInfo.point:碰撞点的位置；
//hitInfo.normal:与碰撞点所在平面垂直的向量；
//hitInfo.collider.gameobject:可以得到该物体上的所有信息了；
if (hitme.name != "VideoStream" && hitme.name != "Table" && hitme.name != "HeadPointer")
{
hitme.GetComponent<MeshRenderer> ().material.color = Color.green;
//put the hitting objects into the array:hitGObs，以便使其颜色能回到以前的状态
hitGObs.Add (hitme);
foreach (var item in hitGObs) {
item.GetComponent<MeshRenderer> ().material.color = Color.white;
//item.GetComponent<MeshRenderer> ().material.color = formerObjectsColor;
}
hitGObs.Clear ();
} else {
foreach (var item in hitGObs) {
item.GetComponent<MeshRenderer> ().material.color = Color.white;
//item.GetComponent<MeshRenderer> ().material.color = formerObjectsColor;
}
hitGObs.Clear ();
}
}
else
{
#if DEBUG //LoadLineRender
line.GetComponent<LineRenderer> ().enabled = false;
#endif
ResetOldColor ();
}
}
void DrawLineInGame (Vector3 point)
{
#if DEBUG // LoadLineRender
line.GetComponent<LineRenderer> ().enabled = true;
linerenderer.SetPosition(0, point);
linerenderer.SetPosition(1, point);
linerenderer.startColor = Color.red;
linerenderer.endColor = Color.red;
linerenderer.material = (Material)Resources.Load ("LineRenderColor");
#endif
}
void ResetOldColor()
{
//这一句将决定小球从物体边界到无穷远处时小球是否会停留在物体边缘感觉不自然
//headPointer.GetComponent<MeshRenderer> ().enabled = false;
foreach (var item in hitGObs) {
item.GetComponent<MeshRenderer> ().material.color = Color.white;
//item.GetComponent<MeshRenderer> ().material.color = formerObjectsColor;
}
hitGObs.Clear ();
}
} 
3，Spotlight表示交点
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class SpotLightGaze : MonoBehaviour {
[HideInInspector]
private List<GameObject> hitGObs;
private GameObject headPointer;
[Header("SpotLightShow")]
public GameObject cam;
private GameObject lightSpot;
void Start () {
headPointer = new GameObject();
headPointer = GameObject.Find ("HeadPointer");
if (headPointer) {
headPointer.GetComponent<MeshRenderer> ().enabled = false;
} else {
Debug.LogError ("cannot find object of HeadPointer");
}
hitGObs = new List<GameObject>();
hitGObs.Clear ();
#if DEBUG //spot light show head pointer
lightSpot = new GameObject();
lightSpot = GameObject.Find("Spotlight");
if (!lightSpot) {
Debug.LogError("There is no object of Spotlight");
}else{
lightSpot.GetComponent<Light>().enabled = false;
}
#endif //DEBUG_spotlight
}
// Update is called once per frame
void Update () {
//如果写为transform.forward则表示线是无限长
Ray ray=new Ray(transform.position,transform.forward*100); //定义一个射线对象,包含射线发射的位置transform.position，发射距离transform.forward*100；
//drawline in the scene
Debug.DrawLine(transform.position,transform.position+transform.forward*100,Color.red); //这个就是绘制出的射线了，包含发射位置，发射距离和射线的颜色；
RaycastHit hitInfo; //定义一个RaycastHit变量用来保存被撞物体的信息；
//show the headpointer via spotlight
lightSpot.transform.position = cam.transform.position;
lightSpot.transform.rotation = cam.transform.rotation;
lightSpot.GetComponent<Light>().enabled = true;
//如果碰撞到了物体，hitInfo里面就包含该物体的相关信息；
if (Physics.Raycast (ray, out hitInfo, 100)) {
//DrawLineInGame (hitInfo.point);
GameObject hitme = hitInfo.collider.gameObject;
//hitInfo.point:碰撞点的位置；
//hitInfo.normal:与碰撞点所在平面垂直的向量；
//hitInfo.collider.gameobject:可以得到该物体上的所有信息了；
if (hitme.name != "VideoStream" && hitme.name != "Table" && hitme.name != "HeadPointer") {
//print (hitme.gameObject);
hitme.GetComponent<MeshRenderer> ().material.color = Color.green;
//put the hitting objects into the array:hitGObs，以便使其颜色能回到以前的状态
hitGObs.Add(hitme);
}
} else {
#if DEBUG1 //LoadLineRender
line.GetComponent<LineRenderer> ().enabled = false;
#endif
headPointer.GetComponent<MeshRenderer> ().enabled = false;
foreach (var item in hitGObs) {
item.GetComponent<MeshRenderer> ().material.color = Color.white;
}
}
}
void DrawLineInGame (Vector3 point)
{
//render the position of sphere
headPointer.GetComponent<MeshRenderer> ().enabled = true;
headPointer.transform.position = point;
}
} 
