[Unity] 常用技巧收集

Unity 屏幕旋转

void Update () {
 
//处理横向两个方向旋转
 
if(Input.deviceOrientation == DeviceOrientation.LandscapeLeft)
 
{
 
if (Screen.orientation != ScreenOrientation.LandscapeLeft) {
 
Screen.orientation = ScreenOrientation.LandscapeLeft;
 
}
 
}else if(Input.deviceOrientation == DeviceOrientation.LandscapeRight)
 
{
 
if (Screen.orientation != ScreenOrientation.LandscapeRight) {
 
Screen.orientation = ScreenOrientation.LandscapeRight;
 
}
 
}else
 
//处理纵向两个方向的旋转
 
if(Input.deviceOrientation == DeviceOrientation.Portrait)
 
{
 
if (Screen.orientation != ScreenOrientation.Portrait) {
 
Screen.orientation = ScreenOrientation.Portrait;
 
}
 
}else if(Input.deviceOrientation == DeviceOrientation.PortraitUpsideDown)
 
{
 
if (Screen.orientation != ScreenOrientation.PortraitUpsideDown) {
 
Screen.orientation = ScreenOrientation.PortraitUpsideDown;
 
}
 
}
 
}

Unity 镜头拉近效果(带缓冲)

var target : Transform;
 
var distance : float = 3.0;
 
var height : float = 1.0;
 
var damping : float = 5.0;
 
var smoothRotation : boolean = true;
 
var rotationDamping : float = 10.0;
 
var targetLookAtOffset : Vector3;     // allows offsetting of camera lookAt, very useful for low bumper heights
 
var bumperDistanceCheck : float = 2.5;  // length of bumper ray
 
var bumperCameraHeight : float = 1.0;   // adjust camera height while bumping
 
var bumperRayOffset : Vector3;    // allows offset of the bumper ray from target origin
 
function FixedUpdate() {
 
var wantedPosition = target.TransformPoint(0, height, -distance);
 
// check to see if there is anything behind the target
 
var hit : RaycastHit;
 
var back = target.transform.TransformDirection(-1 * Vector3.forward);
 
// cast the bumper ray out from rear and check to see if there is anything behind
 
if (Physics.Raycast(target.TransformPoint(bumperRayOffset), back, hit, bumperDistanceCheck)) {
 
// clamp wanted position to hit position
 
wantedPosition.x = hit.point.x;
 
wantedPosition.z = hit.point.z;
 
wantedPosition.y = Mathf.Lerp(hit.point.y + bumperCameraHeight, wantedPosition.y, Time.deltaTime * damping);
 
}
 
transform.position = Vector3.Lerp(transform.position, wantedPosition, Time.deltaTime * damping);
 
var lookPosition : Vector3 = target.TransformPoint(targetLookAtOffset);
 
if (smoothRotation) {
 
var wantedRotation : Quaternion = Quaternion.LookRotation(lookPosition - transform.position, target.up);
 
transform.rotation = Quaternion.Slerp(transform.rotation, wantedRotation, Time.deltaTime * rotationDamping);
 
} else {
 
transform.rotation = Quaternion.LookRotation(lookPosition - transform.position, target.up);
 
}
 
}

Untiy 动画加速

for (var state : AnimationState in animation)
 
{
 
state.speed = 0.5;
 
}

Unith3D判断物体是否在视角内

public var isRendering:boolean=false;
 
private var lastTime:float=0;
 
private var curtTime:float=0;
 
function Update()
 
{
 
isRendering=curtTime!=lastTime?true:false;
 
lastTime=curtTime;
 
}
 
function OnWillRenderObject()
 
{
 
curtTime=Time.time;
 
}

如何判断Unity3D角色动作播放结束

bool AnimationStillPlaying( string animationName )

　　{

　　return _animation.IsPlaying(animationName) && _animation[animationName].normalizedTime<1.0f;

　　}

　　normalizedTime: 范围0 -- 1,  0是动作开始，1是动作结束

利用Quaternion.LookRotation API 将旋转矩阵转换成四元数

Quaternion.LookRotation

　　private static Quaternion QuaternionLookRotation(Vector3 forward, Vector3 up)

　　{

　　forward.Normalize();

　　Vector3 vector = Vector3.Normalize(forward);

　　Vector3 vector2 = Vector3.Normalize(Vector3.Cross(up, vector));

　　Vector3 vector3 = Vector3.Cross(vector, vector2);

　　var m00 = vector2.x;

　　var m01 = vector2.y;

　　var m02 = vector2.z;

　　var m10 = vector3.x;

　　var m11 = vector3.y;

　　var m12 = vector3.z;

　　var m20 = vector.x;

　　var m21 = vector.y;

　　var m22 = vector.z;

　　float num8 = (m00 + m11) + m22;

　　var quaternion = new Quaternion();

　　if (num8 > 0f)

　　{

　　var num = (float)Math.Sqrt(num8 + 1f);

　　quaternion.w = num * 0.5f;

　　num = 0.5f / num;

　　quaternion.x = (m12 - m21) * num;

　　quaternion.y = (m20 - m02) * num;

　　quaternion.z = (m01 - m10) * num;

　　return quaternion;

　　}

　　if ((m00 >= m11) && (m00 >= m22))

　　{

　　var num7 = (float)Math.Sqrt(((1f + m00) - m11) - m22);

　　var num4 = 0.5f / num7;

　　quaternion.x = 0.5f * num7;

　　quaternion.y = (m01 + m10) * num4;

　　quaternion.z = (m02 + m20) * num4;

　　quaternion.w = (m12 - m21) * num4;

　　return quaternion;

　　}

　　if (m11 > m22)

　　{

　　var num6 = (float)Math.Sqrt(((1f + m11) - m00) - m22);

　　var num3 = 0.5f / num6;

　　quaternion.x = (m10+ m01) * num3;

　　quaternion.y = 0.5f * num6;

　　quaternion.z = (m21 + m12) * num3;

　　quaternion.w = (m20 - m02) * num3;

　　return quaternion;

　　}

　　var num5 = (float)Math.Sqrt(((1f + m22) - m00) - m11);

　　var num2 = 0.5f / num5;

　　quaternion.x = (m20 + m02) * num2;

　　quaternion.y = (m21 + m12) * num2;

　　quaternion.z = 0.5f * num5;

　　quaternion.w = (m01 - m10) * num2;

　　return quaternion;

　　}

Unity3D判断场景是否加载完成

加载场景时要用

　　public static AsyncOperation async;

　　async = Application.LoadLevelAsync(“SelectCarModelScreen”);

　　在加载场景里写

　　if (MainInterfaceGUIScript.async.isDone == false)

　　{

　　//________没 有加载完要做的事情如Logo__________________________

　　}

　　else

　　{

　　//全部加载完成后显示的东东。。

　　}

　　说明一点这种方法消耗性能哦

物体运动到指定位置

int smooth = 2;

　　Quaternion target = Quaternion.Euler(0, 0, 0);//目标

　　// Dampen towards the target rotation

　　transform.rotation = Quaternion.Slerp(transform.rotation, target, Time.deltaTime * smooth);

　　《《《《《《《《《《《《《《鼠标左键地形  物体移动至点击位置》》》》》》》》》》》》》

　　var moveSpeed:int=5;//player移动速度

　　var player:Transform;//定义一个人物的Transform

　　private var endposition : Vector3;

　　function Start()

　　{

　　endposition = player.transform.position;

　　}

　　function Update ()

　　{

　　if(Input.GetButtonUp("LeftMouse")){ //LeftMouse是在inputManager中设置的，左键值为mouse 0

　　PlayerMove();

　　}

　　var targetposition=player.TransformPoint(Vector3(0,48.8,-30));

　　transform.position=targetposition;//相机的目标位置,这两句代码的作用是让人物一直处于相机的视野下

　　if(endposition != player.transform.position){

　　player.position=Vector3.MoveTowards(player.position,endposition,Time.deltaTime*moveSpeed);

　　}

　　}

　　function PlayerMove()

　　{

　　var cursorScreenPosition:Vector3=Input.mousePosition;//鼠标在屏幕上的位置

　　var ray:Ray=Camera.main.ScreenPointToRay(cursorScreenPosition);//在鼠标所在的屏幕位置发出一条射线(暂名该射线为x射线)

　　var hit:RaycastHit;

　　if(Physics.Raycast(ray,hit)){

　　if(hit.collider.gameObject.tag=="Terrain"){//设置地形Tag为Terrain

　　endposition = hit.point;

　　}

　　}

　　}

射线测试+使用手势判断是否触碰了某物体

using unityEngine;

　　using System.Collections;

　　public class Lu : MonoBehaviour

　　{

　　public Camera cam;

　　// We need to actually hit an object

　　RaycastHit hitt = new RaycastHit();

　　// Use this for initialization

　　void Start()

　　{

　　}

　　// Update is called once per frame

　　void Update()

　　{

　　Ray ray = cam.ScreenPointToRay(Input.mousePosition);

　　Physics.Raycast(ray, out hitt, 100);

　　// Debug.DrawLine(cam.transform.position, ray.direction,Color.red);

　　if (null != hitt.transform)

　　{

　　print(hitt.point);//鼠标点击的坐标

　　}

　　}

　　}

　　||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||

　　必须给物体添加碰撞器，比如Box Collider

　　然后在Update中检测手势，此处假设为手指在屏幕上移动

　　主相机的视角（Camera.main）从手指移动处（Input.GetTouch(0).position）发射射线，设置射线发射距离。

　　当射线碰撞到了带有碰撞器的物体，就会存储该物体的信息。

　　[csharp] view plaincopy

　　void  Update(){

　　if(Input.touchCount > 0 && Input.GetTouch(0).phase == TouchPhase.Moved){

　　Ray ray = Camera.main.ScreenPointToRay (Input.GetTouch(0).position);

　　//hit用来存储碰撞物体的信息

　　RaycastHit hit;

　　//ray表示射线，hit存储物体的信息,1000为设定射线发射的距离

　　if(Physics.Raycast (ray, out hit, 1000)){

　　print(hit.transform.name.ToString());

　　}

　　}

　　}

实例来创建对象

//Simple Instantiation of a Prefab at Start

　　var thePrefab : GameObject;

　　function Start () {

　　var instance : GameObject = Instantiate(thePrefab, transform.position, transform.rotation);

　　}

　　建立JAVA，把代码拖入到空GameJect上，然后把Prefab拖入到公共变量上，就可以了

声音播放 坐标转换

var cAudio:AudioClip;
 
function Update(){
 
}
 
function OnMouseDown () {
 
var screenSpace = Camera.main.WorldToScreenPoint(transform.position);
 
var offset = transform.position - Camera.main.ScreenToWorldPoint(Vector3(Input.mousePosition.x,transform.position.y, screenSpace.z));
 
while (Input.GetMouseButton(0)){
 
var curScreenSpace = Vector3(Input.mousePosition.x, transform.position.y, screenSpace.z);
 
var curPosition = Camera.main.ScreenToWorldPoint(curScreenSpace) + offset;
 
if(curPosition!=transform.position){
 
audio.Stop();
 
audio.clip = cAudio;
 
audio.Play();
 
}
 
transform.position = curPosition;
 
yield;
 
}
 
}

射线 (之鼠标点击的坐标)

using UnityEngine;
 
using System.Collections;
 
public class Lu : MonoBehaviour
 
{
 
public Camera cam;
 
// We need to actually hit an object
 
RaycastHit hitt = new RaycastHit();
 
// Use this for initialization
 
void Start()
 
{
 
}
 
// Update is called once per frame
 
void Update()
 
{
 
Ray ray = cam.ScreenPointToRay(Input.mousePosition);
 
Physics.Raycast(ray, out hitt, 100);
 
//    Debug.DrawLine(cam.transform.position, ray.direction,Color.red);
 
if (null != hitt.transform)
 
{
 
print(hitt.point);//鼠标点击的坐标
 
}
 
}
 
}

拖拽物体的脚本

function OnMouseDown () {

　　var screenSpace = Camera.main.WorldToScreenPoint(transform.position);

　　var offset = transform.position - Camera.main.ScreenToWorldPoint(Vector3(Input.mousePosition.x, Input.mousePosition.y, screenSpace.z));

　　while (Input.GetMouseButton(0))

　　{

　　var curScreenSpace = Vector3(Input.mousePosition.x, Input.mousePosition.y, screenSpace.z);

　　var curPosition = Camera.main.ScreenToWorldPoint(curScreenSpace) + offset;

　　transform.position = curPosition;

　　yield;

　　}

　　}

用指定图片替换鼠标指针

//用指定图片替换鼠标指针
 
var mouse:Texture;
 
function Update(){
 
Screen.showCursor=false;//隐藏鼠标指针
 
}
 
function OnGUI{
 
var msPos=Input.mousePosition;//鼠标的位置
 
GUI.DrawTexture(Rect(msPos.x,Screen.height-msPos.y,20,20),mouse);
 
}

Unity 字体描边

private void MakeStroke(Rect position,string txtString,Color txtColor,Color outlineColor,int outlineWidth )

　　{

　　position.y-= outlineWidth;

　　GUI.color=outlineColor;

　　GUI.Label(position, txtString);

　　position.y+=outlineWidth*2;

　　GUI.Label(position, txtString);

　　position.y-=outlineWidth;

　　position.x-=outlineWidth;

　　GUI.Label(position, txtString);

　　position.x+=outlineWidth*2;

　　GUI.Label(position, txtString);

　　position.x-=outlineWidth;

　　GUI.color=txtColor;

　　GUI.Label(position, txtString);

　　}

调用外部的EXE和载入关卡

using unityEngine;

　　using System.Collections;

　　public class openexe: MonoBehaviour {

　　// Use this for initialization

　　void Start () {

　　System.Diagnostics.ProcessStartInfo  Info  =  new  System.Diagnostics.ProcessStartInfo();

　　Info.FileName  =  "C:\Program Files\Autodesk\3dsMax8\3dsmax.exe";

　　System.Diagnostics.Process.Start(Info);

　　}

　　// Update is called once per frame

　　void Update () {

　　}

　　}

　　-----------------载入关卡--------------

　　function OnGUI ()

　　{

　　if (GUI.Button(new Rect(400,400,100,20),"Start"))

　　{

　　Application.LoadLevel(1);

　　}

　　}