《Unity虚拟现实技术及其应用》 课件 3 gameobject and comopoents

GameObjectBaseclassforallentitiesinUnityScenes.ObjectGameObjectComponentBaseclassforeverythingattachedtoGameObjects.ObjectComponentBehaviour&MonoBehaviourMonoBehaviouristhebaseclassfromwhicheveryUnityscriptderives.usingUnityEngine;usingSystem.Collections;usingUnityEngine.UI;publicclassExample:MonoBehaviour{}ImportantPropertiesenabled:EnabledBehavioursareUpdated,disabledBehavioursarenot.isActiveAndEnabled:HastheBehaviourhadactiveandenabledcalled?gameObject:Thegameobjectthiscomponentisattachedto.Acomponentisalwaysattachedtoagameobject.tag:Thetagofthisgameobject.transform:TheTransformattachedtothisGameObject.hideFlags: Shouldtheobjectbehidden,savedwiththeSceneormodifiablebytheuser?name:Thenameoftheobject.IfthisclassisalsoattachedtoGameObject,then"name"fieldissettothenameofthatGameObject.hideFlagsenumHideFlags{

DontSave,

HideAndDontSave,

HideInHierarchy,

HideInInspector,

None,

NotEditable,}ImportantMessagesAwake:Awakeiscalledwhenthescriptinstanceisbeingloaded.FixedUpdate:Frame-rateindependent,forphysicscalculations.LateUpdate:iscalledeveryframe,iftheBehaviourisenabled.Start:iscalledontheframewhenascriptisenabledjustbeforeanyoftheUpdatemethodsarecalledthefirsttime.Update:iscalledeveryframe,iftheMonoBehaviourisenabled.ImportantFunctionsGetComponent<>();AddComponent<>();publicComponentAddComponent(Typect);publicComponentAddComponent<T>();publicCoroutineStartCoroutine(IEnumerator);CoroutinesvoidFade(){for(floatf=1f;f>=0;f-=0.1f){Colorc=renderer.material.color;c.a=f;renderer.material.color=c;}}IEnumeratorFade(){for(floatf=1f;f>=0;f-=0.1f){Colorc=renderer.material.color;c.a=f;renderer.material.color=c;yieldreturnnull;}}usingCoroutinesboolProximityCheck(){for(inti=0;i<enemies.Length;i++){if(Vector3.Distance(transform.position,enemies[i].transform.position)<dangerDistance){returntrue;}}returnfalse;}IEnumeratorDoCheck(){for(;;){ProximityCheck;yieldreturnnewWaitForSeconds(.1f);}}StaticMethodspublicstaticObjectInstantiate(Objectoriginal);publicstaticObjectInstantiate(Objectoriginal,Transformparent);publicstaticObjectInstantiate(Objectoriginal,Transformparent,boolinstantiateInWorldSpace);publicstaticObjectInstantiate(Objectoriginal,Vector3position,Quaternionrotation);publicstaticObjectInstantiate(Objectoriginal,Vector3position,Quaternionrotation,Transformparent);publicstaticObjectFindObjectOfType(Type);Instantiate(prefab,newVector3(2.0F,0,0),Quaternion.identity);publicMissilemissile;voidStart(){

MissilemissileCopy=Instantiate<Missile>(missile);

Cameracam=(Camera)FindObjectOfType(typeof(Camera));}GameObjectBaseclassforallentitiesinUnityScenes.ObjectGameObjectPropertiesactiveInHierarchy:DefineswhethertheGameObjectisactiveintheScene.activeSelf: ThelocalactivestateofthisGameObject.(ReadOnly)isStatic:EditoronlyAPIthatspecifiesifagameobjectisstatic.layer:Thelayerthegameobjectisin.scene:ScenethattheGameObjectispartof.tag:Thetagofthisgameobject.transform:TheTransformattachedtothisGameObject.PublicMethodsAddComponent:AddsacomponentclassnamedclassNametothegameobject.GetComponent:ReturnsthecomponentofTypetypeifthegameobjecthasoneattached,nullifitdoesn't.GetComponents:ReturnsallcomponentsofTypetypeintheGameObject.SetActive:Activates/DeactivatestheGameObject,dependingonthegiventrueorfalsevalue.StaticMethodsCreatePrimitive：Createsagameobjectwithaprimitivemeshrendererandappropriatecollider.Find：FindsaGameObjectbynameandreturnsit.FindGameObjectsWithTag：ReturnsalistofactiveGameObjectstaggedtag.ReturnsemptyarrayifnoGameObjectwasfound.FindWithTag：ReturnsoneactiveGameObjecttaggedtag.ReturnsnullifnoGameObjectwasfound.PrimitiveType创建五种类型的基础模型：PrimitiveType.Plane，PrimitiveType.Cube，PrimitiveType.Sphere，PrimitiveType.Capsule，PrimitiveType.CylinderGameObjectCreatePrimitive(PrimitiveTypetype);Unity3DLesson组件与脚本关系组件与脚本组件为场景物体提供了更多功能的实现组件的属性值大体分为两种：赋值类型、引用类型脚本是一种特定类型的组件添加组件加载组件包直接修改参数通过代码对组件进行赋值直接访问通过组件访问脚本脚本模板C:\ProgramFiles(x86)\Unity\Editor\Data\Resources\ScriptTemplates脚本的生命周期Awake()脚本唤醒，只运行一次Start()awake之后,update之前，只运行一次Update()正常更新，用于更新逻辑LateUpdae()推迟更新，此方法在Update()方法执行完后调用OnDestroy()当前脚本销毁时调用利用脚本操作游戏对象以下代码放在voidOnGUI(){/*在这里*/}GameObject.CreatePrimitive();用于创建一个原始的游戏对象，系统默认提供的游戏对象GameObjectobjLight=newGameObject("TheLight");objLight.AddComponent<Light>();通过添加组件的形式创游戏对象AddC