gesture

Hololens开发笔记之Gesture⼿势识别（Manipulation⼿势控制

物体平移）

Manipulationgesture：保持点击⼿势，在3D世界中绝对运动

当你想要全息图像1：1响应⽤户⼿部移动时，操纵⼿势能被⽤于移动、缩放或旋转全息图像。如此的⼀个⽤处是使得⽤户可以在世界中绘制

图像或作画。使⽤所有的⼿势时，操纵⼿势的初始⽬标应该通过凝视来选中。⼀旦点击⼿势开始，通过⼿部移动的任何对对象的操作都能够

被处理，在⽤户操作全息图像时，从⽽使得⽤户得以⾃由地四处张望。

1、修改，添加Presd，Relead处理函数，⽤于识别物体被点

击和被释放的事件

完整代码如下：

//Copyright(c)htsrerved.

//ENSEintheprojectrootforliceninformation.

c;

usingUnityEngine;

;

{

///

///HandsManagerdeterminesifthehandiscurrentlydetectedornot.

///

publicpartialclassHandsManager:Singleton

{

///

///HandDetectedtracksthehanddetectedstate.

///Returnstrueifthelistoftrackedhandsisnotempty.

///

publicboolHandDetected

{

get{>0;}

}

privateHashSettrackedHands=newHashSet();

publicGameObjectFocudGameObject{get;privatet;}

voidAwake()

{

//识别到来源

Detected+=InteractionManager_SourceDetected;

//来源丢失

Lost+=InteractionManager_SourceLost;

//来源被按下

Presd+=InteractionManager_SourcePresd;

//被释放

Relead+=InteractionManager_SourceRelead;

FocudGameObject=null;

}

privatevoidInteractionManager_SourceDetected(InteractionSourceStatestate)

{

//Checktoethatthesourceisahand.

if(!=)

{

return;

}

();

}

privatevoidInteractionManager_SourceLost(InteractionSourceStatestate)

{

//Checktoethatthesourceisahand.

if(!=)

{

return;

}

if(ns())

{

();

}

FocudGameObject=null;

}

//⼿势释放时，将被关注的物体置空

privatevoidInteractionManager_SourceRelead(InteractionSourceStatestate)

{

FocudGameObject=null;

}

//识别到⼿指按下时，将凝视射线关注的物体置为当前⼿势操作的对象

privatevoidInteractionManager_SourcePresd(InteractionSourceStatestate)

{

if(dObject!=null)

{

FocudGameObject=dObject;

}

}

voidOnDestroy()

{

Detected-=InteractionManager_SourceDetected;

Lost-=InteractionManager_SourceLost;

Relead-=InteractionManager_SourceRelead;

Presd-=InteractionManager_SourcePresd;

}

}

}

2、修改，订阅Manipulationgesture事件

//Copyright(c)htsrerved.

//ENSEintheprojectrootforliceninformation.

usingSystem;

usingUnityEngine;

;

{

///

///GestureManagercreatesagesturerecognizerandsignsupforatapgesture.

///Whenatapgestureisdetected,GestureManagerusGazeManagertofindthegameobject.

///GestureManagerthenndsamessagetothatgameobject.

///

[RequireComponent(typeof(GazeManager))]

publicpartialclassGestureManager:Singleton

{

///

///Keytopressintheeditortolectthecurrentlygazedhologram

///

publicKeyCodeEditorSelectKey=;

///

///Tolectevenwhenahologramisnotbeinggazedat,

///ttheoverridefocudobject.

///Ifitsnull,thenthegazedatobjectwillbelected.

///

publicGameObjectOverrideFocudObject

{

get;t;

}

publicboolIsManipulating{get;privatet;}

publicVector3ManipulationPosition{get;privatet;}

///

///Getsthecurrentlyfocudobject,ornullifnone.

///

publicGameObjectFocudObject

{

get{returnfocudObject;}

}

privateGestureRecognizergestureRecognizer;

privateGameObjectfocudObject;

voidStart()

{

//fortappedevents.

gestureRecognizer=newGestureRecognizer();

ognizableGestures(

|Tap

|lationTranslate);

Event+=GestureRecognizer_TappedEvent;

//订阅Manipulationgesture事件

lationStartedEvent+=GestureRecognizer_ManipulationStartedEvent;

lationUpdatedEvent+=GestureRecognizer_ManipulationUpdatedEvent;

lationCompletedEvent+=GestureRecognizer_ManipulationCompletedEvent;

lationCanceledEvent+=GestureRecognizer_ManipulationCanceledEvent;

//Startlookingforgestures.

apturingGestures();

}

privatevoidGestureRecognizer_ManipulationStartedEvent(InteractionSourceKindsource,Vector3cumulativeDelta,RayheadRay)

{

//当被关注的对象⾮空时，设置初始位置

if(dGameObject!=null)

{

IsManipulating=true;

ManipulationPosition=cumulativeDelta;

ssageUpwards("PerformManipulationStart",cumulativeDelta);

}

}

privatevoidGestureRecognizer_ManipulationUpdatedEvent(InteractionSourceKindsource,Vector3cumulativeDelta,RayheadRay)

{

//当被关注的对象⾮空时，更新新的位置

if(dGameObject!=null)

{

IsManipulating=true;

ManipulationPosition=cumulativeDelta;

ssageUpwards("PerformManipulationUpdate",cumulativeDelta);

}

}

privatevoidGestureRecognizer_ManipulationCompletedEvent(InteractionSourceKindsource,Vector3cumulativeDelta,RayheadRay)

{

IsManipulating=fal;

}

privatevoidGestureRecognizer_ManipulationCanceledEvent(InteractionSourceKindsource,Vector3cumulativeDelta,RayheadRay)

{

IsManipulating=fal;

}

privatevoidOnTap()

{

if(focudObject!=null)

{

ssage("OnTap");

}

}

privatevoidOnDoubleTap()

{

if(focudObject!=null)

{

ssage("OnDoubleTap");

}

}

privatevoidGestureRecognizer_TappedEvent(InteractionSourceKindsource,inttapCount,RayheadRay)

{

if(tapCount==1)

{

OnTap();

}

el

{

OnDoubleTap();

}

}

voidLateUpdate()

{

GameObjectoldFocudObject=focudObject;

if(&&

OverrideFocudObject==null&&

er!=null)

{

//Ifgazehitsahologram,tthefocudobjecttothatgameobject.

//Alsoifthecallerhasnotdecidedtooverridethefocudobject.

focudObject=ject;

}

el

{

//Ifourgazedoesn'thitahologram,tthefocudobjecttonulloroverridefocudobject.

focudObject=OverrideFocudObject;

}

//if(focudObject!=oldFocudObject)

//{

////Ifthecurrentlyfocudobjectdoesn'tmatchtheoldfocudobject,cancelthecurrentgesture.

////topreventapplyinggesturesfromonehologramtoanother.

//Gestures();

//apturingGestures();

//}

}

voidOnDestroy()

{

pturingGestures();

//取消订阅

Event-=GestureRecognizer_TappedEvent;

lationStartedEvent-=GestureRecognizer_ManipulationStartedEvent;

lationUpdatedEvent-=GestureRecognizer_ManipulationUpdatedEvent;

lationCompletedEvent-=GestureRecognizer_ManipulationCompletedEvent;

lationCanceledEvent-=GestureRecognizer_ManipulationCanceledEvent;

}

}

}

3、添加ManipulationTranslate脚本，计算相对位移，然后进⾏更新物体的新的位置。

usingUnityEngine;

tions;

;

publicclassManipulationTranslate:MonoBehaviour{

privateVector3manipulationPreviousPosition;

//Uthisforinitialization

voidStart(){

}

//Updateiscalledonceperframe

voidUpdate(){

}

voidPerformManipulationStart(Vector3position)

{

//设置初始位置

manipulationPreviousPosition=position;

}

voidPerformManipulationUpdate(Vector3position)

{

if(pulating)

{

//计算相对位移，然后更新物体的位置

Vector3moveVector=;

moveVector=position-manipulationPreviousPosition;

manipulationPreviousPosition=position;

on+=2f*moveVector;

}

}

4、运⾏测试

将凝视射线投射到对象上，举起右⼿使⾷指和拇指碰触在⼀起，然后进⾏左右移动，可以看到物体的位置将移动。