虚幻引擎5文档已被迁移至 Epic开发者社区

开始用UE4开发SteamVR上的VR项目时，首先要考虑的一点便是确定该体验为坐立式还是站立式。以下指南将讲述如何设置坐立式SteamVR 体验的UE4项目VR相机。

步骤

以下内容将讲述如何进行坐立式SteamVR体验的Pawn设置。

1. 首先，打开或新建Pawn蓝图，然后前往 视口（Viewport） 选项卡的 组件（Component） 部分。在此处用以下命名添加以下两个组件，并将VRCamera设为VRCameraRoot的子项：

   组件命名	值
   场景	VRCameraRoot
   相机	VRCamera

   由于VR相机能在不实际移动相机的情况下实现相机位置偏移，因此无论使用何种VR头戴显示器，Epic推荐均此方式设置VR相机。

2. 接下来，打开Pawn蓝图（如未打开），然后在 Event Graph 中从 Event Begin Play 节点连出引线，显示可执行操作（Executable Actions）列表。在列表中搜索 Set Tracking Origin 节点，点击将其添加到事件图表。

   点击查看大图。

3. Set Tracking Origin节点有两个选项：Floor Level和Eye Level。针对坐立式体验，需要将 Set Tracking Origin 节点的 Origin 设为 Eye Level 。

   点击查看大图。

4. 接下来在 我的蓝图 选项卡的 变量（Variables） 部分中新建名为 ViveCameraHeight 的 向量 变量，并将 Z 轴值设为 121 。

   对坐立式SteamVR体验而言，需将相机的高度设为真实世界中用户的坐立高度（以厘米计）。

5. 然后从 Set Tracking Origin 节点的输出连出引线，搜索 Set Relative Location**节点，选择 SetRelativeLocation(VRCameraRoot)** 选项。

   点击查看大图。

6. 将 ViveCameraHeight 变量连接到Set Relative Location节点上的 New Location 输入，然后按下 编译（Compile） 按钮。操作完成后，事件图表应下图类似。

   Copy Node Graph

   BEGIN OBJECT
                   Begin Object Class=/Script/BlueprintGraph.K2Node_Event Name="K2Node_Event_3"
      EventReference=(MemberParent=Class'/Script/Engine.Actor',MemberName="ReceiveBeginPlay")
      bOverrideFunction=True
      bCommentBubblePinned=True
      NodeGuid=71F8712B42D30302CBA9CE84C38862B7
      CustomProperties Pin (PinId=63E599D74E38B8776D6E88A4AAB2C2B3,PinName="OutputDelegate",Direction="EGPD_Output",PinType.PinCategory="delegate",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(MemberParent=Class'/Script/Engine.Actor',MemberName="ReceiveBeginPlay"),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
      CustomProperties Pin (PinId=96D13FDB4718AC06F0F132AEEBA98395,PinName="then",Direction="EGPD_Output",PinType.PinCategory="exec",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,LinkedTo=(K2Node_CallFunction_1 0AF4F2C243DAA259B82A0AB55A91B640,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   End Object
   Begin Object Class=/Script/BlueprintGraph.K2Node_CallFunction Name="K2Node_CallFunction_1"
      FunctionReference=(MemberParent=Class'/Script/HeadMountedDisplay.HeadMountedDisplayFunctionLibrary',MemberName="SetTrackingOrigin")
      NodePosX=224
      NodeGuid=401DF7CA48C88D2786ECB8B5C2AC8F46
      CustomProperties Pin (PinId=0AF4F2C243DAA259B82A0AB55A91B640,PinName="execute",PinToolTip="\nExec",PinType.PinCategory="exec",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,LinkedTo=(K2Node_Event_3 96D13FDB4718AC06F0F132AEEBA98395,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
      CustomProperties Pin (PinId=E9F9736F435EF94B7A4B16A0C9347FFB,PinName="then",PinToolTip="\nExec",Direction="EGPD_Output",PinType.PinCategory="exec",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,LinkedTo=(K2Node_CallFunction_5 DE9FB716426D0575C24DBD90B0B7F9B0,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
      CustomProperties Pin (PinId=E21CFDB440B456D7A54A2B991677B221,PinName="self",PinFriendlyName=NSLOCTEXT("K2Node", "Target", "Target"),PinToolTip="Target\nHead Mounted Display Function Library Object Reference",PinType.PinCategory="object",PinType.PinSubCategory="",PinType.PinSubCategoryObject=Class'/Script/HeadMountedDisplay.HeadMountedDisplayFunctionLibrary',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultObject="/Script/HeadMountedDisplay.Default__HeadMountedDisplayFunctionLibrary",PersistentGuid=00000000000000000000000000000000,bHidden=True,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
      CustomProperties Pin (PinId=D3A2C5724D17455C5C1DCBAA7E724282,PinName="Origin",PinToolTip="Origin\nEHMDTrackingOrigin Enum",PinType.PinCategory="byte",PinType.PinSubCategory="",PinType.PinSubCategoryObject=Enum'/Script/HeadMountedDisplay.EHMDTrackingOrigin',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="Eye",PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   End Object
   Begin Object Class=/Script/BlueprintGraph.K2Node_VariableGet Name="K2Node_VariableGet_0"
      VariableReference=(MemberName="VRCameraRoot",bSelfContext=True)
      NodePosX=720
      NodePosY=48
      NodeGuid=DE98398C46FA741DD0ECCFA88342B5DC
      CustomProperties Pin (PinId=D3E17C4549E0A126BF8A2D97653C64D5,PinName="VRCameraRoot",Direction="EGPD_Output",PinType.PinCategory="object",PinType.PinSubCategory="",PinType.PinSubCategoryObject=Class'/Script/Engine.SceneComponent',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,LinkedTo=(K2Node_CallFunction_5 560BA9474CC7FF8D01863CB899932E82,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
      CustomProperties Pin (PinId=8B50EC6646D9AB54EDFBCAAA7B690B9B,PinName="self",PinFriendlyName=NSLOCTEXT("K2Node", "Target", "Target"),PinType.PinCategory="object",PinType.PinSubCategory="",PinType.PinSubCategoryObject=BlueprintGeneratedClass'/Game/SteamVR_Pawn_Sitting.SteamVR_Pawn_Sitting_C',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PersistentGuid=00000000000000000000000000000000,bHidden=True,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   End Object
   Begin Object Class=/Script/BlueprintGraph.K2Node_CallFunction Name="K2Node_CallFunction_5"
      FunctionReference=(MemberParent=Class'/Script/Engine.SceneComponent',MemberName="K2_SetRelativeLocation")
      NodePosX=896
      NodePosY=-16
      NodeGuid=9C212BB84E9A16ED4D937A898C2B6367
      CustomProperties Pin (PinId=DE9FB716426D0575C24DBD90B0B7F9B0,PinName="execute",PinToolTip="\nExec",PinType.PinCategory="exec",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,LinkedTo=(K2Node_CallFunction_1 E9F9736F435EF94B7A4B16A0C9347FFB,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
      CustomProperties Pin (PinId=E5FB25D74A81ACC9C7E06593A4BC6E98,PinName="then",PinToolTip="\nExec",Direction="EGPD_Output",PinType.PinCategory="exec",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
      CustomProperties Pin (PinId=560BA9474CC7FF8D01863CB899932E82,PinName="self",PinFriendlyName=NSLOCTEXT("K2Node", "Target", "Target"),PinToolTip="Target\nScene Component Object Reference",PinType.PinCategory="object",PinType.PinSubCategory="",PinType.PinSubCategoryObject=Class'/Script/Engine.SceneComponent',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,LinkedTo=(K2Node_VariableGet_0 D3E17C4549E0A126BF8A2D97653C64D5,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
      CustomProperties Pin (PinId=4751BC714842E8CEC1B7A294186125C2,PinName="NewLocation",PinToolTip="New Location\nVector \n\nNew location of the component relative to its parent.",PinType.PinCategory="struct",PinType.PinSubCategory="",PinType.PinSubCategoryObject=ScriptStruct'/Script/CoreUObject.Vector',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="0, 0, 0",AutogeneratedDefaultValue="0, 0, 0",LinkedTo=(K2Node_VariableGet_47 78E971AE41B9BC4AA335A6BCC9E5AE69,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
      CustomProperties Pin (PinId=42E17DA8407F1D6AE61E5AB8CE56D509,PinName="bSweep",PinToolTip="扫描\n布尔\n\n是否扫描到目标位置，沿途触发重叠，如发生碰撞则在目标旁停止。只会对根组件扫描和检查阻挡碰撞，子组件移动时无需扫描。碰撞关闭后便无效果。碰撞关闭后便无效果。",PinType.PinCategory="bool",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="false",AutogeneratedDefaultValue="false",PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
      CustomProperties Pin (PinId=C758BE724ED2C35AF55937B09A2B53F4,PinName="SweepHitResult",PinToolTip="扫描命中结果\n命中结果结构\n\n扫描为true时来自任意影响的命中结果。",Direction="EGPD_Output",PinType.PinCategory="struct",PinType.PinSubCategory="",PinType.PinSubCategoryObject=ScriptStruct'/Script/Engine.HitResult',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
      CustomProperties Pin (PinId=C8D4DFF74546FCDE47077A8F575C2D36,PinName="bTeleport",PinToolTip="瞬移\n布尔\n\n是否瞬移物理状态（如已启用此对象的物理碰撞）。如为true，此对象的物理速度则不会发生改变（因此布偶部件不会受位置变化影响）。如为false，则基于位置变化更新物理速度（影响布偶部件）。如CCD开启且未瞬移，这将影响沿整个扫描体积的对象。",PinType.PinCategory="bool",PinType.PinSubCategory="",PinType.PinSubCategoryObject=None,PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="false",AutogeneratedDefaultValue="false",PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   End Object
   Begin Object Class=/Script/BlueprintGraph.K2Node_VariableGet Name="K2Node_VariableGet_47"
      VariableReference=(MemberName="ViveCameraHeight",MemberGuid=534B2E2F41DF6BFC3DD3ABA221017A9B,bSelfContext=True)
      NodePosX=672
      NodePosY=272
      NodeGuid=EECF89E94031777604797C9F4E162A93
      CustomProperties Pin (PinId=78E971AE41B9BC4AA335A6BCC9E5AE69,PinName="ViveCameraHeight",Direction="EGPD_Output",PinType.PinCategory="struct",PinType.PinSubCategory="",PinType.PinSubCategoryObject=ScriptStruct'/Script/CoreUObject.Vector',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,DefaultValue="0, 0, 0",AutogeneratedDefaultValue="0, 0, 0",LinkedTo=(K2Node_CallFunction_5 4751BC714842E8CEC1B7A294186125C2,),PersistentGuid=00000000000000000000000000000000,bHidden=False,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
      CustomProperties Pin (PinId=9489DF2447B3B0AFE5ED5086A7A47CB8,PinName="self",PinFriendlyName=NSLOCTEXT("K2Node", "Target", "Target"),PinType.PinCategory="object",PinType.PinSubCategory="",PinType.PinSubCategoryObject=BlueprintGeneratedClass'/Game/SteamVR_Pawn_Sitting.SteamVR_Pawn_Sitting_C',PinType.PinSubCategoryMemberReference=(),PinType.PinValueType=(),PinType.ContainerType=None,PinType.bIsMap=False,PinType.bIsSet=False,PinType.bIsArray=False,PinType.bIsReference=False,PinType.bIsConst=False,PinType.bIsWeakPointer=False,PersistentGuid=00000000000000000000000000000000,bHidden=True,bNotConnectable=False,bDefaultValueIsReadOnly=False,bDefaultValueIsIgnored=False,bAdvancedView=False,bOrphanedPin=False,)
   End Object
   Begin Object Class=/Script/UnrealEd.EdGraphNode_Comment Name="EdGraphNode_Comment_2"
      CommentDepth=-2
      NodePosX=608
      NodePosY=-80
      NodeWidth=592
      NodeHeight=448
      NodeComment="偏移VRCameraRoot来移动Vive相机"
      NodeGuid=3C39203E41D17487AD060C9123DA366B
   End Object
   Begin Object Class=/Script/UnrealEd.EdGraphNode_Comment Name="EdGraphNode_Comment_3"
      NodePosX=624
      NodePosY=192
      NodeWidth=512
      NodeHeight=160
      NodeComment="将此项设为使用者的站立高度。"
      NodeGuid=C4F04D894FB9E577FF5AF7A8DB3E8FC3
   End Object
   
   END OBJECT

   点击上图左上角并按下 CRTL + C 即可复制完成的蓝图。复制后前往蓝图事件按下 CTRL + V 进行粘贴。

7. 将Pawn蓝图从内容浏览器拖入关卡，将其放置在关卡中0,0,0的位置。

   点击查看大图。

8. 选中放置在关卡中的Pawn蓝图，然后在 Pawn 设置下的 细节 面板中，将 自动拥有玩家（Auto Possess Player） 从 禁用（Disabled） 设为 玩家0（Player 0） 。

   点击查看大图。

最终结果

最后，前往 主工具栏（Main Toolbar） 将 播放模式（Play Mode） 改为 VR预览（VR Preview） ，然后按下 播放（Play） 按钮。戴上HTC Vive头戴显示器，坐下观察关卡时，将看到与以下视频类似的内容。

UE4项目下载

可使用以下链接下载用于创建此例的UE4项目。

• SteamVR坐立式VR相机范例项目