1. Epic GamesDeveloper
  3. 设置SteamVR的坐立式相机

设置SteamVR的坐立式相机

设置虚幻引擎相机，打造坐立式SteamVR体验。

设置SteamVR的坐立式相机
How to set up your UE project's VR camera for a seated SteamVR experience

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
    Component Name

    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。

    Create a new Vector variable called ViveCameraHeight and set the Z value to 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。

    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

    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蓝图从内容侧滑菜单拖入关卡，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。

项目下载

下文链接可用于下载示例中的虚幻引擎项目。

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