IVRSystem::GetControllerState

bool GetControllerState( vr::TrackedDeviceIndex_t unControllerDeviceIndex, vr::VRControllerState_t *pControllerState )bool GetControllerStateWithPose( TrackingUniverseOrigin eOrigin, vr::TrackedDeviceIndex_t unControllerDeviceIndex, vr::VRControllerState_t *pControllerState, TrackedDevicePose_t *pTrackedDevicePose )

使用当前控制器的状态数据填充结构体：

1.vr::TrackedDeviceIndex_t unControllerDeviceIndex - 获取状态数据控制器的索引号

2.vr::VRControllerState_t *pControllerState - 存储控制器状态数据的结构体

3.TrackingUniverseOrigin eOrigin - 返回姿态数据所在的追踪设备空间的坐标系

4.TrackedDevicePose_t *pTrackedDevicePose - 当最后一个按键事件产生时，控制器的姿态数据会被存储到该结构体中。

使用当前的控制器状态数据填充这些结构体。如果因为某些原因导致控制器索引无效或状态数据不可取，则返回false。GetControllerStateWithPose会依据控制器最近更新的按钮状态，使用pose数据来填充pose的结构体。当用户按下或释放按钮时，如果需要一个精准的控制器pose作为输入到应用程序，则使用该格式。因为这个pose数据总是比当前的pose数据要旧，所以不应该使用它去做渲染。

控制器状态结构体：

/** Identifies what kind of axis is on the controller at index n. Read this type * with pVRSystem->Get( nControllerDeviceIndex, Prop_Axis0Type_Int32 + n );*/enum EVRControllerAxisType{k_eControllerAxis_None = 0,k_eControllerAxis_TrackPad = 1,k_eControllerAxis_Joystick = 2,k_eControllerAxis_Trigger = 3, // Analog trigger data is in the X axis};/** contains information about one axis on the controller */struct VRControllerAxis_t{float x; // Ranges from -1.0 to 1.0 for joysticks and track pads. Ranges from 0.0 to 1.0 for triggers were 0 is fully released.float y; // Ranges from -1.0 to 1.0 for joysticks and track pads. Is always 0.0 for triggers.};/** the number of axes in the controller state */static const uint32_t k_unControllerStateAxisCount = 5;/** Holds all the state of a controller at one moment in time. */struct VRControllerState001_t{// If packet num matches that on your prior call, then the controller state hasn't been changed since // your last call and there is no need to process ituint32_t unPacketNum;// bit flags for each of the buttons. Use ButtonMaskFromId to turn an ID into a maskuint64_t ulButtonPressed;uint64_t ulButtonTouched;// Axis data for the controller's analog inputsVRControllerAxis_t rAxis[ k_unControllerStateAxisCount ];};typedef VRControllerState001_t VRControllerState_t;

https://github.com/ValveSoftware/openvr/wiki/IVRSystem::GetControllerState