WVR_GetTrackableMarkerState

WVR_EXPORT WVR_Result WVR_GetTrackableMarkerState(WVR_Uuid uuid, WVR_PoseOriginModel originModel, WVR_TrackableMarkerState * state)

Function is used to retrieve WVR_TrackableMarkerState related to the trackable marker with input uuid WVR_Uuid.

Developers use this API to retrieve the trackable marker information.

Version

API Level 13

Parameters

• uuid: the trackable marker with input uuid WVR_Uuid.
• originModel: Only WVR_PoseOriginModel_OriginOnHead and WVR_PoseOriginModel_OriginOnGround are supported, refer to WVR_PoseOriginModel.
• state: the returned data related to the trackable marker with input uuid WVR_Uuid.

Return Value

• WVR_Success: Get the the state of the trackable marker successfully.
• others: WVR_Result mean failure.

How to use

Sample function:

#include <wvr/wvr_marker.h>

if (WVR_StartMarker() == WVR_Success) {
    // start marker observer
    if (WVR_StartMarkerObserver(WVR_MarkerObserverTarget_Aruco) == WVR_Success) {
        // Start Aruco marker observer related resources success

        uint32_t tracker_count = 0;
        if (WVR_EnumerateTrackableMarkers(WVR_MarkerObserverTarget_Aruco, 0, &tracker_count, nullptr) == WVR_Success) {
            LOGI("WVR_EnumerateTrackableMarkers - tracker_count(%d)", tracker_count);
            for (int i = 0; i < tracker_count; i++) {
                LOGI("WVR_EnumerateTrackableMarkers - i(%d) ++", i);
                std::vector<WVR_Uuid> uuids(tracker_count);
                if (WVR_EnumerateTrackableMarkers(WVR_MarkerObserverTarget_Aruco, tracker_count,
                                  &tracker_count, uuids.data()) == WVR_Success) {

                    WVR_TrackableMarkerState state{};
                    if (WVR_GetTrackableMarkerState(uuids[i], WVR_PoseOriginModel_OriginOnGround, &state) == WVR_Success) {
                        // get trackable marker state
                    }
                    WVR_ArucoMarkerData arucoData{};
                    if (WVR_GetArucoMarkerData(uuids[i], &arucoData) == WVR_Success) {
                        // get trackable marker related to Aruco specific data
                    }
                }


        // release Aruco marker observer related resources success
        if (WVR_StopMarkerObserver(WVR_MarkerObserverTarget_Aruco) == WVR_Success) {

        }
    }

    WVR_StopMarker();
} else {
    // start marker failed!
}