WVR_PersistSpatialAnchor

WVR_EXPORT WVR_Result WVR_PersistSpatialAnchor(const WVR_SpatialAnchorPersistInfo * spatialAnchorPersistInfo)

Function is used to build and store a persisted anchor from previous created spatial anchor.

Developers use this API to build and store a persisted anchor on runtime. The persisted anchor is saved with feature points info. around the object and environment, so it exists even the SLAM tracking map is reset and re-create.

Note: Once the persisted spatial anchor list has been changed, the corresponding event (WVR_EventType) will be fired. This API will cause WVR_EventType_PersistedAnchor_Changed event.

Version

API Level 14

Parameters

• spatialAnchorPersistInfo: creation information from previous created spatial anchor and give an unique persistedSpatialAnchorName, refer to WVR_SpatialAnchorPersistInfo

Return Value

• WVR_Success: Build and store a persisted anchor successfully.
• others: WVR_Result mean failure.

How to use

Sample function:

// the anchor is WVR_SpatialAnchor handle, which is created before
WVR_SpatialAnchorPersistInfo persistInfo = {anchor, "uniquePersistedName"};
if (WVR_CacheSpatialAnchor(&persistInfo) == WVR_Success) {
    // persist the anchor successfully
}

// somewhere to listen persisted spatial anchor list change event
void ProcessEvent() {
    WVR_Event_t event;
    while(WVR_PollEventQueue(&event)) {
        switch (event.common.type) {
            case WVR_EventType_PersistedAnchor_Changed: {
                // .....

                break;
            }
        }
    }
}