WTInstantTrackerDelegate Protocol Reference
| Declared in | WTInstantTracker.h |
|---|
Overview
@Brief WTInstantTrackerDelegate provides methods that propagate information about tracker state changes.
Tracker objects are not created by calling there init method, but through the provided factory methods of WTTrackerManager.
Matrix pointer that are provided inside the WTInstantTarget objects are only valid in the current method scope. If they are needed at a later point in time, they have to be copied into different memory that is controlled by the Wikitude Native SDK hosting application.
– instantTracker:didChangeState:
required method
@Brief Called whenever a tracker changes its state internally as a result of calling setActiveInstantTrackingState: on it.
- (void)instantTracker:(nonnull WTInstantTracker *)instantTracker didChangeState:(WTInstantTrackingState)newStateParameters
instantTracker |
The tracker object whose state changed |
|---|---|
newState |
The new state of the tracker |
Declared In
WTInstantTracker.h
– instantTracker:didChangeInitializationPose:
required method
Called whenever an initialization update is being sent by the instant tracker. The tracking data can be used to draw gravity a aligned plane or other augmentations while the tracker is in the initialization state.
- (void)instantTracker:(nonnull WTInstantTracker *)instantTracker didChangeInitializationPose:(nonnull WTInitializationPose *)poseParameters
instantTracker |
The tracker object that sent the initialization update. |
|---|---|
pose |
Information about the gravity aligned plane |
Declared In
WTInstantTracker.h
– instantTrackerDidStartTracking:
required method
@Brief Called whenever a tracker starts tracking the scene for the first time or after it was lost.
- (void)instantTrackerDidStartTracking:(nonnull WTInstantTracker *)instantTrackerParameters
instantTracker |
The tracker object that recognized the scene |
|---|
Declared In
WTInstantTracker.h
– instantTracker:didTrack:
required method
Called whenever the current scene is being tracked again.
- (void)instantTracker:(nonnull WTInstantTracker *)instantTracker didTrack:(nonnull WTInstantTarget *)targetParameters
instantTracker |
The tracker object that tracked scene |
|---|---|
target |
Information about the scene being tracked |
Declared In
WTInstantTracker.h
– instantTrackerDidStopTracking:
required method
Called whenever the current scene is lost
- (void)instantTrackerDidStopTracking:(nonnull WTInstantTracker *)instantTrackerParameters
instantTracker |
The tracker object that lost the scene. |
|---|
Discussion
All WTInstantTarget matrix pointer are set to nullptr and should not be used.
Declared In
WTInstantTracker.h