// 1 - Query for visibility.
// 2 - Determine if visibility state is new.
// 3 - If visible, calculate marker pose.
// 4 - If visible, set marker pose.
// 5 - If visibility state is new, notify event receivers via "OnMarkerFound" or "OnMarkerLost".
// 6 - If visibility state is new, set appropriate active state for marker children.
// 7 - If visible, notify event receivers that the marker's pose has been updated via "OnMarkerTracked".
protected virtual void LateUpdate()
{
if (!Application.isPlaying)
{
return;
}
float[] matrixRawArray = new float[16];
lock (loadLock) {
if (UID == NO_ID || !PluginFunctions.inited)
{
visible = false;
return;
}
Vector3 storedScale = transform.localScale;
transform.localScale = Vector3.one;
// 1 - Query for visibility.
bool nowVisible = PluginFunctions.arwQueryMarkerTransformation(UID, matrixRawArray);
// 2 - Determine if visibility state is new.
bool notify = (nowVisible != visible);
visible = nowVisible;
// 3 - If visible, calculate marker pose.
if (visible)
{
// Scale the position from ARToolKit units (mm) into Unity units (m).
matrixRawArray[12] *= UNITY_TO_ARTOOLKIT;
matrixRawArray[13] *= UNITY_TO_ARTOOLKIT;
matrixRawArray[14] *= UNITY_TO_ARTOOLKIT;
Matrix4x4 matrixRaw = ARUtilityFunctions.MatrixFromFloatArray(matrixRawArray);
// ARToolKit uses right-hand coordinate system where the marker lies in x-y plane with right in direction of +x,
// up in direction of +y, and forward (towards viewer) in direction of +z.
// Need to convert to Unity's left-hand coordinate system where marker lies in x-y plane with right in direction of +x,
// up in direction of +y, and forward (towards viewer) in direction of -z.
transformationMatrix = ARUtilityFunctions.LHMatrixFromRHMatrix(matrixRaw);
// 4 - If visible, set marker pose.
Matrix4x4 pose = ARStaticCamera.Instance.transform.localToWorldMatrix * transformationMatrix;
transform.position = ARUtilityFunctions.PositionFromMatrix(pose);
transform.rotation = ARUtilityFunctions.RotationFromMatrix(pose);
transform.localScale = storedScale;
}
// 5 - If visibility state is new, notify event receivers via "OnMarkerFound" or "OnMarkerLost".
if (notify)
{
if (null != eventReceivers && eventReceivers.Count > 0)
{
if (visible)
{
eventReceivers.ForEach(x => x.OnMarkerFound(this));
}
else
{
eventReceivers.ForEach(x => x.OnMarkerLost(this));
}
}
// 6 - If visibility state is new, set appropriate active state for marker children.
for (int i = 0; i < transform.childCount; ++i)
{
transform.GetChild(i).gameObject.SetActive(visible);
}
}
if (visible)
{
// 7 - If visible, notify event receivers that the marker's pose has been updated via "OnMarkerTracked".
if (null != eventReceivers && eventReceivers.Count > 0)
{
eventReceivers.ForEach(x => x.OnMarkerTracked(this));
}
}
}
}
