Class AnchorManagerWSA

Encapsulation of spongy world (raw input) state. Its primary duty is the creation and maintenance of the graph of (spongy) anchors built up over the space traversed by the camera.

Inheritance
Object
AnchorManager
AnchorManagerWSA
Inherited Members
Namespace: Microsoft.MixedReality.WorldLocking.Core
Assembly: cs.temp.dll.dll
Syntax
public class AnchorManagerWSA : AnchorManager, IAnchorManager, IDisposable
Remarks

Anchor and Edge creation algorithm:

Goal: a simple and robust algorithm that guarantees an even distribution of anchors, fully connected by edges between nearest neighbors with a minimum of redundant edges

For simplicity, the algorithm should be stateless between time steps

Rules

  • two parameters define spheres MIN and MAX around current position
  • whenever MIN does not contain any anchors, a new anchor is created
  • when a new anchor is created is is linked by edges to all anchors within MAX
  • the MAX radius is 20cm larger than MIN radius which would require 12 m/s beyond world record sprinting speed to cover in one frame
  • whenever MIN contains more than one anchor, the anchor closest to current position is connected to all others within MIN

Properties

SupportsPersistence

Whether the underlying anchors can be locally persisted and reloaded.

Declaration
public override bool SupportsPersistence { get; }
Property Value
Type Description
Boolean
Overrides

TrackingStartDelayTime

Declaration
protected override float TrackingStartDelayTime { get; }
Property Value
Type Description
Single
Overrides

Methods

CreateAnchor(AnchorId, Transform, Pose)

Declaration
protected override SpongyAnchor CreateAnchor(AnchorId id, Transform parent, Pose initialPose)
Parameters
Type Name Description
AnchorId id
Transform parent
Pose initialPose
Returns
Type Description
SpongyAnchor
Overrides

DestroyAnchor(AnchorId, SpongyAnchor)

Declaration
protected override SpongyAnchor DestroyAnchor(AnchorId id, SpongyAnchor spongyAnchor)
Parameters
Type Name Description
AnchorId id
SpongyAnchor spongyAnchor
Returns
Type Description
SpongyAnchor
Overrides

IsTracking()

Declaration
protected override bool IsTracking()
Returns
Type Description
Boolean
Overrides

LoadAnchors(IPlugin, AnchorId, Transform, List<AnchorManager.SpongyAnchorWithId>)

Load the spongy anchors from persistent storage

Declaration
protected override async Task LoadAnchors(IPlugin plugin, AnchorId firstId, Transform parent, List<AnchorManager.SpongyAnchorWithId> spongyAnchors)
Parameters
Type Name Description
IPlugin plugin
AnchorId firstId
Transform parent
List<AnchorManager.SpongyAnchorWithId> spongyAnchors
Returns
Type Description
Task
Overrides
Remarks

The set of spongy anchors loaded by this routine is defined by the frozen anchors previously loaded into the plugin.

Likewise, when a spongy anchor fails to load, this routine will delete its frozen counterpart from the plugin.

SaveAnchors(List<AnchorManager.SpongyAnchorWithId>)

Declaration
protected override async Task SaveAnchors(List<AnchorManager.SpongyAnchorWithId> spongyAnchors)
Parameters
Type Name Description
List<AnchorManager.SpongyAnchorWithId> spongyAnchors
Returns
Type Description
Task
Overrides

TryCreate(IPlugin, IHeadPoseTracker)

Declaration
public static AnchorManagerWSA TryCreate(IPlugin plugin, IHeadPoseTracker headTracker)
Parameters
Type Name Description
IPlugin plugin
IHeadPoseTracker headTracker
Returns
Type Description
AnchorManagerWSA

Implements