public void EntityAddOrUpdate(object sender, ISceneEntity entity, UpdateFlags updateFlags, uint extraFlags)
{
const float TOLERANCE = 0.01f;
const float SIGNIFICANT_MOVEMENT_SQ = 2f * 2f;
bool isNew = false;
#region Entity Creation
if (m_sceneGraph.AddOrUpdate(entity))
{
isNew = true;
// If this is a scene presence, fire the callback for a new presence being added
if (entity is IScenePresence)
{
IScenePresence presence = (IScenePresence)entity;
m_log.Debug("Added scene presence " + presence.Name + " to scene " + this.Name);
EventHandler <PresenceArgs> presenceCallback = OnPresenceAdd;
if (presenceCallback != null)
{
presenceCallback(sender, new PresenceArgs {
Presence = presence
});
}
}
}
#endregion Entity Creation
#region Update Damping
UpdateFlags unchangedFlags = 0;
if (updateFlags.HasFlag(UpdateFlags.Position) && entity.RelativePosition.ApproxEquals(entity.LastRelativePosition, TOLERANCE))
{
unchangedFlags |= UpdateFlags.Position;
}
if (updateFlags.HasFlag(UpdateFlags.Rotation) && entity.RelativeRotation.ApproxEquals(entity.LastRelativeRotation, TOLERANCE))
{
unchangedFlags |= UpdateFlags.Rotation;
}
if (entity is IPhysical)
{
IPhysical physical = (IPhysical)entity;
if (updateFlags.HasFlag(UpdateFlags.Acceleration) && physical.Acceleration == physical.LastAcceleration)
{
unchangedFlags |= UpdateFlags.Acceleration;
}
if (updateFlags.HasFlag(UpdateFlags.AngularVelocity) && physical.AngularVelocity == physical.LastAngularVelocity)
{
unchangedFlags |= UpdateFlags.AngularVelocity;
}
if (updateFlags.HasFlag(UpdateFlags.Velocity) && physical.Velocity == physical.LastVelocity)
{
unchangedFlags |= UpdateFlags.Velocity;
}
}
if (updateFlags != UpdateFlags.FullUpdate)
{
updateFlags &= ~unchangedFlags;
if (updateFlags == 0 && extraFlags == 0)
{
return;
}
}
#endregion Update Damping
// If this is a physical entity and the scale or shape changed, reset any cached mass calculations
if (entity is IPhysical && (updateFlags.HasFlag(UpdateFlags.Scale) || updateFlags.HasFlag(UpdateFlags.Shape)))
{
((IPhysical)entity).ResetMass();
}
// Mark updated entities as modified
if (!isNew)
{
entity.MarkAsModified();
}
#region Callbacks
// Fire the callback for an entity being added or updated
EventHandler <EntityAddOrUpdateArgs> addUpdateCallback = OnEntityAddOrUpdate;
if (addUpdateCallback != null)
{
addUpdateCallback(sender, new EntityAddOrUpdateArgs {
Entity = entity, UpdateFlags = updateFlags, ExtraFlags = extraFlags, IsNew = isNew
});
}
// Check for significant movement
Vector3 scenePosition = entity.ScenePosition;
if (Vector3.DistanceSquared(entity.LastSignificantPosition, scenePosition) > SIGNIFICANT_MOVEMENT_SQ)
{
// Fire the significant movement callback
EventHandler <EntitySignificantMovementArgs> sigMovementCallback = OnEntitySignificantMovement;
if (sigMovementCallback != null)
{
sigMovementCallback(sender, new EntitySignificantMovementArgs {
Entity = entity
});
}
// Update LastSignificantPosition after the callback
entity.LastSignificantPosition = scenePosition;
}
#endregion Callbacks
#region Update ISceneEntity.Last* Properties
if (!unchangedFlags.HasFlag(UpdateFlags.Position))
{
entity.LastRelativePosition = entity.RelativePosition;
}
if (!unchangedFlags.HasFlag(UpdateFlags.Rotation))
{
entity.LastRelativeRotation = entity.RelativeRotation;
}
if (entity is IPhysical)
{
IPhysical physical = (IPhysical)entity;
if (!unchangedFlags.HasFlag(UpdateFlags.Acceleration))
{
physical.LastAcceleration = physical.Acceleration;
}
if (!unchangedFlags.HasFlag(UpdateFlags.AngularVelocity))
{
physical.LastAngularVelocity = physical.AngularVelocity;
}
if (!unchangedFlags.HasFlag(UpdateFlags.Velocity))
{
physical.LastVelocity = physical.Velocity;
}
}
#endregion Update ISceneEntity.Last* Properties
}