Class: OrientationDamper

X3D: 3.3
Component: Followers
Status:
experimental

x3dom.nodeTypes. OrientationDamper

The OrientationDamper animates transitions of orientations. If its value is routed to an orientation field of a Transform node that contains an object, then, whenever the destination field receives an orientation, the OrientationDamper node rotates the object from its current orientation to the newly set orientation. It creates a transition that approaches the newly set orientation asymptotically during a time period of approximately three to four times the value of the field tau depending on the desired accuracy and the value of order. Through this asymptotic approach of the destination orientation, a very smooth transition is created.

HTML Encoding and Default Values

<OrientationDamper destination='0,1,0,0' initialDestination='0,1,0,0' initialValue='0,1,0,0' isActive='false' metadata='X3DMetadataObject' order='3' tau='0.3' tolerance='-1' value='0,1,0,0' ></OrientationDamper>

Inheritance


Constructor

OrientationDamper(ctx)

Constructor for OrientationDamper

Parameters:
Name Type Argument Default Description
ctx Object <optional>
null context object, containing initial settings like namespace

Fields

These are the X3D / X3DOM fields of this node. Values should usually be received / set as strings via DOM functions (i.e., using setAttribute("myFieldName", "myFieldValue") and getAttribute("myFieldName")).
Name Type Default Value Range Inheritance Standard Description
destination SFRotation 0,1,0,0 The target orientation value
initialDestination SFRotation 0,1,0,0 The field initialDestination should be set to the same value than initialValue unless a transition to a certain orientation is to be created right after the scene is loaded or right after the OrientationDamper node is created dynamically.
initialValue SFRotation 0,1,0,0 The field initialValue can be used to set the initial orientation of the object.
isActive SFBool false X3DDamperNode isActive shows if the sensor is active
metadata SFNode X3DMetadataObject X3DDamperNode Field to add metadata information
order SFInt32 3 [0..5] X3DDamperNode The order field specifies the smoothness of the transition.
tau SFTime 3 [0,inf) X3DDamperNode The field tau specifies the time-constant of the internal filters and thus the speed that the output of an X3DDamperNode responds to the input. A value of zero for tau means immediate response and the events received on set_destination are forwarded directly. The field tau specifies how long it takes the output of an internal filter to reach the value of its input by 63% (1 - 1/e). The remainder after that period is reduced by 63% during another period of tau seconds provided that the input of the filter does not change. This behavior can be exposed if order is set to one.
tolerance SFFloat -1 -1 or [0,inf) X3DDamperNode If tolerance is set to its default value -1, the browser implementation is allowed to find a good way for detecting the end of a transition. Browsers that do not have an elaborate algorithm can just use .001 as the tolerance value instead. If a value larger than zero is specified for tolerance, the browser shall calculate the difference between output and input for each internal filter being used and stop the animation only when all filters fall below that limit or are equal to it. If zero is specified for tolerance, a transition should be stopped only if input and output match exactly for all internal filters.
value SFRotation 0,1,0,0 The current orientation value.