Private lastlast value that was reported to an outside entity.
Adds the given Observer to this Subject's list of Observers, so that the Observer
will be notified of changes in this Subject. An Observer may call Subject.addObserver
during its observe method.
the Observer to add
Adds the Parameter to the list of this Subject's available Parameters.
the Parameter to add
if a Parameter with the same name already exists.
Notifies all Observers that this Subject has changed by calling observe on each Observer.
An Observer may call addObserver or removeObserver during its observe
method.
a SubjectEvent with information relating to the change
Notifies all Observers that the Parameter with the given name has changed by calling observe on each Observer.
the language-independent or English name of the Parameter that has changed
if there is no Parameter with the given name
Protected getReturns whether broadcasting is enabled for this Subject. See setBroadcast.
whether broadcasting is enabled for this Subject
Returns the minimum elasticity among all RigidBodys in the simulation. If there are no RigidBodys, then the last value set or calculated is returned. Elasticity is used when calculating collisions; a value of 1.0 means perfect elasticity where the kinetic energy after collision is the same as before (extremely bouncy), while a value of 0 means no elasticity (no bounce).
elasticity used when calculating collisions, a number from 0 to 1.
Returns the ParameterBoolean with the given name.
the language-independent or English name of the ParameterBoolean
the ParameterBoolean with the given name
if there is no ParameterBoolean with the given name
Returns the ParameterNumber with the given name.
the language-independent or English name of the ParameterNumber
the ParameterNumber with the given name
if there is no ParameterNumber with the given name
Returns the ParameterString with the given name.
the language-independent or English name of the ParameterString
the ParameterString with the given name
if there is no ParameterString with the given name
Notifies this Observer that a change has occurred in the Subject.
contains information about what has changed in the Subject: typically either a one-time GenericEvent, or a change to the value of a Parameter
Removes the Observer from this Subject's list of Observers. An Observer may
call removeObserver during its observe method.
the Observer to detach from list of Observers
Removes the Parameter from the list of this Subject's available Parameters.
the Parameter to remove
Protected setSets whether this Subject will broadcast events, typically used to temporarily disable broadcasting. Intended to be used in situations where a subclass overrides a method that broadcasts an event. This allows the subclass to prevent the superclass broadcasting that event, so that the subclass can broadcast the event when the method is completed.
whether this Subject should broadcast events
the previous value
Sets the elasticity of all RigidBodys in the simulation. If there are no RigidBodys, then stores the value internally. Elasticity is used when calculating collisions; a value of 1.0 means perfect elasticity where the kinetic energy after collision is the same as before (extremely bouncy), while a value of 0 means no elasticity (no bounce).
elasticity used when calculating collisions, a number from 0 to 1.
Returns a minimal string representation of this object, usually giving just identity information like the class name and name of the object.
For an object whose main purpose is to represent another Printable object, it is
recommended to include the result of calling toStringShort on that other object.
For example, calling toStringShort() on a DisplayShape might return something like
this:
DisplayShape{polygon:Polygon{'chain3'}}
a minimal string representation of this object.
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Provides a ParameterNumber for setting the elasticity of all RigidBodys in an RigidBodySim.
ElasticitySetter remembers the last value it had even when there are no RigidBodys. This is useful in situations where an application makes a new configuration of RigidBodys and wants to find the user's desired value for elasticity.
WARNING The elasticity reported here is only accurate if all modifications to elasticity of RigidBodys are done thru this class or via RigidBodySim.setElasticity.
Parameters Created
ELASTICITY, see setElasticity