ManifoldPoint class
A manifold point is a contact point belonging to a contact manifold. It holds the details of the geometry and dynamics of the contact points.
class ManifoldPoint { /** * Usage depends on manifold type. For circles, is the local center of * circleB. For faceA, is the local center of CircleB or the clip point of * polygonB. For faceB, is the clip point of polygonA. */ final Vector localPoint; /** The non-penetration impulse. */ num normalImpulse; /** The friction impulse. */ num tangentImpulse; /** Unique identifier for a contact point between two shapes. */ final ContactID id; /** * Constructs a new ManifoldPoint. */ ManifoldPoint() : localPoint = new Vector(), tangentImpulse = 0, normalImpulse = 0, id = new ContactID() { } /** * Constructs a new ManifoldPoint that is a copy of the given point. */ ManifoldPoint.copy(ManifoldPoint other) : localPoint = new Vector.copy(other.localPoint), normalImpulse = other.normalImpulse, tangentImpulse = other.tangentImpulse, id = new ContactID.copy(other.id) { } /** * Sets this ManifoldPoint to be equal to the given point. */ void setFrom(ManifoldPoint other) { localPoint.setFrom(other.localPoint); normalImpulse = other.normalImpulse; tangentImpulse = other.tangentImpulse; id.setFrom(other.id); } }
Constructors
new ManifoldPoint() #
Constructs a new ManifoldPoint.
ManifoldPoint() : localPoint = new Vector(), tangentImpulse = 0, normalImpulse = 0, id = new ContactID() { }
new ManifoldPoint.copy(ManifoldPoint other) #
Constructs a new ManifoldPoint that is a copy of the given point.
ManifoldPoint.copy(ManifoldPoint other) : localPoint = new Vector.copy(other.localPoint), normalImpulse = other.normalImpulse, tangentImpulse = other.tangentImpulse, id = new ContactID.copy(other.id) { }
Properties
final Vector localPoint #
Usage depends on manifold type. For circles, is the local center of circleB. For faceA, is the local center of CircleB or the clip point of polygonB. For faceB, is the clip point of polygonA.
final Vector localPoint;
num normalImpulse #
The non-penetration impulse.
num normalImpulse;
final Type runtimeType #
A representation of the runtime type of the object.
external Type get runtimeType;
num tangentImpulse #
The friction impulse.
num tangentImpulse;
Operators
bool operator ==(other) #
The equality operator.
The default behavior for all Object
s is to return true if and
only if this
and
other are the same object.
If a subclass overrides the equality operator it should override
the hashCode
method as well to maintain consistency.
bool operator ==(other) => identical(this, other);
Methods
int hashCode() #
Get a hash code for this object.
All objects have hash codes. Hash codes are guaranteed to be the
same for objects that are equal when compared using the equality
operator ==
. Other than that there are no guarantees about
the hash codes. They will not be consistent between runs and
there are no distribution guarantees.
If a subclass overrides hashCode
it should override the
equality operator as well to maintain consistency.
external int hashCode();
new ManifoldPoint() #
Constructs a new ManifoldPoint.
ManifoldPoint() : localPoint = new Vector(), tangentImpulse = 0, normalImpulse = 0, id = new ContactID() { }
new ManifoldPoint.copy(ManifoldPoint other) #
Constructs a new ManifoldPoint that is a copy of the given point.
ManifoldPoint.copy(ManifoldPoint other) : localPoint = new Vector.copy(other.localPoint), normalImpulse = other.normalImpulse, tangentImpulse = other.tangentImpulse, id = new ContactID.copy(other.id) { }
noSuchMethod(String name, List args) #
noSuchMethod
is invoked when users invoke a non-existant method
on an object. The name of the method and the arguments of the
invocation are passed to noSuchMethod
. If noSuchMethod
returns a value, that value becomes the result of the original
invocation.
The default behavior of noSuchMethod
is to throw a
noSuchMethodError
.
external Dynamic noSuchMethod(String name, List args);
const Object() #
Creates a new Object
instance.
Object
instances have no meaningful state, and are only useful
through their identity. An Object
instance is equal to itself
only.
const Object();
void setFrom(ManifoldPoint other) #
Sets this ManifoldPoint to be equal to the given point.
void setFrom(ManifoldPoint other) { localPoint.setFrom(other.localPoint); normalImpulse = other.normalImpulse; tangentImpulse = other.tangentImpulse; id.setFrom(other.id); }
String toString() #
Returns a string representation of this object.
external String toString();