MassData class
This holds the mass data computed for a shape.
class MassData { /** The mass of the shape, usually in kilograms. */ num mass; /** The position of the shape's centroid relative to the shape's origin. */ Vector center; /** The rotational inertia of the shape about the local origin. */ num inertia; /** * Constructs a blank mass data. */ MassData() : mass = 0, inertia = 0, center = new Vector() { } /** * Copies from the given mass data. */ MassData.copy(MassData md) : mass = md.mass, inertia = md.inertia, center = new Vector.copy(md.center) { } /** * Sets this mass data equal to the given mass data. */ void setFrom(MassData md) { mass = md.mass; inertia = md.inertia; center.setFrom(md.center); } }
Constructors
new MassData() #
Constructs a blank mass data.
MassData() : mass = 0, inertia = 0, center = new Vector() { }
Properties
num inertia #
The rotational inertia of the shape about the local origin.
num inertia;
num mass #
The mass of the shape, usually in kilograms.
num mass;
final Type runtimeType #
A representation of the runtime type of the object.
external Type get runtimeType;
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 MassData() #
Constructs a blank mass data.
MassData() : mass = 0, inertia = 0, center = new Vector() { }
new MassData.copy(MassData md) #
Copies from the given mass data.
MassData.copy(MassData md) : mass = md.mass, inertia = md.inertia, center = new Vector.copy(md.center) { }
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(MassData md) #
Sets this mass data equal to the given mass data.
void setFrom(MassData md) { mass = md.mass; inertia = md.inertia; center.setFrom(md.center); }
String toString() #
Returns a string representation of this object.
external String toString();