Adds another object's values to this one.
The object to add.
A new object with the result of the addition.
Creates a new object that is a copy of the current instance.
A new instance of the object.
Multiplies the object's values by a scalar.
The number to multiply by.
A new object with the result of the multiplication.
Subtracts another object's values from this one.
The object to subtract.
A new object with the result of the subtraction.
Defines the required mathematical operations for an object to be tweenable.