Point class in dart, its properties and methods :
Dart math library, dart:math provides different mathematical functions and constants. One of its utility class is the Point class. This class is useful to represent two dimensional positions. It provides a couple of different functions and properties used in two dimensional plan coordinate calculations.
In this post, I will show you how to use this class and its utility functions and properties.
How to use this class :
This class is in the dart:math library. So, we need to import this library to use it :
import 'dart:math';
Constructor of this class :
This class is used to represent one coordinate point on a two dimensional plan. It has one constructor that takes the x and y values for that point :
Point(T x, T y)
Where, T must extend num.
Properties of this class :
Two main properties of this class are magnitude and hashCode.
hashCode returns the hash code of this object. This is a integer value.
magnitude returns the distance between (0,0) and this point. It is also called Euclidean distance.
Methods of this class :
It provides the following methods :
distanceTo(Point p2)-> double :
Returns the distance of the current Point and the point p2.
squaredDistanceTo(Point p2)-> T :
It returns the squared distance of the current point and the other point p2.
toString() -> string :
This method returns the string representation of this Point object.
Example :
Let’s consider the below example :
main(List<string> args) {
var point1 = Point(10,10);
var point2 = Point(20,20);
print("magnitude of point1 : ${point1.magnitude}");
print("Distance between point1 and point2 : ${point1.distanceTo(point2)}");
print("Squared Distance between point1 and point2 : ${point1.squaredDistanceTo(point2)}");
}It will print :
magnitude of point1 : 14.142135623730951
Distance between point1 and point2 : 14.142135623730951
Squared Distance between point1 and point2 : 200
