Is create a instance inside another class possible?

I wonder if a function in a class could create another class?

For example, surposing that there is a Point class, and a Vector class, i translate the properties Point.x, Point.y, Point.z in a Point instance with vector.x, vector.y, vector.z. The translate fuction creates a new Point instance instead of change the origin Point instance.

In python, i wrote like this,

class Point:

def __init__(self,x,y,z):

self.x,self.y,self.z = x, y, z

def translate(self,vector):

return Point(self.x+vector.x,self.y+vector.y,+self.z+vector.z)

or create another instance from the class

class Vector:

pass

class Point:

def __init__(self,x,y,z):

self.x,self.y,self.z = x, y, z

def vec(self):

return Vector(self.x,self.y,self.z)

Answer 1

[Yongjian Feng]

Yes, it is doable:

classdef Apoint < handle

    properties (Access=public)
        x
        y
    end
    methods
        function ap = Apoint(x, y)
            ap.x = x;
            ap.y = y;
        end
        function np = translate(obj, x, y)
            np = Apoint(obj.x + x, obj.y + y);
        end
    end
end

Then

>> p = Apoint(10, 10)

p = 

  Apoint with properties:

    x: 10
    y: 10

>> np = p.translate(5, 5)

np = 

  Apoint with properties:

    x: 15
    y: 15

>>