Point3D.spvm

# Copyright (c) 2023 Yuki Kimoto
# MIT License

class Point3D extends Point {
  
  # Fields
  has z : ro int;
  
  # Class method
  static method new : Point3D ($x : int = 0, $y : int = 0, $z : int = 0) {
    my $self = new Point3D;
    
    $self->init($x, $y, $z);
    
    return $self;
  }
  
  protected method init : Point3D ($x : int = 0, $y : int = 0, $z : int = 0) {
    $self->SUPER::init($x, $y);
    $self->{z} = $z;
  }
  
  method clear : void () {
    $self->SUPER::clear;
    $self->{z} = 0;
  }
  
  method clone : Point3D () {
    my $self_clone = Point3D->new($self->x, $self->y, $self->z);
    
    return $self_clone;
  }
  
  method to_string : string () {
    my $x = $self->x;
    my $y = $self->y;
    my $z = $self->z;
    
    my $string = "($x,$y,$z)";
    
    return $string;
  }
}