Class: Pointer

Inherits:
Object
  • Object
show all
Defined in:
lib/pointer.rb

Overview

This class is responsible for keeping track of it’s location on the code map and moving in a direction every iteration.

Constant Summary collapse

DIRECTIONS = 
[:w, :e, :n, :s]
DIRECTIONS_MAP = 

      
    

  




  
Instance Attribute Summary collapse

  




  
    

      Instance Method Summary
      collapse
    


    
  



  
Constructor Details

  
    

  

  
    #initialize(direction = :e)  ⇒ Pointer 
  

  

  




  

    

Returns a new instance of Pointer.



  





  



  

    
      


11
12
13
14
15

    		
    
      
# File 'lib/pointer.rb', line 11

def initialize(direction = :e)
  @direction = direction
  @x, @y = 0, 0
  @trampoline = false
end

    		
  





  



  

    
Instance Attribute Details

    
      
      
      

  

  
    #direction  ⇒ Object 
  

  

  




  

    

Returns the value of attribute direction.



  





  



  

    
      


4
5
6

    		
    
      
# File 'lib/pointer.rb', line 4

def direction
  @direction
end

    		
  





    
      
      
      

  

  
    #trampoline  ⇒ Object 
  

  

  




  

    

Returns the value of attribute trampoline.



  





  



  

    
      


4
5
6

    		
    
      
# File 'lib/pointer.rb', line 4

def trampoline
  @trampoline
end

    		
  





    
      
      
      

  

  
    #x  ⇒ Object 
  

  

  




  

    

Returns the value of attribute x.



  





  



  

    
      


4
5
6

    		
    
      
# File 'lib/pointer.rb', line 4

def x
  @x
end

    		
  





    
      
      
      

  

  
    #y  ⇒ Object 
  

  

  




  

    

Returns the value of attribute y.



  





  



  

    
      


4
5
6

    		
    
      
# File 'lib/pointer.rb', line 4

def y
  @y
end

    		
  





    
  



  

    
Instance Method Details


    
      

  

  
    #step  ⇒ Object 
  

  

  




  

    
      


17
18
19
20
21
22
23
24
25

    		
    
      
# File 'lib/pointer.rb', line 17

def step
  diff = DIRECTIONS_MAP[@direction]
  multiplier = @trampoline ? 2 : 1
  self.x = x + diff.first * multiplier
  self.y = y + diff.last * multiplier
  self.x = x % 80
  self.y = y % 20
  @trampoline = false
end