Class: Node

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

Overview

The Node class represents the squares of the grid.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(window, x, y, width, height) ⇒ Node

Creates a node. It is composed of the (x, y) position in the grid and the neighbors (list of nodes).



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# File 'lib/astar_visualizer/node.rb', line 28

def initialize(window, x, y, width, height)
  @@colors ||= {
    green: Gosu::Color.argb(0xff00ff00),
    red: Gosu::Color.argb(0xffff0000),
    grey: Gosu::Color.argb(0xff808080),
    lightcyan: Gosu::Color.argb(0xffe0ffff),
    cyan: Gosu::Color.argb(0xff00ffff),
    white: Gosu::Color.argb(0xffffffff),
    yellow: Gosu::Color.argb(0xffffff00),
  }
  @@window ||= window
  @x = x
  @y = y
  @width = width
  @height = height
  @color = @@colors[:white]
  @neighbors = []
end

Instance Attribute Details

#neighbors ⇒ Object (readonly)

Gets the neighbors (list of nodes).



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# File 'lib/astar_visualizer/node.rb', line 22

def neighbors
  @neighbors
end

#x ⇒ Object (readonly)

Gets the x position in the grid.



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# File 'lib/astar_visualizer/node.rb', line 16

def x
  @x
end

#y ⇒ Object (readonly)

Gets the y position in the grid.



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# File 'lib/astar_visualizer/node.rb', line 19

def y
  @y
end

Instance Method Details

#add_to_neighbors(node) ⇒ Object

Adds a node to the neighbors list.



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# File 'lib/astar_visualizer/node.rb', line 151

def add_to_neighbors(node)
  @neighbors << node
end

#closed! ⇒ Object

Makes a node like in the closed list (lightcyan color).



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# File 'lib/astar_visualizer/node.rb', line 113

def closed!
  @color = @@colors[:lightcyan]
end

#closed? ⇒ Boolean

Returns if the node is in the closed list (lightcyan color).

Returns:

  • (Boolean) 


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# File 'lib/astar_visualizer/node.rb', line 106

def closed?
  @color == @@colors[:lightcyan]
end

#draw ⇒ Object

Draws the square.



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# File 'lib/astar_visualizer/node.rb', line 134

def draw
  @@window.draw_rect(@x * @width, @y * @height, @width, @height, @color)
end

#end! ⇒ Object

Makes a node the end point (red color).



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# File 'lib/astar_visualizer/node.rb', line 71

def end!
  @color = @@colors[:red]
end

#end? ⇒ Boolean

Returns if the node is the end point (red color).

Returns:

  • (Boolean) 


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# File 'lib/astar_visualizer/node.rb', line 64

def end?
  @color == @@colors[:red]
end

#inside?(mouse_x, mouse_y) ⇒ Boolean

Returns if the mouse position is in the square.

Returns:

  • (Boolean) 


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# File 'lib/astar_visualizer/node.rb', line 141

def inside?(mouse_x, mouse_y)
  pos_x = @x * @width
  pos_y = @y * @height
  mouse_x >= pos_x && mouse_x <= pos_x + @width && \
    mouse_y >= pos_y && mouse_y <= pos_y + @height
end

#obstacle! ⇒ Object

Makes a node an obstacle (grey color).



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# File 'lib/astar_visualizer/node.rb', line 85

def obstacle!
  @color = @@colors[:grey]
end

#obstacle? ⇒ Boolean

Returns if the node is an obstacle (grey color).

Returns:

  • (Boolean) 


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# File 'lib/astar_visualizer/node.rb', line 78

def obstacle?
  @color == @@colors[:grey]
end

#open! ⇒ Object

Makes a node like in the open list (cyan color).



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# File 'lib/astar_visualizer/node.rb', line 99

def open!
  @color = @@colors[:cyan]
end

#open? ⇒ Boolean

Returns if the node is in the open list (cyan color).

Returns:

  • (Boolean) 


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# File 'lib/astar_visualizer/node.rb', line 92

def open?
  @color == @@colors[:cyan]
end

#path! ⇒ Object

Makes a node in the found path (yellow color).



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# File 'lib/astar_visualizer/node.rb', line 127

def path!
  @color = @@colors[:yellow]
end

#reset! ⇒ Object

Resets a node (white color).



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# File 'lib/astar_visualizer/node.rb', line 120

def reset!
  @color = @@colors[:white]
end

#start! ⇒ Object

Makes a node the start point (green color).



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# File 'lib/astar_visualizer/node.rb', line 57

def start!
  @color = @@colors[:green]
end

#start? ⇒ Boolean

Returns if the node is the start point (green color).

Returns:

  • (Boolean) 


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# File 'lib/astar_visualizer/node.rb', line 50

def start?
  @color == @@colors[:green]
end