Class: Vedeu::Canvas

Inherits:
Object
  • Object
show all
Includes:
Singleton
Defined in:
lib/vedeu/geometry/canvas.rb

Overview

The size of the terminal is a limitation. Defining a canvas means we have more space to ‘do stuff’.

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#xn ⇒ Fixnum (readonly) Also known as: right, width

Returns:

  • (Fixnum) 


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# File 'lib/vedeu/geometry/canvas.rb', line 17

def xn
  @xn
end

#yn ⇒ Fixnum (readonly) Also known as: bottom, height

Returns:

  • (Fixnum) 


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# File 'lib/vedeu/geometry/canvas.rb', line 11

def yn
  @yn
end

Class Method Details

.canvas ⇒ Vedeu::Canvas

Returns:



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# File 'lib/vedeu/geometry/canvas.rb', line 22

def self.canvas
  instance
end

Instance Method Details

#c ⇒ Array Also known as: centre

Returns:

  • (Array) 


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# File 'lib/vedeu/geometry/canvas.rb', line 37

def c
  [cy, cx]
end

#configure(yn, xn) ⇒ Vedeu::Canvas

Parameters:

  • yn (Fixnum)
  • xn (Fixnum)

Returns:



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# File 'lib/vedeu/geometry/canvas.rb', line 29

def configure(yn, xn)
  @yn = yn
  @xn = xn

  self
end

#cx ⇒ Fixnum Also known as: centre_x

Returns:

  • (Fixnum) 


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# File 'lib/vedeu/geometry/canvas.rb', line 49

def cx
  (width / 2) + x
end

#cy ⇒ Fixnum Also known as: centre_y

Returns:

  • (Fixnum) 


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# File 'lib/vedeu/geometry/canvas.rb', line 43

def cy
  (height / 2) + y
end

#o ⇒ Fixnum Also known as: origin

Returns:

  • (Fixnum) 


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# File 'lib/vedeu/geometry/canvas.rb', line 55

def o
  1
end

#x ⇒ Fixnum Also known as: left

Returns:

  • (Fixnum) 


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# File 'lib/vedeu/geometry/canvas.rb', line 77

def x
  1
end

#y ⇒ Fixnum Also known as: top

Returns:

  • (Fixnum) 


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# File 'lib/vedeu/geometry/canvas.rb', line 71

def y
  1
end