Class: Face

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

Overview

Warning, documentation written in mathsspeak

Instance Method Summary collapse

Constructor Details

#initialize(v, axis1, axis2) ⇒ Face

Represents a 2-dimensional tile with sides of unit length in 4-dimensional space V is a vector4 representing the position of the faces base vertex Axis1 and axis2 are the two canonical axis that the face is aligned with



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# File 'lib/face.rb', line 9

def initialize v, axis1, axis2
  @pos = v
  @a_min = min(axis1, axis2)
  @a_max = max(axis1, axis2)
end

Instance Method Details

#max_axis ⇒ Object 



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# File 'lib/face.rb', line 79

def max_axis
  @a_max
end

#min_axis ⇒ Object 



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# File 'lib/face.rb', line 75

def min_axis
  @a_min
end

#pos ⇒ Object

Getters



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# File 'lib/face.rb', line 71

def pos
  @pos
end

#tick(translation_matrix) ⇒ Object

One iteration of the system Position is multiplied by translation_matrix Faces are updated based on algorithm encoded here with switch statements

There are some cases where the face splits in two, so we return either a new face or nil



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# File 'lib/face.rb', line 22

def tick translation_matrix
  ret = nil
  @pos = translation_matrix * @pos
  case @a_min
  when 0
    case @a_max
    when 1
      @a_min = 1
      @a_max = 2
    when 2
      @a_min = 1
      @a_max = 3
    when 3
      @a_min = 0
      @a_max = 1

      ret = Face.new(@pos.clone, 1, 3)
      shunt_pos
    end
  when 1
    case @a_max
    when 2
      @a_min = 2
      @a_max = 3
    when 3
      @a_min = 0
      @a_max = 2

      ret = Face.new(@pos.clone, 2, 3)
      shunt_pos
    end
  when 2
      @a_min = 0
      @a_max = 3

      shunt_pos
  end
  return ret
end