Class: Astromapper::Builder::Star

Inherits:
Base
  • Object
show all
Defined in:
lib/astromapper/builder/star.rb

Constant Summary collapse

STAR_CHART =

@@stars = {}

{
  #type => 0)example,        1)temp, 2)lux,    3)mass, 4)radius
  'B0' => ['Becrux',           30000, 16000,     16.0,  5.70],
  'B2' => ['Spica',            22000,  8300,     10.5,  5.10],
  'B5' => ['Achernar',         15000,   750,      5.40, 3.70],
  'B8' => ['Rigel',            12500,   130,      3.50, 2.70],
  'A0' => ['Sirius A',          9500,    63,      2.60, 2.30],
  'A2' => ['Fomalhaut',         9000,    40,      2.20, 2.00],
  'A5' => ['Altair',            8700,    24,      1.90, 1.80],
  'F0' => ['Gamma Virginis',    7400,     9.0,    1.60, 1.50],
  'F2' => ['.',                 7100,     6.3,    1.50, 1.30],
  'F5' => ['Procyon A',         6400,     4.0,    1.35, 1.20],
  'G0' => ['Alpha Centauri A',  5900,     1.45,   1.08, 1.05],
  'G2' => ['The Sun',           5800,     1.00,   1.00, 1.00],
  'G5' => ['Mu Cassiopeiae',    5600,     0.70,   0.95, 0.91],
  'G8' => ['Tau Ceti',          5300,     0.44,   0.85, 0.87],
  'K0' => ['Pollux',            5100,     0.36,   0.83, 0.83],
  'K2' => ['Epsilon Eridani',   4830,     0.28,   0.78, 0.79],
  'K5' => ['Alpha Centauri B',  4370,     0.18,   0.68, 0.74],
  'M0' => ['Gliese 185',        3670,     0.075,  0.47, 0.63],
  'M2' => ['Lalande 21185',     3400,     0.03,   0.33, 0.36],
  'M4' => ['Ross 128',          3200,     0.0005, 0.20, 0.21],
  'M6' => ['Wolf 359',          3000,     0.0002, 0.10, 0.12]
}
INNER_LIMIT = 
{
  'O' => [  16, 13, 10 ],
  'B' => [   10, 6.3, 5.0, 4.0, 3.8, 0.6, 0],
  'A' => [    4,   1, 0.4,   0,   0,   0, 0],
  'F' => [    4,   1, 0.3, 0.1,   0,   0, 0],
  'G' => [  3.1,   1, 0.3, 0.1,   0,   0, 0],
  'K' => [  2.5,   1, 0.3, 0.1,   0,   0, 0],
  'M' => [    2,   1, 0.3, 0.1,   0,   0, 0],
  'D' => [  0 ],
}
BIOZONE = 
{
  'O' => [  [790,1190], [630,950], [500,750] ],
  'B' => [  [500,700], [320,480], [250,375], [200,300], [180,270], [30,45]   ],
  'A' => [  [200,300],   [50,75],   [20,30], [5.0,7.5], [4.0,6.0], [3.1,4.7] ],
  'F' => [  [200,300],   [50,75],   [13,19], [2.5,3.7], [2.0,3.0], [1.6,2.4], [0.5,0.8] ],
  'G' => [  [200,300],   [50,75],   [13,19], [2.5,3.7], [2.0,3.0], [1.6,2.4], [0.5,0.8] ],
  'K' => [  [125,190],   [50,75],   [13,19], [4.0,5.9], [1.0,1.5], [0.5,0.6], [0.2,0.3] ],
  'M' => [  [100,150],   [50,76],   [16,24], [5.0,7.5], [0,0], [0.1,0.2], [0.1,0.1] ],
  'D' => [  [0.03, 0.03] ],
}
SPECTRAL = 
{
  'O' => [9],
  'B' => [0,2,5,8],
  'A' => [0,2,5],
  'F' => [0,2,5],
  'G' => [0,2,5,8],
  'K' => [0,2,5],
  'M' => [0,2,4,6]
}
MASS = 
{
  'O' => [70, 60, 0, 0, 50, 0 ],
  'B' => [50, 40, 35, 30, 20, 10],
  'A' => [30, 16, 10, 6, 4, 3],
  'F' => [15, 13, 8, 2.5, 2.2, 1.9],
  'G' => [12, 10, 6, 2.7, 1.8, 1.1, 0.8],
  'K' => [15, 12, 6, 3, 2.3, 0.9, 0.5],
  'M' => [20, 16, 8, 4, 0.3, 0.2],
  'D' => [0.8,0.8,0.8,0.8,0.8,0.8,]
}
COMPANION_SEPARATION = 
[[0.05]*2, [0.5]*3, [2.0]*2, [10.0]*3, [50.0] * 10].flatten
BODE_RATIO = 
[[0.3] * 4, [0.35] * 3, [0.4] * 4].flatten

Instance Attribute Summary collapse

Attributes inherited from Base

#root_dir

Instance Method Summary collapse

Methods inherited from Base

#config, constitute, #names, #spawn_command, #toss

Constructor Details

#initialize(volume, primary = nil, ternary = 0) ⇒ Star

Returns a new instance of Star.



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# File 'lib/astromapper/builder/star.rb', line 71

def initialize(volume, primary=nil,ternary=0)
  @volume     = volume
  @primary    = primary
  @orbits     = []
  @companions = []
  @world      = nil
      
  @type_dm = 0
  @size_dm = 0
  @has_gg  = false
  
  if primary.nil?
    @orbit   = 0
    @type_dm = (toss(2,0) + @volume.star_dm ).max(12)
    @size_dm = (toss(2,0) + 0 ).max(12)
    @star_type = %w{B B A M M M M M K G F F F}[@type_dm] 
    @star_size = %w{0 1 2 3 4 5 5 5 5 5 5 6 500}[@size_dm].to_i
  else
    separation = (toss(2,0) * COMPANION_SEPARATION[toss(3) + (4 * ternary) - 2]).round(2) # Gurps Space 4e p.105

    @orbit = au_to_orbit(separation) - 1
    @star_type = %w{X B A F F G G K K M M M M}[(toss(2,0) + primary.type_dm).max(12)]
    @star_size = %w{0 1 2 3 4 500 500 5 5 6 500 500 500 500}[(toss(2,0) + primary.size_dm).max(12)].to_i
  end
  @spectral = @star_type + SPECTRAL[@star_type].sample.to_s
  @star_size ||= 500

  @bode_constant = (@star_type=='M' and @star_size==5) ? 0.2 : BODE_RATIO[toss]
    
  if @star_size == 500
    @star_subtype = (true) ? 'B' : @star_type
    @star_type = 'D'
  end

  dm = 0
  dm += 4 if @star_size == 3
  dm += 8 if @star_size < 3
  dm -= 4 if @star_type == 'M'
  dm -= 2 if @star_type == 'K'
  
  # Populate Orbits
  (toss(2,0) + dm).whole.times do |i|
    @orbits << Orbit.new(self,i).populate unless orbit_to_au(i) > outer_limit
    @world = @orbits.last if @orbits.last.is_a?(World)
  end
  @world.gas_giant = (@orbits.map{|o| o.kid}.include?('G')) ? 'G' : '.' unless @world.nil?
  prune!
end

Instance Attribute Details

#biozone ⇒ Object

Returns the value of attribute biozone.



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# File 'lib/astromapper/builder/star.rb', line 4

def biozone
  @biozone
end

#bode_constant ⇒ Object

Returns the value of attribute bode_constant.



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# File 'lib/astromapper/builder/star.rb', line 4

def bode_constant
  @bode_constant
end

#companions ⇒ Object

Returns the value of attribute companions.



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# File 'lib/astromapper/builder/star.rb', line 4

def companions
  @companions
end

#id ⇒ Object

Returns the value of attribute id.



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# File 'lib/astromapper/builder/star.rb', line 4

def id
  @id
end

#mass ⇒ Object

Returns the value of attribute mass.



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# File 'lib/astromapper/builder/star.rb', line 4

def mass
  @mass
end

#orbit ⇒ Object

Returns the value of attribute orbit.



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# File 'lib/astromapper/builder/star.rb', line 4

def orbit
  @orbit
end

#orbits ⇒ Object

Returns the value of attribute orbits.



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# File 'lib/astromapper/builder/star.rb', line 4

def orbits
  @orbits
end

#primary ⇒ Object

Returns the value of attribute primary.



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# File 'lib/astromapper/builder/star.rb', line 4

def primary
  @primary
end

#size_dm ⇒ Object

Returns the value of attribute size_dm.



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# File 'lib/astromapper/builder/star.rb', line 4

def size_dm
  @size_dm
end

#star_size ⇒ Object

Returns the value of attribute star_size.



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# File 'lib/astromapper/builder/star.rb', line 4

def star_size
  @star_size
end

#type_dm ⇒ Object

Returns the value of attribute type_dm.



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# File 'lib/astromapper/builder/star.rb', line 4

def type_dm
  @type_dm
end

#volume ⇒ Object

Returns the value of attribute volume.



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# File 'lib/astromapper/builder/star.rb', line 4

def volume
  @volume
end

#world ⇒ Object

Returns the value of attribute world.



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# File 'lib/astromapper/builder/star.rb', line 4

def world
  @world
end

Instance Method Details

#au_to_orbit(au) ⇒ Object 



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# File 'lib/astromapper/builder/star.rb', line 137

def au_to_orbit(au)
  constant = (@primary.nil?) ? @bode_constant : @primary.bode_constant
  (Math.log(au / constant) / Math.log(2) ).round(2).abs - inner_limit
end

#classification ⇒ Object 



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# File 'lib/astromapper/builder/star.rb', line 171

def classification
  return @star_type + @star_subtype if (@star_type == 'D')
  "#{@spectral}#{@star_size.roman}"
end

#column ⇒ Object 



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# File 'lib/astromapper/builder/star.rb', line 179

def column; @volume.column; end

#crib ⇒ Object 



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# File 'lib/astromapper/builder/star.rb', line 163

def crib
  stars = [classification]
  @companions.each { |s| stars << s.classification }
  "%-17s %-16s" % [stars.join('/'), @orbits.map{|o| o.kid}.join('')]
end

#inner_limit ⇒ Object 



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# File 'lib/astromapper/builder/star.rb', line 187

def inner_limit; limit; end

#kid ⇒ Object 



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# File 'lib/astromapper/builder/star.rb', line 155

def kid; 'C'; end

#limit ⇒ Object 



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# File 'lib/astromapper/builder/star.rb', line 188

def limit
  return 0 if @star_size.nil?
  INNER_LIMIT[@star_type][@star_size % 10]
end

#location ⇒ Object 



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# File 'lib/astromapper/builder/star.rb', line 182

def location; @volume.location; end

#luminosity ⇒ Object 



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# File 'lib/astromapper/builder/star.rb', line 193

def luminosity; STAR_CHART[@spectral][2]; end

#orbit_to_au(o) ⇒ Object 



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# File 'lib/astromapper/builder/star.rb', line 134

def orbit_to_au(o)
  inner_limit + (self.bode_constant * (2 ** o)).round(1)
end

#orbits_to_ascii ⇒ Object 



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# File 'lib/astromapper/builder/star.rb', line 159

def orbits_to_ascii
  return '' if @orbits.empty?
  "\n" + @orbits.map{|o| o.to_ascii}.join("\n") + "\n"
end

#outer_limit ⇒ Object

Gurps Space 4e p. 107



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# File 'lib/astromapper/builder/star.rb', line 158

def outer_limit; 40 * mass; end

#prune! ⇒ Object

Ensure last orbits are not empty.



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# File 'lib/astromapper/builder/star.rb', line 119

def prune! # Ensure last orbits are not empty.
  @orbits.each_index { |x| @orbits[x] = Orbit.new(self,x) if @orbits[x].nil?}
  c = @orbits
  # exit
  tk = false
  @orbits = @orbits.sort{|b,a| a.orbit_number <=> b.orbit_number}.map {|o| tk = true unless (o.kid == '.' or tk); o if tk }.reverse.compact
  # @orbits.each_index { |x| @orbits[x] = Orbit.new(self,x) if @orbits[x].nil?}

  return if @orbits.size < 2
  @orbits.length.times do |i|
    @orbits[i].orbit_number = i
    @orbits[i].au = self.orbit_to_au(i)
  end

end

#radius ⇒ Object

Gurps Space 4e p. 104



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# File 'lib/astromapper/builder/star.rb', line 156

def radius; (155000 * Math.sqrt(luminosity)) ** 2; end

#row ⇒ Object 



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# File 'lib/astromapper/builder/star.rb', line 180

def row; @volume.row; end

#sector ⇒ Object 



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# File 'lib/astromapper/builder/star.rb', line 181

def sector; @volume.sector; end

#size ⇒ Object 



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# File 'lib/astromapper/builder/star.rb', line 185

def size; @star_size; end

#size=(s) ⇒ Object 



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# File 'lib/astromapper/builder/star.rb', line 186

def size=(s); @star_size = s; end

#snow_line ⇒ Object

Gurps Space 4e p. 106



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# File 'lib/astromapper/builder/star.rb', line 157

def snow_line; 4.85 * Math.sqrt(luminosity);       end

#temperature ⇒ Object 



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# File 'lib/astromapper/builder/star.rb', line 194

def temperature; @temperature = STAR_CHART[@spectral][1].around(20) if @temperature.nil?; end

#to_ascii ⇒ Object 



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# File 'lib/astromapper/builder/star.rb', line 168

def to_ascii
  classification
end

#to_s ⇒ Object 



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# File 'lib/astromapper/builder/star.rb', line 154

def to_s; kid; end

#type ⇒ Object 



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# File 'lib/astromapper/builder/star.rb', line 183

def type; @star_type; end

#type=(s) ⇒ Object 



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# File 'lib/astromapper/builder/star.rb', line 184

def type=(s); @star_type = s; end

#world? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/astromapper/builder/star.rb', line 175

def world?
  return @orbits.join('').include?('W')
  return false
end