Module: RplLang::Words::Trig

Includes:
Types
Included in:
Rpl
Defined in:
lib/rpl/words/trig.rb

Instance Method Summary collapse

Methods included from Types

new_object

Instance Method Details

#populate_dictionary ⇒ Object 



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# File 'lib/rpl/words/trig.rb', line 10

def populate_dictionary
  super

  category = 'Trig on reals and complexes'

  @dictionary.add_word!( %w[𝛑 pi],
                         category,
                         '( … -- 𝛑 ) push 𝛑',
                         proc do
                           @stack << Types.new_object( RplNumeric, BigMath.PI( RplNumeric.precision ) )
                         end )

  @dictionary.add_word!( ['sin'],
                         category,
                         '( n -- m ) compute sinus of n',
                         proc do
                           args = stack_extract( [[RplNumeric]] )

                           @stack << Types.new_object( RplNumeric, BigMath.sin( BigDecimal( args[0].value, RplNumeric.precision ), RplNumeric.precision ) )
                         end )

  @dictionary.add_word!( ['asin'],
                         category,
                         '( n -- m ) compute arg-sinus of n',
                         Types.new_object( RplProgram, '« dup abs 1 ==
  « 𝛑 2 / * »
  « dup sq 1 swap - sqrt / atan »
  ifte »' ) )

  @dictionary.add_word!( ['cos'],
                         category,
                         '( n -- m ) compute cosinus of n',
                         proc do
                           args = stack_extract( [[RplNumeric]] )

                           @stack << Types.new_object( RplNumeric, BigMath.cos( BigDecimal( args[0].value, RplNumeric.precision ), RplNumeric.precision ) )
                         end )
  @dictionary.add_word!( ['acos'],
                         category,
                         '( n -- m ) compute arg-cosinus of n',
                         Types.new_object( RplProgram, '« dup 0 ==
  « drop 𝛑 2 / »
  «
    dup sq 1 swap - sqrt / atan
    dup 0 <
    « 𝛑 + »
    ift
  »
  ifte »' ) )

  @dictionary.add_word!( ['tan'],
                         category,
                         '( n -- m ) compute tangent of n',
                         Types.new_object( RplProgram, '« dup sin swap cos / »' ) )

  @dictionary.add_word!( ['atan'],
                         category,
                         '( n -- m ) compute arc-tangent of n',
                         proc do
                           args = stack_extract( [[RplNumeric]] )

                           @stack << Types.new_object( RplNumeric, BigMath.atan( BigDecimal( args[0].value, RplNumeric.precision ), RplNumeric.precision ) )
                         end )

  @dictionary.add_word!( ['d→r', 'd->r'],
                         category,
                         '( n -- m ) convert degree to radian',
                         Types.new_object( RplProgram, '« 180 / 𝛑 * »' ) )

  @dictionary.add_word!( ['r→d', 'r->d'],
                         category,
                         '( n -- m ) convert radian to degree',
                         Types.new_object( RplProgram, '« 𝛑 180 / / »' ) )
end