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module Compass::SassExtensions::Functions::Math
def pi()
Sass::Script::Number.new(Math::PI)
end
Sass::Script::Functions.declare :pi, []
def sin(number)
trig(:sin, number)
end
Sass::Script::Functions.declare :sin, [:number]
def cos(number)
trig(:cos, number)
end
Sass::Script::Functions.declare :cos, [:number]
def tan(number)
trig(:tan, number)
end
Sass::Script::Functions.declare :tan, [:number]
def e()
Sass::Script::Number.new(Math::E)
end
Sass::Script::Functions.declare :pi, []
def logarithm(number, base = e )
assert_type number, :Number
assert_type base, :Number
raise Sass::SyntaxError, "base to logarithm must be unitless." unless base.unitless?
result = Math.log(number.value, base.value) rescue Math.log(number.value) / Math.log(base.value)
Sass::Script::Number.new(result, number.numerator_units, number.denominator_units)
end
Sass::Script::Functions.declare :logarithm, [:number]
Sass::Script::Functions.declare :logarithm, [:number, :base]
def sqrt(number)
numeric_transformation(number) { |n| Math.sqrt(n) }
end
Sass::Script::Functions.declare :sqrt, [:number]
alias square_root sqrt
Sass::Script::Functions.declare :square_root, [:number]
def pow(number, exponent)
assert_type number, :Number
assert_type exponent, :Number
raise Sass::SyntaxError, "exponent to pow must be unitless." unless exponent.unitless?
Sass::Script::Number.new(number.value**exponent.value, number.numerator_units, number.denominator_units)
end
Sass::Script::Functions.declare :pow, [:number, :exponent]
private
def trig(operation, number)
if number.numerator_units == ["deg"] && number.denominator_units == []
Sass::Script::Number.new(Math.send(operation, Math::PI * number.value / 180))
else
Sass::Script::Number.new(Math.send(operation, number.value), number.numerator_units, number.denominator_units)
end
end
end
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