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Versions: 14
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Contents
module Geometry
class Transformation
class Composition
attr_reader :transformations
def initialize(*args)
raise TypeError unless args.all? {|a| a.is_a? Transformation }
@transformations = *args
end
def +(other)
case other
when Transformation
Composition.new(*transformations, other)
when Composition
Composition.new(*transformations, *other.transformations)
end
end
# @group Accessors
# !@attribute [r] has_rotation?
# @return [Bool] true if the transformation has any rotation components
def has_rotation?
transformations.any? {|t| t.is_a?(Rotation) || t.has_rotation? }
end
# !@attribute [r] size
# @return [Number] the number of composed {Transformation}s
def size
transformations.size
end
# @endgroup
def transform(point)
transformations.reverse.reduce(point) {|point, transformation| transformation.transform(point) }
end
end
end
end
Version data entries
14 entries across 14 versions & 3 rubygems