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Contents
# Implements the zip_curve_tuples method
module Tracksperanto::ZipTuples
# Zip arrays of "value at" tuples into an array of "values at" tuples
# (note the plural).
# The first value of each tuple will be the frame number
# and keyframes which are not present in all arrays will be discarded. For example:
#
# zip_curve_tuples( [[0, 12], [1, 23]], [[1, 12]]) #=> [[1, 23, 12]]
#
# We make use of the fact that setting an offset index in an array fills it with nils up to
# the index inserted
def zip_curve_tuples(*given_curves)
tuples = {}
given_curves.each_with_index do | curve, curve_i |
curve.each do | frame_value_tuple |
frame, value = frame_value_tuple
tuples[frame] ||= Array.new(given_curves.length)
tuples[frame][curve_i] = value
end
end
tuples.delete_if {|k,v| v.include?(nil) } # If any of the positions is nil
tuples.keys.sort.map do | frame_in_order |
[frame_in_order] + tuples[frame_in_order]
end
end
end
Version data entries
5 entries across 5 versions & 1 rubygems