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Contents
class Tracksperanto::NukeGrammarUtils
SECTION_START = /^x(\d+)$/
KEYFRAME = /^([-\d\.]+)$/
# Scan a TCL curve expression into a number of tuples of [frame, value]
def parse_curve(curve_text)
# Replace the closing curly brace with a curly brace with space so that it gets caught by split
atoms, tuples = curve_text.gsub(/\}/m, ' }').split, []
# Nuke saves curves very efficiently. x(keyframe_number) means that an uninterrupted sequence of values will start,
# after which values follow. When the curve is interrupted in some way a new x(keyframe_number) will signifu that we
# skip to that specified keyframe and the curve continues from there, in gap size defined by the last fragment.
# That is, x1 1 x3 2 3 4 will place 2, 3 and 4 at 2-frame increments
last_processed_keyframe = 1
intraframe_gap_size = 1
while atom = atoms.shift
if atom =~ SECTION_START
last_processed_keyframe = $1.to_i
if tuples.any?
last_captured_frame = tuples[-1][0]
intraframe_gap_size = last_processed_keyframe - last_captured_frame
end
elsif atom =~ KEYFRAME
tuples << [last_processed_keyframe, $1.to_f]
last_processed_keyframe += intraframe_gap_size
elsif atom == '}'
return tuples
end
end
tuples
end
end
Version data entries
20 entries across 20 versions & 1 rubygems