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Contents
# Internal representation of a keyframe, that carries info on the frame location in the clip, x y and residual
# Frame numbers start from zero (frame 0 is first frame of the clip).
# Tracksperanto uses Shake coordinates as base. Image is Y-positive, X-positive, absolute
# pixel values up and right (zero is in the lower left corner). Some apps use a different
# coordinate system so translation will take place on import or on export, respectively.
# We also use residual and not correlation (residual is how far the tracker strolls away,
# correlation is how sure the tracker is about what it's doing). Residual is the inverse of
# correlation (with total correlation of one the residual excursion becomes zero).
class Tracksperanto::Keyframe
include Tracksperanto::Casts
include Tracksperanto::BlockInit
# Absolute integer frame where this keyframe is placed, 0 based
attr_accessor :frame
# Absolute float X value of the point, zero is lower left
attr_accessor :abs_x
# Absolute float Y value of the point, zero is lower left
attr_accessor :abs_y
# Absolute float residual (0 is "spot on")
attr_accessor :residual
cast_to_float :abs_x, :abs_y, :residual
cast_to_int :frame
def inspect
[frame, abs_x, abs_y].inspect
end
end
Version data entries
17 entries across 17 versions & 1 rubygems