Class: Tracksperanto::Keyframe
- Inherits:
-
Object
- Object
- Tracksperanto::Keyframe
- Defined in:
- lib/tracksperanto/keyframe.rb
Overview
Internal representation of a keyframe, that carries info on the frame location in the clip, x y and residual.
Franme numbers are zero-based (frame 0 is first frame of the clip). X-coordinate (abs_x) is absolute pixels from lower left corner of the comp to the right Y-coordinate (abs_y) is absolute pixels from lower left corner of the comp up Residual is how far in pixels the tracker strolls away, and is the inverse of correlation (with total correlation of one the residual excursion becomes zero).
Instance Attribute Summary collapse
-
#abs_x ⇒ Object
Float X value of the point, zero is lower left.
-
#abs_y ⇒ Object
Float Y value of the point, zero is lower left.
-
#frame ⇒ Object
Integer frame where this keyframe is placed, 0-based.
-
#residual ⇒ Object
Float residual (0 is “spot on”).
Instance Method Summary collapse
Methods included from Casts
#cast_to_bool, #cast_to_float, #cast_to_int, #cast_to_string, included
Methods included from BlockInit
Instance Attribute Details
#abs_x ⇒ Object
Float X value of the point, zero is lower left
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# File 'lib/tracksperanto/keyframe.rb', line 16 def abs_x @abs_x end |
#abs_y ⇒ Object
Float Y value of the point, zero is lower left
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# File 'lib/tracksperanto/keyframe.rb', line 19 def abs_y @abs_y end |
#frame ⇒ Object
Integer frame where this keyframe is placed, 0-based
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# File 'lib/tracksperanto/keyframe.rb', line 13 def frame @frame end |
#residual ⇒ Object
Float residual (0 is “spot on”)
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# File 'lib/tracksperanto/keyframe.rb', line 22 def residual @residual end |
Instance Method Details
#<=>(another) ⇒ Object
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# File 'lib/tracksperanto/keyframe.rb', line 31 def <=>(another) [frame, abs_x, abs_y, residual] <=> [another.frame, another.abs_x, another.abs_y, another.residual] end |
#inspect ⇒ Object
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# File 'lib/tracksperanto/keyframe.rb', line 27 def inspect '#< %.1fx%.1f @%d ~%.2f) >' % [abs_x, abs_y, frame, residual] end |