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Set the interval between shown vectors. By default, this value is
16 (shows a vector every 16 pixels). This controls the density of
Interval
the displayed vectors, and is applied to both the forward and
backward vectors.
Set the display Scale of the shown vectors. By default, this value
is 1.0 (shows a vector with its original length). This controls the
Display Scale
displayed length of the vectors, and is applied to both the forward
and backward vectors.These values only control the player display.
They have absolutely no influence on processing, since the Show
Vectors tool is an image pass-through of its primary input.
Set the color of displayed vectors. Click the color pot to display
the color pickersee Color Picker on page 154.
Forward/Backward
vectors color pots
To display motion vector overlays on an image with the Show Vectors tool:
1 Drop a Show Vectors tool node onto a composition.
2 Connect the Show Vectors primary image input to the footage node.
3 Connect the Show Vectors Forward Vectors input, and/or the Backward
Vectors input to vector image output(s).
4 Select the Show Vectors tool node. The Player shows forward vectors (if
connected) as 2D vectors on top of the input image.
5 Press the m key (lowercase) to display backward vectors (if connected) as
2D vectors are on top of the input image. Press it again to display both
forward and backward vectors on top of the input image. Pressing it a
third time will only show the input image. Pressing it a fourth time will
start the cycle over.
718 | Chapter 30 Vectors