Eng:Video () on () (block)

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Video () on ()
Category	Sensing
Type	Reporter
Introduced in	2.0

The Video () on () block is a Sensing block and a Reporter block. It gets values of the video, either motion (on a scale of 1 to 100) or direction (which way the detected motion is going, measured on the same plane as sprite direction), on either the Stage, or the current sprite.

It calculates the values based on "optical flow".

Example Uses

• Moving a sprite by moving

forever
  move (video [motion v] on [this sprite v]) steps
  point in direction (video [direction v] on [this sprite v])

• Popping balloons

if <(video [motion v] on [this sprite v]) > [30]> then
  play sound [pop v]
  hide
end

• Sensing lots of action, by also using loudness

when gf clicked
forever
 if < <(video [motion v] on [Stage v]) > [30]> and <not <(loudness) > [30]>> > then
  say [Turn up the volume!]
 end
 if < <not <(video [motion v] on [Stage v]) > [30]>> and <(loudness) > [30]> > then
  say [Start moving!]
 end
 if <<(video [motion v] on [Stage v]) > [30]> and <(loudness) > [30]>> then
  say [Party!]
 end

See Also

• Turn Video ()
• Set Video Transparency to ()%
• Watch Me Move! (video sensing)