Codea - Learn Lua for iOS Game Development - page 289

Recording Video
Codea has built-in functions for recording video. The functions for working with video recording are
simple:
 startRecording : You can start the recording by calling this function. Do not call
this function from within the setup function.
 stopRecording : You can stop recording by calling this function. When we stop
recording, the video is saved to the device's camera roll.
 isRecording : With this function, you can query if something is currently being
recording.
touched function. Each touch point
 id : The unique identifier for the touch
 x : The x position of the touch on the screen
 y : The y position of the touch on the screen
 prevX : The x position from the previous frame of the touch
 prevY : The y position from the previous frame of the touch
 deltaX : The amount the touch has moved on the x-axis
 deltaY : The amount the touch has moved on the y-axis
 state : The state of the touch, which can be BEGAN , MOVING , or ENDED
 tapCount : The number of times the touch point has been tapped
There is a global variable called CurrentTouch that contains the most recent touch on the screen.
Here's an example of its use:
function draw()
background(0)
fill(255)
ellipse(CurrentTouch.x, CurrentTouch.y, 300)
end
This code produces a white circle on the screen that looks like a spotlight and moves with the touch
as you glide the finger across the screen.