User Guide

561

When the rotation limit is reached (slightly past the 59,652th rotation), the rotation resets to

+116.47° or -116.48°—not 0.00°. This is because +21,474,836.47° is equal to +116.47°, and -

21,474,836.48° is equal to -116.48° (or +243.12°). To avoid this reset condition, when you use

Lingo to perform continuous rotation, constrain the angles to ±360°.

This property can be tested and set. The default value is 0.

Examples

This behavior causes a sprite to rotate continuously by 2° every time the playhead advances,

limiting the angle to 360°:

property spriteNum

on prepareFrame me

sprite(spriteNum).rotation = integer(sprite(spriteNum).rotation + 2) mod 360

end

The following frame script keeps the playhead looping in the current frame while it rotates a

QuickTime sprite in channel 5 a full 360° in 16° increments. When the sprite has been rotated

360°, the playhead continues to the next frame.

on exitFrame

if sprite(5).rotation < 360 then

sprite(5).rotation = sprite(5).rotation + 16

go the frame

end if

end

This handler accepts a sprite reference as a parameter and rotates a Flash movie sprite 360° in 10°

increments:

on rotateMovie whichSprite

repeat with i = 1 to 36

sprite(whichSprite).rotation = i * 10

updatestage

end repeat

end