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 Tutorials » Actionscripting/Expert
Actions IV - Frame 2 - Explanation of Actions Duplicate Movie Clip ("/box", "box"&d, d)
Set Property ("box"&d, X Position) = origx + d*sizex
GetProperty("box"&d, _x) > squares*sizex + origx - 5
Set Property ("box"&d, Y Position) = origy + sizey
Set Property ("box"&d, X Position) = origx
If (n < squares)
Set Property ("box"&d, X Position) = origx + n*sizex
Set Variable: "n" = n+1
Else If (ntwo < squares)
Set Property ("box"&d, Y Position) = origy+2*sizey
Set Property ("box"&d, X Position) = origx + ntwo*sizex
Set Variable: "ntwo" = ntwo+1
Else If (nthree < squares)
Set Property ("box"&d, Y Position) = origy+3*sizey
Set Property ("box"&d, X Position) = origx + nthree*sizex
Set Variable: "nthree" = nthree+1
Else If (nfour < squares)
Set Property ("box"&d, Y Position) = origy+4*sizey
Set Property ("box"&d, X Position) = origx + nfour*sizex
Set Variable: "nfour" = nfour+1
End If
End If
Set Variable: "d" = d+1
If (d = 46)
Go to and Stop ("stopboxes")
End If
Above are the actions for this frame. Essentially, this frame is played over and over again until "d" is equal to 46. Everytime this frame is played, "d" is increased by 1. It is the "Goto and Play (_currentframe - 1)" command in Frame 3 of this layer that repeatedly returns the movie to this frame, thus increasing "d" by 1 each time. The first If statement tracks the position of the newly duplicated "box"&d instances. Written out you have "If (GetProperty("box"&d, _x)> squares*sizex + origx - 5" where "squares" is equal to the number of boxes you want across the screen and by subtracting 5 you don't create an extra box. As soon as the x position of the new instance is greater than the x position where you would prefer to have a new line start then the new instance is placed on the next line to continue covering the screen with boxes in an orderly fashion. The Set Property commands below the first If statement places the new "/box"&d instances on a new line. It places the new instance back to "origx" and the new y position becomes "origy" plus "sizey", or directly underneath the initial "box" instance. The remaining If statements control the placement of the boxes on the screen. Where we find "n" being used, the new box instances are placed one next to another across the screen, as long as "n" is less than the number of "squares" you want across the screen. As soon as "n" becomes greater, the "else if" statements begin. "ntwo", "nthree", "nfour" are variations on "n". And so it continues until 46 box instances have been created ("d" = 46). The number 46 derives from what the example needs to cover the space. With 9 boxes across and 5 lines high, as soon as "d" equals 46, the program is instructed to go to the frame labeled "stopboxes" where there is a "stop" command.
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Appearing and Disappearing Solar Boxes
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