had the same problem some time ago my solution doesn't require heavy maths but is rather course i suppose here we go first i set some variables, they are hard coded boundaries if the draggable object (the map in your example) has not been scaled then these are the boundaries within which it is allowed to move.

in my example the map and mask are centered on stage the width and height of the map would be: 420 (positioned at: top -140, left -140) the width and height of the mask: 140 the width and height of the movie: 140

which leaves me with these boundaries:

Set Variable: "maxRight" = "210" Set Variable: "maxLeft" = "-70" Set Variable: "maxBottom" = "210" Set Variable: "maxTop" = "-70" Set Variable: "startW" = "420"

now i start a loop: this to get the current width of the map: Set Variable: "w" = getProperty("../theMap",_width) next i want to see what the difference is between the original width of the map and the current width and divide that by two to get a number that holds the change in position Set Variable: "shift" = (w - startW) / 2 let me explain suppose the current width is 430 we know the original width was 420 that leaves us with a difference of 10 which means (since the map is scaling from the center) that 5 pixels have been added to the left and right the map will have moved 5 pixels to the left and top these pixels will need to be added to(/subtracted from) the boundaries: the map is allowed to move five pixels further than before

next i set two variables to hold the current x and y positions of the map: Set Variable: "X" = getProperty("../theMap",_x) Set Variable: "Y" = getProperty("../theMap",_y) and here finally i start comparing the x and y positions to the updated boundaries if the map crosses a boundary it is returned to that boundary: If (X < maxLeft - shift) Set Property ("../theMap", X Position) = maxLeft - shift End If If (X > maxRight + shift) Set Property ("../theMap", X Position) = maxRight + shift End If If (Y> maxBottom + shift) Set Property ("../theMap", Y Position) = maxBottom + shift End If If (Y < maxTop - shift) Set Property ("../theMap", Y Position) = maxTop - shift End If that's it, keep this looping and you're OK hope it's all clear. if not, don't hesitate to ask good luck and happy new year to you and the other flashers

matt

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