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Custom Trailing Cursor in Flash MX
Author: Siddharth

Page 8
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Explanation

The main parts of the code are the duplication of the original MovieClip and the condition for duplication.

Recall, earlier we had set a function to be performed at a fixed interval. That function set the values for two variables mouseX and mouseY at fixed intervals.

The onClipEvent(enterFrame) event handler checks, at the speed of the Movie's frame rate, whether the current position of the cursor is the same as the values in the mouseX or mouseY variables.

• Since the onClipEvent(enterFrame) event works at an interval smaller than that of setInterval(), differences in values are bound to arise when the cursor moves.
  
  
  • The diffX variable calculates the difference between the current X position of the cursor and the X position of the cursor stored in the variable mouseX.
    
    
  • The diffY variable calculates the difference between the current Y position of the cursor and the previous Y position of the cursor stored in the variable mouseY.

If either diffX or diffY contains a value other than 0 (indicating a difference), it is clear that the cursor has moved.

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» Level Intermediate

Added: : 2006-04-08 Rating: 4.15 Votes: 7 Hits: 897

» Author

College student 19 years old, Interests - Computers, Sports

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