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Custom Trailing Cursor in Flash MX
Author: Siddharth
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.
| » Level Intermediate |
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Added: : 2006-04-08
Rating: 4.88 Votes: 8
Hits: 901
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College student 19 years old, Interests - Computers, Sports
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