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Tutorials » Actionscripting/Expert

Creating Mouse Trails
Author: Morten Barslund (GotCha) | Website: http://www.hhbk.subnet.dk/GotCha.html |

The Foundation (cont.)

The next step is to add each movie clip to our array, after which we determine a horizontal and vertical position for them. Here, the horizontal position is our starting position plus our counter times the space between each movie clip, while the vertical position is the same as our starting position, because we want to place the movie clips in a horizontal line:

myTrails[i] = _root["trail"+i];
myTrails[i]._x = startX+i*letterSpace;
myTrails[i]._y = startY;

If we have a look at itemMaster, which is used to construct the movie clips, we find that it only contains a single text filed named myChar. Every movie clip also has the same text field, so if we take all the letters and numbers in our message myText and give the text field myChar the matching value in the variable myText, we have converted the variable myText into something we can move around:

myTrails[i].myChar = myText.charAt(i-1);

This expression assigns the variable myChar inside the matching movie clip the matching value. The reason why we take the previous value is that the method String.charAt has a starting value of 0, while the counter i has a starting value of 1. To compensate for this, we simply subtract 1 from i. The final step is to create the two variables xPos and yPos inside each movie clip, which are the horizontal and vertical position of the movie clip:

myTrails[i].xPos = myTrails[i]._x;
myTrails[i].yPos = myTrails[i]._y;

All of this can be found in frame 1, which represents the foundation of our file.

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