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ActionScript: Move faded bars randomly across the X axis?

  • Johan007
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Post December 14th, 2004, 10:05 am

I am new to action script. I am working on some faded vertical bars that I want to randomly appear and move left to right randomly across the X axis. Kind of like a film effect.

So far I have done: (source: http://www.sitepoint.com/print/flash-anthology-3 )

1. Draw a simple bar down the screen
2. Convert it to a movie clip symbol named Scripted_Animation .Position the symbol instance on the stage at (0, 0), and name the instance scripted_animation.
3. With the Actions Panel open and the first frame of the main timeline selected, add the following code:

Code: [ Select ]
var endX = scripted_animation._x + 100;
var endY = scripted_animation._y + 0;
var stepX = (endX - scripted_animation._x) / 10;
var stepY = (endY - scripted_animation._y) / 1;

scripted_animation.onEnterFrame = function ()
{
if (this._x < endX) this._x += stepX;
if (this._y < endY) this._y += stepY;
};
  1. var endX = scripted_animation._x + 100;
  2. var endY = scripted_animation._y + 0;
  3. var stepX = (endX - scripted_animation._x) / 10;
  4. var stepY = (endY - scripted_animation._y) / 1;
  6. scripted_animation.onEnterFrame = function ()
  7. {
  8. if (this._x < endX) this._x += stepX;
  9. if (this._y < endY) this._y += stepY;
  10. };


Now I need to add script for the image to start from a random point on the the X axis and NOT just (0, 0)! any idea?
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  • Anonymous
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Post December 14th, 2004, 10:05 am

  • merz
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Post December 17th, 2004, 11:26 am

Well the code below gives the scripted_animation object a randomized strand X and Y.
Math.random(); returns an int between 0.01 and 1, which would meen that if scripted_animation is located at the cord (0, 0) the new X cord would be between 1 and 100. As for the Y, it will always be 0.
Hope this answers your question, otherwise you msg again and I will do my best to help :wink: helo

Code: [ Select ]
var RandX = (scripted_animation._x + 100)*Math.random();
var RandY = (scripted_animation._y)*Math.random();
scripted_animation._x = RandX;
scripted_animation._y = RandY;
  1. var RandX = (scripted_animation._x + 100)*Math.random();
  2. var RandY = (scripted_animation._y)*Math.random();
  3. scripted_animation._x = RandX;
  4. scripted_animation._y = RandY;
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