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Flash CS3 ActionScript 3 Particle System
Now that we have the Flash CS3 particle system snowfall animation working exactly like we want, it´s time to optimize the program code.

More Math.random() Method in Particle System
We have completed the snowfall animation for our Flash CS3 particle system. But the snowflakes seem to be missing from the bottom left corner of the stage. What can we do to adjust our animation? Will the Math.random() method save us?

Event Listeners, Functions and Flash Particles
It is time to make it snow in our Flash CS3 particle system animation. We will create more snowflakes just like the one we have been working on for the last few tutorials.

Alpha and Scale Particle Properties - Flash CS3
Let´s add interest to the animation by varying the size and transparency of the snowflake particle. After all, not all snowflakes are the same size. Also, by varying the transparency of some flakes, it will give the illusion that some of the snowflakes are farther away in the snow scene.

Wind Effect with Flash CS3 Math.random()
In our Flash particle system snow scene, our flake just falls straight down. But, unless there is absolutely no wind, most flakes travel down at a slant. Let´s use some math to add more realism to our snowfall animation.

Flash Animation If and Else Conditional
Now that our snowflake movie clip falls down the stage for our particle system snow scene animation, what happens when it falls below the stage? As we have it programmed now, the flake will just keep falling. We could stop the animation after the flake gets beyond the display area of the stage.

ENTER_FRAME Event Listener
In this Flash CS3 tutorial, we will continue to improve our particle system. We will program a snowflake to fall down the stage by progressively increasing the value of the Y position for this snowflake movie clip and we will do this with a new event listener called the ENTER_FRAME event listener.

ENTER_FRAME Event Listener - 2
In this Flash CS3 tutorial, we will continue to improve our particle system. We will program a snowflake to fall down the stage by progressively increasing the value of the Y position for this snowflake movie clip and we will do this with a new event listener called the ENTER_FRAME event listener.

Generating Random Numbers ActionScript
At this point in our snow scene tutorial, we will generate a random number for the Y position for each snow flake using the Math.random() method. The built-in ActionScript Math class contains methods that perform common math functions such as generating random numbers and rounding numbers.

Generating Random Numbers ActionScript - 2
At this point in our snow scene tutorial, we will generate a random number for the Y position for each snow flake using the Math.random() method. The built-in ActionScript Math class contains methods that perform common math functions such as generating random numbers and rounding numbers.

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