The 2DIY script archive

Creating a gravity effect

This code allows elements on the screen to be pulled towards the ground, and bounce several times as gravity works on them.

Within a platform activity if you right click on the "test activity" (green triangle) you can add the following code;

 

var gravity:Number = 2;

var velocity:Number = 0;

These are two defined variables - gravity and velocity. Gravity is a constant downward acceleration, set to 2. Velocity is the current vertical speed of the object in question. 

Now select an element. Right click on it then click on the green rotation arrow below the image to view the animation options that are attached to the apple. Click on the red fish (for animation settings) and click on the "adv" option. in the script box that appears, enter the following code;

if ( this._y >= 453 and _root.velocity < 2.5 and _root.velocity >= 0 ) { this._y = 460; _root.velocity =0; }

else {

if ( this._y >= 460 and  _root.velocity>0 ) { _root.velocity = -_root.velocity * .7 ; }

this._y += _root.velocity; 

_root.velocity += _root.gravity;

}

Here is an explanation of how this works from Dan at 2Simple;

Look at the last 2 lines first. Every moment, unless the object is near the floor, (1) that object should move up or down by its current velocity, and (2) its velocity should be changed by the gravity value.

Look at the 3rd last line: If the object has reached the floor and is still heading downward, make it "bounce" - change its velocity be the negative of what it currently is, multiplied by a damping factor so it loses height each time it bounces.

Look at the first line: If the object is close to the floor and is heading downward *slowly*, make it come to rest on the floor.

View example; Download Gravity

Respond to Key Presses

This code allows objects (monsters / collectables / animations) to be moved manually around the screen during an activity. It works well when used with a 2-player activity. Select an element. Right click on it then click on the green rotation arrow below the image to view the animation options that are attached to the apple. Click on the red fish (for animation settings) and click on the "adv" option. in the script box that appears, enter the following code;

if(Key.isDown(65)==true) { this._x +=1; }

the codes for all keys are: A (65) - Z (90) / 0 (48) - 9 (57) / left (37) / up (38) / right (39) / down (40) / space (32) / enter (13) You can use multiple lines to create multi-directional movement.

View example; Download Move_object_with_keys

Finding your position on a 2DIY screen

Download this handy screen position guide to help work out the location of elements within your activities;

Create a repelling object

In a journey activity, you can make a vehicle bounce off an object when it collides.

Within a journey activity select a "monster" and create an image. Right click on it then click on the green rotation arrow below the image to view the animation options that are attached to the monster. Click on the third option (what to do during a collision) and click on the "advanced" option. In the script box that appears, enter the following code;

_root.car._rotation+=30;

When your vehicle reaches the image it will cause the vehicle to bounce off in another direction

View an example; Download Repel

Cause an Oil Slick

In a journey activity, you can make a vehicle act as if it had driven onto an oil slick on the road.

Within a journey activity select a "monster" and create an oil slick image. Right click on it then click on the green rotation arrow below the image to view the animation options that are attached to the monster. Click on the third option (what to do during a collision) and click on the "advanced" option. In the script box that appears, enter the following code;

_root.car._rotation+=Math.random()*30-15;

When your vehicle passes over the slick it will cause a collision and create a fun effect

View example; Download Oil_slick