Inspiration

A couple of websites that are worth the look. Keep in mind though, most of these sites require Flash 8. This should definitely be a factor to keep in mind when designing our site.

Jen Sheroky click here

Shane Fleming click here

Stoav click here

Adobe Experience click here

3G work...

All work made for first assignment (3G website) can be found here: 3G Technology.

Springs: Elasticity

The physics behind it:

We will take the example of a mass attached to a spring. Let's say that the normal state of the system, that is to say when nothing moves, in other words the equilibrium, happens when the spring has a length l. If you move the mass by dx, making so that the spring has now a length l', the force will then be

-k.dx = -k(l'-l)
k is a specific to each spring, and it is <1
All this to show you what you already know : the more we pull on the spring, the faster it will go. Here, pulling hard means big dx, hence a big force, and a high speed.

But we must not forget about inertia. The mass always tends to go back to equilibrium, but it has a certain speed when it does, so it doesn't just stop there.

The ActionScript code:
This code goes inside the Actions panel of the mass, which has to be a movie clip.

onClipEvent (load) {
// inertia relates to the quantity of energy that
// the spring will carry
// inertia = 1 would mean that the spring doesn't
// loose any energy, and that it will oscillate
// forever
inertia = 0.9 ;

// k relates to the spring, and how "hard" it will be.
// The higher k the faster the mass will come back.
k = 0.1 ;
}

onClipEvent (enterFrame) {

// We calculate the distance to the mouse
x = -this._x + _root._xmouse ;
y = -this._y + _root._ymouse ;

//We calculate the amount by which the mass will to move
xp = xp * inertia + x*k ;
yp = yp * inertia + y*k ;

//We move it
_x += xp ;
_y += yp ;
}


For further information, click here.

Gravitation

Force = mass * g
g is a constant equal to 10 meters per second per second (m/s2)

acceleration = g

speed = g * t + starting_speed
t is the time elapsed since the beginning of the free fall


FLASH
onClipEvent (load) {
gravity = 2 ;

// This sets the _y position of the floor
floor = 500 ;

// Bounce is a number < 1 but close to 1
// The closer to 1, the higher the ball will bounce
bounce = 0.92 ;

// We set the speed of the ball when it is released.
speedx = 0 ;
speedy = 0 ;
}

onClipEvent (enterFrame) {

speedy = speedy + gravity ;

this._x += speedx/5 ;
this._y += speedy/5 ;

// If we are beyond the floor, invert the speed
if (this._y > floor) {
this._y = floor ;
speedy *= -bounce ;
}
}