FrontEnd

import flash.events.MouseEvent;

import flash.events.Event;

import flash.sensors.Accelerometer;

import flash.geom.Point;

import flash.display.Sprite;

btn.buttonMode = true;

btn.addEventListener( MouseEvent.CLICK, onClick );

var time:Number = 3;

var point1:Point;

var point2:Point;

var line:Sprite = new Sprite();

addChild( line );

function onClick( $e:MouseEvent ):void

{

btn.alpha = 0.2;

btn.removeEventListener( MouseEvent.CLICK, onClick );

b.x = p1.x;

b.y = p1.y;

a1.x = p1.x;

a1.y = p1.y;

a2.x = p2.x;

a2.y = p2.y;

point1 = vXY( new Point( p1.x, p1.y ), new Point( p2.x, p2.y ), time );

point2 = vXY( new Point( p2.x, p2.y ), new Point( p3.x, p3.y ), time );

addEventListener( Event.ENTER_FRAME, onEnter );

setTimeout( onEnterStop, time * 1000 );

}

var dx:Number = 0;

var dy:Number = 0;

var dist:Number = 0;

var angle:Number = 0;

var speed:Number = 0;

var vx:Number = 0;

var vy:Number = 0;

var a:Number = 0;

var gravity:Number = 0;

function onEnter( $e:Event ):void

{

gravity += 0.1;

a1.x += point1.x;

a1.y += point1.y;

a2.x += point2.x;

a2.y += point2.y;

dx = a2.x - a1.x;

dy = a2.y - a1.y;

dist = Math.sqrt( dx * dx + dy * dy );

angle = Math.atan2( dy, dx );

speed = dist / 30 / time;

vx = Math.cos( angle ) * speed;

vy = Math.sin( angle ) * speed;

b.rotation = vy * 20;

b.x += vx;

b.y += vy;

a += vx;

line.graphics.clear();

line.graphics.lineStyle( 1, 0xffffff, 0.5 );

line.graphics.moveTo( a2.x, a2.y );

line.graphics.lineTo( a1.x, a1.y );

}

function onEnterStop():void

{

removeEventListener( Event.ENTER_FRAME, onEnter );

btn.addEventListener( MouseEvent.CLICK, onClick );

btn.alpha = 1;

}

function vXY( $point1:Point, $point2:Point, $time:int ):Point

{

var dx:Number = $point2.x - $point1.x;

var dy:Number = $point2.y - $point1.y;

var dist:Number = Math.sqrt( dx * dx + dy * dy );

var speed:Number = dist / 60 / time;

var angle:Number = Math.atan2( dy, dx );

var vx:Number = Math.cos( angle ) * speed;

var vy:Number = Math.sin( angle ) * speed;

var speedPoint:Point = new Point( vx, vy );

return speedPoint;

}

 TEST