forked from: Yawaraka Balls
/**
* Copyright yumoi ( http://wonderfl.net/user/yumoi )
* MIT License ( http://www.opensource.org/licenses/mit-license.php )
* Downloaded from: http://wonderfl.net/c/awwp
*/
// forked from k0rin's Yawaraka Balls
package {
import flash.display.*;
[SWF(width = "465", height = "465", frameRate = "60")]
public class Main extends Sprite {
public function Main() {
main = this;
initialize();
}
}
}
import flash.display.*;
import flash.events.*;
import flash.filters.*;
import flash.geom.*;
import flash.text.*;
var main:Main;
var floor:Sprite = new Sprite();
var space:Sprite = new Sprite();
const SCREEN_W:int = 465;
const SCREEN_H:int = 465;
const FLOOR_Y:Number = 400;
class Ball {
private var radius:Number;
private var x:Number;
private var y:Number;
private var vx:Number;
private var vy:Number;
// contact offset point for deformation
private var cx:Number = 0;
private var cy:Number = 0;
private var priority:int = 0;
private var body:Shape;
private var shadow:Shape;
private var shadowFilter:BlurFilter = new BlurFilter();
private static var matrix:Matrix = new Matrix();
function Ball(radius:Number, color:uint) {
this.radius = radius;
x = random(radius, SCREEN_W - radius);
y = random(50, FLOOR_Y - radius);
vx = random( -1.5, 1.5);
vy = random( 0, 1.5);
body = new Shape();
var g:Graphics = body.graphics;
matrix.createGradientBox(radius * 2, radius * 2, 0, -radius, -radius);
g.beginGradientFill(GradientType.RADIAL,
[color, color, color], [0.9, 0.8, 0.4], [0, 240, 255], matrix);
g.drawCircle(0, 0, radius);
g.endFill();
shadow = new Shape();
g = shadow.graphics;
g.beginFill(0x000050);
g.drawCircle(0, 0, radius);
g.endFill();
floor.addChild(shadow);
space.addChild(body);
}
// 接触点の絶対座標を指定
public function contact(contactX:Number, contactY:Number, priority:int, force:Number):void {
var tx:Number = contactX - x;
var ty:Number = contactY - y;
var angle:Number = Math.atan2(ty, tx);
var length:Number = Math.sqrt(tx * tx + ty * ty);
vx -= (1 - length / radius) * force * Math.cos(angle);
vy -= (1 - length / radius) * force * Math.sin(angle);
// 変形のための接触点は１つしか使用できない。床を優先させる。
if (this.priority < priority) {
this.priority = priority;
cx = tx;
cy = ty;
}
}
public function update():void {
cx = 0;
cy = 0;
priority = 0;
x += vx;
y += vy;
if (x - radius < 0) {
contact(0, y, 1, 0.125);
}
if (x + radius > SCREEN_W) {
contact(SCREEN_W, y, 1, 0.125);
}
if (y + radius > FLOOR_Y) {
contact(x, FLOOR_Y, 3, 0.125);
} else {
vy += 0.005;
}
// すごい勢いで壁にぶつかったときは即座に反射
if (x < 0 || x > SCREEN_W) { vx = -vx; }
if (y > FLOOR_Y) { vy = -vy; }
// 画面外のボールをこっそり減速して、全体の動きを永続化
if (y < -radius) {
vx *= 0.9996;
vy *= 0.9996;
}
}
public function hitTest(ball:Ball):void {
var dx:Number = ball.x - x;
var dy:Number = ball.y - y;
var distanceSquared:Number = dx * dx + dy * dy;
var contactDistance:Number = radius + ball.radius;
if (distanceSquared < contactDistance * contactDistance) {
var tx:Number = linearTransform(radius, 0, contactDistance, x, ball.x);
var ty:Number = linearTransform(radius, 0, contactDistance, y, ball.y);
contact(tx, ty, 2, 0.2);
ball.contact(tx, ty, 2, 0.2);
}
}
public function render():void {
matrix.identity();
if (priority > 0) {
var angle:Number = Math.atan2(cy, cx);
var length:Number = Math.sqrt(cx * cx + cy * cy);
matrix.scale(length / radius, 1 + (1 - length / radius)); // 縦方向は適当
matrix.rotate(angle);
}
matrix.translate(x, y);
body.transform.matrix = matrix;
var height:Number = FLOOR_Y - (y + radius);
shadow.x = x;
shadow.y = FLOOR_Y + height * 0.3;
shadow.alpha = linearTransform(height, 0, 300, 0.3, 0);
var scale:Number = 1.2 + height * 0.005;
shadow.width = body.width * scale ;
shadow.height = body.height * scale * 0.2;
var blur:Number = linearTransform(height, 0, 200, 3, 25);
shadowFilter.blurX = blur;
shadowFilter.blurY = blur / 3;
shadow.filters = [ shadowFilter ];
}
}
var balls:Vector.<Ball> = new Vector.<Ball>();
function initialize():void {
balls.push(new Ball(60, 0x000000));
balls.push(new Ball(45, 0xFF0000));
balls.push(new Ball(30, 0x20C040));
balls.push(new Ball(30, 0xA0A0B0));
balls.push(new Ball(20, 0xC08080));
balls.push(new Ball(20, 0x706050));
balls.push(new Ball(20, 0xF0A090));
var background:Shape = new Shape();
var g:Graphics = background.graphics;
var matrix:Matrix = new Matrix();
matrix.createGradientBox(SCREEN_W, SCREEN_H, Math.PI / 2);
g.beginGradientFill(GradientType.LINEAR,
[0xFFFFF8, 0xE0E0E0, 0xD0D0D0, 0xF8F8F0, 0xFFFFF8], null, [0, 150, 168, 170, 255], matrix);
g.drawRect(0, 0, SCREEN_W, SCREEN_H);
g.endFill();
main.addChild(background);
main.addChild(floor);
main.addChild(space);
main.addEventListener(Event.ENTER_FRAME, enterFrameHandler);
}
function enterFrameHandler(event:Event):void {
for (var i:int = 0; i < 4; i++) {
for each (var ball:Ball in balls) {
ball.update();
}
for (var n:int = 0; n < balls.length; n++) {
for (var m:int = n + 1; m < balls.length; m++) {
balls[n].hitTest(balls[m]);
}
}
}
for each (ball in balls) {
ball.render();
}
}
function random(min:Number, max:Number):Number {
return min + Math.random() * (max - min);
}
function linearTransform(n:Number, s0:Number, s1:Number, d0:Number, d1:Number):Number {
return (d0 + (n - s0) * (d1 - d0) / (s1 - s0));
}