flash on 2009-11-27
/**
* Copyright flaanton ( http://wonderfl.net/user/flaanton )
* MIT License ( http://www.opensource.org/licenses/mit-license.php )
* Downloaded from: http://wonderfl.net/c/rK1i
*/
package {
import flash.display.*;
import flash.events.*;
import flash.geom.*;
import flash.filters.*;
import flash.text.*;
[SWF(width="240", height="240", backgroundColor="#406080", frameRate=30)]
public class main extends Sprite
{
static public var base:BitmapData = new BitmapData(240, 240, false); // base image
static private var pixels:BitmapData = new BitmapData(240, 240, false); // displaying image
static private var screen:Bitmap = new Bitmap(pixels); // displaying image
static private var balls:Vector.<ball>; // meta-balls array
static private var ptBallsCenter:Point = new Point(); // balls center position
static private var matFace:Matrix = new Matrix(); // face matrix
static private var colt:ColorTransform = new ColorTransform(32,4,1.6,1,-1280,-320,-320,0);
static private var conv:ConvolutionFilter = new ConvolutionFilter(3, 3, [-2.5,-2.5,0,-2.5,0,2.5,0,2.5,2.5], 1, 128);
static private var face:BitmapData; // face image
public function main()
{
var i:int;
// draw meta-ball gradation
ball.pat = new BitmapData(ball.R*2,ball.R*2,false,0);
var shp:Shape = new Shape(), mtx:Matrix = new Matrix();
mtx.createGradientBox(ball.R*2,ball.R*2,0,0);
shp.graphics.beginGradientFill(GradientType.RADIAL, [0x808080,0x000000], [1,1], [0,255], mtx);
shp.graphics.drawRect(0,0,ball.R*2,ball.R*2);
shp.graphics.endFill();
base.draw(shp);
base.draw(shp, null, null, BlendMode.MULTIPLY);
ball.pat.applyFilter(base, ball.pat.rect, ball.pat.rect.topLeft, new BlurFilter(16, 16));
// draw face
face = new BitmapData(48, 16, true, 0x00000000);
var tf:TextField = new TextField();
tf.width = 48;
tf.height = 16;
tf.defaultTextFormat = new TextFormat('MS Gothic', 12, 0, null, null, null, null, null, 'center');
tf.text = "oﾟωﾟo";
face.draw(tf);
tf.width = 240;
tf.textColor = 0x808080;
tf.text = "Pinch this by mouse";
// create ball instance
balls = new Vector.<ball>(16, true);
for (i=0; i<balls.length; i++) { balls[i] = new ball(); }
// set sprite/event
addChild(screen);
addChild(tf);
stage.doubleClickEnabled = true;
stage.addEventListener(Event.ENTER_FRAME, _onEnterFrame);
stage.addEventListener(MouseEvent.MOUSE_DOWN, _onMouseDown);
stage.addEventListener(MouseEvent.MOUSE_UP, _onMouseUp);
}
private function _onEnterFrame(event:Event) : void
{
var i:int, j:int;
// execute
ball.mouse.x = mouseX;
ball.mouse.y = mouseY;
for (i=0; i<balls.length; i++) { ball(balls[i]).gravity(); }
for (i=0; i<balls.length-1; i++) for (j=i+1; j<balls.length; j++) { ball(balls[i]).interact(ball(balls[j])); }
for (i=0; i<balls.length; i++) { ball(balls[i]).run(); }
calcBallCenter();
// draw
base.fillRect(pixels.rect,0x000000);
for (i=0; i<balls.length; i++) { ball(balls[i]).draw(base); }
pixels.applyFilter(base, pixels.rect, pixels.rect.topLeft, conv);
base.colorTransform(pixels.rect, colt);
pixels.draw(base,null,null,BlendMode.MULTIPLY);
drawFace();
}
private function _onMouseDown(event:MouseEvent) : void
{
for (var i:int=0; i<balls.length; i++) { ball(balls[i]).check_hold(event.localX, event.localY); }
}
private function _onMouseUp(event:MouseEvent) : void
{
for (var i:int=0; i<balls.length; i++) { ball(balls[i]).holding = false; }
}
private function calcBallCenter() : void
{
ptBallsCenter.x = 0;
ptBallsCenter.y = 0;
for (var i:int=0; i<balls.length; i++) { ptBallsCenter.offset(balls[i].pos.x, balls[i].pos.y); }
var dv:Number=1/balls.length;
ptBallsCenter.x *= dv;
ptBallsCenter.y *= dv;
}
private function drawFace() : void
{
matFace.identity();
matFace.translate(-24, -8);
matFace.rotate(Math.atan2(balls[0].pos.y-ptBallsCenter.y, balls[0].pos.x-ptBallsCenter.x));
matFace.translate(ptBallsCenter.x, ptBallsCenter.y);
pixels.draw(face, matFace, null, null, null, true);
}
}
}
import flash.display.*;
import flash.geom.*;
class ball
{
static internal var pat:BitmapData;
static internal var R :Number = 48; // radius
static internal var K :Number = 0.025; // spring
static internal var K2:Number = 0.3; // dumper
static internal var D :Number = 48; // comfortable distance
static internal var G :Number = 1.2; // gravity
static internal var HR:Number = 32*32; // holding radius ^ 2
static internal var mouse:Point=new Point();
internal var a:Point=new Point(), v:Point=new Point(), pos:Point=new Point(), hold:Point=new Point();
internal var mat:Matrix = new Matrix();
internal var holding:Boolean = false;
function ball() { reset(); }
internal function reset() : void {
pos.x = Math.random()*R+120;
pos.y = Math.random()*R;
v.x=0; v.y=0; a.x=0; a.y=0;
holding = false;
}
internal function run() : void {
if (holding) {
pos.x = mouse.x + hold.x;
pos.y = mouse.y + hold.y;
} else {
pos.x += v.x + a.x * 0.5;
pos.y += v.y + a.y * 0.5;
v.x += a.x - v.x * K2;
v.y += a.y - v.y * K2;
if (pos.y>240) { v.y=-v.y; pos.y=480-pos.y; }
if (pos.x<0) { v.x=-v.x; pos.x=-pos.x; } else
if (pos.x>240) { v.x=-v.x; pos.x=480-pos.x; }
}
mat.identity();
mat.translate(pos.x-R, pos.y-R);
}
internal function draw(base:BitmapData) : void { base.draw(pat, mat, null, BlendMode.ADD); }
internal function gravity() : void { a.x = 0; a.y = G; }
internal function interact(b:ball) : void {
var dx:Number = b.pos.x - pos.x;
var dy:Number = b.pos.y - pos.y;
var l:Number = Math.sqrt(dx*dx+dy*dy);
var f:Number = (D-l)*K/l;
dx *= f; dy *= f;
a.x -= dx; a.y -= dy;
b.a.x += dx; b.a.y += dy;
}
internal function check_hold(x_:Number, y_:Number) : void {
hold.x = pos.x-x_; hold.y = pos.y-y_;
holding = (hold.x*hold.x+hold.y*hold.y<HR);
}
}