flash on 2015-12-16
布シミュをいじってみる by NOVO
動作が変わってしまうのでfork
ToDo 3Dにしてみたい
ToDo 単位系をそろえる
Done Fの計算が終わる前にXを動かしているのが偏りの原因っぽい
Done せん断抵抗、角度抵抗用のJointを設定したい
ToDo 微小時間でシミュレート
ToDo 積分法を変えてみる？
Done 初期化変更、必要ない変数も消す。描画方法もJointの描画だけでいいのでは？
Done 片方向のJointを両方向に変更（力の計算場所も変更）
Done ダンパ力を設定
Done 簡易ベクトルクラスに置き換え
Done ばねの自然長計算を変更
以下オリジナルコメント
GraphicsPathCommandでラインを描画するバージョン。
drawLine関数の中が違います。
本格的な布のシミュレーションではありません。
ドラッグでマウスに一番近いポイントを移動させる。
ctrlキー押しながらドラッグで固定。
ダブルクリックで固定を解除。
/**
* Copyright AspergerNico ( http://wonderfl.net/user/AspergerNico )
* MIT License ( http://www.opensource.org/licenses/mit-license.php )
* Downloaded from: http://wonderfl.net/c/KpGR
*/
package {
import flash.display.MovieClip;
import flash.media.Microphone;
import flash.display.Sprite;
import flash.display.Graphics;
import flash.events.Event;
import flash.events.MouseEvent;
public class FlashTest extends MovieClip {
private var dxy:Number = 15;
private var w:uint = Math.floor(stage.stageWidth / dxy);
private var h:uint = Math.floor(stage.stageHeight / dxy);
//
private var d_mc:MovieClip;
private var mi_ar:Array;
private var canvas:MovieClip
public function FlashTest() {
stage.frameRate = 30;
canvas = new MovieClip();
addChild(canvas)
// constructor code
var i:uint;
var ii:uint;
var scx:Number = stage.stageWidth * .5;
var scy:Number = stage.stageHeight * .5;
//
w = Math.floor(stage.stageWidth / dxy);
h = Math.floor(stage.stageHeight / dxy);
//
var sx:Number = (stage.stageWidth - dxy * (w - 1)) * 0.5
var sy:Number = (stage.stageHeight - dxy * (h - 1)) * 0.5
//
var p:MovieClip;
mi_ar = new Array()
for (i = 0; i < h; i++) {
for (ii = 0; ii < w; ii++) {
if ((i == 0) || (i==h - 1) || (ii == 0) || (ii == w - 1)) {
p = new Pin();
}
else{
p = new Mi();
}
canvas.addChild(p);
p.x = sx + ii * dxy;
p.y = sy + i * dxy;
mi_ar.push(p)
}
}
for (i = 0; i < mi_ar.length; i++) {
if (i > w - 1 && i < mi_ar.length - w && i % w != 0 && i % w != w - 1){
p=mi_ar[i];
p.x += -10 + 20 * Math.random();
p.y += -10 + 20 * Math.random();
p.init([mi_ar[i-1], mi_ar[i+1], mi_ar[i-w], mi_ar[i+w]])
}
}
addEventListener(Event.ENTER_FRAME, onEnterFrame);
}
private function onEnterFrame(evt:Event):void{
var i:uint;
var ii:uint;
var g:Graphics = canvas.graphics;
g.clear()
g.lineStyle(1,0xFF0000);
for (i = 0; i < mi_ar.length; i++) {
if (i < mi_ar.length - w && i % w != w - 1) {
g.moveTo(mi_ar[i].x, mi_ar[i].y);
g.lineTo(mi_ar[i + 1].x, mi_ar[i + 1].y);
g.lineTo(mi_ar[i + w + 1].x, mi_ar[i + w + 1].y);
g.lineTo(mi_ar[i + w].x, mi_ar[i + w].y);
g.lineTo(mi_ar[i].x, mi_ar[i].y);
}
}
}
}
}
import flash.display.Graphics;
import flash.display.MovieClip;
import flash.events.Event;
import flash.events.MouseEvent;
class Mi extends MovieClip {
private var m:Number = 1
private var k:Number = 0.01;
private var t:Number = 0.02;
private var m_ar:Array;
private var power_:Number = 0;
private var ax:Number;
private var ay:Number;
private var vx:Number;
private var vy:Number;
private var flag:Boolean = true;
public function Mi() {
setPower(1);
}
public function init(_ar:Array):void{
m_ar = _ar;
ax = 0;
vx = 0;
ay = 0;
vy = 0;
this.buttonMode = true;
this.addEventListener(Event.ENTER_FRAME, onEnterFrame);
this.addEventListener(MouseEvent.MOUSE_DOWN, onMouseDown);
}
public function setPower(power:Number):void {
power_ = power;
var g:Graphics = this.graphics;
g.clear();
g.beginFill(createColorFromPower(power));
g.drawCircle(0, 0, 5);
}
private function createColorFromPower(power:Number):uint {
return (uint)(0xFF0000 * power);
}
private function onMouseDown(evt:MouseEvent):void {
flag = false;
this.startDrag()
stage.addEventListener(MouseEvent.MOUSE_UP, onMouseUp);
}
private function onMouseUp(evt:MouseEvent):void{
flag = true;
this.stopDrag();
vx = 0;
vy = 0;
stage.removeEventListener(MouseEvent.MOUSE_UP, onMouseUp)
}
private function onEnterFrame(evt:Event):void{
if (flag) {
var i:uint
var dx:Number = 0;
var dy:Number = 0;
for (i=0; i<m_ar.length; i++) {
var mc:MovieClip = m_ar[i];
dx += mc.x - this.x;
dy += mc.y - this.y;
}
ax = k*dx//
ay = k*dy//
vx += ax-t*vx;
vy += ay-t*vy;
this.x += vx;
this.y += vy;
}
}
}
import flash.display.MovieClip;
import flash.display.Graphics;
import flash.events.MouseEvent;
class Pin extends MovieClip {
public function Pin() {
// constructor code
var g:Graphics = this.graphics;
g.beginFill(0x000000);
g.drawCircle(0, 0, 5);
this.buttonMode = true;
this.addEventListener(MouseEvent.MOUSE_DOWN, onMouseDown)
}
private function onMouseDown(evt:MouseEvent):void{
this.startDrag()
stage.addEventListener(MouseEvent.MOUSE_UP, onMouseUp);
}
private function onMouseUp(evt:MouseEvent):void{
this.stopDrag();
this.removeEventListener(MouseEvent.MOUSE_UP, onMouseUp);
}
}