ちょっとモヤッとするなにか（IK Example）
最後まで伸びてくれないチェーンのようなものにちょっとモヤッとします。
/**
* Copyright mousepancyo ( http://wonderfl.net/user/mousepancyo )
* MIT License ( http://www.opensource.org/licenses/mit-license.php )
* Downloaded from: http://wonderfl.net/c/aruo
*/
package {
import flash.display.Sprite;
import flash.filters.GlowFilter;
[SWF(backgroundColor=0xFFFFFF, width=465, height=465, frameRate=30)]
public class Main extends Sprite {
private var numRopes:Number = 5;
public function Main() {
for( var i:int = 0; i < numRopes; i++ ){
var posX:Number = (( 200 / (numRopes-1) ) * i) + 132;
for(var n:int = 0; n < numRopes; n++){
var posY:Number = (( 200 / (numRopes-1) ) * n) + 132;
var chain:IKLine = new IKLine( posX, posY , 20);
addChild(chain);
chain.filters = [new GlowFilter(0, 1, 2, 2, 3, 1, false, false)]
}
}
}
}
}
import flash.display.Sprite;
import flash.events.Event;
import flash.geom.Point;
class IKLine extends Sprite {
private var _segments:Array;
private var _segmentNum:Number = 10;
public function IKLine(posX:Number, posY:Number, len:int) {
_segments = new Array();
for(var i:uint = 0; i<_segmentNum; i++){
var seg:IKSegment = new IKSegment(len, 3);
addChild(seg);
_segments.push(seg);
}
seg.x = posX;
seg.y = posY;
addEventListener(Event.ENTER_FRAME, update);
}
private function update(e:Event):void {
var p:Point = reach(_segments[0], mouseX, mouseY);
for(var i:uint = 1; i < _segmentNum; i++){
var seg:IKSegment = _segments[i];
p = reach(seg, p.x, p.y);
}
for(i = _segmentNum - 1; i>0; i--){
var segA:IKSegment = _segments[i];
var segB:IKSegment = _segments[i-1];
position(segB, segA);
}
}
private function reach(seg:IKSegment, xPos:Number, yPos:Number):Point {
var dx:Number = xPos - seg.x;
var dy:Number = yPos - seg.y;
var angle:Number = Math.atan2(dy, dx);
seg.rotation = angle * 180 / Math.PI;
//
var w:Number = seg.getPin().x - seg.x;
var h:Number = seg.getPin().y - seg.y;
var tx:Number = xPos - w;
var ty:Number = yPos - h;
var p:Point = new Point(tx, ty);
return p;
}
private function position(segA:IKSegment, segB:IKSegment):void {
segA.x = segB.getPin().x;
segA.y = segB.getPin().y;
}
}
import flash.display.Sprite;
import flash.geom.Point;
class IKSegment extends Sprite {
private var _width:Number;
private var _height:Number;
public var vx:Number = 0;
public var vy:Number = 0;
public function IKSegment(w:Number,h:Number) {
_width = w;
_height = h;
//
graphics.beginFill(0xFFFFFF);
graphics.drawCircle(0, 0, 3);
graphics.drawCircle(_width, 0, 3);
graphics.drawRoundRect(-_height * .5, -_height * .5, _width+_height, _height, _height, _height);
}
public function getPin():Point {
var angle:Number = rotation * Math.PI / 180;
var xPos:Number = x + Math.cos(angle) * _width;
var yPos:Number = y + Math.sin(angle) * _width;
var p:Point = new Point(xPos, yPos);
return p;
}
}