Distance Spring
/**
* Copyright shapevent ( http://wonderfl.net/user/shapevent )
* MIT License ( http://www.opensource.org/licenses/mit-license.php )
* Downloaded from: http://wonderfl.net/c/yOy4
*/
package {
import flash.display.*;
import flash.geom.*;
import flash.events.*;
import flash.utils.getTimer;
[SWF(backgroundColor=0x222222, width=500, height=500)]
public class DistSpring extends MovieClip {
private var hsw:Number;
private var hsh:Number;
private var pointNum:int;
private var points3D:Vector.<Number>;
private var points3Dout:Vector.<Number>;
private var points2D:Vector.<Number>;
private var uvts:Vector.<Number>;
private var sorted:Array;
private var pnt:Point;
private var m:Matrix3D;
private var v:Vector3D;
private var p:PerspectiveProjection;
private var proj:Matrix3D;
private var dx:Number;
private var dy:Number;
public function DistSpring(){
// init
hsw = stage.stageWidth / 2;
hsh = stage.stageHeight / 2;
pointNum = 800
points3D = new Vector.<Number>();
points3Dout = new Vector.<Number>();
points2D = new Vector.<Number>();
uvts = new Vector.<Number>();
sorted = [];
pnt = new Point();
m = new Matrix3D();
v = new Vector3D();
for (var i:int = 0; i<pointNum; i++){
v.y = i * 0.7 - 300
var t:Number = Math.random()*6.28;
v.x = 200 * Math.cos(i * 2 * Math.PI / 180);
v.z = 200 * Math.sin(i * 2 * Math.PI / 180);
v = m.transformVector(v);
points3D.push(v.x, v.y, v.z);
points2D.push(0,0);
uvts.push(0,0,0);
sorted.push(new Vector3D());
}
points3D.fixed = true;
points2D.fixed = true;
uvts.fixed = true;
p = new PerspectiveProjection();
proj = p.toMatrix3D();
dx = 0, dy = 0;
addEventListener(Event.ENTER_FRAME, onLoop);
}
// private methods
private function onLoop(evt:Event):void {
var i:int, j:int;
dx += (mouseX - dx) / 4;
dy += (mouseY - dy) / 4;
m.identity();
m.appendRotation(getTimer() / 4, Vector3D.Y_AXIS);
m.transformVectors(points3D, points3Dout);
m.identity();
m.appendRotation(dx, Vector3D.Z_AXIS);
m.appendRotation(dy, Vector3D.X_AXIS);
m.appendTranslation(0, 0, 1000);
m.append(proj);
Utils3D.projectVectors(m, points3Dout, points2D, uvts);
for (i = 0, j = 0; i<points2D.length; i+=2, j++){
sorted[j].x = points2D[i] + hsw;
sorted[j].y = points2D[i + 1] + hsh;
sorted[j].z = uvts[j * 3 + 2];
}
sorted.sortOn("z", Array.NUMERIC);
graphics.clear();
for(i = 0; i<sorted.length; i++){
var zpos:Number = sorted[i].z * 10000;
var c:int = zpos * 14;
graphics.beginFill(c <<16 | c <<8 | c);
graphics.drawCircle(sorted[i].x, sorted[i].y, zpos);
graphics.endFill();
}
}
}
}