forked from: Dot Plot
ランダムに生成した数式をプロットします。
クリックで数式の生成をやり直します。
/**
* Copyright fluxus ( http://wonderfl.net/user/fluxus )
* MIT License ( http://www.opensource.org/licenses/mit-license.php )
* Downloaded from: http://wonderfl.net/c/oOZc
*/
// forked from hycro's Dot Plot
// ランダムに生成した数式をプロットします。
// クリックで数式の生成をやり直します。
package
{
import flash.display.Bitmap;
import flash.display.BitmapData;
import flash.display.Sprite;
import flash.events.Event;
import flash.events.MouseEvent;
import flash.filters.BlurFilter;
import flash.geom.ColorTransform;
import flash.geom.Matrix3D;
import flash.geom.Point;
import flash.geom.Vector3D;
[SWF(width="465", height="465", frameRate="60")]
public class Sketch03 extends Sprite
{
private var _canvas:BitmapData;
private var _points:Vector.<Number>;
private var _colorTransform:ColorTransform;
private var _blurFilter:BlurFilter;
public function Sketch03()
{
init();
}
private function init():void
{
_canvas = new BitmapData(465, 465, true, 0xFF000000);
addChild(new Bitmap(_canvas));
_points = createPoint();
_colorTransform = new ColorTransform(.9, .9, .9);
_blurFilter = new BlurFilter(2, 2);
addEventListener(Event.ENTER_FRAME, onEnterFrame);
stage.addEventListener(MouseEvent.CLICK, onClick);
}
private function createPoint():Vector.<Number>
{
var points:Vector.<Number> = new Vector.<Number>();
var fx:Function = createFunction();
var fy:Function = createFunction();
var fz:Function = createFunction();
var nx:Number;
var ny:Number;
var nz:Number;
var max:Array = [Number.MIN_VALUE, Number.MIN_VALUE, Number.MIN_VALUE];
var min:Array = [Number.MAX_VALUE, Number.MAX_VALUE, Number.MAX_VALUE];
for (var u:Number=0; u < 2*Math.PI; u += 0.07) {
for (var v:Number=0; v < 2*Math.PI; v += 0.07) {
nx = fx(u, v);
ny = fy(u, v);
nz = fz(u, v);
points.push(nx);
points.push(ny);
points.push(nz);
if (max[0] < nx) {
max[0] = nx;
}
if (min[0] > nx) {
min[0] = nx;
}
if (max[1] < ny) {
max[1] = ny;
}
if (min[1] > ny) {
min[1] = ny;
}
if (max[2] < nz) {
max[2] = nz;
}
if (min[2] > nz) {
min[2] = nz;
}
}
}
var scale:Number = 400 / Math.max(Math.abs(max[0] - min[0]),
Math.abs(max[1] - min[1]),
Math.abs(max[2] - min[2]));
for (var i:uint = 0; i < points.length; i++) {
points[i] *= scale;
}
return points;
}
private function createFunction():Function
{
var seed:Array = [];
for (var i:uint = 0; i<8; i++) {
seed.push(Math.random());
}
return function(u:Number, v:Number):Number
{
var v1:Number = randomOp(seed[0], v);
var v2:Number = randomOp(seed[1], v);
var v3:Number = randomOp(seed[2], v);
var v4:Number = randomOp(seed[3], v);
var u1:Number = randomOp(seed[4], u);
var u2:Number = randomOp(seed[5], u);
var u3:Number = randomOp(seed[6], u);
var u4:Number = randomOp(seed[7], u);
return randomOp2(seed[6],
randomOp2(seed[2], randomOp2(seed[1], randomOp2(seed[0], v1, v2), v3), v4),
randomOp2(seed[5], randomOp2(seed[4], randomOp2(seed[3], u1, u2), u3), u4));
}
}
private function randomOp(seed:Number, v:Number):Number
{
if (seed < .25) {
return Math.cos(v);
} else if (seed < .5) {
return Math.sin(v);
} else if (seed < .75) {
return Math.cos(v/2);
} else {
return Math.sin(v/2);
}
}
private function randomOp2(seed:Number, v:Number, u:Number):Number
{
if (seed < .25) {
return v + u;
} else if (seed < .5) {
return v * u;
} else if (seed < .75) {
return - v * u;
} else {
return v * v + u * u;
}
}
private function onEnterFrame(evt:Event):void
{
var mat:Matrix3D = new Matrix3D();
mat.appendRotation(1, Vector3D.Y_AXIS);
mat.transformVectors(_points, _points);
var c:uint;
var d:Number;
var length:uint = _points.length;
_canvas.lock();
_canvas.colorTransform(_canvas.rect, _colorTransform);
_canvas.applyFilter(_canvas, _canvas.rect, new Point(0, 0), _blurFilter);
for (var i:uint=0; i < length; i += 3) {
if (_points[i+2] > 0) {
d = 1 - Math.min(1, Math.abs(_points[i+2] / 200));
c = ((0xFF * d) << 16) | ((0xFF * d) << 8) | (0xFF * d);
} else {
c = 0xFFFFFF;
}
if (_canvas.getPixel(_points[i] + 232, _points[i+1] + 232) < c) {
_canvas.setPixel(_points[i] + 232, _points[i+1] + 232, c);
}
}
_canvas.unlock();
}
private function onClick(evt:MouseEvent):void
{
_points = createPoint();
}
}
}