くるくるカール（forked from: Draw worm by mouse gesture）
frocessing.geom.FMatrix2Dの使い方がいまだによく理解できていないのですが・・・
※110510 画像を保存できるバージョンも作ってみました。 http://www.digifie.jp/labo/kurukuru/
// forked from nutsu's Draw worm by mouse gesture.
// forked from nutsu's Worm matrix based.
/**
LOVE MATRIX.
a study for drawing curl curve.
license under the GNU Lesser General Public License.
*/
package
{
import flash.display.Sprite;
[SWF(width = "465", height = "465", frameRate = "60", backgroundColor = "0")]
public class Main extends Sprite
{
private var _canvas:WormMatrix;
public function Main()
{
_canvas = new WormMatrix();
addChild(_canvas);
}
}
}
//package {
import frocessing.display.F5MovieClip2DBmp;
import frocessing.geom.FMatrix2D;
import frocessing.color.ColorHSV;
import flash.geom.ColorTransform;
internal class WormMatrix extends F5MovieClip2DBmp{
private var vms:Array;
private var MAX_NUM:int = 150;
private var N:Number = 120;
private var px:Number;
private var py:Number;
//private var col:uint;
private var ct:ColorTransform = new ColorTransform(.995, .995, .995);
private var t:Number = 0;
public function WormMatrix () {
//col = c
super( false, 0 );
vms = [];
}
public function check():void
{
var x0:Number = mouseX;
var y0:Number = mouseY;
var vx:Number = x0 - px;
var vy:Number = y0 - py;
var len:Number = min( mag( vx, vy ), 50 );
if( len<10 ) return;
var mtx:FMatrix2D = new FMatrix2D();
mtx.rotate( atan2( vy, vx ) );
mtx.translate( x0, y0 );
createObj( mtx, len );
px = x0;
py = y0;
}
public function createObj( mtx:FMatrix2D, len:Number ):void
{
var angle:Number = random(PI/180, PI/2);
if( Math.random() > 0.5 ) angle *= -1;
var tmt:FMatrix2D = new FMatrix2D();
tmt.scale( 0.95, 0.95 );
tmt.rotate( angle );
tmt.translate( len, 0 );
var w:Number = 0.5;
var obj:WormObject = new WormObject();
obj.c1x = obj.p1x = -w * mtx.c + mtx.tx;
obj.c1y = obj.p1y = -w * mtx.d + mtx.ty;
obj.c2x = obj.p2x = w * mtx.c + mtx.tx;
obj.c2y = obj.p2y = w * mtx.d + mtx.ty;
obj.vmt = mtx;
obj.tmt = tmt;
obj.r = angle;
obj.w = len * .1;
obj.count = 0;
vms.push( obj );
if( vms.length > MAX_NUM )
vms.shift();
}
public function setup():void
{
size( 465, 465 );
background(0);
noStroke();
px = mouseX;
py = mouseY;
}
public function draw():void
{
if( isMousePressed )
{
background(0);
vms = [];
}
stroke(0xFFFFFF, .4);
var len:int = vms.length;
for( var i:int=0; i<len; i++ )
{
var o:WormObject = vms[i];
if( o.count<N ){
drawWorm( o );
o.count++;
}else{
len--;
vms.splice( i, 1 );
i--;
}
}
check();
bitmapData.colorTransform( bitmapData.rect, ct );
}
public function drawWorm( obj:WormObject ):void
{
var color:ColorHSV = new ColorHSV(t, 0.6, 1, 0.1);
t += 0.1;
if( Math.random()>0.9 ){
obj.tmt.rotate( -obj.r*2 );
obj.r *= -1;
}
obj.vmt.prepend( obj.tmt );
var cc1x:Number = -obj.w*obj.vmt.c + obj.vmt.tx;
var cc1y:Number = -obj.w*obj.vmt.d + obj.vmt.ty;
var pp1x:Number = (obj.c1x+cc1x)/2;
var pp1y:Number = (obj.c1y+cc1y)/2;
var cc2x:Number = obj.w*obj.vmt.c + obj.vmt.tx;
var cc2y:Number = obj.w*obj.vmt.d + obj.vmt.ty;
var pp2x:Number = (obj.c2x+cc2x)/2;
var pp2y:Number = (obj.c2y+cc2y)/2;
beginFill( uint(color), .7 );
moveTo( obj.p1x, obj.p1y );
curveTo( obj.c1x, obj.c1y, pp1x, pp1y );
lineTo( pp2x, pp2y );
curveTo( obj.c2x, obj.c2y, obj.p2x, obj.p2y );
closePath();
endFill();
obj.c1x = cc1x;
obj.c1y = cc1y;
obj.p1x = pp1x;
obj.p1y = pp1y;
obj.c2x = cc2x;
obj.c2y = cc2y;
obj.p2x = pp2x;
obj.p2y = pp2y;
}
}
//}
import frocessing.geom.FMatrix2D;
internal class WormObject{
public var c1x:Number;
public var c1y:Number;
public var c2x:Number;
public var c2y:Number;
public var p1x:Number;
public var p1y:Number;
public var p2x:Number;
public var p2y:Number;
public var w:Number;
public var r:Number;
public var count:int;
public var vmt:FMatrix2D;
public var tmt:FMatrix2D;
}