荒技で回転 forked from: flash on 2009-8-23
参考にさせていただきました。
http://d.hatena.ne.jp/nitoyon/20090430/box2d_no_debug_draw
激しく気持ちわるい物体ができました
ソースにごみが多い。
整形するのめんどーなので放置。
荒技で回転
/**
* Copyright paq ( http://wonderfl.net/user/paq )
* MIT License ( http://www.opensource.org/licenses/mit-license.php )
* Downloaded from: http://wonderfl.net/c/4J8E
*/
// forked from mogera's flash on 2009-8-23
package
{
//参考にさせていただきました。
//http://d.hatena.ne.jp/nitoyon/20090430/box2d_no_debug_draw
// 激しく気持ちわるい物体ができました
// ソースにごみが多い。
// 整形するのめんどーなので放置。
//
// 荒技で回転
import Box2D.Dynamics.b2Body;
import flash.display.Bitmap;
import flash.display.BitmapData;
import flash.display.Loader;
import flash.display.Shape;
import flash.display.Sprite;
import flash.events.Event;
import flash.events.MouseEvent;
import flash.geom.Matrix;
import flash.geom.Point;
import flash.geom.Rectangle;
import flash.net.URLRequest;
import flash.system.LoaderContext;
import flash.display.DisplayObject;
[SWF(backgroundColor="#FFFFFF", frameRate=60)]
public class Main extends Sprite
{
private var view:View ;
private var count:int;
private var donut:b2Body;
private var loaded:Boolean;
private var bmp:Bitmap;
public function Main():void
{
Wonderfl.capture_delay( 12000 );
if (stage) init();
else addEventListener(Event.ADDED_TO_STAGE, init);
}
private function init(e:Event = null):void
{
removeEventListener(Event.ADDED_TO_STAGE, init);
// entry point
CreateBackGround();
// 描画コンテナ
view = new View(true)
addEventListener(MouseEvent.CLICK, CreateMogera) ;
donut = view.GetWorldBody();
view.CreateRegularPolygon(20,
200 / View.SCALE,
5 / View.SCALE,
new Point(240 / View.SCALE, 240/ View.SCALE),
donut);
//donut.SetMassFromShapes();
addEventListener(Event.ENTER_FRAME, RotateDonuts);
addChild(view);
// 描画物をロードします！
var loader:Loader = new Loader();
loader.contentLoaderInfo.addEventListener(Event.COMPLETE, CompleteLoad);
loader.load(new URLRequest("http://farm3.static.flickr.com/2457/3848593510_3b9d814d88_o.png"),
new LoaderContext(true));
}
private function CompleteLoad(e:Event):void
{
bmp = e.target.loader.content as Bitmap;
loaded = true;
trace("is loaded", loaded);
}
private function CreateMogera(event:MouseEvent) : void
{
if ( loaded )
{
view.CreateMogera(event.stageX / View.SCALE, event.stageY / View.SCALE, ToBmp(bmp));
}
}
private function RotateDonuts(e:Event):void
{
donut.SetXForm(donut.GetPosition(), donut.GetAngle() + 0.1);
}
/**
* DisplayObject → ビットマップ
* @param displayObject
* @return
*/
private function ToBmp( displayObject:DisplayObject ) : Bitmap
{
var rect:Rectangle;
var bmp_data:BitmapData;
var bmp:Bitmap;
var mat:Matrix;
rect = displayObject.getRect(null);
bmp_data = new BitmapData( rect.width, rect.height, true, 0x000000);
mat = new Matrix(1, 0, 0, 1, -rect.left, -rect.top );
bmp_data.draw( displayObject, mat );
bmp = new Bitmap( bmp_data );
bmp.x = rect.left;
bmp.y = rect.top;
return bmp;
}
private function CreateBackGround():void
{
var sprite:Sprite = new Sprite();
addChild( sprite );
var shape:Shape = new Shape();
shape.graphics.beginFill(0x000000, 1);
shape.graphics.drawRect(0, 0, stage.stageWidth, stage.stageHeight);
sprite.addChild(shape);
}
}
}
import authoring.authObject;
import Box2D.Collision.b2AABB;
import Box2D.Collision.Shapes.b2CircleDef;
import Box2D.Common.Math.b2Vec2;
import Box2D.Dynamics.b2Body;
import Box2D.Dynamics.b2BodyDef;
import Box2D.Dynamics.b2DebugDraw;
import Box2D.Dynamics.b2World;
import flash.display.Bitmap;
import flash.display.Graphics;
import flash.display.Loader;
import flash.display.MovieClip;
import flash.display.Sprite;
import Box2D.Collision.Shapes.b2PolygonDef;
import flash.events.Event;
import flash.external.ExternalInterface;
import flash.net.URLRequest;
import flash.text.TextField;
import flash.utils.getTimer;
internal class View extends Sprite
{
private var _world:b2World;
private var _gravity:b2Vec2;
private var _doSleep:Boolean;
private var _worldAABB:b2AABB;
private var _body:b2BodyDef;
private var _bodyPolygon:b2Body;
public static var SCALE:int = 100;
public function View(debug:Boolean = false)
{
// world;
_worldAABB = new b2AABB();
_worldAABB.lowerBound.Set( -500.0, -500.0);
_worldAABB.upperBound.Set( 500.0, 500.0);
_gravity = new b2Vec2(0.0, 5.0);
_doSleep = true;
_world = new b2World(_worldAABB, _gravity, _doSleep);
_body = new b2BodyDef();
_body.position.Set(0,0);
_bodyPolygon = _world.CreateBody(_body);
if ( debug )
{
Debug();
}
addEventListener(Event.ENTER_FRAME, EnterFrame);
}
public function GetWorldBody() :b2Body
{
return _world.CreateBody(_body);
}
// 忘れ物！
private function EnterFrame(e:Event):void
{
// これを忘れると描画されない！
_world.Step(1 / 60, 10);
// Sprite の場所を更新する
for (var b:b2Body = _world.GetBodyList(); b; b = b.GetNext())
{
var sprite:Sprite = b.GetUserData() as Sprite;
if (sprite){
sprite.x = b.GetWorldCenter().x * SCALE;
sprite.y = b.GetWorldCenter().y * SCALE;
sprite.rotation = b.GetAngle() * 180 / Math.PI;
}
// 画面外に出たオブジェクトを削除する
if (sprite != null && sprite.y > 600){
_world.DestroyBody(b);
Bitmap(sprite.getChildAt(0)).bitmapData.dispose();
removeChild(sprite);
}
}
}
//debug
private function Debug() : void
{
var dbgDraw:b2DebugDraw = new b2DebugDraw();
dbgDraw.m_sprite = this;
dbgDraw.m_drawScale = SCALE;
dbgDraw.m_fillAlpha= 0.8;
dbgDraw.m_lineThickness= 1.0;
dbgDraw.m_alpha=1.0;
dbgDraw.m_xformScale = 1.0;
dbgDraw.m_drawFlags = b2DebugDraw.e_shapeBit;
_world.SetDebugDraw(dbgDraw);
trace("debug");
}
public function CreateRegularPolygon( num:int, radiusIn:Number, radiusWidth:Number,center:Point, b2body:b2Body = null ) : b2Body
{
if ( b2body == null )
{
b2body = _world.CreateBody(_body);
}
var divisionAngle:Number = 360 / num;
for ( var a:int = 0; a < num; a ++ )
{
// 計算のためのtmp
var angle:Number = ToRad(divisionAngle * a) ;
var radiusOut:Number = radiusIn + radiusWidth;
// 初期ﾎﾟｲﾝﾄ
var cos:Number = Math.cos(angle);
var sin:Number = Math.sin(angle);
var rI:Point = new Point(cos * radiusIn, sin * radiusIn);
var rO:Point = new Point(cos * radiusOut, sin * radiusOut);
// N 次のﾎﾟｲﾝﾄ
var angleN:Number = ToRad(divisionAngle * (a+1)) ;
var cosN:Number = Math.cos(angleN);
var sinN:Number = Math.sin(angleN);
var rIN:Point = new Point(cosN * radiusIn, sinN * radiusIn);
var rON:Point = new Point(cosN * radiusOut, sinN * radiusOut);
var poly:b2PolygonDef = new b2PolygonDef();
poly.vertexCount = 4;
poly.vertices[0].Set(rI.x, rI.y);
poly.vertices[1].Set(rO.x, rO.y);
poly.vertices[2].Set(rON.x, rON.y);
poly.vertices[3].Set(rIN.x, rIN.y );
poly.density = 1;
poly.restitution = 2.4;
poly.friction = 0.1;
b2body.CreateShape(poly);
}
b2body.SetXForm(new b2Vec2(center.x, center.y),0)
return b2body;
}
public function CreateMogera( x:Number, y:Number, bitmap:Bitmap) : void
{
var b2body:b2Body = _world.CreateBody(_body);
var circle:b2CircleDef = new b2CircleDef();
circle.radius = (Math.random() * 30 + 10) / SCALE;
circle.density = 1;
circle.restitution = 0.8;
circle.friction = 0.1;
bitmap.width = circle.radius * 2 * SCALE;
bitmap.height = circle.radius * 2 * SCALE;
bitmap.x = - circle.radius * SCALE;
bitmap.y = - circle.radius * SCALE;
b2body.CreateShape(circle);
b2body.SetXForm(new b2Vec2(x ,y), 0);
b2body.m_userData = new Sprite();
b2body.GetUserData().x = b2body.GetWorldCenter().x;
b2body.GetUserData().y = b2body.GetWorldCenter().y;
b2body.GetUserData().addChild( bitmap );
addChild(b2body.GetUserData());
b2body.SetMassFromShapes();
}
public function ToRad( deg:Number ) : Number
{
return deg / 180 * (Math.PI)
}
}
import flash.geom.Point;
internal class Polygon
{
public var p0:Point;
public var p1:Point;
public var p2:Point;
}