flash on 2009-10-14 box2d test

by sowcodWonderfl 16 Nov 2009

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/**
 * Copyright sowcodWonderfl ( http://wonderfl.net/user/sowcodWonderfl )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/tuGp
 */

package {
    import flash.display.*;
    import Box2D.Dynamics.*;
    import Box2D.Common.Math.*;
    import Box2D.Collision.Shapes.*;
    import flash.events.*;
    [SWF(backgroundColor="#000000", frameRate="60")]
    public class FlashTest extends Sprite {
        private var field:MyWorld;
        private var drawer:MyDrawer;
        private var overlay:Sprite;
        public function FlashTest() {
            // write as3 code here..
            this.field = new MyWorld();
            this.drawer = new MyDrawer(this,this.field);
            this.addChild(this.drawer);
            
            this.overlay = new Sprite();
            this.addChild(this.overlay);
            
            this.createBodys();
            
            this.addEventListener(Event.ENTER_FRAME,this.onEnterFrame);
        }
        
        private function onEnterFrame(ev:Event):void {
/*
            var g:Graphics = this.overlay.graphics;
            g.clear();
            g.lineStyle(1,0x000000);
            g.moveTo(0,0);
            g.lineTo(Math.random()*100,Math.random()*100);
*/
            field.world.Step(1.0/9.0, 1);
        }
        
        private function createBodys():void {
            createGround();
            for(var i:Number = 0; i<50; ++i){
                createBallBody(new b2Vec2(200,Math.floor(100+Math.random()*4-2)),10);
            }
        }
        
        private function createBallBody(position:b2Vec2,radius:Number):b2Body {
            var bodyDef:b2BodyDef = new b2BodyDef();
            bodyDef.position.Set(position.x,position.y);
            var body:b2Body = field.world.CreateBody(bodyDef);
            var shapeDef:b2CircleDef = new b2CircleDef();
            shapeDef.radius = radius;
            shapeDef.density = 1.0;
            shapeDef.restitution = 0.4;
            shapeDef.friction = 0.3;
            body.CreateShape(shapeDef);
            body.SetMassFromShapes();
            
            return body;
        }
        
        private function createGround():b2Body {
            var bodyDef:b2BodyDef = new b2BodyDef();
            bodyDef.position.Set(220,400);
            var body:b2Body = field.world.CreateBody(bodyDef);
            var shapeDef:b2PolygonDef = new b2PolygonDef();
            shapeDef.SetAsBox(200,30);
            shapeDef.friction = 0.8;
            body.CreateShape(shapeDef);
            
            return body;
        }
    }
}

import Box2D.Dynamics.*;
import Box2D.Collision.b2AABB;
import Box2D.Common.Math.b2Vec2;
import flash.display.*;

class MyWorld {
    private var worldAABB:b2AABB;
    public var world:b2World;
    public function MyWorld() {
        this.worldAABB = new b2AABB();
        this.worldAABB.lowerBound.Set(0,-300);
        this.worldAABB.upperBound.Set(500,500);
        var gravity:b2Vec2 = new b2Vec2(0,10.0);
        this.world = new b2World(worldAABB,gravity,true);
        
        
    }
}

class MyDrawer extends Sprite{
    private var drawTarget:Sprite;
    private var field:MyWorld;
    public function MyDrawer(drawTarget:Sprite,field:MyWorld) {
        this.drawTarget = this;
        this.field = field;
        setting();
    }
    
    private function setting():void {
        var debugDraw:b2DebugDraw = new b2DebugDraw();
        debugDraw.m_sprite = drawTarget;
        debugDraw.m_drawScale = 1.0;
        debugDraw.m_lineThickness = 1;
        debugDraw.m_drawFlags = b2DebugDraw.e_shapeBit;
        field.world.SetDebugDraw(debugDraw);
    }
}