/**
* Copyright aobyrne ( http://wonderfl.net/user/aobyrne )
* MIT License ( http://www.opensource.org/licenses/mit-license.php )
* Downloaded from: http://wonderfl.net/c/8UsH
*/
// forked from twotree's flash on 2010-5-27
package
{
import Box2D.Collision.b2AABB;
import Box2D.Common.Math.b2Vec2;
import Box2D.Dynamics.b2Body;
import Box2D.Dynamics.b2DebugDraw;
import Box2D.Dynamics.b2World;
import Box2D.Dynamics.Joints.b2RevoluteJointDef;
import com.actionsnippet.qbox.QuickBox2D;
import com.actionsnippet.qbox.QuickObject;
import com.bit101.components.PushButton;
import flash.display.MovieClip;
import flash.events.Event;
[SWF(backgroundColor="0x414647")]
public class QuickBox2DInitializeWorld extends MovieClip
{
private var world:b2World;
private var scale:Number = 30;
private var quickBox2D:QuickBox2D;
public function QuickBox2DInitializeWorld()
{
var useQuickBox2D:Boolean = true;
if (!useQuickBox2D)
{
var worldAABB:b2AABB = new b2AABB();
worldAABB.lowerBound.Set(-100, -100);
worldAABB.upperBound.Set(stage.stageWidth + 100, stage.stageHeight + 100);
var gravity:b2Vec2 = new b2Vec2(0, 5);
world = new b2World(worldAABB, gravity, true);
var draw:b2DebugDraw = new b2DebugDraw();
draw.m_sprite = this;
draw.m_drawScale = scale;
draw.m_drawFlags = b2DebugDraw.e_shapeBit | b2DebugDraw.e_jointBit;
world.SetDebugDraw(draw);
}
else
{
quickBox2D = new QuickBox2D(this, { debug:true } );
quickBox2D.mouseDrag();
quickBox2D.gravity = new b2Vec2;
//quickBox2D.grid();
world = quickBox2D.w;
}
Shape.world = world;
Shape.scale = scale;
Shape.create( { shape:Shape.RECT, x:0, y:465, width:465, height:1 } );
var bodyB:b2Body = Shape.create( { shape:Shape.RECT, x:3*scale, y:3*scale, y:3*scale, width:2*scale, height:1*scale, density:0, restitution:0.6,angle:0.000001 } );
var bodyA:b2Body = Shape.create( { shape:Shape.RECT, x:6*scale, y:3*scale, width:2*scale, height:1*scale, density:10, restitution:0.8 ,groupIndex:-1,angle:0.000001} );
var bodyC:b2Body = Shape.create( { shape:Shape.RECT, x:3*scale, y:3*scale, y:3*scale, width:2*scale, height:1*scale, density:0, restitution:0.6 , angle:2} );
var bodyD:b2Body = Shape.create( { shape:Shape.RECT, x:6*scale, y:3*scale, width:2*scale, height:1*scale, density:10, restitution:0.8 ,groupIndex:-1} );
createJoint(bodyC,bodyD);
createJoint(bodyB,bodyA);
if (useQuickBox2D)
{
/*/
quickBox2D.start();
/*/
new PushButton(this, 0, 0, "step", onStep);
new PushButton(this, 110, 0, "start", onStart);
//*/
}
else
{
addEventListener(Event.ENTER_FRAME, onEnterFrame);
}
var a:QuickObject = quickBox2D.addBox( { x:3, y:3, y:3, width:2, height:1, density:0, angle:0. } );
var b:QuickObject = quickBox2D.addBox( { x:6, y:3, y:3, width:2, height:1, density:10, angle:0., groupIndex: -1 } );
//quickBox2D.addJoint( { type:QuickBox2D.REVOLUTE, 'a':a.body, 'b':b.body, x1:a.body.GetWorldCenter().x + 0.5, y1:a.body.GetWorldCenter().y,lowerAngle:-10/ 180*Math.PI,upperAngle : 50 / 180*Math.PI,enableLimit :true } )
quickBox2D.addJoint( { type:QuickBox2D.REVOLUTE, 'a':a.body, 'b':b.body,vecA:new b2Vec2(a.body.GetWorldCenter().x + 0.5, a.body.GetWorldCenter().y),lowerAngle:-10/ 180*Math.PI,upperAngle : 50 / 180*Math.PI,enableLimit :true } )
}
private function onStart(e:Event):void
{
quickBox2D.start();
}
private function onStep(e:Event):void
{
onEnterFrame(e);
}
private function createJoint(first:b2Body,second:b2Body):void
{
var joint:b2RevoluteJointDef = new b2RevoluteJointDef();
//joint.Initialize(bodyA, bodyB, new b2Vec2(bodyA.GetWorldCenter().x, bodyA.GetWorldCenter().y));
joint.Initialize(first, second, new b2Vec2(first.GetWorldCenter().x+0.5, first.GetWorldCenter().y));
joint.lowerAngle = -10 / (180/Math.PI);
joint.upperAngle = 50 / (180/Math.PI);
joint.enableLimit = true;
joint.motorSpeed = 4;
joint.userData = { skin:"none" };
//joint.collideConnected
trace( "joint.collideConnected : " + joint.collideConnected );
world.CreateJoint(joint);
}
private function onEnterFrame(event:Event):void
{
world.Step(1 / 60, 10);
}
}
}
import Box2D.Collision.Shapes.b2CircleDef;
import Box2D.Collision.Shapes.b2PolygonDef;
import Box2D.Collision.Shapes.b2ShapeDef;
import Box2D.Common.Math.b2Vec2;
import Box2D.Dynamics.b2Body;
import Box2D.Dynamics.b2BodyDef;
import Box2D.Dynamics.b2World;
class Shape
{
public static const CIRCLE:int = 0;
public static const RECT:int = 1;
public static var world:b2World;
public static var scale:Number;
public static function addVec2(body:b2Body, x:Number, y:Number):void
{
body.SetXForm(new b2Vec2(body.GetPosition().x + x / scale, body.GetPosition().y + y / scale), body.GetAngle());
}
public static function setVec2(body:b2Body, x:Number, y:Number):void
{
body.SetXForm(new b2Vec2(x / scale, y / scale), body.GetAngle());
}
public static function addAngle(body:b2Body, rotate:Number):void
{
body.SetXForm(body.GetPosition(), body.GetAngle() + rotate * Math.PI / 180);
}
public static function setAngle(body:b2Body, rotate:Number):void
{
body.SetXForm(body.GetPosition(), rotate * Math.PI / 180);
}
public static function create(params:Object):b2Body
{
var def:b2BodyDef = new b2BodyDef();
if (params.angle) def.angle = params.angle * Math.PI / 180;
var shape:b2ShapeDef;
if (params.shape == Shape.RECT)
{
//def.position.Set((params.x + params.width / 2) / scale, (params.y + params.height / 2) / scale);
def.position.Set(params.x / scale, params.y / scale);
def.angle = params.angle?params.angle:0;
shape = new b2PolygonDef();
b2PolygonDef(shape).SetAsBox(params.width / 2 / scale, params.height / 2 / scale);
}
else if (params.shape == Shape.CIRCLE)
{
def.position.Set(params.x / scale, params.y / scale);
shape = new b2CircleDef();
b2CircleDef(shape).radius = params.radius / scale;
}
shape.filter.groupIndex = params.groupIndex?params.groupIndex:shape.filter.groupIndex;
shape.density = params.density;
shape.restitution = params.restitution;
var body:b2Body = world.CreateBody(def);
//body.group
body.CreateShape(shape);
if (shape.density > 0) body.SetMassFromShapes();
return body;
}
}
