PhysicsScene

This class is made up to the native b2World class. It manages basic world properties and functions.

Properties

• autoClearForces : Boolean
  Flag to control automatic clearing of forces after each time step. By default it is set to true.
• clearForces
  Manually clear the force buffer on all bodies. By default, forces are cleared automatically after each call to Step.
• native : b2World
  Instance of native b2World.
• scale : Float
  Value represent scale of box2d world against screen resolution.
• world : b2World
  Physics world, b2World native instance.

Methods

• addCircleBody(image, bodyTypeSym, density, friction, bounce, radius) : PhysicsBody
  Add circle Body.
• addPolygonBody(image, bodyTypeSym, density, friction, bounce, width, height) : PhysicsBody
  Add polygon Body.
• create(gx, gy,options = {}) : PhysicsScene
  Factory to create object.
• createDistanceJoint( bodyA, bodyB, anchorAx, anchorAy, anchorBx, anchorBy, jointDef, collideConnected) : b2DistanceJoint
  A mouse joint is used to make a point on a body track a specified world point.
• createFrictionJoint(bodyA, bodyB, x, y, jointDef, collideConnected) : b2FrictionJoint
  The friction joint is used for top-down friction. The joint provides 2D translational friction and angular friction.
• createGearJoint(bodyA, bodyB, joint1, joint2, ratio, collideConnected) : b2GearJoint
  If you want to create a sophisticated mechanical contraption you might want to use gears. Gear joint connects two other types of joints and move them with set ratio.
• createLineJoint(bodyA, bodyB, anchorX, anchorY , axisX, axisY, jointDef , collideConnected) : b2LineJoint
  This joint provides two degrees of freedom: translation along an axis fixed in body1 and rotation in the plane.
• createMouseJoint(bodyA, bodyB, jointDef, collideConnected) : b2MouseJoint
  A mouse joint is used to make a point on a body track a specified world point.
• createPrismaticJoint(bodyA, bodyB, anchorX, anchorY , axisX, axisY, referenceAngle, jointDef, collideConnected) : b2PrismaticJoint
  A prismatic joint allows for relative translation of two bodies along a specified axis.
• createPulleyJoint( bodyA, bodyB, groundAnchorAX, groundAnchorAY, groundAnchorBX, groundAnchorBY, anchorAX, anchorAY, anchorBX, anchorBY, ratio , collideConnected ) : b2PulleyJoint
  The pulley joint is connected to two bodies and two fixed ground points.
• createRevoluteJoint(bodyA, bodyB, x, y, jointDef, collideConnected) : b2RevoluteJoint
  A mouse joint is used to make a point on a body track a specified world point.
• createWeldJoint( bodyA, bodyB, anchorX, anchorY, collideConnected ) : b2WeldJoint
  A weld joint essentially glues two bodies together. It may distort somewhat because the island constraint solver is approximate.
• destroyBody(body)
  Destroy body and remove from bodies array.
• destroyJoint(joint) : b2WeldJoint
  Destroy Joint.
• doDebugDraw(canvas)
  Draw physics scene, in debug mode
• draw(canvas)
  Draw physics scene
• getBody(body) : PhysicsBody
  Get body from bodies array
• getBodyCount() : Integer
  Get the number of bodies.
• getContactCount() : Integer
  Get the number of contacts (each may have 0 or more contact points).
• getGravity() : Multivalue
  Get the global gravity.
• getJointCount() : Integer
  Get the number of joints.
• getProxyCount() : Integer
  Get the number of broad-phase proxies.
• setContinuousPhysics(flag)
  Enable/disable continuous physics. For testing purposes.
• setGravity(gx, gy) : Multivalue
  Set the global gravity
• setWarmStarting(flag)
  Enable/disable warm starting. For testing purposes.
• step(timeStep = 1.0/40.0, velocityIterations = 4, positionIterations = 8)
  Take a time step. This performs collision detection, integration, and constraint solution.

Events

• onBeginContact : Function
  Event to be called, when two bodies collide.
• onEndContact : Function
  Event to be called, when contact ends.