/**
* @author Richard Davey
* @copyright 2018 Photon Storm Ltd.
* @license {@link https://github.com/photonstorm/phaser/blob/master/license.txt|MIT License}
*/
var Bounds = require('./lib/geometry/Bounds');
var Class = require('../../utils/Class');
var Composite = require('./lib/body/Composite');
var Constraint = require('./lib/constraint/Constraint');
var Detector = require('./lib/collision/Detector');
var GetFastValue = require('../../utils/object/GetFastValue');
var Merge = require('../../utils/object/Merge');
var Sleeping = require('./lib/core/Sleeping');
var Vector2 = require('../../math/Vector2');
var Vertices = require('./lib/geometry/Vertices');
/**
* @classdesc
* [description]
*
* @class PointerConstraint
* @memberOf Phaser.Physics.Matter
* @constructor
* @since 3.0.0
*
* @param {Phaser.Scene} scene - [description]
* @param {Phaser.Physics.Matter.World} world - [description]
* @param {object} options - [description]
*/
var PointerConstraint = new Class({
initialize:
function PointerConstraint (scene, world, options)
{
if (options === undefined) { options = {}; }
// Defaults
var defaults = {
label: 'Pointer Constraint',
pointA: { x: 0, y: 0 },
pointB: { x: 0, y: 0 },
damping: 0,
length: 0.01,
stiffness: 0.1,
angularStiffness: 1,
collisionFilter: {
category: 0x0001,
mask: 0xFFFFFFFF,
group: 0
}
};
/**
* [description]
*
* @name Phaser.Physics.Matter.PointerConstraint#scene
* @type {Phaser.Scene}
* @since 3.0.0
*/
this.scene = scene;
/**
* [description]
*
* @name Phaser.Physics.Matter.PointerConstraint#world
* @type {Phaser.Physics.Matter.World}
* @since 3.0.0
*/
this.world = world;
/**
* [description]
*
* @name Phaser.Physics.Matter.PointerConstraint#camera
* @type {Phaser.Cameras.Scene2D.Camera}
* @since 3.0.0
*/
var camera = GetFastValue(options, 'camera', null);
if (!camera)
{
this.camera = scene.sys.cameras.main;
}
else
{
this.camera = camera;
delete options.camera;
}
/**
* [description]
*
* @name Phaser.Physics.Matter.PointerConstraint#pointer
* @type {Phaser.Input.Pointer}
* @default null
* @since 3.0.0
*/
this.pointer = null;
/**
* [description]
*
* @name Phaser.Physics.Matter.PointerConstraint#active
* @type {boolean}
* @default true
* @since 3.0.0
*/
this.active = true;
/**
* The transformed position.
*
* @name Phaser.Physics.Matter.PointerConstraint#position
* @type {Phaser.Math.Vector2}
* @since 3.0.0
*/
this.position = new Vector2();
/**
* [description]
*
* @name Phaser.Physics.Matter.PointerConstraint#constraint
* @type {object}
* @since 3.0.0
*/
this.constraint = Constraint.create(Merge(options, defaults));
this.world.on('beforeupdate', this.update, this);
scene.sys.input.on('pointerdown', this.onDown, this);
scene.sys.input.on('pointerup', this.onUp, this);
},
/**
* [description]
*
* @method Phaser.Physics.Matter.PointerConstraint#onDown
* @since 3.0.0
*
* @param {Phaser.Input.Pointer} pointer - [description]
*/
onDown: function (pointer)
{
this.pointer = pointer;
},
/**
* [description]
*
* @method Phaser.Physics.Matter.PointerConstraint#onUp
* @since 3.0.0
*/
onUp: function ()
{
this.pointer = null;
},
/**
* [description]
*
* @method Phaser.Physics.Matter.PointerConstraint#getBodyPart
* @since 3.0.0
*
* @param {MatterJS.Body} body - [description]
* @param {Phaser.Math.Vector2} position - [description]
*
* @return {boolean} [description]
*/
getBodyPart: function (body, position)
{
var constraint = this.constraint;
var start = (body.parts.length > 1) ? 1 : 0;
for (var i = start; i < body.parts.length; i++)
{
var part = body.parts[i];
if (Vertices.contains(part.vertices, position))
{
constraint.bodyB = body;
constraint.pointA.x = position.x;
constraint.pointA.y = position.y;
constraint.pointB.x = position.x - body.position.x;
constraint.pointB.y = position.y - body.position.y;
constraint.angleB = body.angle;
Sleeping.set(body, false);
return true;
}
}
return false;
},
/**
* [description]
*
* @method Phaser.Physics.Matter.PointerConstraint#update
* @since 3.0.0
*/
update: function ()
{
if (!this.active)
{
return;
}
var pointer = this.pointer;
var constraint = this.constraint;
if (!pointer)
{
// Pointer is up / released
if (constraint.bodyB)
{
constraint.bodyB = null;
}
}
else
{
var pos = this.position;
this.camera.getWorldPoint(pointer.x, pointer.y, pos);
if (constraint.bodyB)
{
// Pointer is down and we have bodyB, so wake it up
Sleeping.set(constraint.bodyB, false);
constraint.pointA.x = pos.x;
constraint.pointA.y = pos.y;
}
else
{
var bodies = Composite.allBodies(this.world.localWorld);
// Pointer is down and no bodyB, so check if we've hit anything
for (var i = 0; i < bodies.length; i++)
{
var body = bodies[i];
if (!body.ignorePointer && Bounds.contains(body.bounds, pos) &&
Detector.canCollide(body.collisionFilter, constraint.collisionFilter))
{
if (this.getBodyPart(body, pos))
{
break;
}
}
}
}
}
},
/**
* [description]
*
* @method Phaser.Physics.Matter.PointerConstraint#destroy
* @since 3.0.0
*/
destroy: function ()
{
this.world.removeConstraint(this.constraint);
this.constraint = null;
this.world.off('beforeupdate', this.update);
this.scene.sys.input.off('pointerdown', this.onDown, this);
this.scene.sys.input.off('pointerup', this.onUp, this);
}
});
module.exports = PointerConstraint;
