module.exports = ObjectCollisionMatrix;
/**
* Records what objects are colliding with each other
* @class ObjectCollisionMatrix
* @constructor
*/
function ObjectCollisionMatrix() {
/**
* The matrix storage
* @property matrix
* @type {Object}
*/
this.matrix = {};
}
/**
* @method get
* @param {Number} i
* @param {Number} j
* @return {Number}
*/
ObjectCollisionMatrix.prototype.get = function(i, j) {
i = i.id;
j = j.id;
if (j > i) {
var temp = j;
j = i;
i = temp;
}
return i+'-'+j in this.matrix;
};
/**
* @method set
* @param {Number} i
* @param {Number} j
* @param {Number} value
*/
ObjectCollisionMatrix.prototype.set = function(i, j, value) {
i = i.id;
j = j.id;
if (j > i) {
var temp = j;
j = i;
i = temp;
}
if (value) {
this.matrix[i+'-'+j] = true;
}
else {
delete this.matrix[i+'-'+j];
}
};
/**
* Empty the matrix
* @method reset
*/
ObjectCollisionMatrix.prototype.reset = function() {
this.matrix = {};
};
/**
* Set max number of objects
* @method setNumObjects
* @param {Number} n
*/
ObjectCollisionMatrix.prototype.setNumObjects = function(n) {
};