Sandbox::https://github.com/selectgithub/engine/blob/bindbuffer/src/shape/ray.js

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Object.assign(pc, function () {

/**

* @constructor

* @name pc.Ray

* @classdesc An infinite ray

* @description Creates a new infinite ray starting at a given origin and pointing in a given direction.

* @example

* // Create a new ray starting at the position of this entity and pointing down

* // the entity's negative Z axis

* var ray = new pc.Ray(this.entity.getPosition(), this.entity.forward);

* @param {pc.Vec3} [origin] The starting point of the ray. The constructor takes a reference of this parameter.

* Defaults to the origin (0, 0, 0).

* @param {pc.Vec3} [direction] The direction of the ray. The constructor takes a reference of this parameter.

* Defaults to a direction down the world negative Z axis (0, 0, -1).

var Ray = function Ray(origin, direction) {

this.origin = origin || new pc.Vec3(0, 0, 0);

this.direction = direction || new pc.Vec3(0, 0, -1);

};

return {

Ray: Ray

};

}());