import { Vec3 } from '../math/vec3.js';

/**

* @class

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

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

* @param {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).

* @property {Vec3} origin The starting point of the ray.

* @property {Vec3} direction The direction of the ray.

*/

class Ray {

constructor(origin = new Vec3(), direction = new Vec3(0, 0, -1)) {

this.origin = origin;

this.direction = direction;

}

/**

* @function

* @name Ray#set

* @description Sets origin and direction to the supplied vector values.

* @param {Vec3} origin - The starting point of the ray.

* @param {Vec3} direction - The direction of the ray.

* @returns {Ray} Self for chaining.

*/

set(origin, direction) {

this.origin.copy(origin);

this.direction.copy(direction);

return this;

}

}

export { Ray };