/**
 * Copyright (C) 2014-2016 Triumph LLC
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
"use strict";

/**
 * {@link https://www.blend4web.com/doc/en/particles.html|Particle system} API. Please note that particle emission itself is controlled by the {@link module:animation} module.
 * @module particles
 */
b4w.module["particles"] = function(exports, require) {

var m_particles = require("__particles");
var m_print     = require("__print");

/**
 * Set particles size.
 * @method module:particles.set_size
 * @param {Object3D} obj Emitter object.
 * @param {String} psys_name Particles system name.
 * @param {Number} size Particles size.
 */
exports.set_size = function(obj, psys_name, size) {
    if (!m_particles.obj_has_particles(obj)) {
        m_print.error("\"",obj.name, "\" has no particle systems");
        return;
    }
    m_particles.set_size(obj, psys_name, size);
}


/**
 * Set particles normal factor.
 * @method module:particles.set_normal_factor
 * @param {Object3D} obj Emitter object.
 * @param {String} psys_name Particles system name.
 * @param {Number} nfactor Particles normal factor.
 */
exports.set_normal_factor = function(obj, psys_name, nfactor) {
    if (!m_particles.obj_has_particles(obj)) {
        m_print.error("\"",obj.name, "\" has no particle systems");
        return;
    }
    m_particles.set_normal_factor(obj, psys_name, nfactor);
}

/**
 * Set particles number factor.
 * @method module:particles.set_factor
 * @param {Object3D} obj Emitter object.
 * @param {String} psys_name Particles system name.
 * @param {Number} factor Particles num factor.
 */
exports.set_factor = function(obj, psys_name, factor) {
    if (!m_particles.obj_has_particles(obj)) {
        m_print.error("\"",obj.name, "\" has no particle systems");
        return;
    }
    factor = Math.min(factor, 1);
    factor = Math.max(factor, 0);

    m_particles.set_factor(obj, psys_name, factor);
}

}