var elapsed_sensor = m_ctl.create_elapsed_sensor();
var delta_rotate = new Float32Array(4);
var rotate = 3;
var obj_rot = new Float32Array(4);
var target_rot = new Float32Array(4);

m_trans.get_translation(obj, obj_pos);
m_trans.get_translation(target, target_pos);

m_trans.get_rotation(obj, obj_rot);
m_trans.get_rotation(target, target_rot);

var main_cb = function(obj, id) {
    var elapsed = m_ctl.get_sensor_value(obj, id, 0);

    m_trans.get_rotation(target, target_rot);
    m_vec4.subtract(obj_rot, target_rot, delta_rotate);
    m_vec4.normalize(delta_rotate, delta_rotate);
    m_vec4.scale(delta_rotate, elapsed * rotate, delta_rotate);
    m_vec4.add(obj_rot, delta_rotate, obj_rot);
    m_trans.set_rotation_v(obj, obj_rot);
};

m_ctl.create_sensor_manifold(obj, 'HANDLE', m_ctl.CT_CONTINUOUS, [elapsed_sensor], null, main_cb);

"use strict"

// register the application module
b4w.register("test_project_main", function(exports, require) {

// import modules used by the app
var m_app       = require("app");
var m_cfg       = require("config");
var m_data      = require("data");
var m_preloader = require("preloader");
var m_ver       = require("version");
var m_scenes = require('scenes');
var m_version = b4w.require('version');
var m_fps = require("fps");
var m_ctl = require('controls');
var m_cont =  require('container');
var m_cam = require('camera');
var m_mouse = require('mouse');
var m_trans = require('transform');
var m_phys = require('physics');
var m_obj = require('objects');
var m_const = require('constraints');
var m_quat = require('quat');

// detect application mode
var DEBUG = (m_ver.type() == "DEBUG");

// automatically detect assets path
var APP_ASSETS_PATH = m_cfg.get_assets_path("test_project");

var _vec2_tmp = new Float32Array(2);

/**
 * export the method to initialize the app (called at the bottom of this file)
 */
exports.init = function() {
    m_app.init({
        canvas_container_id: "main_canvas_container",
        callback: init_cb,
        show_fps: DEBUG,
        console_verbose: DEBUG,
        autoresize: true
    });
}

/**
 * callback executed when the app is initialized 
 */
function init_cb(canvas_elem, success) {

    if (!success) {
        console.log("b4w init failure");
        return;
    }

    m_preloader.create_preloader();

    // ignore right-click on the canvas element
    canvas_elem.oncontextmenu = function(e) {
        e.preventDefault();
        e.stopPropagation();
        return false;
    };

    load();
}

/**
 * load the scene data
 */
function load() {
    m_data.load(APP_ASSETS_PATH + "test_project.json", load_cb, preloader_cb);
}

/**
 * update the app's preloader
 */
function preloader_cb(percentage) {
    m_preloader.update_preloader(percentage);
}

/**
 * callback executed when the scene data is loaded
 */
function load_cb(data_id, success) {

    if (!success) {
        console.log("b4w load failure");
        return;
    }

    m_app.enable_camera_controls();

    var cont = m_cont.get_container();
    cont.addEventListener("mousedown", main_canvas_down, false);
}

function main_canvas_down(e) {
    if (e.preventDefault) {
        e.preventDefault();
    }

    var x = m_mouse.get_coords_x(e);
    var y = m_mouse.get_coords_y(e);

    var obj = m_scenes.pick_object(x, y);
    

    if (obj) {
        var pos = m_trans.get_translation(obj);
        var cam = m_scenes.get_active_camera();

        switch (obj.name) {
            case 'Cube test':
                var pos = m_trans.get_translation(obj);

                m_cam.eye_setup(cam);
                m_cam.eye_setup(cam, {look_at: pos});
                setTimeout(function(){
                    m_cam.eye_setup(cam, {look_at: pos});
                }, 1000);
                
                break;

            case 'Cube Click':
                m_cam.get_camera_angles(cam, _vec2_tmp);

                var pos = m_trans.get_translation(obj);
                m_cam.target_setup(cam, {pivot: pos, dist_lim: {min: 1, max: 10}});

                break;
        }
    }
}
});

b4w.require("test_project_main").init();