function onUpdate() {
var movex = 0;
var movey = 0;
var k = '';
var f = null;
if (isGameOver) {
field.pitch = 0;
field.yaw = 0;
chart.movex = 0;
chart.movey = 0;
photons.fire = false;
if (keys.key === '\e') {
loop.enterPause();
}
return;
}
if (keys.left) {
--movex;
}
if (keys.right) {
++movex;
}
if (keys.up) {
--movey;
}
if (keys.down) {
++movey;
}
/* Only fire missiles if not in hyperspace or hyperwarp. */
if (!hyperwarp.engaged() && !hyperwarp.inHyperspace() &&
field.speed < 70.0) {
photons.fire = keys.fire;
} else {
photons.fire = false;
}
if (!chart.isShown() || hyperwarp.engaged()) {
field.yaw = movex;
field.pitch = -movey;
chart.movex = 0;
chart.movey = 0;
} else {
field.yaw = 0;
field.pitch = 0;
chart.movex = movex;
chart.movey = movey;
}
k = keys.key;
if (k !== '') {
if (typeof keytable[k] === 'function') {
keytable[k](k);
}
}
}
keytable['h'] = keytable['H'] = function () {
if (hyperwarp.engaged()) {
console.write('Hyperwarp aborted.');
engines.setSpeed(0);
} else {
console.write('Hyperwarp engines engaged.');
hyperwarp.engage();
}
};
function engineControl(k) {
if (hyperwarp.engaged()) {
console.write('Hyperwarp aborted.');
}
engines.setSpeed(parseInt(k));
}