calculation

[ALA96]

Excuse me Sir, I want to ask about this. What does these lines mean? How to get calculation for pitch and roll?

Thank you for your attention

// Update at 20Hz
var increment = 0;
setInterval(function() {
// Attitude update
attitude.setRoll(30Math.sin(increment/10));
attitude.setPitch(50Math.sin(increment/20));

// Heading update
heading.setHeading(increment);

// Private methods
function _setRoll(roll){
placeholder.each(function(){
$(this).find('div.instrument.attitude div.roll').css('transform', 'rotate('+roll+'deg)');
});
}

	function _setPitch(pitch){
		// alert(pitch);
		if(pitch>constants.pitch_bound){pitch = constants.pitch_bound;}
		else if(pitch<-constants.pitch_bound){pitch = -constants.pitch_bound;}
		placeholder.each(function(){
			$(this).find('div.instrument.attitude div.roll div.pitch').css('top', pitch*0.7 + '%');
		});
	}

	function _setHeading(heading){
		placeholder.each(function(){
			$(this).find('div.instrument.heading div.heading').css('transform', 'rotate(' + -heading + 'deg)');
		});	
	}

[finnbear]

I realize it's been 6 years but, if you store the orientation as a quaternion (e.g. THREE.Quaternion), you can use the following functions to find the pitch and roll:

function pitch(orientation: Quaternion): Number {
    let forward = orientation.multiply(new Vector3(0, 0, -1));
    let forward2d = new Vector2(Math.hypot(forward.x, forward.z), forward.y);
    return Math.atan2(forward2d.y, forward2d.x)
}

function roll(orientation: Quaternion): Number {
    return orientation.toEuler("YXZ")[2];
}

Note: you may have to convert the result from radians to degrees before passing it to this library.