OK, I’ve been using the code below for space-flight. Let me be clear - everything does work.
The problem I am having is smoothness. Despite the many options that can be configured in this script, I cannot make yaw or pitch (among others) rotate smoothly at all. Translations work fine, its just rotations that are skippy.
I know that the scene isn’t too large, since I do not have any smoothness issues when using a separate mouse script. Pitch and yaw via mouse are smooth like butter - it is JUST the script below.
Here the the code (found on Unity3d’s forums), which I have slightly modified (due to issues encountered). I would be very grateful for any solution.
Thanks
/* This is identical to the Flight Sim script, I just optimized it for realistic space flight
In space there is no gravity or lift, and no need to bank into a turn.
*/
// Componants of the flyer
var flyer : GameObject;
// Various control variables. These mostly control realism settings, change as you see fit.
var throttleDelta : float=1; // This defines how fast the throttle value changes
var accelerateConst: float = 10;
var decelerateConst: float = 0;
var smoothRotation : float = 3.5;
var speedConst : int = 250;
var throttleConst = 30;
var maxSpeed : float = 100;
var liftConst : float; // Another arbitrary constant, change it as you see fit.
var dragConst : float; // Note that this is NOT the same as the rigidbody drag...
var gravityConst = 9.8; // An arbitrary gravity constant, there is no particular reason it has to be 9.8...
// Rotation Variables, these change how your plane turns.
var lockedConst : boolean; // If this is checked, it locks pitch roll and yaw const to the var rotationConst.
var rotationConst : int = 10;
var pitchConst = 20;
var rollConst = 20;
var yawConst = 20;
var pitchDelta : float = 1.05;
var rollDelta : float = 1.05;
var yawDelta : float = 1.05;
// Private variables that dont need to clutter the inspector panel.
private var trueSmooth : float;
private var truePitch : float;
private var trueRoll : float;
private var trueYaw : float;
// Airplane Aerodynamics - don't alter these... Anything that is preceded by "true" is directly plugged into a movement or rotation line.
private var thrust : float;
private var trueLift : float;
private var trueThrust : float;
private var trueDrag : float;
private var trueGrav : float;
// Let the games begin!
function Start ()
{
flyer.rigidbody.drag = 1;
if (lockedConst == true)
{
pitchConst = rotationConst;
rollConst = rotationConst;
yawConst = rotationConst;
Screen.showCursor = false;
}
}
function Update ()
{
// * * This section of code handles the plane's rotation.
var pitch = -Input.GetAxis ("Pitch") * pitchConst;
var roll = Input.GetAxis ("Roll") * rollConst;
var yaw = -Input.GetAxis ("Yaw") * yawConst;
pitch *= pitchDelta * Time.deltaTime;
roll *= -rollDelta * Time.deltaTime;
yaw *= yawDelta * Time.deltaTime;
// Smothing Rotations...
trueSmooth = Mathf.Lerp (trueSmooth, smoothRotation, 5* Time.deltaTime);
truePitch = Mathf.Lerp (truePitch, pitch, trueSmooth * Time.deltaTime);
trueRoll = Mathf.Lerp (trueRoll, roll, trueSmooth * Time.deltaTime);
trueYaw = Mathf.Lerp (trueYaw, yaw, trueSmooth * Time.deltaTime);
// * * This next block handles the thrust and drag.
// This block sets the value of the joystick throttle ( float value between 0 and 1)
var throttle = (-(Input.GetAxis ("Throttle"))+1)/2 * throttleConst;
throttle *= throttleDelta * Time.deltaTime;
if ( throttle >= trueThrust)
{
trueThrust = Mathf.SmoothStep (trueThrust, throttle, accelerateConst * Time.deltaTime);
}
if (throttle < trueThrust)
{
trueThrust = Mathf.Lerp (trueThrust, throttle, decelerateConst * Time.deltaTime);
}
var speed : float = 10.031;
var turboSpeed : float = 27.095;
// Forward/Backward + turbo.
if (Input.GetAxis("ForwardBackward")){ // && Input.GetAxis("Turbo")) {
var translationZ = Input.GetAxis("ForwardBackward");
transform.Translate(0,0,translationZ * speed);
rigidbody.AddRelativeForce (Vector3(0,0,translationZ) * speed);
}
// Move up/down + Turbo
if (Input.GetAxis("Vertical")) { // && Input.GetAxis("Turbo")) {
var translationY = Input.GetAxis("Vertical");
transform.Translate(0,translationY,0 * speed);
rigidbody.AddRelativeForce (Vector3(0,translationY,0) * speed);
}
// This is a airbrake, this increases drag, lowering your speed
if (Input.GetButtonDown ("Airbrake"))
{
// Do such
}
// * * Now we are applying lift and gravity to airplane.
} // End function Update( );
// Now we apply what we calculated...
function FixedUpdate ()
{
// Seperated addRelativeForce so we have better controll over when we want them to run.
if (trueThrust <= maxSpeed && (Input.GetButton ("Throttle")))
{
// Horizontal Force
flyer.rigidbody.AddRelativeForce (0,0,trueThrust*speedConst);
}
flyer.rigidbody.AddRelativeForce (0,trueLift,0);
transform.Rotate (truePitch,-trueYaw,trueRoll);
}
// End function FixedUpdateUpdate( );