Creating my own flight physics?

Question

Hi. I'm trying to make some realistic flight physics.

First.. I'm trying to make the plane fly.

This is my aircraft: alt text

What would be my best approach on making flight physics?

This is my current script:

     int curr_Speed;
 
     float lift;
 
     // Use this for initialization
     void Start () {
     
     }
     
     // Update is called once per frame
     void Update () {
 
         curr_Speed = (int)(rigidbody.velocity.magnitude * 1 / 0.3f);
 
     }
 
     void FixedUpdate() {
 
         rigidbody.AddRelativeForce(transform.forward * 4.5f);
 
 
         }

This only make the plane move forward (of course). What would be my next step and where should I apply rotation forces?

Thanks in advance.

Andreas.

Answer 1

Probably u should try this script. . . .this is not really an advance script but just an example of where u can start

  //C# SCRIPT
  public float maxSpeed;            // Our maximum speed allowed.
  public float decAltSpeed;        //Decrease Altitude.
  public float incAltSpeed;        // Increase Altitude.
  public float curSpeed;            // Current Speed;
  public float applySpeed;        // How much force to apply (Forward).
  
  public float airBrakeForce;        // Breaks.
  
  private Rigidbody myRigid;        // Our Rigidbody.
  
  void Start(){
      myRigid = GetComponent<Rigidbody>();        // Gets the players Rigidbody.
  }
  
  void FixedUpdate(){
  
  curSpeed = myRigid.velocity.z;
  
  if(curSpeed >= maxSpeed){
      //If our speed maxes out to our maxSpeed we restrict our plane from going any faster.
      applySpeed = curSpeed;
  }
  
  
      if(Input.GetKey(KeyCode.W)){
          //Apply Accelleration
          myRigid.AddRelativeForce(Vector3.forward * applySpeed);
          if(curSpeed >=incAltSpeed){
              myRigid.AddRelativeForce(Vector3.up * AnyNumberYouWant);
          }
          
      }
      if(Input.GetKey(KeyCode.S)){
          //Apply BREAKS
          myRigid.AddRelativeForce(Vector3.back * airBrakeForce);
          if(curSpeed <= decAltSpeed){
              myRigid.AddRelativeForce(Vector3.down * AnyNumberYouWant);
          }
          }
          
      }
      
      
      void Update(){
          //NOT REALISTIC ROTATIONS
          
          //You may have to move the '-' sign to the other one (- means opposite) E.G. - Negative so I THINK -Vector.up is left. Could be wrong though.
          
          if(Input.GetKey(KeyCode.A)){
              transform.rotate(-Vector3.up * 15 * Time.deltaTime);
              
          }
          if(Input.GetKey(KeyCode.D)){
              transform.rotate(Vector3.up * 15 * Time.deltaTime);
              
          }
      }
      
  }

hope u can get a idea

Answer 2

Answer by theGugu · Mar 28, 2017 at 04:41 AM

If you want to do it well, you'll probably have to consider lift and downforce to the wings (depending on velocity and pressure) and variable gravity (depending on distance): g=G*Mearth/(radius+heightfromwater)^2 You should try implement windzones and high/low pressure zones

If you calculate all of this into separated vectors, you can finally sum all together and get the resulting force applied to the aircraft

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Creating my own flight physics?

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