Unity3D - Change player input axes on trigger

Question

Hope someone can help me with this, it seems like it should be a simple problem but that only makes it more frustrating!

I have a simple game where you roll a ball around by applying force to the horizontal and vertical axes. What I want to happen is, on a trigger, the axes switch from say the X and Y, to the X and Z, changing the way the player controls without changing the input buttons... The script I use to move the player is below:

{
  float moveHorizontal = Input.GetAxis ("Horizontal");
  float moveVertical = Input.GetAxis ("Vertical");

  Vector3 movement = new Vector3 (moveHorizontal, 0.0f, moveVertical);
  rb.AddForce (movement * speed);
}

(Where rb is the player ball object) - I'm thinking I'm going to have to change the way the player is controlled as I can't any reference to a 3rd axis in the Input.GetAxis documentation... any help with this would be great!

Thanks!

Answer 1

How about something like this:

public class TriggerMovement : MonoBehaviour 
{
    float speed;

    enum eAxis
    {
        Normal = 0,
        Switched,

        MAX
    }

    Vector3[] horizontalAxes = new Vector3[(int)eAxis.MAX];
    Vector3[] verticalAxes = new Vector3[(int)eAxis.MAX];

    eAxis curAxis = eAxis.Normal;
    void Start()
    {
        //Setup all axes you want to use here ...
        horizontalAxes[0] = new Vector3(1f, 0f, 0f);
        horizontalAxes[1] = new Vector3(0f, 0f, 1f);

        verticalAxes[0] = new Vector3(0f, 1f, 0f);
        verticalAxes[1] = new Vector3(1f, 0f, 0f);
    }


    void doMovement(Rigidbody rb)
    {
        //Get Input
        float moveHorizontal = Input.GetAxis("Horizontal"); 
        float moveVertical = Input.GetAxis("Vertical");

        //Set input on appropriate axes
        Vector3 horizontalMovement = horizontalAxes[(int)curAxis] * moveHorizontal;
        Vector3 verticalMovement = verticalAxes[(int)curAxis] * moveVertical;

        //Get total movement
        Vector3 movement = horizontalMovement + verticalMovement;

        //Scale by speed
        rb.AddForce(movement * speed);
    }
}

If you define the axes you want to use up front then the movement method could make use of the currently selected axes and apply the moevement from the triggers to those axes. To switch the axes you would just need to change the curAxis enum.

I haven't run this code but believe it should do what you want. Any questions just ask :)