How to create a score multiplier?

Question

I am a making an endless skiing game, and already have a scoring system, however i want to add a score multiplier based on the number of consecutive tricks done without touching the ground. here's my script so far:

public class tricksScore : MonoBehaviour
{
    private float flips = 0;
    private float deltaRotation = 0;
    private float currentRotation = 0;
    private float WindupRotation = 0;
    public static Rigidbody2D rigbod;
    public Text scores;
    private int trickscore;
    private int iflip;
    private int oldscore;
    private int incInScore;
    public float speed;
    private float counter;
    private int flipscore;
    private int rockDestroy;
    private bool grounded;
    private int multiplier = 1;
    // Collision2D coll;

    // Start is called before the first frame update
    void Start()
    {
        speed = GameObject.FindGameObjectWithTag("Player").GetComponent<PlayerController>().speed;
        scores = GameObject.Find("score").GetComponent<Text>();
        rigbod = GameObject.FindGameObjectWithTag("Player").GetComponent<Rigidbody2D>();
        grounded = GameObject.FindGameObjectWithTag("Player").GetComponent<PlayerController>().grounded;
    }

    // Update is called once per frame
    void Update()
    {
        rigbod.velocity = new Vector2(speed, rigbod.velocity.y);
        deltaRotation = currentRotation - rigbod.transform.eulerAngles.z;
        currentRotation = rigbod.transform.eulerAngles.z;
        if (deltaRotation >= 300) deltaRotation -= 360;
        if (deltaRotation <= -300) deltaRotation += 360;
        WindupRotation += (deltaRotation);
        flips = WindupRotation / 340;
        iflip = (int)flips;
        iflip = iflip * -1;
        flipscore = iflip * 10;
        trickscore = flipscore + rockDestroy;
        scores.text = "score " + (trickscore * multiplier);
        incInScore = trickscore - oldscore;
        if (incInScore >= 10)
        {
            oldscore = trickscore;
        }
        
        //speed += (Mathf.Round(incInScore)) / 100.0f;
      
        if (incInScore > 1 && incInScore <= 10)
        {
            speed = speed + 0.15f;
            counter += 3f;
        }
        if (incInScore > 10 && incInScore <= 20)
        {
            speed = speed + 0.25f;
            counter += 3f;
        }
        if (incInScore > 20 && incInScore <= 50)
        {
            speed = speed + 0.50f;
            counter += 3f;
        }
        if (incInScore > 50 && incInScore <= 100)
        {
            speed = speed + 0.75f;
            counter += 3f;
        }
        if (incInScore > 100 && incInScore <= 200)
        {
            speed = speed + 1f;
            counter += 3.5f;
        }
        if (incInScore > 200)
        {
            speed = speed + 2f;
            counter += 4f;
        }

        if (incInScore > 5 && grounded == false)
        {
            multiplier = multiplier + 1;
        } 
        else if (grounded == true)
        {
            multiplier = 1;
        }

        if (speed > 5.15f)
        {
            speed -= 0.05f * Time.deltaTime;
        } 
        else if (speed == 5.15f)
        {
            speed = 5.15f;
        }
         
        counter -= 1.0f * Time.deltaTime;
 
        if (counter < 0)
        {
            counter = 0;
        }

        if (incInScore >= 10)
        {
            incInScore = 0;             
        }

        if (incInScore < 0)
        {
            incInScore = incInScore * -1;
        }
    }

    private void OnCollisionEnter2D(Collision2D coll)
    {
        //counter = GameObject.FindGameObjectWithTag("Player").GetComponent<tricksScore>().counter;
        if (counter > 0)
        {
            if (coll.collider.tag == "rock")
            {
                Destroy(coll.gameObject);
                speed = speed + 0.15f;
                rockDestroy = rockDestroy + 5;
                counter = counter + 2f;
            }            
        }
    }
}

I know the scripts dirty, but hopefully its still comprehensible for you all. thanks in advance for the help.

Answer 1

Your ground boolean is only set in start, so it will almost always be false. Add the check statement in the update function, as when you set a variable with this property, it will only take the value at that time, it will not automatically update.