CODEWITHSUNDEEP
c#unity-game-engine
Kit
Kit

Reputation: 37

Counting Rotations

I'm trying to count the rotation that an object makes on the z axis when the player presses space, and I want to be able to reset it, so I made this code for it.

float lastRotation;
float amountRotated = 0;
void Start()
{
    lastRotation = transform.rotation.z;
}
void Update() {
    if (Input.GetKey(KeyCode.Space)) {
        amountRotated += Mathf.Abs(transform.rotation.z - lastRotation);
        lastRotation = transform.rotation.z;
        print(amountRotated);
    } else {
        amountRotated = 0f;
        lastRotation = transform.rotation.z;
    }
}

But when I run it and rotate the object wile pressing space, it gives me a number close to zero, like 0.012345, then it gives me some weird number, like 9.25E, then keeps giving me numbers like these over and over again. Any help would be much appreciated.

Upvotes: 0

Views: 94

Answers (1)

gbe
gbe

Reputation: 1007

We are not rotating the player, so the amountRotated will not increase. We should add a rotate function.

public float rotSpeed;
float lastRotation;
float amountRotated = 0;
void Start()
{
    lastRotation = transform.rotation.z;
}
void Update() {
    if (Input.GetKey(KeyCode.Space)) {
        transform.Rotate(transform.up * rotSpeed);
        amountRotated += Mathf.Abs(transform.rotation.z - lastRotation);
    } else {
        amountRotated = 0f;
    }
    lastRotation = transform.rotation.z;
}

This way, amountRotated will be increasing because we are changing the rotation. You set amountRotated to a - b, where a is the rotation, and b is the lastRotation, so if you didn’t rotate at all, a = b, and a - b = 0.

Upvotes: 1

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