koobas.hobune.stream
Modulus with float
Im trying to do a coroutine that sets the character to hurt mode for a persiod. During this period i want it to flash. Im not familiar with modulus but i tried to use it to flip the sprite renderer every 10 or so cycles. But i get really weird values, is it cause its a float? How should i do this in unity?
public IEnumerator Hurt_cr (float sec, Vector2 attackPosition, float force)
{
isHurt = true;
AddForceAtPosition (attackPosition, force);
SpriteRenderer sprite = GetComponent< SpriteRenderer> ();
float t = Time.deltaTime;
while (t < sec) {
if ((t % 10) == 0) {
print ("sprite on : " + sprite.enabled);
sprite.enabled = !sprite.enabled;
}
yield return null;
t += Time.deltaTime;
}
isHurt = false;
}
Modulus using floats can be achieved using Mathf.Repeat. Alternatively you can try rounding the number first, or flooring it, depending on the situation.
Sometimes, modulus won't work effectively with time and float... especially when your script is not on your default/start Scene and done some Application.LoadLevel(); or using UnityEngine.SceneManagement; SceneManager.LoadScene(); in game-play. Weird enough I have experience that...
Here what I suggest instead, if i make it right:
private int i; //declared private i variable...
void Start ()
{
i = 0; //initiate 'i' to zero...
/* or initiate 'i' to one? if you want to wait/delay for 10 sec to apply your function */
}
...
/*...Your codes here...*/
...
while (t < sec) { //'t' less than 'sec', this means the duration?
/* commented out...
if ((t % 10) == 0) { //As what I experience, sometimes modulus don't work well when dealing with floats (especially run-time), but works perfectly with int...
} */
if (t >= 10 * i) { //use this line instead, if 't' is equal or slight more than 10: it become true, if it succeed, then 'i++;' apply to multiply the 10 for another 10 seconds...
print ("sprite on : " + sprite.enabled);
sprite.enabled = !sprite.enabled;
i++;
}
yield return null;
t += Time.deltaTime;
}
...
I got a problem with the modulo of two small float values. The Mathf.Repeat function was not viable for me, so i had to find an other solution. Here is my solution:
moduloResult = smallFloatA % smallFloatB;
doesn't work for me. But it should be the same as this:
moduloResult = smallFloatA / smallFloatB - (int)(smallFloatA / smallFloatB);
