I'm working on a simulation where I track the population as a float and adjust it based on food supply. I'm using this formula to update population over time:
```population += food / 2f * Time.deltaTime;```
However, I've been facing rounding issues because when I calculate the change in population, sometimes it returns a 0 instead of the expected value. For example, if the population goes from 1,000,000 to 1,000,001, I want it to show a change of 1, but due to rounding, it might not.
Should I convert the population to an int? If so, how would I manage the adjustments based on food supply? Is there a better way to handle time or any suggestions for solving these rounding issues?
2 Answers
It usually makes sense to keep your population as an integer since you can't have a fraction of a person. If you need to consider fractional changes for calculations, you could use a few different methods. One approach is to keep track of any fractional population changes and carry them over to the next update, ensuring you don't lose that information. Alternatively, you could keep the population as a float but only expose it as an integer when others access it by flooring the value. This way, you still handle precise calculations internally without affecting the visible population count.
Taking the ceiling of your population value could also work, as it rounds up any fractional growth, ensuring you don't miss out on population increases. Just be cautious with how your growth is calculated - if you have a very tiny deltaTime, you might not reach significant increments consistently, affecting your population accuracy.
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