RPG Damage Calculations?

Question

I am making a small RPG using Jcreator.

I give whatever character you pick damage at the start, we will take the Swordsman as an example.

I gave him 10 Damage and for the hitting damage I made the int Hit.

My problem is that this random number is not working well for damage as it is giving me damage under the actual attack range.

Hit = 1 + (int) ((Math.random() * (Damage - 1)) +1);

I can't comprehend what you're asking here... random() * Damage will, by definition, result in a value less than Damage. — Yeraze, Sep 06 '14 at 02:25
Do you want 10 to be the minimum damage, and have a chance to get higher? — Shadow, Sep 06 '14 at 02:26
No 10 is the average damage,I Want 5 more and 5 less,I Havent programmed in a while so im kind of shaky — user3670236, Sep 06 '14 at 02:29
@user3670236 To clarify, you have `int` `Damage` equal to `10`, and you want `Hit` to be within the range of `5 - 15`; do you want the range in general to be from `Damage/2` to `3 * Damage/2`? Or do you want the range to be from `Damage - 5` to `Damage + 5`? Like, if `Damage` was 20, would you want the range to be `10 - 30` or `15 - 25`? — Nick Meyer, Sep 06 '14 at 02:34
possible duplicate of [Generating random integers in a range with Java](http://stackoverflow.com/questions/363681/generating-random-integers-in-a-range-with-java) — Nick Meyer, Sep 06 '14 at 02:39
Thank you for all the help guys,i understand random number generators a bit better now ^^ — user3670236, Sep 06 '14 at 02:47

score 1 · Accepted Answer · answered Sep 06 '14 at 02:36

1

You need to always know the bounds of your random number generator.

In pseudocode, to generate a number from a random space with a minimum and maximum,

Result = Minimum + (Maximum - Minimum) * (Random() - RandMin) / (RandMax - RandMin)

answered Sep 06 '14 at 02:36

Gutblender

score 1 · Answer 2 · answered Sep 06 '14 at 02:37

1

Try this:

hit = (int)(Math.random() * range) + min;

where range = the max value you want minus the min value you want, i.e.,

int range = (max - min) + 1;

answered Sep 06 '14 at 02:37

user1790252

score 0 · Answer 3 · answered Sep 06 '14 at 02:35

Something like the following should work, and give you a number in the range of 5 above or below your damage:

randomNum = Damage-5 + (int)(Math.random()*Damage+1);

I tested it and it seems to have worked for me, didn't get a number below 5 or greater than 15

3 Answers3