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Random Numbers
[Math]
Functions for generating random numbers. More...
Functions | |
| float | getRandom (int a, int b) |
| Returns a random number based on parameters passed in.. | |
| int | getRandomSeed () |
| Get the current seed used by the random number generator. | |
| void | setRandomSeed (int seed=-1) |
| Set the current seed for the random number generator. | |
Detailed Description
Functions for generating random numbers.
Based on a seed, the random number generator produces a sequence of numbers. As a given seed will always produce the same sequence of numbers this can be used to generate re-producible sequences of apparently random numbers.
To set the seed, call setRandomSeed().
Function Documentation
| float getRandom | ( | int | a, | |
| int | b | |||
| ) |
Returns a random number based on parameters passed in..
If no parameters are passed in, getRandom() will return a float between 0.0 and 1.0. If one parameter is passed an integer between 0 and the passed in value will be returned. Two parameters will return an integer between the specified numbers.
- Parameters:
-
a If this is the only parameter, a number between 0 and a is returned. Elsewise represents the lower bound. b Upper bound on the random number. The random number will be <= b.
- Returns:
- A pseudo-random integer between a and b, between 0 and a, or a float between 0.0 and 1.1 depending on usage.
- Note:
- All parameters are optional.
- See also:
- setRandomSeed
| int getRandomSeed | ( | ) |
Get the current seed used by the random number generator.
- Returns:
- The current random number generator seed value.
| void setRandomSeed | ( | int | seed = -1 |
) |
Set the current seed for the random number generator.
Based on this seed, a repeatable sequence of numbers will be produced by getRandom().
- Parameters:
-
seed The seed with which to initialize the randon number generator with. The same seed will always leed tothe same sequence of pseudo-random numbers. If -1, the current timestamp will be used as the seed which is a good basis for randomization.