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A class to create a pseudo-random sequence
Given a seed number, this class will produce a sequence of pseudo-random numbers. This would typically be used in applications like games.
In general, you should instantiate a KRandomSequence object and pass along your seed number in the constructor. From then on, simply call getDouble or getLong to obtain the next number in the sequence.
| KRandomSequence ( long lngSeed = 0 )
| KRandomSequence |
Creates a pseudo-random sequence based on the seed lngSeed.
If lngSeed is 0, the sequence is initialized with a value from kapp->random().
A Pseudo-random sequence is different for each seed but can be reproduced by starting the sequence with the same seed.
If you need a single value which needs to be unpredictable, you need to use kapp->random() instead.
Parameters:
| lngSeed | Seed to initialize the sequence with. |
| ~KRandomSequence ()
| ~KRandomSequence |
[virtual]
Standard destructor
| void setSeed ( long lngSeed = 1 )
| setSeed |
Restart the sequence based on lngSeed
| double getDouble ()
| getDouble |
Get the next number from the pseudo-random sequence
Returns: a psuedo-random double value between [0,1[
| unsigned long getLong (unsigned long max)
| getLong |
Get the next number from the pseudo-random sequence
Returns: a pseudo-random integer value between [0, max[ with 0 <= max < 1.000.000
| bool getBool ()
| getBool |
Get a boolean from the pseudo-random sequence
Returns: a boolean which is either true or false
| void randomize (QGList *list)
| randomize |
Put a list in random order
Returns: modifies the order of list