Displayrand: Difference between revisions
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Helixhorned (talk | contribs) mention that displayrand uses the "system" PRNG (which is libc rand() with potential truncation now, but that's an implementation detail) |
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'''displayrand''' <gamevar><br> | '''displayrand''' <gamevar><br> | ||
generates a random number between 0 and a | generates a random number between 0 and a certain maximum value (using the system PRNG in a not further specified fashion) and assigns it to <gamevar>. With EDuke32 revisions prior to r2105, the maximum values may differ between EDuke32 builds produced with the GCC and MSVC compilers, and/or operating systems. Revisions r2105 and up always generate numbers from 0 to 32767 (inclusive). | ||
'''displayrandvar''' <gamevar> <maxvalue_constant><br> | '''displayrandvar''' <gamevar> <maxvalue_constant><br> | ||
'''displayrandvarvar''' <gamevar> <maxvalue_gamevar> | '''displayrandvarvar''' <gamevar> <maxvalue_gamevar> | ||
The '''displayrandvar''' commands limit the number to be between 0 and <maxvalue>. | The '''displayrandvar''' commands limit the number to be between 0 and <maxvalue>, inclusive. | ||
'''displayrandvarvar''' takes a [[gamevar]] rather than a constant or a [[define]]d label for <maxvalue>. | '''displayrandvarvar''' takes a [[gamevar]] rather than a constant or a [[define]]d label for <maxvalue>. | ||
Since this function is sync safe, it can be used in unsynchronized code. | |||
See [[randomseed]]. | See [[randomseed]]. | ||
Latest revision as of 11:52, 21 March 2012
displayrand <gamevar>
generates a random number between 0 and a certain maximum value (using the system PRNG in a not further specified fashion) and assigns it to <gamevar>. With EDuke32 revisions prior to r2105, the maximum values may differ between EDuke32 builds produced with the GCC and MSVC compilers, and/or operating systems. Revisions r2105 and up always generate numbers from 0 to 32767 (inclusive).
displayrandvar <gamevar> <maxvalue_constant>
displayrandvarvar <gamevar> <maxvalue_gamevar>
The displayrandvar commands limit the number to be between 0 and <maxvalue>, inclusive.
displayrandvarvar takes a gamevar rather than a constant or a defined label for <maxvalue>.
Since this function is sync safe, it can be used in unsynchronized code.
See randomseed.