diff options
Diffstat (limited to 'nGenEx/Random.cpp')
-rw-r--r-- | nGenEx/Random.cpp | 172 |
1 files changed, 0 insertions, 172 deletions
diff --git a/nGenEx/Random.cpp b/nGenEx/Random.cpp deleted file mode 100644 index 57752e9..0000000 --- a/nGenEx/Random.cpp +++ /dev/null @@ -1,172 +0,0 @@ -/* Starshatter OpenSource Distribution - Copyright (c) 1997-2004, Destroyer Studios LLC. - All Rights Reserved. - - Redistribution and use in source and binary forms, with or without - modification, are permitted provided that the following conditions are met: - - * Redistributions of source code must retain the above copyright notice, - this list of conditions and the following disclaimer. - * Redistributions in binary form must reproduce the above copyright notice, - this list of conditions and the following disclaimer in the documentation - and/or other materials provided with the distribution. - * Neither the name "Destroyer Studios" nor the names of its contributors - may be used to endorse or promote products derived from this software - without specific prior written permission. - - THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" - AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE - LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR - CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF - SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS - INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN - CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - POSSIBILITY OF SUCH DAMAGE. - - SUBSYSTEM: nGenEx.lib - FILE: Random.cpp - AUTHOR: John DiCamillo - - - OVERVIEW - ======== - Utility functions for generating random numbers and locations. -*/ - -#include "MemDebug.h" -#include "Random.h" - -// +----------------------------------------------------------------------+ - -void RandomInit() -{ - srand(timeGetTime()); -} - -// +----------------------------------------------------------------------+ - -Point RandomDirection() -{ - Point p = Point(rand() - 16384, rand() - 16384, 0); - p.Normalize(); - return p; -} - -// +----------------------------------------------------------------------+ - -Point RandomPoint() -{ - Point p = Point(rand() - 16384, rand() - 16384, 0); - p.Normalize(); - p *= 15e3 + rand()/3; - return p; -} - -// +----------------------------------------------------------------------+ - -Vec3 RandomVector(double radius) -{ - Vec3 v = Vec3(rand() - 16384, rand() - 16384, rand() - 16384); - v.Normalize(); - - if (radius > 0) - v *= (float) radius; - else - v *= (float) Random(radius/3, radius); - - return v; -} - -// +----------------------------------------------------------------------+ - -double Random(double min, double max) -{ - double delta = max - min; - double r = delta * rand() / 32768.0; - - return min + r; -} - -// +----------------------------------------------------------------------+ - -int RandomIndex() -{ - static int index = 0; - static int table[16] = { 0, 9, 4, 7, 14, 11, 2, 12, 1, 5, 13, 8, 6, 10, 3, 15 }; - - int r = 1 + ((rand() & 0x0700) >> 8); - index += r; - if (index > 1e7) index = 0; - return table[index % 16]; -} - -// +----------------------------------------------------------------------+ - -bool RandomChance(int wins, int tries) -{ - double fraction = 256.0 * wins / tries; - double r = (rand() >> 4) & 0xFF; - - return r < fraction; -} - -// +----------------------------------------------------------------------+ - -int RandomSequence(int current, int range) -{ - if (range > 1) { - int step = (int) Random(1, range-1); - return (current + step) % range; - } - - return current; -} - -// +----------------------------------------------------------------------+ - -int RandomShuffle(int count) -{ - static int set_size = -1; - static BYTE set[256]; - static int index = -1; - - if (count < 0 || count > 250) - return 0; - - if (set_size != count) { - set_size = count; - index = -1; - } - - // need to reshuffle - if (index < 0 || index > set_size-1) { - // set up the deck - int tmp[256]; - for (int i = 0; i < 256; i++) - tmp[i] = i; - - // shuffle the cards - for (int i = 0; i < set_size; i++) { - int n = (int) Random(0, set_size); - int tries = set_size; - while (tmp[n] < 0 && tries--) { - n = (n+1) % set_size; - } - - if (tmp[n] >= 0) { - set[i] = tmp[n]; - tmp[n] = -1; - } - else { - set[i] = 0; - } - } - - index = 0; - } - - return set[index++]; -} |