src/Random.cxx

   1 /*
   2  * Random.cxx
   3  * Daniel Nelson - 11/10/0
   4  *
   5  * Copyright (C) 2000  Daniel Nelson
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License
   9  * as published by the Free Software Foundation; either version 2
  10  * of the License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  20  *
  21  * Daniel Nelson - aluminumangel.org
  22  * 174 W. 18th Ave.
  23  * Columbus, OH  43210
  24  *
  25  * Handles all the random number tables.
  26  */
  27
  28 #include "Random.h"
  29
  30 #include <ctime>
  31 #include <cmath>
  32
  33 #include "Game.h"
  34
  35
  36 Angle Random::angle_table[GC_SIZE_RANDOM_ANGLE_TABLE];
  37 Angle Random::angle_death_spark_table[GC_SIZE_RANDOM_ANGLE_TABLE];
  38 Angle Random::angle_celebration_spark_1_table[GC_SIZE_RANDOM_ANGLE_TABLE];
  39 Angle Random::angle_celebration_spark_2_table[GC_SIZE_RANDOM_ANGLE_TABLE];
  40
  41 void Random::seed ( unsigned int seed )
  42 /*
  43  * Called by Communicator to seed the random numbers.
  44  */
  45 {
  46   srand(seed);
  47 }
  48
  49 unsigned int Random::generateSeed (   )
  50 /*
  51  * Called by Communicator if we're the server.  The result is used to seed our
  52  * random numbers as well as sent to the client for theirs.
  53  */
  54 {
  55   return (unsigned int) time(null);
  56 }
  57
  58 void Random::initialize (   )
  59 /*
  60  * Attack calls seed() before this.
  61  */
  62 {
  63   for (int n = GC_SIZE_RANDOM_ANGLE_TABLE; n--; ) {
  64     float angle = (2.0f * PI) * Random::number();
  65     angle_table[n].x = cos(angle);
  66     angle_table[n].y = sin(angle);
  67   }
  68
  69   for (int n = GC_SIZE_RANDOM_ANGLE_TABLE; n--; ) {
  70     float angle = (PI / 4.0f) + (PI / 2.0f) * Random::number();
  71     angle_death_spark_table[n].x = cos(angle);
  72     angle_death_spark_table[n].y = sin(angle);
  73   }
  74
  75   for (int n = GC_SIZE_RANDOM_ANGLE_TABLE; n--; ) {
  76     float angle = (3.0f * PI / 16.0f) + (PI / 8.0f) * Random::number();
  77     angle_celebration_spark_1_table[n].x = cos(angle);
  78     angle_celebration_spark_1_table[n].y = sin(angle);
  79   }
  80
  81   for (int n = GC_SIZE_RANDOM_ANGLE_TABLE; n--; ) {
  82     float angle = (7.0f * PI / 16.0f) + (PI / 8.0f) * Random::number();
  83     angle_celebration_spark_2_table[n].x = cos(angle);
  84     angle_celebration_spark_2_table[n].y = sin(angle);
  85   }
  86 }