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1 /*--------------------------------------------------------------------------
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2 NETREK II -- Paradise
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3
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4 Permission to use, copy, modify, and distribute this software and its
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5 documentation, or any derivative works thereof, for any NON-COMMERCIAL
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6 purpose and without fee is hereby granted, provided that this copyright
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7 notice appear in all copies. No representations are made about the
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8 suitability of this software for any purpose. This software is provided
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9 "as is" without express or implied warranty.
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10
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11 Xtrek Copyright 1986 Chris Guthrie
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12 Netrek (Xtrek II) Copyright 1989 Kevin P. Smith
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13 Scott Silvey
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14 Paradise II (Netrek II) Copyright 1993 Larry Denys
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15 Kurt Olsen
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16 Brandon Gillespie
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17 --------------------------------------------------------------------------*/
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18
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19 #include "config.h"
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20
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21 #include <math.h>
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22 #include <stdio.h>
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23
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24 #include "defs.h"
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25 #include "struct.h"
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26 #include "shmem.h"
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27 #include "planets.h"
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28
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29 /*
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30 * This file contains utility procedures useful when laying out the galaxy.
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31 *
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32 */
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33
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34 /* #define SLOWER */
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35
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36 int
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37 place_stars(first, count, border, minpad, maxpad,
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38 othercheck, ocount)
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39 struct planet *first;
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40 int count;
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41 int border, minpad, maxpad;
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42 struct planet *othercheck;
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43 int ocount;
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44 {
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45 int i;
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46 double x, y;
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47
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48 for (i = 0; i < count; i++)
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49 {
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50 int done, attempts;
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51 int j;
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52
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53 attempts = 0;
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54 done = 0;
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55 #ifndef SLOWER
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56 x = drand48() * (configvals->gwidth - 2 * border) + border;
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57 y = drand48() * (configvals->gwidth - 2 * border) + border;
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58 #endif
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59 do
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60 {
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61
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62 attempts++;
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63
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64 #ifdef SLOWER
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65 x = drand48() * (configvals->gwidth - 2 * border) + border;
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66 y = drand48() * (configvals->gwidth - 2 * border) + border;
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67 #else
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68 x = border + fmod(x + 3574 - border,
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69 (configvals->gwidth - 2.0 * border));
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70 y = border + fmod(y + 1034 - border,
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71 (configvals->gwidth - 2.0 * border));
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72 #endif
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73 done = 1;
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74 /* check to make sure we aren't too close to other stars */
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75 for (j = 0; j < ocount; j++)
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76 {
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77 double dist = hypot(x - othercheck[j].pl_x,
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78 y - othercheck[j].pl_y);
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79 if (dist < minpad || dist > maxpad)
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80 {
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81 done = 0;
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82 break;
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83 }
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84 }
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85 /*
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86 * check to make sure we're not too close to the current set of stars
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87 */
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88 if (done)
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89 for (j = 0; j < i; j++)
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90 {
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91 double dist = hypot(x - first[j].pl_x,
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92 y - first[j].pl_y);
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93 if (dist < minpad || dist > maxpad)
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94 {
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95 done = 0;
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96 break;
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97 }
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98 }
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99 } while (!done && attempts < 1000);
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100 if (!done)
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101 return 0;
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102
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103 first[i].pl_owner = NOBODY;
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104 first[i].pl_system = (&first[i] - planets) + 1;
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105 first[i].pl_flags |= PLSTAR;
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106 move_planet(&first[i] - planets, (int) x, (int) y, 0);
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107 first[i].pl_hinfo = ALLTEAM;/* all teams know its a star */
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108 for (j = 0; j < MAXTEAM + 1; j++)
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109 { /* go put in info for teams */
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110 first[i].pl_tinfo[j].owner = NOBODY; /* nobody owns it */
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111 first[i].pl_tinfo[j].armies = 0;
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112 first[i].pl_tinfo[j].flags = first[i].pl_flags;
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113 }
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114 }
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115 return 1;
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116 }
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117
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118 void
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119 zero_plflags(first, count)
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120 struct planet *first;
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121 int count;
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122 {
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123 int i;
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124 for (i = 0; i < count; i++)
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125 {
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126 first[i].pl_flags = 0;
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127 }
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128 }
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129
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130 void
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131 randomize_atmospheres(first, count, p1, p2, p3, p4)
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132 struct planet *first;
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133 int count;
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134 int p1, p2, p3, p4;
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135 {
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136 int i;
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137 int sum = p1 + p2 + p3 + p4;
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138 for (i = 0; i < count; i++)
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139 {
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140 int val;
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141 int atmosphere;
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142 val = lrand48() % sum;
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143 if ((val -= p1) < 0)
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144 atmosphere = PLATYPE1;
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145 else if ((val -= p2) < 0)
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146 atmosphere = PLATYPE2;
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147 else if ((val -= p3) < 0)
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148 atmosphere = PLATYPE3;
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149 else
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150 atmosphere = PLPOISON;
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151 first[i].pl_flags &= !PLATMASK;
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152 first[i].pl_flags |= atmosphere;
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153 }
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154 }
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155
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156 /*
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157 * special note.
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158 *
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159 * It looks like this function originally wanted to make all Dilithium planets
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160 * toxic, but the code was buggy and if an arable happened to be placed on
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161 * the same planet later, you would get an STND DA.
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162 *
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163 * I am loath to fix this bug, because it would noticably alter the galactic
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164 * mix. This must be brought before the PLC.
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165 *
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166 * -RF
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167 *
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168 */
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169 void
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170 randomize_resources(first, count, nm, nd, na)
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171 struct planet *first;
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172 int count;
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173 int nm, nd, na;
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174 {
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175 for (; count > 0; count--, first++)
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176 {
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177 int val;
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178
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179 val = lrand48() % count;
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180 if (val < nm)
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181 {
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182 nm--;
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183 first->pl_flags |= PLMETAL;
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184 if (!configvals->resource_bombing)
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185 first->pl_flags |= PLREPAIR;
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186 }
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187
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188 val = lrand48() % count;
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189 if (val < nd)
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190 {
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191 nd--;
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192 first->pl_flags |= PLDILYTH;
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193 first->pl_flags &= ~(PLATMASK | PLARABLE);
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194 first->pl_flags |= PLPOISON;
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195 if (!configvals->resource_bombing)
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196 first->pl_flags |= PLFUEL;
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197 }
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198
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199 val = lrand48() % count;
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200 if (val < na)
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201 {
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202 na--;
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203 first->pl_flags |= PLARABLE | PLATYPE1;
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204 if (!configvals->resource_bombing)
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205 first->pl_flags |= PLAGRI;
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206 }
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207 }
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208 }
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209
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210 static int
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211 count_planets_in_system(sysnum)
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212 int sysnum;
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213 {
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214 int rval = 0;
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215 int i;
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216
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217 for (i = 0; i < NUMPLANETS; i++)
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218 {
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219 if (PL_TYPE(planets[i]) == PLPLANET &&
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220 planets[i].pl_system == sysnum)
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221 rval++;
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222 }
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223 return rval;
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224 }
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225
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226 static int
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227 pick_metal_planet_from_system(sysnum, nplanets)
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228 int sysnum, nplanets;
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229 {
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230 int i;
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231
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232 for (i = 0; i < NUMPLANETS; i++)
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233 {
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234 if (PL_TYPE(planets[i]) == PLPLANET &&
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235 planets[i].pl_system == sysnum &&
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236 (planets[i].pl_flags & PLMETAL))
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237 {
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238 if (lrand48() % nplanets == 0)
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239 return i;
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240 nplanets--;
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241 }
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242 }
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243 return -1;
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244 }
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245
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246 static int
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247 pick_planet_from_system(sysnum, nplanets)
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248 int sysnum, nplanets;
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249 {
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250 int i;
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251
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252 if (nplanets < 0)
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253 nplanets = count_planets_in_system(sysnum);
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254
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255 for (i = 0; i < NUMPLANETS; i++)
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256 {
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257 if (PL_TYPE(planets[i]) == PLPLANET &&
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258 planets[i].pl_system == sysnum)
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259 {
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260 if (lrand48() % nplanets == 0)
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261 return i;
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262 nplanets--;
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263 }
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264 }
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265 return -1;
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266 }
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267
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268
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269 void
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270 justify_galaxy(numsystems)
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271 int numsystems;
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272 /*
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273 * Balances the galaxy to be "fair". Currently ensures that: -> One metal
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274 * planet exists within each system.
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275 */
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276 {
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277 int i, j;
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278 int *metalcount;
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279
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280 metalcount = malloc(sizeof(*metalcount) * (numsystems + 1));
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281
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282 for (i = 0; i <= numsystems; i++)
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283 metalcount[i] = 0;
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284
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285 for (i = 0; i < NUMPLANETS; i++)
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286 {
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287 switch (PL_TYPE(planets[i]))
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288 {
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289 case PLPLANET:
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290 {
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291 int system = planets[i].pl_system;
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292 if (system < 0 || system > numsystems)
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293 break;
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294 if (planets[i].pl_flags & PLMETAL)
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295 metalcount[system]++;
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296 }
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297 break;
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298 default:
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299 ;
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300 /* don't care about other stuff */
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301 }
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302 }
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303
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304 for (i = 1; i <= numsystems; i++)
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305 {
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306 if (metalcount[i] < 1)
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307 {
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308 int to, from;
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309 int randbase;
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310
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311 randbase = lrand48() % (numsystems + 1);
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312
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313 for (j = 0; j <= numsystems; j++)
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314 if (metalcount[(j + randbase) % (numsystems + 1)] > 1)
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315 break;
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316 if (j > numsystems)
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317 {
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318 fprintf(stderr, "error stealing metal planet. Too few!\n");
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319 return;
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320 }
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321 j = (j + randbase) % (numsystems + 1);
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322 to = pick_planet_from_system(i, -1);
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323 from = pick_metal_planet_from_system(j, metalcount[j]);
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324 planets[to].pl_flags |= PLMETAL;
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325 planets[from].pl_flags &= ~PLMETAL;
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326 if (!configvals->resource_bombing)
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327 {
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328 planets[to].pl_flags |= PLREPAIR;
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329 planets[from].pl_flags &= PLREPAIR;
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330 }
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331 metalcount[i]++;
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332 metalcount[j]--;
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333 }
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334 }
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335 free(metalcount);
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336 }
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