annotate src/orbit.c @ 18:1424868939a8

Indenting
author darius
date Wed, 24 Dec 1997 12:38:35 +0000
parents aa38447a4b21
children
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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 #include <stdio.h>
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21 #include <math.h>
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22 #include <sys/types.h>
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23 #include <sys/ipc.h>
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24 #include <sys/shm.h>
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25
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26 #include "defs.h"
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27 #include "struct.h"
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28 #include "data.h"
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29 #include "shmem.h"
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30
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31
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32 void newdock();
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33 extern void move_player();
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34
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35 static void
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36 deactivate_friendly_tractors()
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37 {
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38 int i;
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39 struct player *j;
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40 for (i = 0; i < MAXPLAYER; i++)
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41 {
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42 j = &players[i];
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43 if (i == me->p_no ||
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44 j->p_team != me->p_team ||
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45 j->p_tractor != me->p_no)
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46 continue;
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47 /* j is a teammate with a tractor on me */
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48 j->p_flags &= ~(PFTRACT | PFPRESS);
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49 }
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50 }
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51
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52 /*------------------------------VISIBLE PROCEDURES-------------------------*/
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53
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54 /*-----------------------------------ORBIT---------------------------------*/
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55 /*
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56 * This function is called when the player presses the orbit key. It check
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57 * to make sure the player can orbit or dock. The function first checks
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58 * through the list of players to see whether there is a dockable ship
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59 * nearby. If that fails, then the planets are checked. The orbit key acts
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60 * as a toggle for docking and undocking at ships.
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61 */
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62
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63 void
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64 orbit()
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65 {
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66 register int i; /* looping var */
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67 register struct planet *l; /* to point to planet being orbited */
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68 unsigned char dir; /* to hold course direction */
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69 int dx, dy; /* used to get distances */
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70
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71 if (me->p_flags & PFORBIT) /* if not orbiting then we do not */
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72 return; /* need to do this section of code */
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73 if (me->p_speed > ORBSPEED)
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74 { /* going to fast to orbit/dock? */
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75 warning("Helmsman: Captain, the maximum safe speed for docking or orbiting is warp 2!");
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76 return;
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77 } /* turn off flags */
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78 me->p_flags &= ~(PFORBIT | PFTRACT | PFPRESS |
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79 PFWARP | PFAFTER | PFWARPPREP | PFWPSUSPENDED);
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80 me->p_warptime = 0;
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81 if ((me->p_flags & PFDOCK) && (players[me->p_docked].p_speed > 4))
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82 {
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83 warning("It's unsafe to disengage from your base when it's moving faster then warp 4."); /* cannot disengage from
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84 * travelling */
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85 return; /* ships if they are going too fast */
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86 }
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87 else
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88 undock_player(me); /* make sure I'm not docked */
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89
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90 if (!(me->p_flags & PFPLLOCK) && /* if we aren't locked onto a planet */
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91 can_dock(me->p_ship))
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92 { /* and player can dock then */
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93 for (i = 0; i < MAXPLAYER; i++)
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94 { /* go through all players */
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95 if (me->p_no == i) /* and look for ships that */
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96 continue; /* allow docking */
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97 if (!allows_docking(players[i].p_ship))
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98 continue;
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99 if (!isAlive(&players[i]))/* disregard players not */
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100 continue; /* alive */
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101 if (!friendlyPlayer(&players[i])) /* cannot dock on enemy */
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102 continue; /* players */
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103 dx = ABS(players[i].p_x - me->p_x); /* get distance */
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104 dy = ABS(players[i].p_y - me->p_y);
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105 if (dx > DOCKDIST || dy > DOCKDIST) /* if too far away thenwe */
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106 continue; /* cannot dock here */
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107 newdock(i); /* find a port and dock */
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108
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109 deactivate_friendly_tractors();
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110
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111 me->p_flags &= ~(PFPLOCK | PFPLLOCK);
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112 return;
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113 }
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114 } /* not docking with a player try a planet */
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115 if (!(me->p_flags & PFPLOCK))
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116 { /* aren't locked onto a player */
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117 for (i = 0, l = &planets[i]; i < NUMPLANETS; i++, l++)
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118 {
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119 switch (PL_TYPE(*l))
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120 {
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121 case PLSTAR:
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122 case PLNEB:
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123 case PLBHOLE:
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124 case PLPULSAR:
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125 continue;
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126 }
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127
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128 dx = ABS(l->pl_x - me->p_x); /* go through all planets and */
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129 dy = ABS(l->pl_y - me->p_y); /* check their distance */
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130 if (dx > ENTORBDIST || dy > ENTORBDIST)
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131 continue; /* too far away? */
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132 if (dx * dx + dy * dy > ENTORBDIST * ENTORBDIST)
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133 continue;
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134
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135 if (!(me->p_team & planets[i].pl_owner) && /* can player orbit? */
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136 !(me->p_ship.s_nflags & SFNCANORBIT))
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137 {
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138 warning("Central Command regulations prohibits you from orbiting foreign planets");
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139 return;
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140 }
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141 if (!(me->p_team & planets[i].pl_owner) &&
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142 !status->tourn)
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143 {
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144 warning("No one is allowed to orbit alien planets outside of T-mode");
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145 return;
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146 }
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147 dir = (unsigned char) (int) (atan2((double) (me->p_x - l->pl_x),
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148 (double) (l->pl_y - me->p_y)) / 3.14159 * 128.);
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149 scout_planet(me->p_no, l->pl_no);
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150 #if 0
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151 l->pl_torbit |= me->p_team; /* place team in orbit */
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152 #endif
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153 me->p_orbitdir = drand48() < configvals->orbitdirprob;
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154 me->p_dir = dir + (me->p_orbitdir ? 64 : -64); /* get direction for
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155 * player */
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156 me->p_flags |= PFORBIT; /* set his orbiting flag */
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157
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158 deactivate_friendly_tractors();
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159
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160 move_player(me->p_no, (int) (l->pl_x + ORBDIST * Cos[dir]),
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161 (int) (l->pl_y + ORBDIST * Sin[dir]), 1);
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162
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163 me->p_speed = me->p_desspeed = 0;
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164 me->p_planet = l->pl_no; /* set the planet number */
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165 me->p_flags &= ~(PFPLOCK | PFPLLOCK);
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166 return;
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167 }
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168 }
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169 warning("Helmsman: Sensors read no valid targets in range to dock or orbit sir!");
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170 }
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171
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172
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173
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174 /*--------------------------------NEWDOCK--------------------------------*/
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175
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176
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177 void
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178 newdock(base_num)
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179 int base_num;
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180 {
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181 char buf[80]; /* to sprintf into */
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182 struct player *base = &players[base_num];
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183 int port_id, i;
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184 int numports;
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185 long distsq = 0; /* will be set by the first matching port */
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186 int angle;
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187
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188 if (!(base->p_flags & PFDOCKOK))
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189 { /* docking allowed? */
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190 sprintf(buf, "Starbase %s refusing us docking permission captain.",
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191 base->p_name);
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192 warning(buf); /* if not say so then */
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193 return; /* get out of here */
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194 }
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195 port_id = -1;
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196 numports = base->p_ship.s_numports;
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197
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198 for (i = 0; i < numports; i++)
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199 {
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200 long ds;
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201 int x, y;
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202 angle = (2 * i + 1) * 128 / numports;
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203
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204 if (base->p_port[i] != VACANT)
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205 continue;
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206
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207 x = base->p_x + DOCKDIST * Cos[angle];
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208 y = base->p_y + DOCKDIST * Sin[angle];
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209 ds = (me->p_x - x) * (me->p_x - x) + (me->p_y - y) * (me->p_y - y);
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210 if (port_id == -1 || ds < distsq)
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211 {
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212 port_id = i;
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213 distsq = ds;
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214 }
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215 }
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216
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217 if (port_id < 0)
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218 {
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219 sprintf(buf, "Base %s: Permission to dock denied, all ports currently occupied.", base->p_name);
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220 warning(buf); /* print message to tell */
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221 return;
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222 } /* player */
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223 dock_to(me, base_num, port_id);
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224
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225 sprintf(buf, "Helmsman: Docking manuever completed Captain. All moorings secured at port %d.", port_id);
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226 warning(buf); /* tell user he's docked */
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227 }
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228
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229 #ifdef HAVE_RAND48
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230
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231 double drand48();
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232
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233 #endif
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234
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235 /*------------END OF FILE--------*/