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8
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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 <stdio.h>
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22 #include <malloc.h>
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23 #include <string.h>
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24 #include <sys/types.h>
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25 #include <sys/time.h>
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26 #include <signal.h>
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27 #include <setjmp.h>
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28 #include <sys/file.h>
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29 #include <math.h>
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30 #include <sys/ipc.h>
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31 #include <sys/shm.h>
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32 #include <errno.h>
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33 #include <pwd.h>
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34 #include <ctype.h>
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35 #include "defs.h"
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36 #include "struct.h"
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37 #include "data.h"
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38
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39 extern void (*r_signal()) ();
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40
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41 extern struct planet *planets;
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42
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43 #define COS(x) ((x) >= 0.0 ? Cosine[(int)(x)] : Cosine[(int)(-(x))])
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44 #define SIN(x) ((x) >= 0.0 ? Sine[(int)(x)] : -Sine[(int)(-(x))])
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45
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46 #define PUPDATE 999999
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47
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48 int pl_home[4];
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49 int pl_core[4][10];
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50 int pl_dist[4][10];
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51 double increment = 0.016;
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52 double incrementrecip = 62.5;
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53 float *Cosine, *Sine;
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54
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55 double dpre;
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56 double fpre;
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57 double pi = 3.1415926;
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58
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59 int planeti, planetj;
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60
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61 /* call only once */
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62
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63
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64 void
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65 pinit()
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66 {
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67 double dx, dy;
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68 int i, j;
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69
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70 int pre;
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71
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72 void pmove();
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73
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74 pre = 3.5 / increment;
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75 dpre = (double) pre;
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76
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77 Cosine = (float *) calloc(sizeof(float), pre);
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78 Sine = (float *) calloc(sizeof(float), pre);
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79 for (i = 0; i < pre; i++)
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80 {
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81 Cosine[i] = cos((double) i * increment);
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82 Sine[i] = sin((double) i * increment);
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83 }
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84
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85 /* openmem(); */
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86
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87 pl_home[0] = 0;
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88 pl_core[0][0] = 5;
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89 pl_core[0][1] = 7;
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90 pl_core[0][2] = 8;
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91 pl_core[0][3] = 9;
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92 pl_home[1] = 10;
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93 pl_core[1][0] = 12;
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94 pl_core[1][1] = 15;
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95 pl_core[1][2] = 16;
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96 pl_core[1][3] = 19;
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97 pl_home[2] = 20;
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98 pl_core[2][0] = 24;
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99 pl_core[2][1] = 26;
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100 pl_core[2][2] = 29;
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101 pl_core[2][3] = 25;
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102 pl_home[3] = 30;
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103 pl_core[3][0] = 34;
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104 pl_core[3][1] = 37;
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105 pl_core[3][2] = 38;
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106 pl_core[3][3] = 39;
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107
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108 for (i = 0; i < 4; i++)
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109 {
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110 for (j = 0; j < 4; j++)
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111 {
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112 dx = (double) (planets[pl_core[i][j]].pl_x - planets[pl_home[i]].pl_x);
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113 dy = (double) (planets[pl_home[i]].pl_y - planets[pl_core[i][j]].pl_y);
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114 pl_dist[i][j] = isqrt(dx * dx + dy * dy);
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115 /* pl_dist[i][j] = 12000; */
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116 }
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117 }
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118
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119 planeti = 0;
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120 planetj = 0;
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121
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122 #if 0
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123 {
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124 static struct itimerval udt;
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125 r_signal(SIGALRM, pmove);
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126
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127 udt.it_interval.tv_sec = 0;
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128 udt.it_interval.tv_usec = PUPDATE;
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129 udt.it_value.tv_sec = 0;
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130 udt.it_value.tv_usec = PUPDATE;
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131 (void) setitimer(ITIMER_REAL, &udt, (struct itimerval *) 0);
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132
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133 while (1)
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134 pause();
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135 }
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136 #endif
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137 }
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138
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139 /* call once per second */
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140 void
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141 pmove()
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142 {
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143 int i, j;
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144 double dir;
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145 double dx, dy;
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146
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147 /*
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148 * for (i = 0; i < 4; i++) { for (j = 0; j < 4; j++) {
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149 */
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150 i = planeti;
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151 j = planetj;
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152 planetj = (planetj + 1) % 4;
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153 if (planetj == 0)
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154 planeti = (planeti + 1) % 4;
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155
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156 dir = atan2((double) (planets[pl_core[i][j]].pl_y - planets[pl_home[i]].pl_y),
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157 (double) (planets[pl_core[i][j]].pl_x - planets[pl_home[i]].pl_x));
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158 if (dir > pi)
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159 dir = dir - 2.0 * pi;
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160 if (dir >= 0.0)
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161 dir = (dir * incrementrecip + 1.5);
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162 else
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163 dir = (dir * incrementrecip + 0.5);
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164
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165
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166 planets[pl_core[i][j]].pl_x =
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167 planets[pl_home[i]].pl_x +
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168 (int) (pl_dist[i][j] * (dx = COS(dir)));
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169 planets[pl_core[i][j]].pl_y =
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170 planets[pl_home[i]].pl_y +
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171 (int) (pl_dist[i][j] * (dy = SIN(dir)));
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172 /*
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173 * dir = atan2((double) (planets[pl_core[i][j]].pl_y -
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174 * planets[pl_home[i]].pl_y), (double) (planets[pl_core[i][j]].pl_x -
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175 * planets[pl_home[i]].pl_x));
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176 */
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177
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178 /* planets[pl_core[i][j]].pl_flags |= PLREDRAW; */
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179 }
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180
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181 /*
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182 * } }
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183 */
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184
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185 /*
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186 * usage(string) char *string; { printf("Usage: %s [-dnnn]\n", string);
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187 * printf(" -dnnn delay nnn 1/10 seconds between frames\n"); }
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188 *
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189 * openmem() { extern int errno; int shmemKey = PKEY; int shmid; struct
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190 * memory *sharedMemory;
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191 *
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192 * errno = 0; shmid = shmget(shmemKey, 0, 0); if (shmid < 0) { if (errno !=
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193 * ENOENT) { fprintf(stderr, "shmget\n"); exit(1); } shmid = shmget(shmemKey,
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194 * 0, 0); if (shmid < 0) { fprintf(stderr, "Daemon not running\n"); exit (1);
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195 * } } sharedMemory = (struct memory *) shmat(shmid, 0, 0); if (sharedMemory
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196 * == (struct memory *) -1) { fprintf(stderr, "shared memory\n"); exit (1); }
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197 * players = sharedMemory->players; torps = sharedMemory->torps; plasmatorps
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198 * = sharedMemory->plasmatorps; planets = sharedMemory->planets; phasers =
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199 * sharedMemory->phasers; mctl = sharedMemory->mctl; messages =
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200 * sharedMemory->messages; teams = sharedMemory->teams; status =
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201 * sharedMemory->status; }
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202 */
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