| File: | src/games/trek/klmove.c |
| Warning: | line 161, column 7 Value stored to 'fudgey' is never read |
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| 1 | /* $OpenBSD: klmove.c,v 1.7 2016/01/07 14:37:51 mestre Exp $ */ |
| 2 | /* $NetBSD: klmove.c,v 1.3 1995/04/22 10:59:07 cgd Exp $ */ |
| 3 | |
| 4 | /* |
| 5 | * Copyright (c) 1980, 1993 |
| 6 | * The Regents of the University of California. All rights reserved. |
| 7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions |
| 10 | * are met: |
| 11 | * 1. Redistributions of source code must retain the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer. |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer in the |
| 15 | * documentation and/or other materials provided with the distribution. |
| 16 | * 3. Neither the name of the University nor the names of its contributors |
| 17 | * may be used to endorse or promote products derived from this software |
| 18 | * without specific prior written permission. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 21 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 22 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 23 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 24 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 25 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 26 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 27 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 28 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 29 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 30 | * SUCH DAMAGE. |
| 31 | */ |
| 32 | |
| 33 | #include <stdio.h> |
| 34 | |
| 35 | #include "trek.h" |
| 36 | |
| 37 | /* |
| 38 | ** Move Klingons Around |
| 39 | ** |
| 40 | ** This is a largely incomprehensible block of code that moves |
| 41 | ** Klingons around in a quadrant. It was written in a very |
| 42 | ** "program as you go" fashion, and is a prime candidate for |
| 43 | ** rewriting. |
| 44 | ** |
| 45 | ** The flag `fl' is zero before an attack, one after an attack, |
| 46 | ** and two if you are leaving a quadrant. This serves to |
| 47 | ** change the probability and distance that it moves. |
| 48 | ** |
| 49 | ** Basically, what it will try to do is to move a certain number |
| 50 | ** of steps either toward you or away from you. It will avoid |
| 51 | ** stars whenever possible. Nextx and nexty are the next |
| 52 | ** sector to move to on a per-Klingon basis; they are roughly |
| 53 | ** equivalent to Ship.sectx and Ship.secty for the starship. Lookx and |
| 54 | ** looky are the sector that you are going to look at to see |
| 55 | ** if you can move their. Dx and dy are the increment. Fudgex |
| 56 | ** and fudgey are the things you change around to change your |
| 57 | ** course around stars. |
| 58 | */ |
| 59 | |
| 60 | void |
| 61 | klmove(int fl) |
| 62 | { |
| 63 | int n; |
| 64 | struct kling *k; |
| 65 | double dx, dy; |
| 66 | int nextx, nexty; |
| 67 | int lookx, looky; |
| 68 | int motion; |
| 69 | int fudgex, fudgey; |
| 70 | int qx, qy; |
| 71 | double bigger; |
| 72 | int i; |
| 73 | |
| 74 | # ifdef xTRACE |
| 75 | if (Trace) |
| 76 | printf("klmove: fl = %d, Etc.nkling = %d\n", fl, Etc.nkling); |
| 77 | # endif |
| 78 | for (n = 0; n < Etc.nkling; n++) |
| 79 | { |
| 80 | k = &Etc.klingon[n]; |
| 81 | i = 100; |
| 82 | if (fl) |
| 83 | i = 100.0 * k->power / Param.klingpwr; |
| 84 | if (ranf(i) >= Param.moveprob[2 * Move.newquad + fl]) |
| 85 | continue; |
| 86 | /* compute distance to move */ |
| 87 | motion = ranf(75) - 25; |
| 88 | motion *= k->avgdist * Param.movefac[2 * Move.newquad + fl]; |
| 89 | /* compute direction */ |
| 90 | dx = Ship.sectx - k->x + ranf(3) - 1; |
| 91 | dy = Ship.secty - k->y + ranf(3) - 1; |
| 92 | bigger = dx; |
| 93 | if (dy > bigger) |
| 94 | bigger = dy; |
| 95 | if (bigger == 0.0) |
| 96 | bigger = 1.0; |
| 97 | dx = dx / bigger + 0.5; |
| 98 | dy = dy / bigger + 0.5; |
| 99 | if (motion < 0) |
| 100 | { |
| 101 | motion = -motion; |
| 102 | dx = -dx; |
| 103 | dy = -dy; |
| 104 | } |
| 105 | fudgex = fudgey = 1; |
| 106 | /* try to move the klingon */ |
| 107 | nextx = k->x; |
| 108 | nexty = k->y; |
| 109 | for (; motion > 0; motion--) |
| 110 | { |
| 111 | lookx = nextx + dx; |
| 112 | looky = nexty + dy; |
| 113 | if (lookx < 0 || lookx >= NSECTS10 || looky < 0 || looky >= NSECTS10) |
| 114 | { |
| 115 | /* new quadrant */ |
| 116 | qx = Ship.quadx; |
| 117 | qy = Ship.quady; |
| 118 | if (lookx < 0) |
| 119 | qx -= 1; |
| 120 | else |
| 121 | if (lookx >= NSECTS10) |
| 122 | qx += 1; |
| 123 | if (looky < 0) |
| 124 | qy -= 1; |
| 125 | else |
| 126 | if (looky >= NSECTS10) |
| 127 | qy += 1; |
| 128 | if (qx < 0 || qx >= NQUADS8 || qy < 0 || qy >= NQUADS8 || |
| 129 | Quad[qx][qy].stars < 0 || Quad[qx][qy].klings > MAXKLQUAD9 - 1) |
| 130 | break; |
| 131 | if (!damaged(SRSCAN1)) |
| 132 | { |
| 133 | printf("Klingon at %d,%d escapes to quadrant %d,%d\n", |
| 134 | k->x, k->y, qx, qy); |
| 135 | motion = Quad[qx][qy].scanned; |
| 136 | if (motion >= 0 && motion < 1000) |
| 137 | Quad[qx][qy].scanned += 100; |
| 138 | motion = Quad[Ship.quadx][Ship.quady].scanned; |
| 139 | if (motion >= 0 && motion < 1000) |
| 140 | Quad[Ship.quadx][Ship.quady].scanned -= 100; |
| 141 | } |
| 142 | Sect[k->x][k->y] = EMPTY'.'; |
| 143 | Quad[qx][qy].klings += 1; |
| 144 | Etc.nkling -= 1; |
| 145 | *k = Etc.klingon[Etc.nkling]; |
| 146 | Quad[Ship.quadx][Ship.quady].klings -= 1; |
| 147 | k = 0; |
| 148 | break; |
| 149 | } |
| 150 | if (Sect[lookx][looky] != EMPTY'.') |
| 151 | { |
| 152 | lookx = nextx + fudgex; |
| 153 | if (lookx < 0 || lookx >= NSECTS10) |
| 154 | lookx = nextx + dx; |
| 155 | if (Sect[lookx][looky] != EMPTY'.') |
| 156 | { |
| 157 | fudgex = -fudgex; |
| 158 | looky = nexty + fudgey; |
| 159 | if (looky < 0 || looky >= NSECTS10 || Sect[lookx][looky] != EMPTY'.') |
| 160 | { |
| 161 | fudgey = -fudgey; |
Value stored to 'fudgey' is never read | |
| 162 | break; |
| 163 | } |
| 164 | } |
| 165 | } |
| 166 | nextx = lookx; |
| 167 | nexty = looky; |
| 168 | } |
| 169 | if (k && (k->x != nextx || k->y != nexty)) |
| 170 | { |
| 171 | if (!damaged(SRSCAN1)) |
| 172 | printf("Klingon at %d,%d moves to %d,%d\n", |
| 173 | k->x, k->y, nextx, nexty); |
| 174 | Sect[k->x][k->y] = EMPTY'.'; |
| 175 | Sect[k->x = nextx][k->y = nexty] = KLINGON'K'; |
| 176 | } |
| 177 | } |
| 178 | compkldist(0); |
| 179 | } |