1 /** 2 * (c) Copyright 1993, 1994, Silicon Graphics, Inc. 3 * ALL RIGHTS RESERVED 4 * Permission to use, copy, modify, and distribute this software for 5 * any purpose and without fee is hereby granted, provided that the above 6 * copyright notice appear in all copies and that both the copyright notice 7 * and this permission notice appear in supporting documentation, and that 8 * the name of Silicon Graphics, Inc. not be used in advertising 9 * or publicity pertaining to distribution of the software without specific, 10 * written prior permission. 11 * 12 * THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS" 13 * AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE, 14 * INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR 15 * FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SILICON 16 * GRAPHICS, INC. BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT, 17 * SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY 18 * KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION, 19 * LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF 20 * THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC. HAS BEEN 21 * ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON 22 * ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE 23 * POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE. 24 * 25 * US Government Users Restricted Rights 26 * Use, duplication, or disclosure by the Government is subject to 27 * restrictions set forth in FAR 52.227.19(c)(2) or subparagraph 28 * (c)(1)(ii) of the Rights in Technical Data and Computer Software 29 * clause at DFARS 252.227-7013 and/or in similar or successor 30 * clauses in the FAR or the DOD or NASA FAR Supplement. 31 * Unpublished-- rights reserved under the copyright laws of the 32 * United States. Contractor/manufacturer is Silicon Graphics, 33 * Inc., 2011 N. Shoreline Blvd., Mountain View, CA 94039-7311. 34 * 35 * OpenGL(TM) is a trademark of Silicon Graphics, Inc. 36 */ 37 #include <math.h> 38 #include <stdlib.h> /* For rand(). */ 39 #include <GLUT/glut.h> 40 #include "atlantis.h" 41 42 void 43 FishTransform(fishRec * fish) 44 { 45 46 glTranslatef(fish->y, fish->z, -fish->x); 47 glRotatef(-fish->psi, 0.0, 1.0, 0.0); 48 glRotatef(fish->theta, 1.0, 0.0, 0.0); 49 glRotatef(-fish->phi, 0.0, 0.0, 1.0); 50 } 51 52 void 53 WhalePilot(fishRec * fish) 54 { 55 56 fish->phi = -20.0; 57 fish->theta = 0.0; 58 fish->psi -= 0.5; 59 60 fish->x += WHALESPEED * fish->v * cos(fish->psi / RAD) * cos(fish->theta / RAD); 61 fish->y += WHALESPEED * fish->v * sin(fish->psi / RAD) * cos(fish->theta / RAD); 62 fish->z += WHALESPEED * fish->v * sin(fish->theta / RAD); 63 } 64 65 void 66 SharkPilot(fishRec * fish) 67 { 68 static int sign = 1; 69 float X, Y, Z, tpsi, ttheta, thetal; 70 71 fish->xt = 60000.0; 72 fish->yt = 0.0; 73 fish->zt = 0.0; 74 75 X = fish->xt - fish->x; 76 Y = fish->yt - fish->y; 77 Z = fish->zt - fish->z; 78 79 thetal = fish->theta; 80 81 ttheta = RAD * atan(Z / (sqrt(X * X + Y * Y))); 82 83 if (ttheta > fish->theta + 0.25) { 84 fish->theta += 0.5; 85 } else if (ttheta < fish->theta - 0.25) { 86 fish->theta -= 0.5; 87 } 88 if (fish->theta > 90.0) { 89 fish->theta = 90.0; 90 } 91 if (fish->theta < -90.0) { 92 fish->theta = -90.0; 93 } 94 fish->dtheta = fish->theta - thetal; 95 96 tpsi = RAD * atan2(Y, X); 97 98 fish->attack = 0; 99 100 if (fabs(tpsi - fish->psi) < 10.0) { 101 fish->attack = 1; 102 } else if (fabs(tpsi - fish->psi) < 45.0) { 103 if (fish->psi > tpsi) { 104 fish->psi -= 0.5; 105 if (fish->psi < -180.0) { 106 fish->psi += 360.0; 107 } 108 } else if (fish->psi < tpsi) { 109 fish->psi += 0.5; 110 if (fish->psi > 180.0) { 111 fish->psi -= 360.0; 112 } 113 } 114 } else { 115 if (rand() % 100 > 98) { 116 sign = 1 - sign; 117 } 118 fish->psi += sign; 119 if (fish->psi > 180.0) { 120 fish->psi -= 360.0; 121 } 122 if (fish->psi < -180.0) { 123 fish->psi += 360.0; 124 } 125 } 126 127 if (fish->attack) { 128 if (fish->v < 1.1) { 129 fish->spurt = 1; 130 } 131 if (fish->spurt) { 132 fish->v += 0.2; 133 } 134 if (fish->v > 5.0) { 135 fish->spurt = 0; 136 } 137 if ((fish->v > 1.0) && (!fish->spurt)) { 138 fish->v -= 0.2; 139 } 140 } else { 141 if (!(rand() % 400) && (!fish->spurt)) { 142 fish->spurt = 1; 143 } 144 if (fish->spurt) { 145 fish->v += 0.05; 146 } 147 if (fish->v > 3.0) { 148 fish->spurt = 0; 149 } 150 if ((fish->v > 1.0) && (!fish->spurt)) { 151 fish->v -= 0.05; 152 } 153 } 154 155 fish->x += SHARKSPEED * fish->v * cos(fish->psi / RAD) * cos(fish->theta / RAD); 156 fish->y += SHARKSPEED * fish->v * sin(fish->psi / RAD) * cos(fish->theta / RAD); 157 fish->z += SHARKSPEED * fish->v * sin(fish->theta / RAD); 158 } 159 160 void 161 SharkMiss(int i) 162 { 163 int j; 164 float avoid, thetal; 165 float X, Y, Z, R; 166 167 for (j = 0; j < NUM_SHARKS; j++) { 168 if (j != i) { 169 X = sharks[j].x - sharks[i].x; 170 Y = sharks[j].y - sharks[i].y; 171 Z = sharks[j].z - sharks[i].z; 172 173 R = sqrt(X * X + Y * Y + Z * Z); 174 175 avoid = 1.0; 176 thetal = sharks[i].theta; 177 178 if (R < SHARKSIZE) { 179 if (Z > 0.0) { 180 sharks[i].theta -= avoid; 181 } else { 182 sharks[i].theta += avoid; 183 } 184 } 185 sharks[i].dtheta += (sharks[i].theta - thetal); 186 } 187 } 188 } 189
