3331
+ − 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+ − 31 * Unpublished-- rights reserved under the copyright laws of the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 }
