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/**
* (c) Copyright 1993, 1994, Silicon Graphics, Inc.
* ALL RIGHTS RESERVED
* Permission to use, copy, modify, and distribute this software for
* any purpose and without fee is hereby granted, provided that the above
* copyright notice appear in all copies and that both the copyright notice
* and this permission notice appear in supporting documentation, and that
* the name of Silicon Graphics, Inc. not be used in advertising
* or publicity pertaining to distribution of the software without specific,
* written prior permission.
*
* THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS"
* AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR
* FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SILICON
* GRAPHICS, INC. BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
* SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY
* KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION,
* LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF
* THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC. HAS BEEN
* ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
* POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
*
* US Government Users Restricted Rights
* Use, duplication, or disclosure by the Government is subject to
* restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
* (c)(1)(ii) of the Rights in Technical Data and Computer Software
* clause at DFARS 252.227-7013 and/or in similar or successor
* clauses in the FAR or the DOD or NASA FAR Supplement.
* Unpublished-- rights reserved under the copyright laws of the
* United States. Contractor/manufacturer is Silicon Graphics,
* Inc., 2011 N. Shoreline Blvd., Mountain View, CA 94039-7311.
*
* OpenGL(TM) is a trademark of Silicon Graphics, Inc.
*/
#include <math.h>
#include <stdlib.h> /* For rand(). */
#include <GLUT/glut.h>
#include "atlantis.h"
void
FishTransform(fishRec * fish)
{
glTranslatef(fish->y, fish->z, -fish->x);
glRotatef(-fish->psi, 0.0, 1.0, 0.0);
glRotatef(fish->theta, 1.0, 0.0, 0.0);
glRotatef(-fish->phi, 0.0, 0.0, 1.0);
}
void
WhalePilot(fishRec * fish)
{
fish->phi = -20.0;
fish->theta = 0.0;
fish->psi -= 0.5;
fish->x += WHALESPEED * fish->v * cos(fish->psi / RAD) * cos(fish->theta / RAD);
fish->y += WHALESPEED * fish->v * sin(fish->psi / RAD) * cos(fish->theta / RAD);
fish->z += WHALESPEED * fish->v * sin(fish->theta / RAD);
}
void
SharkPilot(fishRec * fish)
{
static int sign = 1;
float X, Y, Z, tpsi, ttheta, thetal;
fish->xt = 60000.0;
fish->yt = 0.0;
fish->zt = 0.0;
X = fish->xt - fish->x;
Y = fish->yt - fish->y;
Z = fish->zt - fish->z;
thetal = fish->theta;
ttheta = RAD * atan(Z / (sqrt(X * X + Y * Y)));
if (ttheta > fish->theta + 0.25) {
fish->theta += 0.5;
} else if (ttheta < fish->theta - 0.25) {
fish->theta -= 0.5;
}
if (fish->theta > 90.0) {
fish->theta = 90.0;
}
if (fish->theta < -90.0) {
fish->theta = -90.0;
}
fish->dtheta = fish->theta - thetal;
tpsi = RAD * atan2(Y, X);
fish->attack = 0;
if (fabs(tpsi - fish->psi) < 10.0) {
fish->attack = 1;
} else if (fabs(tpsi - fish->psi) < 45.0) {
if (fish->psi > tpsi) {
fish->psi -= 0.5;
if (fish->psi < -180.0) {
fish->psi += 360.0;
}
} else if (fish->psi < tpsi) {
fish->psi += 0.5;
if (fish->psi > 180.0) {
fish->psi -= 360.0;
}
}
} else {
if (rand() % 100 > 98) {
sign = 1 - sign;
}
fish->psi += sign;
if (fish->psi > 180.0) {
fish->psi -= 360.0;
}
if (fish->psi < -180.0) {
fish->psi += 360.0;
}
}
if (fish->attack) {
if (fish->v < 1.1) {
fish->spurt = 1;
}
if (fish->spurt) {
fish->v += 0.2;
}
if (fish->v > 5.0) {
fish->spurt = 0;
}
if ((fish->v > 1.0) && (!fish->spurt)) {
fish->v -= 0.2;
}
} else {
if (!(rand() % 400) && (!fish->spurt)) {
fish->spurt = 1;
}
if (fish->spurt) {
fish->v += 0.05;
}
if (fish->v > 3.0) {
fish->spurt = 0;
}
if ((fish->v > 1.0) && (!fish->spurt)) {
fish->v -= 0.05;
}
}
fish->x += SHARKSPEED * fish->v * cos(fish->psi / RAD) * cos(fish->theta / RAD);
fish->y += SHARKSPEED * fish->v * sin(fish->psi / RAD) * cos(fish->theta / RAD);
fish->z += SHARKSPEED * fish->v * sin(fish->theta / RAD);
}
void
SharkMiss(int i)
{
int j;
float avoid, thetal;
float X, Y, Z, R;
for (j = 0; j < NUM_SHARKS; j++) {
if (j != i) {
X = sharks[j].x - sharks[i].x;
Y = sharks[j].y - sharks[i].y;
Z = sharks[j].z - sharks[i].z;
R = sqrt(X * X + Y * Y + Z * Z);
avoid = 1.0;
thetal = sharks[i].theta;
if (R < SHARKSIZE) {
if (Z > 0.0) {
sharks[i].theta -= avoid;
} else {
sharks[i].theta += avoid;
}
}
sharks[i].dtheta += (sharks[i].theta - thetal);
}
}
}