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/* atlantis --- Shows moving 3D sea animals */
#if 0
static const char sccsid[] = "@(#)swim.c 1.3 98/06/18 xlockmore";
#endif
/* Copyright (c) E. Lassauge, 1998. */
/*
* Permission to use, copy, modify, and distribute this software and its
* documentation for any purpose and without fee is hereby granted,
* provided that the above copyright notice appear in all copies and that
* both that copyright notice and this permission notice appear in
* supporting documentation.
*
* This file is provided AS IS with no warranties of any kind. The author
* shall have no liability with respect to the infringement of copyrights,
* trade secrets or any patents by this file or any part thereof. In no
* event will the author be liable for any lost revenue or profits or
* other special, indirect and consequential damages.
*
* The original code for this mode was written by Mark J. Kilgard
* as a demo for openGL programming.
*
* Porting it to xlock was possible by comparing the original Mesa's morph3d
* demo with it's ported version to xlock, so thanks for Marcelo F. Vianna
* (look at morph3d.c) for his indirect help.
*
* Thanks goes also to Brian Paul for making it possible and inexpensive
* to use OpenGL at home.
*
* My e-mail address is lassauge@users.sourceforge.net
*
* Eric Lassauge (May-13-1998)
*
*/
/**
* (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.
*/
#ifdef STANDALONE
# include <math.h>
# include "xlockmoreI.h" /* from the xscreensaver distribution */
#else /* !STANDALONE */
# include "xlock.h" /* from the xlockmore distribution */
#endif /* !STANDALONE */
#ifdef USE_GL
#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, float whalespeed, Bool whaledir)
{
fish->phi = -20.0;
fish->theta = 0.0;
fish->psi += ((whaledir) ? -0.5 : 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, float sharkspeed)
{
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 (NRAND(100) > 98) {
fish->sign = (fish->sign < 0 ? 1 : -1);
}
fish->psi += (fish->sign ? 1 : -1);
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 (!(NRAND(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(atlantisstruct * ap, int i)
{
int j;
float avoid, thetal;
float X, Y, Z, R;
for (j = 0; j < ap->num_sharks; j++) {
if (j != i) {
X = ap->sharks[j].x - ap->sharks[i].x;
Y = ap->sharks[j].y - ap->sharks[i].y;
Z = ap->sharks[j].z - ap->sharks[i].z;
R = sqrt(X * X + Y * Y + Z * Z);
avoid = 1.0;
thetal = ap->sharks[i].theta;
if (R < ap->sharksize) {
if (Z > 0.0) {
ap->sharks[i].theta -= avoid;
} else {
ap->sharks[i].theta += avoid;
}
}
ap->sharks[i].dtheta += (ap->sharks[i].theta - thetal);
}
}
}
#endif
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