--- /dev/null
+/* atlantis --- Shows moving 3D sea animals */
+
+#if !defined( lint ) && !defined( SABER )
+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@sagem.fr
+ *
+ * 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)
+{
+ 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 (NRAND(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 (!(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
projects / xscreensaver / blobdiff