--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Xcode/TemplatesForXcode/SDL OpenGL Application/atlantis/swim.c	Sat Jul 21 17:09:01 2007 +0000
@@ -0,0 +1,188 @@
+/**
+ * (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+ * Unpublished-- rights reserved under the copyright laws of the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);
+        }
+    }
+}