swim.c
上传用户:xk288cn
上传日期:2007-05-28
资源大小:4876k
文件大小:6k
- /**
- * (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- * Unpublished-- rights reserved under the copyright laws of the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 <GL/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);
- }
- }
- }