/* atlantis --- Shows moving 3D sea animals */
#if !defined( lint ) && !defined( SABER )
-static const char sccsid[] = "@(#)whale.c 1.1 98/05/13 xlockmore";
+static const char sccsid[] = "@(#)swim.c 1.3 98/06/18 xlockmore";
#endif
* OpenGL(TM) is a trademark of Silicon Graphics, Inc.
*/
-#include <math.h>
-
#ifdef STANDALONE
+# include <math.h>
# include "xlockmoreI.h" /* from the xscreensaver distribution */
#else /* !STANDALONE */
# include "xlock.h" /* from the xlockmore distribution */
#ifdef USE_GL
#include "atlantis.h"
-#include <stdlib.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);
+ 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)
+WhalePilot(fishRec * fish, float whalespeed, Bool whaledir)
{
- fish->phi = -20.0;
- fish->theta = 0.0;
- fish->psi -= 0.5;
+ 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);
+ 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)
+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);
+ 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)
+SharkMiss(atlantisstruct * ap, int i)
{
- int j;
- float avoid, thetal;
- float X, Y, Z, R;
-
- for (j = 0; j < 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 < 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);
- }
- }
+ 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