1 /* atlantis --- Shows moving 3D sea animals */
4 static const char sccsid[] = "@(#)atlantis.c 5.08 2003/04/09 xlockmore";
7 /* Copyright (c) E. Lassauge, 1998. */
10 * Permission to use, copy, modify, and distribute this software and its
11 * documentation for any purpose and without fee is hereby granted,
12 * provided that the above copyright notice appear in all copies and that
13 * both that copyright notice and this permission notice appear in
14 * supporting documentation.
16 * This file is provided AS IS with no warranties of any kind. The author
17 * shall have no liability with respect to the infringement of copyrights,
18 * trade secrets or any patents by this file or any part thereof. In no
19 * event will the author be liable for any lost revenue or profits or
20 * other special, indirect and consequential damages.
22 * The original code for this mode was written by Mark J. Kilgard
23 * as a demo for openGL programming.
25 * Porting it to xlock was possible by comparing the original Mesa's morph3d
26 * demo with it's ported version to xlock, so thanks for Marcelo F. Vianna
27 * (look at morph3d.c) for his indirect help.
29 * Thanks goes also to Brian Paul for making it possible and inexpensive
30 * to use OpenGL at home.
32 * My e-mail address is lassauge@mail.dotcom.fr
34 * Eric Lassauge (May-13-1998)
38 * Jamie Zawinski, 2-Apr-01: - The fishies were inside out! The back faces
39 * were being drawn, not the front faces.
40 * - Added a texture to simulate light from the
41 * surface, like in the SGI version.
43 * David A. Bagley - 98/06/17 : Add whalespeed option. Global options to
44 * initialize local variables are now:
45 * XLock.atlantis.cycles: 100 ! SharkSpeed
46 * XLock.atlantis.batchcount: 4 ! SharkNum
47 * XLock.atlantis.whalespeed: 250 ! WhaleSpeed
48 * XLock.atlantis.size: 6000 ! SharkSize
49 * Add random direction for whales/dolphins
51 * E.Lassauge - 98/06/16: Use the following global options to initialize
53 * XLock.atlantis.delay: 100 ! SharkSpeed
54 * XLock.atlantis.batchcount: 4 ! SharkNum
55 * XLock.atlantis.cycles: 250 ! WhaleSpeed
56 * XLock.atlantis.size: 6000 ! SharkSize
57 * Add support for -/+ wireframe (t'was so easy to do!)
60 * - add a sort of background image or random bg color
61 * - better handling of sizes and speeds
62 * - test standalone and module modes
66 /* Copyright (c) Mark J. Kilgard, 1994. */
69 * (c) Copyright 1993, 1994, Silicon Graphics, Inc.
71 * Permission to use, copy, modify, and distribute this software for
72 * any purpose and without fee is hereby granted, provided that the above
73 * copyright notice appear in all copies and that both the copyright notice
74 * and this permission notice appear in supporting documentation, and that
75 * the name of Silicon Graphics, Inc. not be used in advertising
76 * or publicity pertaining to distribution of the software without specific,
77 * written prior permission.
79 * THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS"
80 * AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE,
81 * INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR
82 * FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SILICON
83 * GRAPHICS, INC. BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
84 * SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY
85 * KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION,
86 * LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF
87 * THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC. HAS BEEN
88 * ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
89 * ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
90 * POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
92 * US Government Users Restricted Rights
93 * Use, duplication, or disclosure by the Government is subject to
94 * restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
95 * (c)(1)(ii) of the Rights in Technical Data and Computer Software
96 * clause at DFARS 252.227-7013 and/or in similar or successor
97 * clauses in the FAR or the DOD or NASA FAR Supplement.
98 * Unpublished-- rights reserved under the copyright laws of the
99 * United States. Contractor/manufacturer is Silicon Graphics,
100 * Inc., 2011 N. Shoreline Blvd., Mountain View, CA 94039-7311.
102 * OpenGL(TM) is a trademark of Silicon Graphics, Inc.
105 #define DEF_TEXTURE "True"
106 #define DEF_GRADIENT "False"
107 #define DEF_WHALESPEED "250"
110 # define PROGCLASS "Atlantis"
111 # define HACK_INIT init_atlantis
112 # define HACK_DRAW draw_atlantis
113 # define HACK_RESHAPE reshape_atlantis
114 # define atlantis_opts xlockmore_opts
115 # define DEFAULTS "*delay: 25000 \n" \
117 "*showFPS: False \n" \
120 "*wireframe: False \n" \
121 "*texture: " DEF_TEXTURE " \n" \
122 "*gradient: " DEF_GRADIENT " \n" \
123 "*whalespeed: " DEF_WHALESPEED " \n"
124 # include "xlockmore.h" /* from the xscreensaver distribution */
125 #else /* !STANDALONE */
126 # include "xlock.h" /* from the xlockmore distribution */
128 #endif /* !STANDALONE */
132 #include "atlantis.h"
136 static int whalespeed;
137 static int do_texture;
138 static int do_gradient;
139 static XrmOptionDescRec opts[] =
141 {"-whalespeed", ".atlantis.whalespeed", XrmoptionSepArg, (caddr_t) NULL},
142 {"-texture", ".atlantis.texture", XrmoptionNoArg, (caddr_t)"true"},
143 {"+texture", ".atlantis.texture", XrmoptionNoArg, (caddr_t)"false"},
144 {"-gradient", ".atlantis.gradient", XrmoptionNoArg, (caddr_t)"true"},
145 {"+gradient", ".atlantis.gradient", XrmoptionNoArg, (caddr_t)"false"},
148 static argtype vars[] =
150 {(caddr_t *) & whalespeed, "whalespeed", "WhaleSpeed", DEF_WHALESPEED, t_Int},
151 {(caddr_t *) &do_texture, "texture", "Texture", DEF_TEXTURE, t_Bool},
152 {(caddr_t *) &do_gradient, "gradient", "Gradient", DEF_GRADIENT, t_Bool},
155 static OptionStruct desc[] =
157 {"-whalespeed num", "speed of whales and the dolphin"},
158 {"-texture num", "whether to introduce water-like distortion"}
161 ModeSpecOpt atlantis_opts =
162 {sizeof opts / sizeof opts[0], opts, sizeof vars / sizeof vars[0], vars, desc};
165 ModStruct atlantis_description =
166 {"atlantis", "init_atlantis", "draw_atlantis", "release_atlantis",
167 "refresh_atlantis", "change_atlantis", NULL, &atlantis_opts,
168 1000, NUM_SHARKS, SHARKSPEED, SHARKSIZE, 64, 1.0, "",
169 "Shows moving sharks/whales/dolphin", 0, NULL};
173 static atlantisstruct *atlantis = NULL;
175 #include "xpm-ximage.h"
177 #include "../images/sea-texture.xpm"
181 parse_image_data(ModeInfo *mi)
183 atlantisstruct *ap = &atlantis[MI_SCREEN(mi)];
184 ap->texture = xpm_to_ximage (mi->dpy,
191 InitFishs(atlantisstruct * ap)
195 for (i = 0; i < ap->num_sharks; i++) {
196 ap->sharks[i].x = 70000.0 + NRAND(ap->sharksize);
197 ap->sharks[i].y = NRAND(ap->sharksize);
198 ap->sharks[i].z = NRAND(ap->sharksize);
199 ap->sharks[i].psi = NRAND(360) - 180.0;
200 ap->sharks[i].v = 1.0;
203 /* Random whale direction */
204 ap->whaledir = LRAND() & 1;
206 ap->dolph.x = 30000.0;
208 ap->dolph.z = (float) (ap->sharksize);
209 ap->dolph.psi = (ap->whaledir) ? 90.0 : -90.0;
210 ap->dolph.theta = 0.0;
213 ap->momWhale.x = 70000.0;
214 ap->momWhale.y = 0.0;
215 ap->momWhale.z = 0.0;
216 ap->momWhale.psi = (ap->whaledir) ? 90.0 : -90.0;
217 ap->momWhale.theta = 0.0;
218 ap->momWhale.v = 3.0;
220 ap->babyWhale.x = 60000.0;
221 ap->babyWhale.y = -2000.0;
222 ap->babyWhale.z = -2000.0;
223 ap->babyWhale.psi = (ap->whaledir) ? 90.0 : -90.0;
224 ap->babyWhale.theta = 0.0;
225 ap->babyWhale.v = 3.0;
231 atlantisstruct *ap = &atlantis[MI_SCREEN(mi)];
233 static float ambient[] =
234 {0.1, 0.1, 0.1, 1.0};
235 static float diffuse[] =
236 {1.0, 1.0, 1.0, 1.0};
237 static float position[] =
238 {0.0, 1.0, 0.0, 0.0};
239 static float mat_shininess[] =
241 static float mat_specular[] =
242 {0.8, 0.8, 0.8, 1.0};
243 static float mat_diffuse[] =
244 {0.46, 0.66, 0.795, 1.0};
245 static float mat_ambient[] =
246 {0.0, 0.1, 0.2, 1.0};
247 static float lmodel_ambient[] =
248 {0.4, 0.4, 0.4, 1.0};
249 static float lmodel_localviewer[] =
251 float fblue = 0.0, fgreen;
257 glDisable(GL_DEPTH_TEST);
258 glDisable(GL_CULL_FACE);
259 glDisable(GL_LIGHTING);
260 glDisable(GL_NORMALIZE);
264 glDepthFunc(GL_LEQUAL);
265 glEnable(GL_DEPTH_TEST);
266 glEnable(GL_CULL_FACE);
267 glEnable(GL_NORMALIZE);
268 glShadeModel(GL_SMOOTH);
270 glLightfv(GL_LIGHT0, GL_AMBIENT, ambient);
271 glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuse);
272 glLightfv(GL_LIGHT0, GL_POSITION, position);
273 glLightModelfv(GL_LIGHT_MODEL_AMBIENT, lmodel_ambient);
274 glLightModelfv(GL_LIGHT_MODEL_LOCAL_VIEWER, lmodel_localviewer);
275 glEnable(GL_LIGHTING);
278 glMaterialfv(GL_FRONT_AND_BACK, GL_SHININESS, mat_shininess);
279 glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, mat_specular);
280 glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, mat_diffuse);
281 glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, mat_ambient);
284 if (ap->wire || !do_texture)
286 glDisable(GL_TEXTURE_2D);
290 GLfloat s_plane[] = { 1, 0, 0, 0 };
291 GLfloat t_plane[] = { 0, 0, 1, 0 };
292 GLfloat scale = 0.0005;
295 parse_image_data (mi);
298 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA,
299 ap->texture->width, ap->texture->height, 0,
300 GL_RGBA, GL_UNSIGNED_BYTE,
302 check_gl_error("texture");
304 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
305 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
306 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
307 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
309 glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
311 glTexGeni (GL_S, GL_TEXTURE_GEN_MODE, GL_EYE_LINEAR);
312 glTexGeni (GL_T, GL_TEXTURE_GEN_MODE, GL_EYE_LINEAR);
313 glTexGenfv(GL_S, GL_EYE_PLANE, s_plane);
314 glTexGenfv(GL_T, GL_EYE_PLANE, t_plane);
316 glEnable(GL_TEXTURE_GEN_S);
317 glEnable(GL_TEXTURE_GEN_T);
318 glEnable(GL_TEXTURE_2D);
320 glMatrixMode(GL_TEXTURE);
322 glScalef(scale, scale, 1);
323 glMatrixMode(GL_MODELVIEW);
328 /* Add a little randomness */
329 fblue = ((float) (NRAND(30)) / 100.0) + 0.70;
330 fgreen = fblue * 0.56;
331 glClearColor(0.0, fgreen, fblue, 0.0);
335 reshape_atlantis(ModeInfo * mi, int width, int height)
337 atlantisstruct *ap = &atlantis[MI_SCREEN(mi)];
339 glViewport(0, 0, ap->WinW = (GLint) width, ap->WinH = (GLint) height);
341 glMatrixMode(GL_PROJECTION);
343 gluPerspective(400.0, (GLdouble) width / (GLdouble) height, 1.0, 2000000.0);
344 glMatrixMode(GL_MODELVIEW);
348 /* jwz -- this doesn't really work very well.
350 All I want to do is give the tank a gradient-filled background, instead
351 of just solid blue. The following was my guess as to how to do this,
352 but it kills my frame rate. I guess there's a more efficient way to do
353 this, but I don't see it...
355 I mean, all I want to do is dump some non-projected bytes into the color
356 buffer, then zero out the depth buffer. That *can't* be expensive, can
360 clear_tank (atlantisstruct * ap)
362 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
364 if (do_gradient && !ap->wire)
366 static GLuint gradient_list = 0;
367 static GLuint gradient_tex = 0;
369 if (gradient_list == 0)
371 unsigned char *pixels = 0;
373 int end = start + 128;
374 int size = 4 * (end - start);
377 pixels = (unsigned char *) malloc (size);
382 pixels[i] = (start + (i>>2)) * 0.56; i++;
383 pixels[i] = (start + (i>>2)); i++;
384 pixels[i] = 255; i++;
389 glGenTextures(1, &gradient_tex);
390 glBindTexture(GL_TEXTURE_1D, gradient_tex);
392 glTexImage1D(GL_TEXTURE_1D, 0, 4,
394 GL_RGBA, GL_UNSIGNED_BYTE, pixels);
395 check_gl_error ("gradient texture");
396 glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
397 glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
400 gradient_list = glGenLists(1);
401 glNewList(gradient_list, GL_COMPILE);
404 glDisable(GL_DEPTH_TEST);
405 glDisable(GL_LIGHTING);
406 glDisable(GL_TEXTURE_2D);
407 glEnable(GL_TEXTURE_1D);
408 glBindTexture(GL_TEXTURE_1D, gradient_tex);
409 glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);
410 glTexParameterf(GL_TEXTURE_1D, GL_TEXTURE_WRAP_S, GL_CLAMP);
412 glMatrixMode(GL_PROJECTION);
415 glRotatef(90, 0, 0, 1);
416 glTranslatef(-1, -1, 0);
420 glTexCoord1i(1); glVertex3i(1, 0, 0);
421 glTexCoord1i(0); glVertex3i(0, 0, 0);
422 glTexCoord1i(0); glVertex3i(0, 1, 0);
423 glTexCoord1i(1); glVertex3i(1, 1, 0);
428 glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
429 glDisable(GL_TEXTURE_1D);
432 glEnable(GL_DEPTH_TEST);
433 glEnable(GL_CULL_FACE);
434 glEnable(GL_LIGHTING);
436 glEnable(GL_TEXTURE_2D);
439 check_gl_error ("gradient list");
442 glCallList(gradient_list);
448 Animate(atlantisstruct * ap)
452 for (i = 0; i < ap->num_sharks; i++) {
453 SharkPilot(&(ap->sharks[i]), ap->sharkspeed);
456 WhalePilot(&(ap->dolph), ap->whalespeed, ap->whaledir);
458 WhalePilot(&(ap->momWhale), ap->whalespeed, ap->whaledir);
460 WhalePilot(&(ap->babyWhale), ap->whalespeed, ap->whaledir);
465 AllDisplay(atlantisstruct * ap)
471 for (i = 0; i < ap->num_sharks; i++) {
473 FishTransform(&(ap->sharks[i]));
474 DrawShark(&(ap->sharks[i]), ap->wire);
479 FishTransform(&(ap->dolph));
480 DrawDolphin(&(ap->dolph), ap->wire);
484 FishTransform(&(ap->momWhale));
485 DrawWhale(&(ap->momWhale), ap->wire);
489 FishTransform(&(ap->babyWhale));
490 glScalef(0.45, 0.45, 0.3);
491 DrawWhale(&(ap->babyWhale), ap->wire);
496 *-----------------------------------------------------------------------------
497 *-----------------------------------------------------------------------------
499 *-----------------------------------------------------------------------------
500 *-----------------------------------------------------------------------------
504 *-----------------------------------------------------------------------------
505 * Initialize atlantis. Called each time the window changes.
506 *-----------------------------------------------------------------------------
510 init_atlantis(ModeInfo * mi)
512 int screen = MI_SCREEN(mi);
514 Display *display = MI_DISPLAY(mi);
515 Window window = MI_WINDOW(mi);
517 if (atlantis == NULL) {
518 if ((atlantis = (atlantisstruct *) calloc(MI_NUM_SCREENS(mi),
519 sizeof (atlantisstruct))) == NULL)
522 ap = &atlantis[screen];
523 ap->num_sharks = MI_COUNT(mi);
524 if (ap->sharks == NULL) {
525 if ((ap->sharks = (fishRec *) calloc(ap->num_sharks,
526 sizeof (fishRec))) == NULL) {
527 /* free everything up to now */
528 (void) free((void *) atlantis);
533 ap->sharkspeed = MI_CYCLES(mi); /* has influence on the "width"
535 ap->sharksize = MI_SIZE(mi); /* has influence on the "distance"
537 ap->whalespeed = whalespeed;
538 ap->wire = MI_IS_WIREFRAME(mi);
540 if (MI_IS_DEBUG(mi)) {
541 (void) fprintf(stderr,
542 "%s:\n\tnum_sharks=%d\n\tsharkspeed=%.1f\n\tsharksize=%d\n\twhalespeed=%.1f\n\twireframe=%s\n",
548 ap->wire ? "yes" : "no"
551 if ((ap->glx_context = init_GL(mi)) != NULL) {
553 reshape_atlantis(mi, MI_WIDTH(mi), MI_HEIGHT(mi));
554 glDrawBuffer(GL_BACK);
557 glXSwapBuffers(display, window);
565 *-----------------------------------------------------------------------------
566 * Called by the mainline code periodically to update the display.
567 *-----------------------------------------------------------------------------
570 draw_atlantis(ModeInfo * mi)
572 atlantisstruct *ap = &atlantis[MI_SCREEN(mi)];
574 Display *display = MI_DISPLAY(mi);
575 Window window = MI_WINDOW(mi);
577 MI_IS_DRAWN(mi) = True;
579 if (!ap->glx_context)
582 glXMakeCurrent(display, window, *(ap->glx_context));
584 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
589 if (mi->fps_p) do_fps (mi);
590 glXSwapBuffers(display, window);
595 *-----------------------------------------------------------------------------
596 * The display is being taken away from us. Free up malloc'ed
597 * memory and X resources that we've alloc'ed. Only called
598 * once, we must zap everything for every screen.
599 *-----------------------------------------------------------------------------
603 release_atlantis(ModeInfo * mi)
607 if (atlantis != NULL) {
608 for (screen = 0; screen < MI_NUM_SCREENS(mi); screen++) {
609 atlantisstruct *ap = &atlantis[screen];
612 (void) free((void *) ap->sharks);
614 (void) free((void *) atlantis);
621 refresh_atlantis(ModeInfo * mi)
626 change_atlantis(ModeInfo * mi)
628 atlantisstruct *ap = &atlantis[MI_SCREEN(mi)];
630 if (!ap->glx_context)
633 glXMakeCurrent(MI_DISPLAY(mi), MI_WINDOW(mi), *(ap->glx_context));