/* atlantis --- Shows moving 3D sea animals */
-#if !defined( lint ) && !defined( SABER )
-static const char sccsid[] = "@(#)atlantis.c 1.3 98/06/18 xlockmore";
-
+#if 0
+static const char sccsid[] = "@(#)atlantis.c 5.08 2003/04/09 xlockmore";
#endif
/* Copyright (c) E. Lassauge, 1998. */
* 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
+ * My e-mail address is lassauge@mail.dotcom.fr
*
* Eric Lassauge (May-13-1998)
*
* OpenGL(TM) is a trademark of Silicon Graphics, Inc.
*/
+#define DEF_TEXTURE "True"
+#define DEF_GRADIENT "False"
+#define DEF_WHALESPEED "250"
+
#ifdef STANDALONE
# define PROGCLASS "Atlantis"
# define HACK_INIT init_atlantis
# define HACK_DRAW draw_atlantis
# define HACK_RESHAPE reshape_atlantis
# define atlantis_opts xlockmore_opts
-# define DEFAULTS "*delay: 40000 \n" \
+# define DEFAULTS "*delay: 25000 \n" \
"*count: 4 \n" \
"*showFPS: False \n" \
"*cycles: 100 \n" \
"*size: 6000 \n" \
"*wireframe: False \n" \
- "*whalespeed: 250 \n"
+ "*texture: " DEF_TEXTURE " \n" \
+ "*gradient: " DEF_GRADIENT " \n" \
+ "*whalespeed: " DEF_WHALESPEED " \n"
# include "xlockmore.h" /* from the xscreensaver distribution */
#else /* !STANDALONE */
# include "xlock.h" /* from the xlockmore distribution */
#include <GL/glu.h>
-#define DEF_TEXTURE "True"
-
-#define DEF_WHALESPEED "250"
static int whalespeed;
static int do_texture;
+static int do_gradient;
static XrmOptionDescRec opts[] =
{
{"-whalespeed", ".atlantis.whalespeed", XrmoptionSepArg, (caddr_t) NULL},
{"-texture", ".atlantis.texture", XrmoptionNoArg, (caddr_t)"true"},
{"+texture", ".atlantis.texture", XrmoptionNoArg, (caddr_t)"false"},
+ {"-gradient", ".atlantis.gradient", XrmoptionNoArg, (caddr_t)"true"},
+ {"+gradient", ".atlantis.gradient", XrmoptionNoArg, (caddr_t)"false"},
};
static argtype vars[] =
{
{(caddr_t *) & whalespeed, "whalespeed", "WhaleSpeed", DEF_WHALESPEED, t_Int},
{(caddr_t *) &do_texture, "texture", "Texture", DEF_TEXTURE, t_Bool},
+ {(caddr_t *) &do_gradient, "gradient", "Gradient", DEF_GRADIENT, t_Bool},
};
static OptionStruct desc[] =
static atlantisstruct *atlantis = NULL;
#include "xpm-ximage.h"
+
#include "../images/sea-texture.xpm"
+
static void
parse_image_data(ModeInfo *mi)
{
ap->sharks[i].v = 1.0;
}
- /* Random whae direction */
+ /* Random whale direction */
ap->whaledir = LRAND() & 1;
ap->dolph.x = 30000.0;
{0.4, 0.4, 0.4, 1.0};
static float lmodel_localviewer[] =
{0.0};
- float fblue = 0.0, fgreen;
+ float fblue = 0.0, fgreen;
glFrontFace(GL_CCW);
InitFishs(ap);
/* Add a little randomness */
- fblue = ((float) (NRAND(50)) / 100.0) + 0.50;
+ fblue = ((float) (NRAND(30)) / 100.0) + 0.70;
fgreen = fblue * 0.56;
glClearColor(0.0, fgreen, fblue, 0.0);
}
glMatrixMode(GL_MODELVIEW);
}
+
+/* jwz -- this doesn't really work very well.
+
+ All I want to do is give the tank a gradient-filled background, instead
+ of just solid blue. The following was my guess as to how to do this,
+ but it kills my frame rate. I guess there's a more efficient way to do
+ this, but I don't see it...
+
+ I mean, all I want to do is dump some non-projected bytes into the color
+ buffer, then zero out the depth buffer. That *can't* be expensive, can
+ it?
+ */
+static void
+clear_tank (atlantisstruct * ap)
+{
+ glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+ if (do_gradient && !ap->wire)
+ {
+ static GLuint gradient_list = 0;
+ static GLuint gradient_tex = 0;
+
+ if (gradient_list == 0)
+ {
+ unsigned char *pixels = 0;
+ int start = 64;
+ int end = start + 128;
+ int size = 4 * (end - start);
+ int i;
+
+ pixels = (unsigned char *) malloc (size);
+ i = 0;
+ while (i < size)
+ {
+ pixels[i] = 0; i++;
+ pixels[i] = (start + (i>>2)) * 0.56; i++;
+ pixels[i] = (start + (i>>2)); i++;
+ pixels[i] = 255; i++;
+ }
+
+ clear_gl_error();
+
+ glGenTextures(1, &gradient_tex);
+ glBindTexture(GL_TEXTURE_1D, gradient_tex);
+
+ glTexImage1D(GL_TEXTURE_1D, 0, 4,
+ (end - start), 0,
+ GL_RGBA, GL_UNSIGNED_BYTE, pixels);
+ check_gl_error ("gradient texture");
+ glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+ glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+
+
+ gradient_list = glGenLists(1);
+ glNewList(gradient_list, GL_COMPILE);
+
+ glDepthMask (False);
+ glDisable(GL_DEPTH_TEST);
+ glDisable(GL_LIGHTING);
+ glDisable(GL_TEXTURE_2D);
+ glEnable(GL_TEXTURE_1D);
+ glBindTexture(GL_TEXTURE_1D, gradient_tex);
+ glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);
+ glTexParameterf(GL_TEXTURE_1D, GL_TEXTURE_WRAP_S, GL_CLAMP);
+
+ glMatrixMode(GL_PROJECTION);
+ glPushMatrix();
+ glLoadIdentity();
+ glRotatef(90, 0, 0, 1);
+ glTranslatef(-1, -1, 0);
+ glScalef(2, 2, 1);
+
+ glBegin(GL_QUADS);
+ glTexCoord1i(1); glVertex3i(1, 0, 0);
+ glTexCoord1i(0); glVertex3i(0, 0, 0);
+ glTexCoord1i(0); glVertex3i(0, 1, 0);
+ glTexCoord1i(1); glVertex3i(1, 1, 0);
+ glEnd();
+
+ glPopMatrix();
+
+ glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
+ glDisable(GL_TEXTURE_1D);
+
+ glDepthMask (True);
+ glEnable(GL_DEPTH_TEST);
+ glEnable(GL_CULL_FACE);
+ glEnable(GL_LIGHTING);
+ if (do_texture)
+ glEnable(GL_TEXTURE_2D);
+
+ glEndList();
+ check_gl_error ("gradient list");
+ }
+
+ glCallList(gradient_list);
+ }
+}
+
+
static void
Animate(atlantisstruct * ap)
{
{
int i;
- glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+ clear_tank(ap);
for (i = 0; i < ap->num_sharks; i++) {
glPushMatrix();
projects / xscreensaver / blobdiff