-/* cubestorm, Copyright (c) 2003-2014 Jamie Zawinski <jwz@jwz.org>
+/* cubestorm, Copyright (c) 2003-2018 Jamie Zawinski <jwz@jwz.org>
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
#define DEF_SPEED "1.0"
#define DEF_THICKNESS "0.06"
#define DEF_COUNT "4"
-#define DEF_DBUF "False"
+#define DEF_LENGTH "200"
+
+typedef struct {
+ GLfloat px, py, pz;
+ GLfloat rx, ry, rz;
+ int ccolor;
+} histcube;
typedef struct {
rotator *rot;
subcube *subcubes;
+ int hist_size, hist_count;
+ histcube *hist;
+
} cube_configuration;
static cube_configuration *bps = NULL;
static Bool do_wander;
static GLfloat speed;
static GLfloat thickness;
-static Bool dbuf_p;
+static int max_length;
static XrmOptionDescRec opts[] = {
{ "-spin", ".spin", XrmoptionNoArg, "True" },
{ "-db", ".doubleBuffer", XrmoptionNoArg, "True"},
{ "+db", ".doubleBuffer", XrmoptionNoArg, "False"},
{ "-thickness", ".thickness", XrmoptionSepArg, 0 },
+ { "-length", ".length", XrmoptionSepArg, 0 },
};
static argtype vars[] = {
{&do_spin, "spin", "Spin", DEF_SPIN, t_Bool},
{&do_wander, "wander", "Wander", DEF_WANDER, t_Bool},
{&speed, "speed", "Speed", DEF_SPEED, t_Float},
- {&thickness, "thickness", "Thickness", DEF_THICKNESS, t_Float},
- {&dbuf_p, "doubleBuffer", "DoubleBuffer", DEF_DBUF, t_Bool},
+ {&thickness, "thickness", "Thickness", DEF_THICKNESS, t_Float},
+ {&max_length, "length", "Length", DEF_LENGTH, t_Int},
};
ENTRYPOINT ModeSpecOpt cube_opts = {countof(opts), opts, countof(vars), vars, NULL};
MI_INIT (mi, bps);
-# ifdef HAVE_JWZGLES
- dbuf_p = True;
-# endif
-
bp = &bps[MI_SCREEN(mi)];
bp->glx_context = init_GL(mi);
bp->trackball = gltrackball_init (True);
bp->subcubes = (subcube *) calloc (MI_COUNT(mi), sizeof(subcube));
+
+ bp->hist_count = 0;
+ bp->hist_size = 100;
+ bp->hist = (histcube *) malloc (bp->hist_size * sizeof(*bp->hist));
+
for (i = 0; i < MI_COUNT(mi); i++)
{
double wander_speed, spin_speed, spin_accel;
}
+/* Originally, this program achieved the "accumulating cubes" effect by
+ simply not clearing the depth or color buffers between frames. That
+ doesn't work on modern systems, particularly mobile: you can no longer
+ rely on your buffers being unmolested once you have yielded. So now we
+ must save and re-render every polygon. Noof has the same problem and
+ solves it by taking a screenshot of the frame buffer into a texture, but
+ cubestorm needs to restore the depth buffer as well as the color buffer.
+ */
+static void
+push_hist (ModeInfo *mi)
+{
+ cube_configuration *bp = &bps[MI_SCREEN(mi)];
+ double px, py, pz;
+ double rx = 0, ry = 0, rz = 0;
+ int i;
+
+ if (bp->hist_count > max_length &&
+ bp->hist_count > MI_COUNT(mi) &&
+ !bp->button_down_p)
+ {
+ /* Drop history off of the end. */
+ memmove (bp->hist,
+ bp->hist + MI_COUNT(mi),
+ (bp->hist_count - MI_COUNT(mi)) * sizeof(*bp->hist));
+ bp->hist_count -= MI_COUNT(mi);
+ }
+
+ if (bp->hist_count + MI_COUNT(mi) >= bp->hist_size)
+ {
+ bp->hist_size = bp->hist_count + MI_COUNT(mi) + 100;
+ bp->hist = (histcube *)
+ realloc (bp->hist, bp->hist_size * sizeof(*bp->hist));
+ }
+
+ get_position (bp->subcubes[0].rot, &px, &py, &pz, !bp->button_down_p);
+
+ for (i = 0; i < MI_COUNT(mi); i++)
+ {
+ subcube *sc = &bp->subcubes[i];
+ histcube *hc = &bp->hist[bp->hist_count];
+ double rx2, ry2, rz2;
+
+ get_rotation (sc->rot, &rx2, &ry2, &rz2, !bp->button_down_p);
+
+ if (i == 0) /* N+1 cubes rotate relative to cube 0 */
+ rx = rx2, ry = ry2, rz = rz2;
+ else
+ rx2 += rx, ry2 += ry, rz2 += rz;
+
+ hc->px = px;
+ hc->py = py;
+ hc->pz = pz;
+ hc->rx = rx2;
+ hc->ry = ry2;
+ hc->rz = rz2;
+ hc->ccolor = sc->ccolor;
+ sc->ccolor++;
+ if (sc->ccolor >= bp->ncolors)
+ sc->ccolor = 0;
+ bp->hist_count++;
+ }
+}
+
+
ENTRYPOINT void
draw_cube (ModeInfo *mi)
{
Window window = MI_WINDOW(mi);
int wire = MI_IS_WIREFRAME(mi);
int i;
- double x, y, z;
if (!bp->glx_context)
return;
- glDrawBuffer(dbuf_p ? GL_BACK : GL_FRONT);
-
glXMakeCurrent(MI_DISPLAY(mi), MI_WINDOW(mi), *(bp->glx_context));
+ glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glShadeModel(GL_SMOOTH);
if (bp->clear_p) /* we're in "no vapor trails" mode */
{
- glClear(GL_DEPTH_BUFFER_BIT|GL_COLOR_BUFFER_BIT);
+ bp->hist_count = 0;
if (! (random() % (int) (25 / speed)))
bp->clear_p = False;
}
}
}
- glPushMatrix ();
-
- glScalef(1.1, 1.1, 1.1);
-
+ push_hist (mi);
mi->polygon_count = 0;
-
- get_position (bp->subcubes[0].rot, &x, &y, &z, !bp->button_down_p);
- glTranslatef((x - 0.5) * 15,
- (y - 0.5) * 15,
- (z - 0.5) * 30);
- gltrackball_rotate (bp->trackball);
-
- glScalef (4.0, 4.0, 4.0);
-
- for (i = 0; i < MI_COUNT(mi); i++)
+ for (i = 0; i < bp->hist_count; i++)
{
GLfloat bcolor[4] = {0.0, 0.0, 0.0, 1.0};
GLfloat bspec[4] = {1.0, 1.0, 1.0, 1.0};
GLfloat bshiny = 128.0;
+ histcube *hc = &bp->hist[i];
+
glPushMatrix();
+ glScalef (1.1, 1.1, 1.1);
- if (i != 0) /* N+1 cubes rotate relative to cube 0 */
- {
- get_rotation (bp->subcubes[0].rot, &x, &y, &z, False);
- glRotatef (x * 360, 1.0, 0.0, 0.0);
- glRotatef (y * 360, 0.0, 1.0, 0.0);
- glRotatef (z * 360, 0.0, 0.0, 1.0);
- }
+ glTranslatef((hc->px - 0.5) * 15,
+ (hc->py - 0.5) * 15,
+ (hc->pz - 0.5) * 30);
+ gltrackball_rotate (bp->trackball);
- get_rotation (bp->subcubes[i].rot, &x, &y, &z, !bp->button_down_p);
- glRotatef (x * 360, 1.0, 0.0, 0.0);
- glRotatef (y * 360, 0.0, 1.0, 0.0);
- glRotatef (z * 360, 0.0, 0.0, 1.0);
+ glScalef (4.0, 4.0, 4.0);
- bcolor[0] = bp->colors[bp->subcubes[i].ccolor].red / 65536.0;
- bcolor[1] = bp->colors[bp->subcubes[i].ccolor].green / 65536.0;
- bcolor[2] = bp->colors[bp->subcubes[i].ccolor].blue / 65536.0;
- bp->subcubes[i].ccolor++;
- if (bp->subcubes[i].ccolor >= bp->ncolors)
- bp->subcubes[i].ccolor = 0;
+ glRotatef (hc->rx * 360, 1.0, 0.0, 0.0);
+ glRotatef (hc->ry * 360, 0.0, 1.0, 0.0);
+ glRotatef (hc->rz * 360, 0.0, 0.0, 1.0);
+
+ bcolor[0] = bp->colors[hc->ccolor].red / 65536.0;
+ bcolor[1] = bp->colors[hc->ccolor].green / 65536.0;
+ bcolor[2] = bp->colors[hc->ccolor].blue / 65536.0;
if (wire)
glColor3f (bcolor[0], bcolor[1], bcolor[2]);
glPopMatrix();
}
- glPopMatrix ();
-
if (mi->fps_p) do_fps (mi);
glFinish();
- if (dbuf_p)
- glXSwapBuffers(dpy, window);
+ glXSwapBuffers(dpy, window);
}
XSCREENSAVER_MODULE_2 ("CubeStorm", cubestorm, cube)
projects / xscreensaver / blobdiff