/* -*- Mode: C; tab-width: 4 -*- */
/* gears --- 3D gear wheels */
-#if !defined( lint ) && !defined( SABER )
+#if 0
static const char sccsid[] = "@(#)gears.c 4.07 97/11/24 xlockmore";
-
#endif
/*-
* been fixed in MesaGL 2.2 and later releases.
*/
-/*-
- * due to a Bug/feature in VMS X11/Intrinsic.h has to be placed before xlock.
- * otherwise caddr_t is not defined correctly
- */
-
-#include <X11/Intrinsic.h>
-
#ifdef STANDALONE
-# define PROGCLASS "Gears"
-# define HACK_INIT init_gears
-# define HACK_DRAW draw_gears
-# define HACK_RESHAPE reshape_gears
-# define gears_opts xlockmore_opts
-# define DEFAULTS "*count: 1 \n" \
+# define DEFAULTS "*count: 1000000 \n" \
"*cycles: 2 \n" \
"*delay: 20000 \n" \
- "*planetary: False \n" \
"*showFPS: False \n" \
"*wireframe: False \n"
# include "xlockmore.h" /* from the xscreensaver distribution */
+# define refresh_gears 0
#else /* !STANDALONE */
# include "xlock.h" /* from the xlockmore distribution */
#endif /* !STANDALONE */
#ifdef USE_GL
+#include "rotator.h"
+#include "gltrackball.h"
+
#undef countof
#define countof(x) (sizeof((x))/sizeof((*x)))
-#define DEF_PLANETARY "False"
+#define DEF_MODE "random"
+#define DEF_SPIN "True"
-static int planetary;
+static char *mode_str;
+static int spin;
static XrmOptionDescRec opts[] = {
- {"-planetary", ".gears.planetary", XrmoptionNoArg, (caddr_t) "true" },
- {"+planetary", ".gears.planetary", XrmoptionNoArg, (caddr_t) "false" },
+ {"-mode", ".gears.mode", XrmoptionSepArg, 0 },
+ {"-planetary", ".gears.mode", XrmoptionNoArg, "planetary" },
+ {"-simple", ".gears.mode", XrmoptionNoArg, "simple" },
+ {"-spin", ".gears.spin", XrmoptionNoArg, "true" },
+ {"+spin", ".gears.spin", XrmoptionNoArg, "false" },
};
static argtype vars[] = {
- {(caddr_t *) &planetary, "planetary", "Planetary", DEF_PLANETARY, t_Bool},
+ {&mode_str, "mode", "Mode", DEF_MODE, t_String},
+ {&spin, "spin", "Spin", DEF_SPIN, t_Bool},
};
-ModeSpecOpt gears_opts = {countof(opts), opts, countof(vars), vars, NULL};
+ENTRYPOINT ModeSpecOpt gears_opts = {countof(opts), opts, countof(vars), vars, NULL};
#ifdef USE_MODULES
ModStruct gears_description =
typedef struct {
-
- GLfloat rotx, roty, rotz; /* current object rotation */
- GLfloat dx, dy, dz; /* current rotational velocity */
- GLfloat ddx, ddy, ddz; /* current rotational acceleration */
- GLfloat d_max; /* max velocity */
-
GLuint gear1, gear2, gear3;
GLuint gear_inner, gear_outer;
GLuint armature;
GLfloat angle;
GLXContext *glx_context;
Window window;
+ rotator *rot;
+ trackball_state *trackball;
+ Bool button_down_p;
+ int planetary_p;
} gearsstruct;
static gearsstruct *gears = NULL;
glPushMatrix();
- {
- GLfloat x = gp->rotx;
- GLfloat y = gp->roty;
- GLfloat z = gp->rotz;
- if (x < 0) x = 1 - (x + 1);
- if (y < 0) y = 1 - (y + 1);
- if (z < 0) z = 1 - (z + 1);
- 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);
- }
+ gltrackball_rotate (gp->trackball);
- if (!planetary) {
+ if (spin)
+ {
+ double x, y, z;
+ get_rotation (gp->rot, &x, &y, &z, !gp->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);
+ }
+
+ if (!gp->planetary_p) {
glPushMatrix();
glTranslatef(-3.0, -2.0, 0.0);
glRotatef(gp->angle, 0.0, 0.0, 1.0);
glCallList(gp->gear3);
glPopMatrix();
- } else { /* planetary */
+ } else { /* gp->planetary_p */
glScalef(0.8, 0.8, 0.8);
/* new window size or exposure */
-void
-reshape_gears(ModeInfo *mi, int width, int height)
+ENTRYPOINT void
+reshape_gears (ModeInfo *mi, int width, int height)
{
GLfloat h = (GLfloat) height / (GLfloat) width;
pinit(ModeInfo * mi)
{
gearsstruct *gp = &gears[MI_SCREEN(mi)];
- static GLfloat pos[4] =
- {5.0, 5.0, 10.0, 1.0};
- static GLfloat red[4] =
- {0.8, 0.1, 0.0, 1.0};
- static GLfloat green[4] =
- {0.0, 0.8, 0.2, 1.0};
- static GLfloat blue[4] =
- {0.2, 0.2, 1.0, 1.0};
- static GLfloat gray[4] =
- {0.5, 0.5, 0.5, 1.0};
- static GLfloat white[4] =
- {1.0, 1.0, 1.0, 1.0};
+ static const GLfloat pos[4] = {5.0, 5.0, 10.0, 1.0};
+ static const GLfloat red[4] = {0.8, 0.1, 0.0, 1.0};
+ static const GLfloat green[4] = {0.0, 0.8, 0.2, 1.0};
+ static const GLfloat blue[4] = {0.2, 0.2, 1.0, 1.0};
+ static const GLfloat gray[4] = {0.5, 0.5, 0.5, 1.0};
+ static const GLfloat white[4] = {1.0, 1.0, 1.0, 1.0};
int wire = MI_IS_WIREFRAME(mi);
int mono = MI_IS_MONO(mi);
/* make the gears */
- if (! planetary) {
+ if (! gp->planetary_p) {
gp->gear1 = glGenLists(1);
glNewList(gp->gear1, GL_COMPILE);
if (!wire)
glEnable(GL_NORMALIZE);
- } else { /* planetary */
+ } else { /* gp->planetary_p */
gp->gear1 = glGenLists(1);
glNewList(gp->gear1, GL_COMPILE);
}
-/* lifted from lament.c */
-#define RAND(n) ((long) ((random() & 0x7fffffff) % ((long) (n))))
-#define RANDSIGN() ((random() & 1) ? 1 : -1)
-
-static void
-rotate(GLfloat *pos, GLfloat *v, GLfloat *dv, GLfloat max_v)
+ENTRYPOINT Bool
+gears_handle_event (ModeInfo *mi, XEvent *event)
{
- double ppos = *pos;
-
- /* tick position */
- if (ppos < 0)
- ppos = -(ppos + *v);
- else
- ppos += *v;
-
- if (ppos > 1.0)
- ppos -= 1.0;
- else if (ppos < 0)
- ppos += 1.0;
+ gearsstruct *gp = &gears[MI_SCREEN(mi)];
- if (ppos < 0) abort();
- if (ppos > 1.0) abort();
- *pos = (*pos > 0 ? ppos : -ppos);
-
- /* accelerate */
- *v += *dv;
-
- /* clamp velocity */
- if (*v > max_v || *v < -max_v)
+ if (event->xany.type == ButtonPress &&
+ event->xbutton.button == Button1)
{
- *dv = -*dv;
+ gp->button_down_p = True;
+ gltrackball_start (gp->trackball,
+ event->xbutton.x, event->xbutton.y,
+ MI_WIDTH (mi), MI_HEIGHT (mi));
+ return True;
}
- /* If it stops, start it going in the other direction. */
- else if (*v < 0)
+ else if (event->xany.type == ButtonRelease &&
+ event->xbutton.button == Button1)
{
- if (random() % 4)
- {
- *v = 0;
-
- /* keep going in the same direction */
- if (random() % 2)
- *dv = 0;
- else if (*dv < 0)
- *dv = -*dv;
- }
- else
- {
- /* reverse gears */
- *v = -*v;
- *dv = -*dv;
- *pos = -*pos;
- }
+ gp->button_down_p = False;
+ return True;
}
-
- /* Alter direction of rotational acceleration randomly. */
- if (! (random() % 120))
- *dv = -*dv;
-
- /* Change acceleration very occasionally. */
- if (! (random() % 200))
+ else if (event->xany.type == ButtonPress &&
+ (event->xbutton.button == Button4 ||
+ event->xbutton.button == Button5))
+ {
+ gltrackball_mousewheel (gp->trackball, event->xbutton.button, 10,
+ !!event->xbutton.state);
+ return True;
+ }
+ else if (event->xany.type == MotionNotify &&
+ gp->button_down_p)
{
- if (*dv == 0)
- *dv = 0.00001;
- else if (random() & 1)
- *dv *= 1.2;
- else
- *dv *= 0.8;
+ gltrackball_track (gp->trackball,
+ event->xmotion.x, event->xmotion.y,
+ MI_WIDTH (mi), MI_HEIGHT (mi));
+ return True;
}
+
+ return False;
}
-void
-init_gears(ModeInfo * mi)
+ENTRYPOINT void
+init_gears (ModeInfo * mi)
{
int screen = MI_SCREEN(mi);
}
gp = &gears[screen];
- gp->window = MI_WINDOW(mi);
-
- gp->rotx = frand(1.0) * RANDSIGN();
- gp->roty = frand(1.0) * RANDSIGN();
- gp->rotz = frand(1.0) * RANDSIGN();
-
- /* bell curve from 0-1.5 degrees, avg 0.75 */
- gp->dx = (frand(1) + frand(1) + frand(1)) / (360*2);
- gp->dy = (frand(1) + frand(1) + frand(1)) / (360*2);
- gp->dz = (frand(1) + frand(1) + frand(1)) / (360*2);
+ if (mode_str && !strcasecmp (mode_str, "planetary"))
+ gp->planetary_p = True;
+ else if (mode_str && !strcasecmp (mode_str, "simple"))
+ gp->planetary_p = False;
+ else if (!mode_str || !*mode_str || !strcasecmp (mode_str, "random"))
+ gp->planetary_p = !(random() % 2);
+ else
+ fprintf (stderr, "%s: mode must be planetary, simple, or random",
+ progname);
- gp->d_max = gp->dx * 2;
+ gp->window = MI_WINDOW(mi);
- gp->ddx = 0.00006 + frand(0.00003);
- gp->ddy = 0.00006 + frand(0.00003);
- gp->ddz = 0.00006 + frand(0.00003);
+ gp->rot = make_rotator (1, 1, 1, 1, 0, True);
+ gp->trackball = gltrackball_init ();
if ((gp->glx_context = init_GL(mi)) != NULL) {
reshape_gears(mi, MI_WIDTH(mi), MI_HEIGHT(mi));
}
}
-void
-draw_gears(ModeInfo * mi)
+ENTRYPOINT void
+draw_gears (ModeInfo * mi)
{
gearsstruct *gp = &gears[MI_SCREEN(mi)];
Display *display = MI_DISPLAY(mi);
Window window = MI_WINDOW(mi);
int angle_incr = MI_CYCLES(mi) ? MI_CYCLES(mi) : 2;
- if (planetary)
+ if (gp->planetary_p)
angle_incr *= 3;
if (!gp->glx_context)
/* let's do something so we don't get bored */
gp->angle = (int) (gp->angle + angle_incr) % 360;
- rotate(&gp->rotx, &gp->dx, &gp->ddx, gp->d_max);
- rotate(&gp->roty, &gp->dy, &gp->ddy, gp->d_max);
- rotate(&gp->rotz, &gp->dz, &gp->ddz, gp->d_max);
-
if (mi->fps_p) do_fps (mi);
glFinish();
glXSwapBuffers(display, window);
}
-void
-release_gears(ModeInfo * mi)
+ENTRYPOINT void
+release_gears (ModeInfo * mi)
{
if (gears != NULL) {
int screen;
}
+XSCREENSAVER_MODULE ("Gears", gears)
+
/*********************************************************/
#endif
projects / xscreensaver / blobdiff