static const char sccsid[] = "@(#)hypertorus.c 1.2 05/09/28 xlockmore";
#endif
-/* Copyright (c) 2003-2005 Carsten Steger <carsten@mirsanmir.org>. */
+/* Copyright (c) 2003-2007 Carsten Steger <carsten@mirsanmir.org>. */
/*
* Permission to use, copy, modify, and distribute this software and its
* C. Steger - 03/05/18: Initial version
* C. Steger - 05/09/28: Added the spirals appearance mode
* and trackball support
+ * C. Steger - 07/01/23: Improved 4d trackball support
*/
/*
#define DTHETA 2.1
#define DTHETA_STR "2.1"
-#define DEF_DISPLAY_MODE DISP_SURFACE_STR
+#define DEF_DISPLAY_MODE DISP_TRANSPARENT_STR
#define DEF_APPEARANCE APPEARANCE_BANDS_STR
#define DEF_COLORS COLORS_COLORWHEEL_STR
#define DEF_3D_PROJECTION DISP_3D_PERSPECTIVE_STR
#define DEF_DTHETA DTHETA_STR
#ifdef STANDALONE
-# define PROGCLASS "Hypertorus"
-# define HACK_INIT init_hypertorus
-# define HACK_DRAW draw_hypertorus
-# define HACK_RESHAPE reshape_hypertorus
-# define HACK_HANDLE_EVENT hypertorus_handle_event
-# define EVENT_MASK PointerMotionMask|KeyReleaseMask
-# define hypertorus_opts xlockmore_opts
# define DEFAULTS "*delay: 25000 \n" \
"*showFPS: False \n" \
+# define refresh_hypertorus 0
# include "xlockmore.h" /* from the xscreensaver distribution */
#else /* !STANDALONE */
# include "xlock.h" /* from the xlockmore distribution */
#ifdef USE_GL
#include <X11/keysym.h>
-#include <GL/gl.h>
-#include <GL/glu.h>
+
#include "gltrackball.h"
static float speed_xz;
static float speed_yz;
-/* 4D rotation angles */
-static float alpha, beta, delta, zeta, eta, theta;
-static float aspect;
-
-/* Trackball states */
-trackball_state *trackballs[2];
-int current_trackball;
-Bool button_pressed;
-
static const float offset4d[4] = { 0.0, 0.0, 0.0, 2.0 };
static const float offset3d[4] = { 0.0, 0.0, -2.0, 0.0 };
static XrmOptionDescRec opts[] =
{
+ {"-mode", ".hypertorus.displayMode", XrmoptionSepArg, 0 },
{"-wireframe", ".hypertorus.displayMode", XrmoptionNoArg,
DISP_WIREFRAME_STR },
{"-surface", ".hypertorus.displayMode", XrmoptionNoArg,
DISP_SURFACE_STR },
{"-transparent", ".hypertorus.displayMode", XrmoptionNoArg,
DISP_TRANSPARENT_STR },
+
+ {"-appearance", ".hypertorus.appearance", XrmoptionSepArg, 0 },
{"-solid", ".hypertorus.appearance", XrmoptionNoArg,
APPEARANCE_SOLID_STR },
{"-bands", ".hypertorus.appearance", XrmoptionNoArg,
{ "-speed-yz <arg>", "rotation speed around the yz plane" }
};
-ModeSpecOpt hypertorus_opts =
+ENTRYPOINT ModeSpecOpt hypertorus_opts =
{sizeof opts / sizeof opts[0], opts, sizeof vars / sizeof vars[0], vars, desc};
typedef struct {
- GLint WindH, WindW;
+ GLint WindH, WindW;
GLXContext *glx_context;
+ /* 4D rotation angles */
+ float alpha, beta, delta, zeta, eta, theta;
+ /* Aspect ratio of the current window */
+ float aspect;
+ /* Trackball states */
+ trackball_state *trackballs[2];
+ int current_trackball;
+ Bool button_pressed;
+
+ float speed_scale;
+
} hypertorusstruct;
static hypertorusstruct *hyper = (hypertorusstruct *) NULL;
rotatewx(m,al);
rotatewy(m,be);
rotatewz(m,de);
- rotatexy(m,ze);
rotatexz(m,et);
+ rotatexy(m,ze);
rotateyz(m,th);
}
r12 = 2.0*(q[1]*q[2]+q[0]*q[3]);
r22 = 1.0-2.0*(q[1]*q[1]+q[0]*q[0]);
- ze = atan2(-r12,r22)*180.0/M_PI;
- et = atan2(r02,sqrt(r00*r00+r01*r01))*180.0/M_PI;
- th = atan2(-r01,r00)*180.0/M_PI;
+ et = atan2(-r12,r22)*180.0/M_PI;
+ th = atan2(r02,sqrt(r00*r00+r01*r01))*180.0/M_PI;
+ ze = atan2(-r01,r00)*180.0/M_PI;
- rotateall(al,be,de,ze,et,th,m);
+ rotateall(al,be,de,ze,et,-th,m);
}
will only work correctly if numu and numv are set to 64 or any higher
power of 2. Similarly, the banded appearance will only work correctly
if numu and numv are divisible by 4. */
-static void hypertorus(double umin, double umax, double vmin, double vmax,
- int numu, int numv)
+static void hypertorus(ModeInfo *mi, double umin, double umax, double vmin,
+ double vmax, int numu, int numv)
{
- static GLfloat mat_diff_red[] = { 1.0, 0.0, 0.0, 1.0 };
- static GLfloat mat_diff_green[] = { 0.0, 1.0, 0.0, 1.0 };
- static GLfloat mat_diff_trans_red[] = { 1.0, 0.0, 0.0, 0.7 };
- static GLfloat mat_diff_trans_green[] = { 0.0, 1.0, 0.0, 0.7 };
+ static const GLfloat mat_diff_red[] = { 1.0, 0.0, 0.0, 1.0 };
+ static const GLfloat mat_diff_green[] = { 0.0, 1.0, 0.0, 1.0 };
+ static const GLfloat mat_diff_trans_red[] = { 1.0, 0.0, 0.0, 0.7 };
+ static const GLfloat mat_diff_trans_green[] = { 0.0, 1.0, 0.0, 0.7 };
float p[3], pu[3], pv[3], n[3], mat[4][4];
int i, j, k, l, m, b, skew;
double u, v, ur, vr;
double xx[4], xxu[4], xxv[4], x[4], xu[4], xv[4];
double r, s, t;
float q1[4], q2[4], r1[4][4], r2[4][4];
+ hypertorusstruct *hp = &hyper[MI_SCREEN(mi)];
- rotateall(alpha,beta,delta,zeta,eta,theta,r1);
+ rotateall(hp->alpha,hp->beta,hp->delta,hp->zeta,hp->eta,hp->theta,r1);
- gltrackball_get_quaternion(trackballs[0],q1);
- gltrackball_get_quaternion(trackballs[1],q2);
+ gltrackball_get_quaternion(hp->trackballs[0],q1);
+ gltrackball_get_quaternion(hp->trackballs[1],q2);
quats_to_rotmat(q1,q2,r2);
mult_rotmat(r2,r1,mat);
static void init(ModeInfo *mi)
{
- static GLfloat light_ambient[] = { 0.0, 0.0, 0.0, 1.0 };
- static GLfloat light_diffuse[] = { 1.0, 1.0, 1.0, 1.0 };
- static GLfloat light_specular[] = { 1.0, 1.0, 1.0, 1.0 };
- static GLfloat light_position[] = { 1.0, 1.0, 1.0, 0.0 };
- static GLfloat mat_specular[] = { 1.0, 1.0, 1.0, 1.0 };
+ static const GLfloat light_ambient[] = { 0.0, 0.0, 0.0, 1.0 };
+ static const GLfloat light_diffuse[] = { 1.0, 1.0, 1.0, 1.0 };
+ static const GLfloat light_specular[] = { 1.0, 1.0, 1.0, 1.0 };
+ static const GLfloat light_position[] = { 1.0, 1.0, 1.0, 0.0 };
+ static const GLfloat mat_specular[] = { 1.0, 1.0, 1.0, 1.0 };
+ hypertorusstruct *hp = &hyper[MI_SCREEN(mi)];
if (appearance >= APPEARANCE_SPIRALS_1)
{
num_spirals = 0;
}
- alpha = 0.0;
- beta = 0.0;
- delta = 0.0;
- zeta = 0.0;
- eta = 0.0;
- theta = 0.0;
+ hp->alpha = 0.0;
+ hp->beta = 0.0;
+ hp->delta = 0.0;
+ hp->zeta = 0.0;
+ hp->eta = 0.0;
+ hp->theta = 0.0;
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
/* Redisplay the hypertorus. */
-static void display_hypertorus(void)
+static void display_hypertorus(ModeInfo *mi)
{
- if (!button_pressed)
+ hypertorusstruct *hp = &hyper[MI_SCREEN(mi)];
+
+ if (!hp->button_pressed)
{
- alpha += speed_wx;
- if (alpha >= 360.0)
- alpha -= 360.0;
- beta += speed_wy;
- if (beta >= 360.0)
- beta -= 360.0;
- delta += speed_wz;
- if (delta >= 360.0)
- delta -= 360.0;
- zeta += speed_xy;
- if (zeta >= 360.0)
- zeta -= 360.0;
- eta += speed_xz;
- if (eta >= 360.0)
- eta -= 360.0;
- theta += speed_yz;
- if (theta >= 360.0)
- theta -= 360.0;
+ hp->alpha += speed_wx * hp->speed_scale;
+ if (hp->alpha >= 360.0)
+ hp->alpha -= 360.0;
+ hp->beta += speed_wy * hp->speed_scale;
+ if (hp->beta >= 360.0)
+ hp->beta -= 360.0;
+ hp->delta += speed_wz * hp->speed_scale;
+ if (hp->delta >= 360.0)
+ hp->delta -= 360.0;
+ hp->zeta += speed_xy * hp->speed_scale;
+ if (hp->zeta >= 360.0)
+ hp->zeta -= 360.0;
+ hp->eta += speed_xz * hp->speed_scale;
+ if (hp->eta >= 360.0)
+ hp->eta -= 360.0;
+ hp->theta += speed_yz * hp->speed_scale;
+ if (hp->theta >= 360.0)
+ hp->theta -= 360.0;
}
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
if (projection_3d == DISP_3D_ORTHOGRAPHIC)
{
- if (aspect >= 1.0)
- glOrtho(-aspect,aspect,-1.0,1.0,0.1,100.0);
+ if (hp->aspect >= 1.0)
+ glOrtho(-hp->aspect,hp->aspect,-1.0,1.0,0.1,100.0);
else
- glOrtho(-1.0,1.0,-1.0/aspect,1.0/aspect,0.1,100.0);
+ glOrtho(-1.0,1.0,-1.0/hp->aspect,1.0/hp->aspect,0.1,100.0);
}
else
{
- gluPerspective(60.0,aspect,0.1,100.0);
+ gluPerspective(60.0,hp->aspect,0.1,100.0);
}
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
- hypertorus(0.0,2.0*M_PI,0.0,2.0*M_PI,64,64);
+ hypertorus(mi,0.0,2.0*M_PI,0.0,2.0*M_PI,64,64);
}
-void reshape_hypertorus(ModeInfo * mi, int width, int height)
+ENTRYPOINT void reshape_hypertorus(ModeInfo *mi, int width, int height)
{
hypertorusstruct *hp = &hyper[MI_SCREEN(mi)];
hp->WindW = (GLint)width;
hp->WindH = (GLint)height;
glViewport(0,0,width,height);
- aspect = (GLfloat)width/(GLfloat)height;
+ hp->aspect = (GLfloat)width/(GLfloat)height;
}
-Bool hypertorus_handle_event(ModeInfo *mi, XEvent *event)
+ENTRYPOINT Bool hypertorus_handle_event(ModeInfo *mi, XEvent *event)
{
Display *display = MI_DISPLAY(mi);
+ hypertorusstruct *hp = &hyper[MI_SCREEN(mi)];
KeySym sym;
if (event->xany.type == ButtonPress &&
event->xbutton.button == Button1)
{
- button_pressed = True;
- gltrackball_start(trackballs[current_trackball],
+ hp->button_pressed = True;
+ gltrackball_start(hp->trackballs[hp->current_trackball],
event->xbutton.x, event->xbutton.y,
MI_WIDTH(mi), MI_HEIGHT(mi));
return True;
else if (event->xany.type == ButtonRelease &&
event->xbutton.button == Button1)
{
- button_pressed = False;
+ hp->button_pressed = False;
return True;
}
else if (event->xany.type == KeyPress)
sym = XKeycodeToKeysym(display,event->xkey.keycode,0);
if (sym == XK_Shift_L || sym == XK_Shift_R)
{
- current_trackball = 1;
- if (button_pressed)
- gltrackball_start(trackballs[current_trackball],
+ hp->current_trackball = 1;
+ if (hp->button_pressed)
+ gltrackball_start(hp->trackballs[hp->current_trackball],
event->xbutton.x, event->xbutton.y,
MI_WIDTH(mi), MI_HEIGHT(mi));
return True;
sym = XKeycodeToKeysym(display,event->xkey.keycode,0);
if (sym == XK_Shift_L || sym == XK_Shift_R)
{
- current_trackball = 0;
- if (button_pressed)
- gltrackball_start(trackballs[current_trackball],
+ hp->current_trackball = 0;
+ if (hp->button_pressed)
+ gltrackball_start(hp->trackballs[hp->current_trackball],
event->xbutton.x, event->xbutton.y,
MI_WIDTH(mi), MI_HEIGHT(mi));
return True;
}
}
- else if (event->xany.type == MotionNotify && button_pressed)
+ else if (event->xany.type == MotionNotify && hp->button_pressed)
{
- gltrackball_track(trackballs[current_trackball],
+ gltrackball_track(hp->trackballs[hp->current_trackball],
event->xmotion.x, event->xmotion.y,
MI_WIDTH(mi), MI_HEIGHT(mi));
return True;
*-----------------------------------------------------------------------------
*/
-void init_hypertorus(ModeInfo * mi)
+ENTRYPOINT void init_hypertorus(ModeInfo *mi)
{
hypertorusstruct *hp;
}
hp = &hyper[MI_SCREEN(mi)];
- trackballs[0] = gltrackball_init();
- trackballs[1] = gltrackball_init();
- current_trackball = 0;
- button_pressed = False;
+
+ hp->trackballs[0] = gltrackball_init();
+ hp->trackballs[1] = gltrackball_init();
+ hp->current_trackball = 0;
+ hp->button_pressed = False;
+
+ /* make multiple screens rotate at slightly different rates. */
+ hp->speed_scale = 0.9 + frand(0.3);
if ((hp->glx_context = init_GL(mi)) != NULL)
{
* Called by the mainline code periodically to update the display.
*-----------------------------------------------------------------------------
*/
-void draw_hypertorus(ModeInfo * mi)
+ENTRYPOINT void draw_hypertorus(ModeInfo *mi)
{
Display *display = MI_DISPLAY(mi);
Window window = MI_WINDOW(mi);
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
glLoadIdentity();
- display_hypertorus();
+ display_hypertorus(mi);
if (MI_IS_FPS(mi))
do_fps (mi);
*-----------------------------------------------------------------------------
*/
-void release_hypertorus(ModeInfo * mi)
+ENTRYPOINT void release_hypertorus(ModeInfo *mi)
{
if (hyper != NULL)
{
FreeAllGL(mi);
}
-void change_hypertorus(ModeInfo * mi)
+#ifndef STANDALONE
+ENTRYPOINT void change_hypertorus(ModeInfo *mi)
{
hypertorusstruct *hp = &hyper[MI_SCREEN(mi)];
glXMakeCurrent(MI_DISPLAY(mi),MI_WINDOW(mi),*(hp->glx_context));
init(mi);
}
+#endif /* !STANDALONE */
+
+XSCREENSAVER_MODULE ("Hypertorus", hypertorus)
#endif /* USE_GL */
projects / xscreensaver / blobdiff