diff options
Diffstat (limited to 'hacks/glx/glknots.c')
| -rw-r--r-- | hacks/glx/glknots.c | 454 |
1 files changed, 0 insertions, 454 deletions
diff --git a/hacks/glx/glknots.c b/hacks/glx/glknots.c deleted file mode 100644 index 5bcb97f..0000000 --- a/hacks/glx/glknots.c +++ /dev/null @@ -1,454 +0,0 @@ -/* glknots, Copyright (c) 2003-2014 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 - * the above copyright notice appear in all copies and that both that - * copyright notice and this permission notice appear in supporting - * documentation. No representations are made about the suitability of this - * software for any purpose. It is provided "as is" without express or - * implied warranty. - * - * Generates some 3D knots (closed loops). - * Inspired by Paul Bourke <pbourke@swin.edu.au> at - * http://astronomy.swin.edu.au/~pbourke/curves/knot/ - */ - -#define DEFAULTS "*delay: 30000 \n" \ - "*showFPS: False \n" \ - "*wireframe: False \n" \ - "*suppressRotationAnimation: True\n" \ - -# define release_knot 0 - -#include "xlockmore.h" -#include "colors.h" -#include "tube.h" -#include "rotator.h" -#include "gltrackball.h" -#include <ctype.h> - -#ifdef USE_GL /* whole file */ - -#define DEF_SPIN "XYZ" -#define DEF_WANDER "True" -#define DEF_SPEED "1.0" -#define DEF_THICKNESS "0.3" -#define DEF_SEGMENTS "800" -#define DEF_DURATION "8" - -typedef struct { - GLXContext *glx_context; - rotator *rot; - trackball_state *trackball; - Bool button_down_p; - - GLuint knot_list; - - int ncolors; - XColor *colors; - int ccolor; - - int mode; /* 0 = normal, 1 = out, 2 = in */ - int mode_tick; - Bool clear_p; - - time_t last_time; - int draw_tick; - -} knot_configuration; - -static knot_configuration *bps = NULL; - -static char *do_spin; -static GLfloat speed; -static Bool do_wander; -static GLfloat thickness; -static unsigned int segments; -static int duration; - -static XrmOptionDescRec opts[] = { - { "-spin", ".spin", XrmoptionSepArg, 0 }, - { "+spin", ".spin", XrmoptionNoArg, "" }, - { "-wander", ".wander", XrmoptionNoArg, "True" }, - { "+wander", ".wander", XrmoptionNoArg, "False" }, - { "-speed", ".speed", XrmoptionSepArg, 0 }, - { "-thickness", ".thickness", XrmoptionSepArg, 0 }, - { "-segments", ".segments", XrmoptionSepArg, 0 }, - { "-duration", ".duration", XrmoptionSepArg, 0 }, -}; - -static argtype vars[] = { - {&do_spin, "spin", "Spin", DEF_SPIN, t_String}, - {&do_wander, "wander", "Wander", DEF_WANDER, t_Bool}, - {&speed, "speed", "Speed", DEF_SPEED, t_Float}, - {&thickness, "thickness", "Thickness", DEF_THICKNESS, t_Float}, - {&segments, "segments", "Segments", DEF_SEGMENTS, t_Int}, - {&duration, "duration", "Duration", DEF_DURATION, t_Int}, -}; - -ENTRYPOINT ModeSpecOpt knot_opts = {countof(opts), opts, countof(vars), vars, NULL}; - - -static void -make_knot (ModeInfo *mi) -{ - int wire = MI_IS_WIREFRAME(mi); - - GLfloat diam = (4 * thickness); - int faces = (wire ? 3 : 6); - - unsigned int i; - double x, y, z, ox=0, oy=0, oz=0; - double mu; - - double p[9]; - - Bool blobby_p = (0 == (random() % 5)); - Bool type = (random() % 2); - - for (i = 0; i < countof(p); i++) - { - p[i] = 1 + (random() % 4); - if (! (random() % 3)) - p[i] += (random() % 5); - } - - if (type == 1) - { - p[0] += 4; - p[1] *= ((p[0] + p[0]) / 10); - blobby_p = False; - } - - mi->polygon_count = 0; - - for (i = 0; i <= segments; i++) - { - if (type == 0) - { - mu = i * (M_PI * 2) / segments; - x = 10 * (cos(mu) + cos(p[0]*mu)) + cos(p[1]*mu) + cos(p[2]*mu); - y = 6 * sin(mu) + 10 * sin(p[3]*mu); - z = 16 * sin(p[4]*mu) * sin(p[5]*mu/2) + p[6]*sin(p[7]*mu) - - 2 * sin(p[8]*mu); - } - else if (type == 1) - { - mu = i * (M_PI * 2) * p[0] / (double) segments; - x = 10 * cos(mu) * (1 + cos(p[1] * mu/ p[0]) / 2.0); - y = 25 * sin(p[1] * mu / p[0]) / 2.0; - z = 10 * sin(mu) * (1 + cos(p[1] * mu/ p[0]) / 2.0); - } - else - abort(); - - if (i != 0) - { - GLfloat dist = sqrt ((x-ox)*(x-ox) + - (y-oy)*(y-oy) + - (z-oz)*(z-oz)); - GLfloat di; - if (!blobby_p) - di = diam; - else - { - di = dist * (segments / 500.0); - di = (di * di * 3); - } - - mi->polygon_count += tube (ox, oy, oz, - x, y, z, - di, dist/3, - faces, True, wire, wire); - } - - ox = x; - oy = y; - oz = z; - } -} - - -/* Window management, etc - */ -ENTRYPOINT void -reshape_knot (ModeInfo *mi, int width, int height) -{ - GLfloat h = (GLfloat) height / (GLfloat) width; - int y = 0; - - if (width > height * 5) { /* tiny window: show middle */ - height = width * 9/16; - y = -height/2; - h = height / (GLfloat) width; - } - - glViewport (0, y, (GLint) width, (GLint) height); - - glMatrixMode(GL_PROJECTION); - glLoadIdentity(); - gluPerspective (30.0, 1/h, 1.0, 100.0); - - glMatrixMode(GL_MODELVIEW); - glLoadIdentity(); - gluLookAt( 0.0, 0.0, 30.0, - 0.0, 0.0, 0.0, - 0.0, 1.0, 0.0); - - { - GLfloat s = (MI_WIDTH(mi) < MI_HEIGHT(mi) - ? (MI_WIDTH(mi) / (GLfloat) MI_HEIGHT(mi)) - : 1); - glScalef (s, s, s); - } - - glClear(GL_COLOR_BUFFER_BIT); -} - - -static void -new_knot (ModeInfo *mi) -{ - knot_configuration *bp = &bps[MI_SCREEN(mi)]; - int i; - - bp->clear_p = !!(random() % 15); - - bp->ncolors = 128; - bp->colors = (XColor *) calloc(bp->ncolors, sizeof(XColor)); - make_smooth_colormap (0, 0, 0, - bp->colors, &bp->ncolors, - False, 0, False); - - for (i = 0; i < bp->ncolors; i++) - { - /* make colors twice as bright */ - bp->colors[i].red = (bp->colors[i].red >> 2) + 0x7FFF; - bp->colors[i].green = (bp->colors[i].green >> 2) + 0x7FFF; - bp->colors[i].blue = (bp->colors[i].blue >> 2) + 0x7FFF; - } - - glNewList (bp->knot_list, GL_COMPILE); - make_knot (mi); - glEndList (); -} - - -ENTRYPOINT Bool -knot_handle_event (ModeInfo *mi, XEvent *event) -{ - knot_configuration *bp = &bps[MI_SCREEN(mi)]; - - if (gltrackball_event_handler (event, bp->trackball, - MI_WIDTH (mi), MI_HEIGHT (mi), - &bp->button_down_p)) - return True; - else if (screenhack_event_helper (MI_DISPLAY(mi), MI_WINDOW(mi), event)) - { - bp->last_time = 1; - return True; - } - - return False; -} - - - -ENTRYPOINT void -init_knot (ModeInfo *mi) -{ - knot_configuration *bp; - int wire = MI_IS_WIREFRAME(mi); - - MI_INIT (mi, bps); - - bp = &bps[MI_SCREEN(mi)]; - - bp->glx_context = init_GL(mi); - - if (thickness <= 0) thickness = 0.001; - else if (thickness > 1) thickness = 1; - - if (segments < 10) segments = 10; - - reshape_knot (mi, MI_WIDTH(mi), MI_HEIGHT(mi)); - - if (!wire) - { - GLfloat pos[4] = {1.0, 1.0, 1.0, 0.0}; - GLfloat amb[4] = {0.0, 0.0, 0.0, 1.0}; - GLfloat dif[4] = {1.0, 1.0, 1.0, 1.0}; - GLfloat spc[4] = {0.0, 1.0, 1.0, 1.0}; - - glEnable(GL_LIGHTING); - glEnable(GL_LIGHT0); - glEnable(GL_DEPTH_TEST); - glEnable(GL_CULL_FACE); - - glLightfv(GL_LIGHT0, GL_POSITION, pos); - glLightfv(GL_LIGHT0, GL_AMBIENT, amb); - glLightfv(GL_LIGHT0, GL_DIFFUSE, dif); - glLightfv(GL_LIGHT0, GL_SPECULAR, spc); - } - - { - Bool spinx=False, spiny=False, spinz=False; - double spin_speed = 2.0; - double wander_speed = 0.05; - double spin_accel = 0.2; - - char *s = do_spin; - while (*s) - { - if (*s == 'x' || *s == 'X') spinx = True; - else if (*s == 'y' || *s == 'Y') spiny = True; - else if (*s == 'z' || *s == 'Z') spinz = True; - else if (*s == '0') ; - else - { - fprintf (stderr, - "%s: spin must contain only the characters X, Y, or Z (not \"%s\")\n", - progname, do_spin); - exit (1); - } - s++; - } - - bp->rot = make_rotator (spinx ? spin_speed : 0, - spiny ? spin_speed : 0, - spinz ? spin_speed : 0, - spin_accel, - do_wander ? wander_speed : 0, - (spinx && spiny && spinz)); - bp->trackball = gltrackball_init (True); - } - - bp->knot_list = glGenLists (1); - new_knot(mi); - - glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); -} - - -ENTRYPOINT void -draw_knot (ModeInfo *mi) -{ - knot_configuration *bp = &bps[MI_SCREEN(mi)]; - Display *dpy = MI_DISPLAY(mi); - Window window = MI_WINDOW(mi); - - 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; - - if (!bp->glx_context) - return; - - glXMakeCurrent(MI_DISPLAY(mi), MI_WINDOW(mi), *bp->glx_context); - - if (bp->mode == 0) - { - if (bp->draw_tick++ > 10) - { - time_t now = time((time_t *) 0); - if (bp->last_time == 0) bp->last_time = now; - bp->draw_tick = 0; - if (!bp->button_down_p && - now - bp->last_time >= duration) - { - bp->mode = 1; /* go out */ - bp->mode_tick = 10 / speed; - bp->last_time = now; - } - } - } - else if (bp->mode == 1) /* out */ - { - if (--bp->mode_tick <= 0) - { - new_knot (mi); - bp->mode_tick = 10 / speed; - bp->mode = 2; /* go in */ - } - } - else if (bp->mode == 2) /* in */ - { - if (--bp->mode_tick <= 0) - bp->mode = 0; /* normal */ - } - else - abort(); - - glShadeModel(GL_SMOOTH); - - glEnable(GL_DEPTH_TEST); - glEnable(GL_NORMALIZE); - glEnable(GL_CULL_FACE); - - if (bp->clear_p) - glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); - - glPushMatrix (); - - { - double x, y, z; - get_position (bp->rot, &x, &y, &z, !bp->button_down_p); - glTranslatef((x - 0.5) * 8, - (y - 0.5) * 8, - (z - 0.5) * 15); - - gltrackball_rotate (bp->trackball); - - get_rotation (bp->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); - } - - bcolor[0] = bp->colors[bp->ccolor].red / 65536.0; - bcolor[1] = bp->colors[bp->ccolor].green / 65536.0; - bcolor[2] = bp->colors[bp->ccolor].blue / 65536.0; - bp->ccolor++; - if (bp->ccolor >= bp->ncolors) bp->ccolor = 0; - - glMaterialfv (GL_FRONT, GL_SPECULAR, bspec); - glMateriali (GL_FRONT, GL_SHININESS, bshiny); - glMaterialfv (GL_FRONT, GL_AMBIENT_AND_DIFFUSE, bcolor); - - glScalef(0.25, 0.25, 0.25); - - if (bp->mode != 0) - { - GLfloat s = (bp->mode == 1 - ? bp->mode_tick / (10 / speed) - : ((10 / speed) - bp->mode_tick + 1) / (10 / speed)); - glScalef (s, s, s); - } - - glCallList (bp->knot_list); - - glPopMatrix (); - - if (mi->fps_p) do_fps (mi); - glFinish(); - - glXSwapBuffers(dpy, window); -} - - -ENTRYPOINT void -free_knot (ModeInfo *mi) -{ - knot_configuration *bp = &bps[MI_SCREEN(mi)]; - if (!bp->glx_context) return; - glXMakeCurrent(MI_DISPLAY(mi), MI_WINDOW(mi), *bp->glx_context); - if (bp->trackball) gltrackball_free (bp->trackball); - if (bp->rot) free_rotator (bp->rot); - if (bp->colors) free (bp->colors); - if (glIsList(bp->knot_list)) glDeleteLists(bp->knot_list, 1); -} - -XSCREENSAVER_MODULE_2 ("GLKnots", glknots, knot) - -#endif /* USE_GL */ |