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Diffstat (limited to 'hacks/glx/moebiusgears.c')
| -rw-r--r-- | hacks/glx/moebiusgears.c | 445 |
1 files changed, 0 insertions, 445 deletions
diff --git a/hacks/glx/moebiusgears.c b/hacks/glx/moebiusgears.c deleted file mode 100644 index ee5478e..0000000 --- a/hacks/glx/moebiusgears.c +++ /dev/null @@ -1,445 +0,0 @@ -/* moebiusgears, Copyright (c) 2007-2014 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. - */ - -#define DEFAULTS "*delay: 30000 \n" \ - "*count: 17 \n" \ - "*showFPS: False \n" \ - "*wireframe: False \n" \ - "*suppressRotationAnimation: True\n" \ - -# define release_mgears 0 - -#include "xlockmore.h" -#include "involute.h" -#include "normals.h" -#include "rotator.h" -#include "gltrackball.h" -#include <ctype.h> - -#ifdef USE_GL /* whole file */ - - -#define DEF_SPIN "True" -#define DEF_WANDER "True" -#define DEF_ROLL "True" -#define DEF_SPEED "1.0" -#define DEF_TEETH "15" - -typedef struct { - - gear g; - GLfloat pos_th; /* position on ring of gear system */ - GLfloat pos_thz; /* rotation out of plane of gear system */ -} mogear; - -typedef struct { - GLXContext *glx_context; - rotator *rot; - trackball_state *trackball; - Bool button_down_p; - - int ngears; - mogear *gears; - GLfloat ring_r; /* radius of gear system */ - GLfloat roll_th; - -} mgears_configuration; - -static mgears_configuration *bps = NULL; - -static Bool do_spin; -static GLfloat speed; -static Bool do_wander; -static Bool do_roll; -static int teeth_arg; - -static XrmOptionDescRec opts[] = { - { "-spin", ".spin", XrmoptionNoArg, "True" }, - { "+spin", ".spin", XrmoptionNoArg, "False" }, - { "-speed", ".speed", XrmoptionSepArg, 0 }, - { "-wander", ".wander", XrmoptionNoArg, "True" }, - { "+wander", ".wander", XrmoptionNoArg, "False" }, - { "-roll", ".roll", XrmoptionNoArg, "True" }, - { "+roll", ".roll", XrmoptionNoArg, "False" }, - { "-teeth", ".teeth", XrmoptionSepArg, 0 }, -}; - -static argtype vars[] = { - {&do_spin, "spin", "Spin", DEF_SPIN, t_Bool}, - {&do_wander, "wander", "Wander", DEF_WANDER, t_Bool}, - {&do_roll, "roll", "Roll", DEF_ROLL, t_Bool}, - {&speed, "speed", "Speed", DEF_SPEED, t_Float}, - {&teeth_arg, "teeth", "Teeth", DEF_TEETH, t_Int}, -}; - -ENTRYPOINT ModeSpecOpt mgears_opts = {countof(opts), opts, countof(vars), vars, NULL}; - - -/* Window management, etc - */ -ENTRYPOINT void -reshape_mgears (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 -reset_mgears (ModeInfo *mi) -{ - mgears_configuration *bp = &bps[MI_SCREEN(mi)]; - int wire = MI_IS_WIREFRAME(mi); - int total_gears = MI_COUNT(mi); - double gears_per_turn; - double gear_r, tw, th, thick, slope; - int i, nubs, size; - - if (! (total_gears & 1)) - total_gears++; /* must be odd or gears intersect */ - - /* Number of teeth must be odd if number of gears is odd, or teeth don't - mesh when the loop closes. And since number of gears must be odd... - */ - if (! (teeth_arg & 1)) teeth_arg++; - if (teeth_arg < 7) teeth_arg = 7; - - if (total_gears < 13) /* gear mesh angle is too steep with less */ - total_gears = 13; - - thick = 0.2; - nubs = (random() & 3) ? 0 : (random() % teeth_arg) / 2; - - slope = 0; - - /* Sloping gears are incompatible with "-roll" ... */ - /* slope= -M_PI * 2 / total_gears; */ - - gears_per_turn = total_gears / 2.0; - - bp->ring_r = 3; - gear_r = M_PI * bp->ring_r / gears_per_turn; - tw = 0; - th = gear_r * 2.5 / teeth_arg; - - /* If the gears are small, use a lower density mesh. */ - size = (gear_r > 0.60 ? INVOLUTE_HUGE : - gear_r > 0.32 ? INVOLUTE_LARGE : - gear_r > 0.13 ? INVOLUTE_MEDIUM : - INVOLUTE_SMALL); - - /* If there are lots of teeth, use a lower density mesh. */ - if (teeth_arg > 77) - size = INVOLUTE_SMALL; - if (teeth_arg > 45 && size >= INVOLUTE_HUGE) - size = INVOLUTE_MEDIUM; - - if (bp->gears) - { - for (i = 0; i < bp->ngears; i++) - glDeleteLists (bp->gears[i].g.dlist, 1); - free (bp->gears); - bp->gears = 0; - } - - bp->ngears = total_gears; - - bp->gears = (mogear *) calloc (bp->ngears, sizeof(*bp->gears)); - for (i = 0; i < bp->ngears; i++) - { - mogear *mg = &bp->gears[i]; - gear *g = &mg->g; - - g->r = gear_r; - g->size = size; - g->nteeth = teeth_arg; - g->tooth_w = tw; - g->tooth_h = th; - g->tooth_slope = slope; - g->thickness = g->r * thick; - g->thickness2 = g->thickness * 0.1; - g->thickness3 = g->thickness; - g->inner_r = g->r * 0.80; - g->inner_r2 = g->r * 0.60; - g->inner_r3 = g->r * 0.55; - g->nubs = nubs; - mg->pos_th = (M_PI * 2 / gears_per_turn) * i; - mg->pos_thz = (M_PI / 2 / gears_per_turn) * i; - - g->th = ((i & 1) - ? (M_PI * 2 / g->nteeth) - : 0); - - /* Colorize - */ - g->color[0] = 0.7 + frand(0.3); - g->color[1] = 0.7 + frand(0.3); - g->color[2] = 0.7 + frand(0.3); - g->color[3] = 1.0; - - g->color2[0] = g->color[0] * 0.85; - g->color2[1] = g->color[1] * 0.85; - g->color2[2] = g->color[2] * 0.85; - g->color2[3] = g->color[3]; - - /* Now render the gear into its display list. - */ - g->dlist = glGenLists (1); - if (! g->dlist) - { - check_gl_error ("glGenLists"); - abort(); - } - - glNewList (g->dlist, GL_COMPILE); - g->polygons += draw_involute_gear (g, wire); - glEndList (); - } -} - - -ENTRYPOINT void -init_mgears (ModeInfo *mi) -{ - mgears_configuration *bp; - int wire = MI_IS_WIREFRAME(mi); - - MI_INIT (mi, bps); - - bp = &bps[MI_SCREEN(mi)]; - - bp->glx_context = init_GL(mi); - - reshape_mgears (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); - } - - { - double spin_speed = 0.5; - double wander_speed = 0.01; - double spin_accel = 2.0; - - bp->rot = make_rotator (do_spin ? spin_speed : 0, - do_spin ? spin_speed : 0, - do_spin ? spin_speed : 0, - spin_accel, - do_wander ? wander_speed : 0, - False /* don't randomize */ - ); - bp->trackball = gltrackball_init (True); - } - - reset_mgears (mi); -} - - -ENTRYPOINT Bool -mgears_handle_event (ModeInfo *mi, XEvent *event) -{ - mgears_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 (event->xany.type == KeyPress) - { - KeySym keysym; - char c = 0; - XLookupString (&event->xkey, &c, 1, &keysym, 0); - if (c == '+' || c == '=' || - keysym == XK_Up || keysym == XK_Right || keysym == XK_Next) - { - MI_COUNT(mi) += 2; - reset_mgears (mi); - return True; - } - else if (c == '-' || c == '_' || - keysym == XK_Down || keysym == XK_Left || keysym == XK_Prior) - { - if (MI_COUNT(mi) <= 13) - return False; - MI_COUNT(mi) -= 2; - reset_mgears (mi); - return True; - } - else if (screenhack_event_helper (MI_DISPLAY(mi), MI_WINDOW(mi), event)) - goto DEF; - } - else if (screenhack_event_helper (MI_DISPLAY(mi), MI_WINDOW(mi), event)) - { - DEF: - MI_COUNT(mi) = 13 + (2 * (random() % 10)); - reset_mgears (mi); - return True; - } - - return False; -} - - -ENTRYPOINT void -draw_mgears (ModeInfo *mi) -{ - mgears_configuration *bp = &bps[MI_SCREEN(mi)]; - Display *dpy = MI_DISPLAY(mi); - Window window = MI_WINDOW(mi); - int i; - - if (!bp->glx_context) - return; - - glXMakeCurrent(MI_DISPLAY(mi), MI_WINDOW(mi), *bp->glx_context); - - glShadeModel(GL_SMOOTH); - - glEnable(GL_DEPTH_TEST); - glEnable(GL_NORMALIZE); - glEnable(GL_CULL_FACE); - - glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); - - glPushMatrix (); - - glScalef(1.1, 1.1, 1.1); - - { - double x, y, z; - get_position (bp->rot, &x, &y, &z, !bp->button_down_p); - glTranslatef ((x - 0.5) * 4, - (y - 0.5) * 4, - (z - 0.5) * 7); - - gltrackball_rotate (bp->trackball); - - get_rotation (bp->rot, &x, &y, &z, !bp->button_down_p); - - /* add a little rotation for -no-spin mode */ - x -= 0.14; - y -= 0.06; - - 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); - } - - mi->polygon_count = 0; - - glScalef (1.5, 1.5, 1.5); - -/*#define DEBUG*/ - -#ifdef DEBUG - glScalef (.5, .5, .5); - glTranslatef (0, -bp->gears[0].g.r * bp->ngears, 0); -#endif - - for (i = 0; i < bp->ngears; i++) - { - mogear *mg = &bp->gears[i]; - gear *g = &mg->g; - - glPushMatrix(); -#ifndef DEBUG - glRotatef (mg->pos_th * 180 / M_PI, 0, 0, 1); /* rotation on ring */ - glTranslatef (bp->ring_r, 0, 0); /* position on ring */ - glRotatef (mg->pos_thz * 180 / M_PI, 0, 1, 0); /* twist a bit */ - - if (do_roll) - { - glRotatef (bp->roll_th * 180 / M_PI, 0, 1, 0); - bp->roll_th += speed * 0.0005; - } -#else - glTranslatef (0, i * 2 * g->r, 0); -#endif - glRotatef (g->th * 180 / M_PI, 0, 0, 1); - - glCallList (g->dlist); - mi->polygon_count += g->polygons; - glPopMatrix (); - } - - glPopMatrix (); - -#ifndef DEBUG - /* spin gears */ - for (i = 0; i < bp->ngears; i++) - { - mogear *mg = &bp->gears[i]; - mg->g.th += speed * (M_PI / 100) * (i & 1 ? 1 : -1); - } -#endif - - if (mi->fps_p) do_fps (mi); - glFinish(); - - glXSwapBuffers(dpy, window); -} - - -ENTRYPOINT void -free_mgears (ModeInfo *mi) -{ - mgears_configuration *bp = &bps[MI_SCREEN(mi)]; - if (!bp->glx_context) return; - glXMakeCurrent(MI_DISPLAY(mi), MI_WINDOW(mi), *bp->glx_context); - if (bp->gears) free (bp->gears); - if (bp->rot) free_rotator (bp->rot); - if (bp->trackball) gltrackball_free (bp->trackball); -} - -XSCREENSAVER_MODULE_2 ("MoebiusGears", moebiusgears, mgears) - -#endif /* USE_GL */ |