From d3a98cf6cbc3bd0b9efc570f58e8812c03931c18 Mon Sep 17 00:00:00 2001 From: Simon Rettberg Date: Tue, 16 Oct 2018 10:08:48 +0200 Subject: Original 5.40 --- hacks/glx/cubicgrid.c | 269 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 269 insertions(+) create mode 100644 hacks/glx/cubicgrid.c (limited to 'hacks/glx/cubicgrid.c') diff --git a/hacks/glx/cubicgrid.c b/hacks/glx/cubicgrid.c new file mode 100644 index 0000000..34b6c34 --- /dev/null +++ b/hacks/glx/cubicgrid.c @@ -0,0 +1,269 @@ +/*- + * Permission to use, copy, modify, and distribute this software and its + * documentation for any purpose and without fee is hereby granted, + * provided that the above copyright notice appear in all copies and that + * both that copyright notice and this permission notice appear in + * supporting documentation. + * + * This file is provided AS IS with no warranties of any kind. The author + * shall have no liability with respect to the infringement of copyrights, + * trade secrets or any patents by this file or any part thereof. In no + * event will the author be liable for any lost revenue or profits or + * other special, indirect and consequential damages. + * + * Cubic Grid - a 3D lattice. The observer is located in the centre of + * a spinning finite lattice. As it rotates, various view-throughs appear and + * evolve. A simple idea with interesting results. + * + * Vasek Potocek (Dec-28-2007) + * vasek.potocek@post.cz + */ + +#define DEFAULTS "*delay: 20000 \n" \ + "*showFPS: False \n" \ + "*wireframe: False \n" \ + "*suppressRotationAnimation: True\n" \ + +# define free_cubicgrid 0 +# define release_cubicgrid 0 +#include "xlockmore.h" + +#ifdef USE_GL + +#define DEF_SPEED "1.0" +#define DEF_DIV "30" +#define DEF_ZOOM "20" +#define DEF_BIGDOTS "True" + +#undef countof +#define countof(x) (sizeof((x))/sizeof((*x))) + +#include "rotator.h" +#include "gltrackball.h" + +/*************************************************************************/ + +static int ticks; +static float size; +static float speed; +static Bool bigdots; + +static argtype vars[] = { + { &speed, "speed", "Speed", DEF_SPEED, t_Float }, + { &size, "zoom", "Zoom", DEF_ZOOM, t_Float }, + { &ticks, "ticks", "Ticks", DEF_DIV, t_Int }, + { &bigdots, "bigdots", "BigDots", DEF_BIGDOTS, t_Bool }, +}; + +static XrmOptionDescRec opts[] = { + { "-speed", ".speed", XrmoptionSepArg, 0 }, + { "-zoom", ".zoom", XrmoptionSepArg, 0 }, + { "-ticks", ".ticks", XrmoptionSepArg, 0 }, + { "-bigdots", ".bigdots", XrmoptionNoArg, "True" }, + { "+bigdots", ".bigdots", XrmoptionNoArg, "False" }, +}; + +ENTRYPOINT ModeSpecOpt cubicgrid_opts = {countof(opts), opts, countof(vars), vars, NULL}; + +#ifdef USE_MODULES +ModStruct cubicgrid_description = +{ "cubicgrid", "init_cubicgrid", "draw_cubicgrid", NULL, + "draw_cubicgrid", "change_cubicgrid", NULL, &cubicgrid_opts, + 25000, 1, 1, 1, 1.0, 4, "", + "Shows a rotating 3D lattice from inside", 0, NULL +}; +#endif + +typedef struct { + GLXContext *glx_context; + GLfloat ratio; + GLint list; + + rotator *rot; + trackball_state *trackball; + Bool button_down_p; + int npoints; +} cubicgrid_conf; + +static cubicgrid_conf *cubicgrid = NULL; + +static const GLfloat zpos = -18.0; + +/*************************************************************************/ + +ENTRYPOINT Bool +cubicgrid_handle_event (ModeInfo *mi, XEvent *event) +{ + cubicgrid_conf *cp = &cubicgrid[MI_SCREEN(mi)]; + + if (gltrackball_event_handler (event, cp->trackball, + MI_WIDTH (mi), MI_HEIGHT (mi), + &cp->button_down_p)) + return True; + + return False; +} + + +static Bool draw_main(ModeInfo *mi) +{ + cubicgrid_conf *cp = &cubicgrid[MI_SCREEN(mi)]; + double x, y, z; + + glClear(GL_COLOR_BUFFER_BIT); + glLoadIdentity(); + + glRotatef (180, 1, 0, 0); /* Make trackball track the right way */ + glRotatef (180, 0, 1, 0); + + glTranslatef(0, 0, zpos); + + glScalef(size/ticks, size/ticks, size/ticks); + + +# ifdef HAVE_MOBILE /* Keep it the same relative size when rotated. */ + { + GLfloat h = MI_HEIGHT(mi) / (GLfloat) MI_WIDTH(mi); + int o = (int) current_device_rotation(); + if (o != 0 && o != 180 && o != -180) + glScalef (1/h, 1/h, 1); + } +# endif + + gltrackball_rotate (cp->trackball); + + get_rotation (cp->rot, &x, &y, &z, !cp->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); + + glTranslatef(-ticks/2.0, -ticks/2.0, -ticks/2.0); + glCallList(cp->list); + return True; +} + +static void init_gl(ModeInfo *mi) +{ + cubicgrid_conf *cp = &cubicgrid[MI_SCREEN(mi)]; + int x, y, z; + float tf = ticks; + + glDrawBuffer(GL_BACK); + if(bigdots) { + glPointSize(2.0); + } + glPixelStorei(GL_UNPACK_ALIGNMENT, 1); + glShadeModel(GL_FLAT); + + cp->list = glGenLists(1); + glNewList(cp->list, GL_COMPILE); + if(MI_IS_MONO(mi)) { + glColor3f(1.0, 1.0, 1.0); + glBegin(GL_POINTS); + for(x = 0; x < ticks; x++) { + for(y = 0; y < ticks; y++) { + for(z = 0; z < ticks; z++) { + glVertex3f(x, y, z); + cp->npoints++; + } + } + } + glEnd(); + } + else + { + glBegin(GL_POINTS); + for(x = 0; x < ticks; x++) { + for(y = 0; y < ticks; y++) { + for(z = 0; z < ticks; z++) { + glColor3f(x/tf, y/tf, z/tf); + glVertex3f(x, y, z); + cp->npoints++; + } + } + } + glEnd(); + } + glEndList(); +} + +/*************************************************************************/ + +ENTRYPOINT void reshape_cubicgrid(ModeInfo *mi, int width, int height) +{ + cubicgrid_conf *cp = &cubicgrid[MI_SCREEN(mi)]; + int y = 0; + if(!height) height = 1; + cp->ratio = (GLfloat)width/(GLfloat)height; + + if (width > height * 3) { /* tiny window: show middle */ + height = width; + y = -height/2; + cp->ratio = (GLfloat)width/(GLfloat)height; + } + + glViewport(0, y, (GLint) width, (GLint) height); + glMatrixMode(GL_PROJECTION); + glLoadIdentity(); + gluPerspective(30.0, cp->ratio, 1.0, 100.0); + glMatrixMode(GL_MODELVIEW); + glClear(GL_COLOR_BUFFER_BIT); +} + +ENTRYPOINT void init_cubicgrid(ModeInfo *mi) +{ + cubicgrid_conf *cp; + MI_INIT(mi, cubicgrid); + cp = &cubicgrid[MI_SCREEN(mi)]; + + if ((cp->glx_context = init_GL(mi)) != NULL) { + init_gl(mi); + reshape_cubicgrid(mi, MI_WIDTH(mi), MI_HEIGHT(mi)); + } else { + MI_CLEARWINDOW(mi); + } + + { + double spin_speed = 0.045 * speed; + double spin_accel = 0.005 * speed; + + cp->rot = make_rotator (spin_speed, spin_speed, spin_speed, + spin_accel, 0, True); + cp->trackball = gltrackball_init (True); + } +} + +ENTRYPOINT void draw_cubicgrid(ModeInfo * mi) +{ + Display *display = MI_DISPLAY(mi); + Window window = MI_WINDOW(mi); + cubicgrid_conf *cp; + if (!cubicgrid) return; + cp = &cubicgrid[MI_SCREEN(mi)]; + MI_IS_DRAWN(mi) = True; + if (!cp->glx_context) return; + glXMakeCurrent(display, window, *(cp->glx_context)); + if (!draw_main(mi)) { + MI_ABORT(mi); + return; + } + mi->polygon_count = cp->npoints; + if (MI_IS_FPS(mi)) do_fps (mi); + glFlush(); + glXSwapBuffers(display, window); +} + +#ifndef STANDALONE +ENTRYPOINT void change_cubicgrid(ModeInfo * mi) +{ + cubicgrid_conf *cp = &cubicgrid[MI_SCREEN(mi)]; + if (!cp->glx_context) return; + glXMakeCurrent(MI_DISPLAY(mi), MI_WINDOW(mi), *(cp->glx_context)); + init_gl(mi); +} +#endif /* !STANDALONE */ + + +XSCREENSAVER_MODULE ("CubicGrid", cubicgrid) + +#endif -- cgit v1.2.3-55-g7522