/* -*- Mode: C; tab-width: 4 -*- */ /* crystal --- polygons moving according to plane group rules */ #if 0 static const char sccsid[] = "@(#)crystal.c 4.12 98/09/10 xlockmore"; #endif /*- * Copyright (c) 1997 by Jouk Jansen * * 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. * * The author should like to be notified if changes have been made to the * routine. Response will only be guaranteed when a VMS version of the * program is available. * * A moving polygon-mode. The polygons obey 2D-planegroup symmetry. * * The groupings of the cells fall in 3 categories: * oblique groups 1 and 2 where the angle gamma ranges from 60 to 120 degrees * square groups 3 through 11 where the angle gamma is 90 degrees * hexagonal groups 12 through 17 where the angle gamma is 120 degrees * * Revision History: * 03-Dec-98: Random inversion of y-axis included to simulate hexagonal groups * with an angle of 60 degrees. * 10-Sep-98: new colour scheme * 24-Feb-98: added option centre which turns on/off forcing the centre of * the screen to be used * added option maxsize which forces the dimensions to be chasen * in such ua way that the largest possible part of the screen is * used * When only one unit cell is drawn, it is chosen at random * 18-Feb-98: added support for negative numbers with -nx and -ny meaning * "random" choice with given maximum * added +/-grid option. If -cell is specified this option * determines if one or all unit cells are drawn. * -batchcount is now a parameter for all the objects on the screen * instead of the number of "unique" objects * The maximum size of the objects now scales with the part * of the screen used. * fixed "size" problem. Now very small non-vissable objects * are not allowed * 13-Feb-98: randomized the unit cell size * runtime options -/+cell (turn on/off unit cell drawing) * -nx num (number of translational symmetries in x-direction * -ny num (idem y-direction but ignored for square and * hexagonal space groups * i.e. try xlock -mode crystal -nx 3 -ny 2 * Fullrandom overrules the -/+cell option. * 05-Feb-98: Revision + bug repairs * shows unit cell * use part of the screen for unit cell * in hexagonal and square groups a&b axis forced to be equal * cell angle for oblique groups randomly chosen between 60 and 120 * bugs solved: planegroups with cell angles <> 90.0 now work properly * 19-Sep-97: Added remaining hexagonal groups * 12-Jun-97: Created */ #ifdef STANDALONE # define DEFAULTS "*delay: 60000 \n" \ "*count: -500 \n" \ "*cycles: 200 \n" \ "*size: -15 \n" \ "*ncolors: 100 \n" \ "*fpsSolid: True \n" \ "*ignoreRotation: True \n" \ # define release_crystal 0 # define reshape_crystal 0 # define crystal_handle_event 0 # include "xlockmore.h" /* in xscreensaver distribution */ #else /* STANDALONE */ # include "xlock.h" /* in xlockmore distribution */ # include "color.h" #endif /* STANDALONE */ #define DEF_CELL "True" /* Draw unit cell */ #define DEF_GRID "False" /* Draw unit all cell if DEF_CELL is True */ #define DEF_NX "-3" /* number of unit cells in x-direction */ #define DEF_NX1 1 /* number of unit cells in x-direction */ #define DEF_NY "-3" /* number of unit cells in y-direction */ #define DEF_NY1 1 /* number of unit cells in y-direction */ #define DEF_CENTRE "False" #define DEF_MAXSIZE "False" #define DEF_CYCLE "True" #undef NRAND #define NRAND(n) ( (n) ? (int) (LRAND() % (n)) : 0) #define min(a,b) ((a) <= (b) ? (a) : (b)) static int nx, ny; static Bool unit_cell, grid_cell, centre, maxsize, cycle_p; static XrmOptionDescRec opts[] = { {"-nx", "crystal.nx", XrmoptionSepArg, 0}, {"-ny", "crystal.ny", XrmoptionSepArg, 0}, {"-centre", ".crystal.centre", XrmoptionNoArg, "on"}, {"+centre", ".crystal.centre", XrmoptionNoArg, "off"}, {"-maxsize", ".crystal.maxsize", XrmoptionNoArg, "on"}, {"+maxsize", ".crystal.maxsize", XrmoptionNoArg, "off"}, {"-cell", ".crystal.cell", XrmoptionNoArg, "on"}, {"+cell", ".crystal.cell", XrmoptionNoArg, "off"}, {"-grid", ".crystal.grid", XrmoptionNoArg, "on"}, {"+grid", ".crystal.grid", XrmoptionNoArg, "off"}, {"-shift", ".crystal.shift", XrmoptionNoArg, "on"}, {"+shift", ".crystal.shift", XrmoptionNoArg, "off"} }; static argtype vars[] = { {&nx, "nx", "nx", DEF_NX, t_Int}, {&ny, "ny", "ny", DEF_NY, t_Int}, {¢re, "centre", "Centre", DEF_CENTRE, t_Bool}, {&maxsize, "maxsize", "Maxsize", DEF_MAXSIZE, t_Bool}, {&unit_cell, "cell", "Cell", DEF_CELL, t_Bool}, {&grid_cell, "grid", "Grid", DEF_GRID, t_Bool}, {&cycle_p, "shift", "Shift", DEF_CYCLE, t_Bool} }; static OptionStruct desc[] = { {"-nx num", "Number of unit cells in x-direction"}, {"-ny num", "Number of unit cells in y-direction"}, {"-/+centre", "turn on/off centering on screen"}, {"-/+maxsize", "turn on/off use of maximum part of screen"}, {"-/+cell", "turn on/off drawing of unit cell"}, {"-/+grid", "turn on/off drawing of grid of unit cells (if -cell is on)"}, {"-/+shift", "turn on/off colour cycling"} }; ENTRYPOINT ModeSpecOpt crystal_opts = {sizeof opts / sizeof opts[0], opts, sizeof vars / sizeof vars[0], vars, desc}; #ifdef USE_MODULES ModStruct crystal_description = {"crystal", "init_crystal", "draw_crystal", NULL, "refresh_crystal", "init_crystal", "free_crystal", &crystal_opts, 60000, -40, 200, -15, 64, 1.0, "", "Shows polygons in 2D plane groups", 0, NULL}; #endif #define DEF_NUM_ATOM 10 #define DEF_SIZ_ATOM 10 #define PI_RAD (M_PI / 180.0) static Bool centro[17] = { False, True, False, False, False, True, True, True, True, True, True, True, False, False, False, True, True }; static Bool primitive[17] = { True, True, True, True, False, True, True, True, False, True, True, True, True, True, True, True, True }; static short numops[34] = { 1, 0, 1, 0, 9, 7, 2, 0, 9, 7, 9, 7, 4, 2, 5, 3, 9, 7, 8, 6, 10, 6, 8, 4, 16, 13, 19, 13, 16, 10, 19, 13, 19, 13 }; static short operation[114] = { 1, 0, 0, 1, 0, 0, -1, 0, 0, 1, 0, 1, -1, 0, 0, 1, 1, 0, 1, 0, 0, 1, 0, 0, -1, 0, 0, 1, 1, 1, 1, 0, 0, 1, 1, 1, 0, -1, 1, 0, 0, 0, 1, 0, 0, 1, 0, 0, -1, 0, 0, 1, 0, 0, 0, 1, 1, 0, 0, 0, -1, 0, -1, 1, 0, 0, 1, -1, 0, -1, 0, 0, 0, 1, 1, 0, 0, 0, 0, -1, 1, -1, 0, 0, -1, 1, -1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, -1, -1, 0, 0, 0, -1, 1, 0, 1, 0, 0, 1, 0, 1, -1, 0, 0 }; typedef struct { unsigned long colour; int x0, y0, velocity[2]; float angle, velocity_a; int num_point, at_type, size_at; XPoint xy[5]; } crystalatom; typedef struct { Bool painted; int win_width, win_height, num_atom; int planegroup, a, b, offset_w, offset_h, nx, ny; float gamma; crystalatom *atom; GC gc; Bool unit_cell, grid_cell; Colormap cmap; XColor *colors; int ncolors; Bool cycle_p, mono_p, no_colors; unsigned long blackpixel, whitepixel, fg, bg; int direction, invert; unsigned long grid_pixel; int inx, iny; } crystalstruct; static crystalstruct *crystals = NULL; static void trans_coor(XPoint * xyp, XPoint * new_xyp, int num_points, float gamma) { int i; for (i = 0; i <= num_points; i++) { new_xyp[i].x = xyp[i].x + (int) (xyp[i].y * sin((gamma - 90.0) * PI_RAD)); new_xyp[i].y = (int) (xyp[i].y / cos((gamma - 90.0) * PI_RAD)); } } static void trans_coor_back(XPoint * xyp, XPoint * new_xyp, int num_points, float gamma, int offset_w, int offset_h , int winheight , int invert ) { int i; for (i = 0; i <= num_points; i++) { new_xyp[i].y = (int) (xyp[i].y * cos((gamma - 90) * PI_RAD)) + offset_h; new_xyp[i].x = xyp[i].x - (int) (xyp[i].y * sin((gamma - 90.0) * PI_RAD)) + offset_w; if ( invert ) new_xyp[i].y = winheight - new_xyp[i].y; } } static void crystal_setupatom(crystalatom * atom0, float gamma) { XPoint xy[5]; int x0, y0; y0 = (int) (atom0->y0 * cos((gamma - 90) * PI_RAD)); x0 = atom0->x0 - (int) (atom0->y0 * sin((gamma - 90.0) * PI_RAD)); switch (atom0->at_type) { case 0: /* rectangles */ xy[0].x = x0 + (int) (2 * atom0->size_at * cos(atom0->angle)) + (int) (atom0->size_at * sin(atom0->angle)); xy[0].y = y0 + (int) (atom0->size_at * cos(atom0->angle)) - (int) (2 * atom0->size_at * sin(atom0->angle)); xy[1].x = x0 + (int) (2 * atom0->size_at * cos(atom0->angle)) - (int) (atom0->size_at * sin(atom0->angle)); xy[1].y = y0 - (int) (atom0->size_at * cos(atom0->angle)) - (int) (2 * atom0->size_at * sin(atom0->angle)); xy[2].x = x0 - (int) (2 * atom0->size_at * cos(atom0->angle)) - (int) (atom0->size_at * sin(atom0->angle)); xy[2].y = y0 - (int) (atom0->size_at * cos(atom0->angle)) + (int) (2 * atom0->size_at * sin(atom0->angle)); xy[3].x = x0 - (int) (2 * atom0->size_at * cos(atom0->angle)) + (int) (atom0->size_at * sin(atom0->angle)); xy[3].y = y0 + (int) (atom0->size_at * cos(atom0->angle)) + (int) (2 * atom0->size_at * sin(atom0->angle)); xy[4].x = xy[0].x; xy[4].y = xy[0].y; trans_coor(xy, atom0->xy, 4, gamma); return; case 1: /* squares */ xy[0].x = x0 + (int) (1.5 * atom0->size_at * cos(atom0->angle)) + (int) (1.5 * atom0->size_at * sin(atom0->angle)); xy[0].y = y0 + (int) (1.5 * atom0->size_at * cos(atom0->angle)) - (int) (1.5 * atom0->size_at * sin(atom0->angle)); xy[1].x = x0 + (int) (1.5 * atom0->size_at * cos(atom0->angle)) - (int) (1.5 * atom0->size_at * sin(atom0->angle)); xy[1].y = y0 - (int) (1.5 * atom0->size_at * cos(atom0->angle)) - (int) (1.5 * atom0->size_at * sin(atom0->angle)); xy[2].x = x0 - (int) (1.5 * atom0->size_at * cos(atom0->angle)) - (int) (1.5 * atom0->size_at * sin(atom0->angle)); xy[2].y = y0 - (int) (1.5 * atom0->size_at * cos(atom0->angle)) + (int) (1.5 * atom0->size_at * sin(atom0->angle)); xy[3].x = x0 - (int) (1.5 * atom0->size_at * cos(atom0->angle)) + (int) (1.5 * atom0->size_at * sin(atom0->angle)); xy[3].y = y0 + (int) (1.5 * atom0->size_at * cos(atom0->angle)) + (int) (1.5 * atom0->size_at * sin(atom0->angle)); xy[4].x = xy[0].x; xy[4].y = xy[0].y; trans_coor(xy, atom0->xy, 4, gamma); return; case 2: /* triangles */ xy[0].x = x0 + (int) (1.5 * atom0->size_at * sin(atom0->angle)); xy[0].y = y0 + (int) (1.5 * atom0->size_at * cos(atom0->angle)); xy[1].x = x0 + (int) (1.5 * atom0->size_at * cos(atom0->angle)) - (int) (1.5 * atom0->size_at * sin(atom0->angle)); xy[1].y = y0 - (int) (1.5 * atom0->size_at * cos(atom0->angle)) - (int) (1.5 * atom0->size_at * sin(atom0->angle)); xy[2].x = x0 - (int) (1.5 * atom0->size_at * cos(atom0->angle)) - (int) (1.5 * atom0->size_at * sin(atom0->angle)); xy[2].y = y0 - (int) (1.5 * atom0->size_at * cos(atom0->angle)) + (int) (1.5 * atom0->size_at * sin(atom0->angle)); xy[3].x = xy[0].x; xy[3].y = xy[0].y; trans_coor(xy, atom0->xy, 3, gamma); return; } } static void crystal_drawatom(ModeInfo * mi, crystalatom * atom0) { crystalstruct *cryst; Display *display = MI_DISPLAY(mi); Window window = MI_WINDOW(mi); int j, k, l, m; cryst = &crystals[MI_SCREEN(mi)]; for (j = numops[2 * cryst->planegroup + 1]; j < numops[2 * cryst->planegroup]; j++) { XPoint xy[5], new_xy[5]; XPoint xy_1[5]; int xtrans, ytrans; xtrans = operation[j * 6] * atom0->x0 + operation[j * 6 + 1] * atom0->y0 + (int) (operation[j * 6 + 4] * cryst->a / 2.0); ytrans = operation[j * 6 + 2] * atom0->x0 + operation[j * 6 + 3] * atom0->y0 + (int) (operation[j * 6 + 5] * cryst->b / 2.0); if (xtrans < 0) { if (xtrans < -cryst->a) xtrans = 2 * cryst->a; else xtrans = cryst->a; } else if (xtrans >= cryst->a) xtrans = -cryst->a; else xtrans = 0; if (ytrans < 0) ytrans = cryst->b; else if (ytrans >= cryst->b) ytrans = -cryst->b; else ytrans = 0; for (k = 0; k < atom0->num_point; k++) { xy[k].x = operation[j * 6] * atom0->xy[k].x + operation[j * 6 + 1] * atom0->xy[k].y + (int) (operation[j * 6 + 4] * cryst->a / 2.0) + xtrans; xy[k].y = operation[j * 6 + 2] * atom0->xy[k].x + operation[j * 6 + 3] * atom0->xy[k].y + (int) (operation[j * 6 + 5] * cryst->b / 2.0) + ytrans; } xy[atom0->num_point].x = xy[0].x; xy[atom0->num_point].y = xy[0].y; for (l = 0; l < cryst->nx; l++) { for (m = 0; m < cryst->ny; m++) { for (k = 0; k <= atom0->num_point; k++) { xy_1[k].x = xy[k].x + l * cryst->a; xy_1[k].y = xy[k].y + m * cryst->b; } trans_coor_back(xy_1, new_xy, atom0->num_point, cryst->gamma, cryst->offset_w, cryst->offset_h , cryst->win_height, cryst->invert); XFillPolygon(display, window, cryst->gc, new_xy, atom0->num_point, Convex, CoordModeOrigin); } } if (centro[cryst->planegroup] == True) { for (k = 0; k <= atom0->num_point; k++) { xy[k].x = cryst->a - xy[k].x; xy[k].y = cryst->b - xy[k].y; } for (l = 0; l < cryst->nx; l++) { for (m = 0; m < cryst->ny; m++) { for (k = 0; k <= atom0->num_point; k++) { xy_1[k].x = xy[k].x + l * cryst->a; xy_1[k].y = xy[k].y + m * cryst->b; } trans_coor_back(xy_1, new_xy, atom0->num_point, cryst->gamma, cryst->offset_w, cryst->offset_h , cryst->win_height , cryst->invert); XFillPolygon(display, window, cryst->gc, new_xy, atom0->num_point, Convex, CoordModeOrigin); } } } if (primitive[cryst->planegroup] == False) { if (xy[atom0->num_point].x >= (int) (cryst->a / 2.0)) xtrans = (int) (-cryst->a / 2.0); else xtrans = (int) (cryst->a / 2.0); if (xy[atom0->num_point].y >= (int) (cryst->b / 2.0)) ytrans = (int) (-cryst->b / 2.0); else ytrans = (int) (cryst->b / 2.0); for (k = 0; k <= atom0->num_point; k++) { xy[k].x = xy[k].x + xtrans; xy[k].y = xy[k].y + ytrans; } for (l = 0; l < cryst->nx; l++) { for (m = 0; m < cryst->ny; m++) { for (k = 0; k <= atom0->num_point; k++) { xy_1[k].x = xy[k].x + l * cryst->a; xy_1[k].y = xy[k].y + m * cryst->b; } trans_coor_back(xy_1, new_xy, atom0->num_point, cryst->gamma, cryst->offset_w, cryst->offset_h , cryst->win_height, cryst->invert); XFillPolygon(display, window, cryst->gc, new_xy, atom0->num_point, Convex, CoordModeOrigin); } } if (centro[cryst->planegroup] == True) { XPoint xy1[5]; for (k = 0; k <= atom0->num_point; k++) { xy1[k].x = cryst->a - xy[k].x; xy1[k].y = cryst->b - xy[k].y; } for (l = 0; l < cryst->nx; l++) { for (m = 0; m < cryst->ny; m++) { for (k = 0; k <= atom0->num_point; k++) { xy_1[k].x = xy1[k].x + l * cryst->a; xy_1[k].y = xy1[k].y + m * cryst->b; } trans_coor_back(xy_1, new_xy, atom0->num_point, cryst->gamma, cryst->offset_w, cryst->offset_h , cryst->win_height, cryst->invert); XFillPolygon(display, window, cryst->gc, new_xy, atom0->num_point, Convex, CoordModeOrigin); } } } } } } ENTRYPOINT void init_crystal(ModeInfo * mi); ENTRYPOINT void draw_crystal(ModeInfo * mi) { Display *display = MI_DISPLAY(mi); Window window = MI_WINDOW(mi); crystalstruct *cryst = &crystals[MI_SCREEN(mi)]; int i; #ifdef HAVE_JWXYZ /* Don't second-guess Quartz's double-buffering */ XClearWindow(MI_DISPLAY(mi), MI_WINDOW(mi)); #endif if (cryst->no_colors) { init_crystal(mi); return; } /* Moved from init_crystal because you can't draw after MI_CLEARWINDOW in XScreenSaver. - Dave Odell */ if (cryst->unit_cell #ifndef HAVE_JWXYZ && !cryst->painted #endif ) { int y_coor1 , y_coor2; XSetForeground(display, cryst->gc, cryst->grid_pixel); if (cryst->grid_cell) { int inx, iny; if ( cryst->invert ) y_coor1 = y_coor2 = cryst->win_height - cryst->offset_h; else y_coor1 = y_coor2 = cryst->offset_h; XDrawLine(display, window, cryst->gc, cryst->offset_w, y_coor1, cryst->offset_w + cryst->nx * cryst->a, y_coor2); if ( cryst->invert ) { y_coor1 = cryst->win_height - cryst->offset_h; y_coor2 = cryst->win_height - (int) (cryst->ny * cryst->b * cos((cryst->gamma - 90) * PI_RAD)) - cryst->offset_h; } else { y_coor1 = cryst->offset_h; y_coor2 = (int) (cryst->ny * cryst->b * cos((cryst->gamma - 90) * PI_RAD)) + cryst->offset_h; } XDrawLine(display, window, cryst->gc, cryst->offset_w, y_coor1, (int) (cryst->offset_w - cryst->ny * cryst->b * sin((cryst->gamma - 90) * PI_RAD)), y_coor2); inx = cryst->nx; for (iny = 1; iny <= cryst->ny; iny++) { if ( cryst->invert ) { y_coor1 = cryst->win_height - (int) (iny * cryst->b * cos((cryst->gamma - 90) * PI_RAD)) - cryst->offset_h; y_coor2 = cryst->win_height - (int) (iny * cryst->b * cos((cryst->gamma - 90) * PI_RAD)) - cryst->offset_h; } else { y_coor1 = (int) (iny * cryst->b * cos((cryst->gamma - 90) * PI_RAD)) + cryst->offset_h; y_coor2 = (int) (iny * cryst->b * cos((cryst->gamma - 90) * PI_RAD)) + cryst->offset_h; } XDrawLine(display, window, cryst->gc, (int) (cryst->offset_w + inx * cryst->a - (int) (iny * cryst->b * sin((cryst->gamma - 90) * PI_RAD))), y_coor1, (int) (cryst->offset_w - iny * cryst->b * sin((cryst->gamma - 90) * PI_RAD)), y_coor2); } iny = cryst->ny; for (inx = 1; inx <= cryst->nx; inx++) { if ( cryst->invert ) { y_coor1 =cryst->win_height - (int) (iny * cryst->b * cos((cryst->gamma - 90) * PI_RAD)) - cryst->offset_h; y_coor2 =cryst->win_height - cryst->offset_h; } else { y_coor1 =(int) (iny * cryst->b * cos((cryst->gamma - 90) * PI_RAD)) + cryst->offset_h; y_coor2 =cryst->offset_h; } XDrawLine(display, window, cryst->gc, (int) (cryst->offset_w + inx * cryst->a - (int) (iny * cryst->b * sin((cryst->gamma - 90) * PI_RAD))), y_coor1, cryst->offset_w + inx * cryst->a, y_coor2); } } else { if ( cryst->invert ) { y_coor1 =cryst->win_height - (int) (cryst->iny * cryst->b * cos((cryst->gamma - 90) * PI_RAD)) - cryst->offset_h; y_coor2 =cryst->win_height - (int) ( ( cryst->iny + 1 ) * cryst->b * cos((cryst->gamma - 90) * PI_RAD)) - cryst->offset_h; } else { y_coor1 =(int) (cryst->iny * cryst->b * cos((cryst->gamma - 90) * PI_RAD)) + cryst->offset_h; y_coor2 =(int) (( cryst->iny + 1 ) * cryst->b * cos((cryst->gamma - 90) * PI_RAD)) + cryst->offset_h; } XDrawLine(display, window, cryst->gc, cryst->offset_w + cryst->inx * cryst->a - (int) (cryst->iny * cryst->b * sin((cryst->gamma - 90) * PI_RAD)), y_coor1, cryst->offset_w + (cryst->inx + 1) * cryst->a - (int) (cryst->iny * cryst->b * sin((cryst->gamma - 90) * PI_RAD)), y_coor1); XDrawLine(display, window, cryst->gc, cryst->offset_w + cryst->inx * cryst->a - (int) (cryst->iny * cryst->b * sin((cryst->gamma - 90) * PI_RAD)), y_coor1, cryst->offset_w + cryst->inx * cryst->a - (int) ((cryst->iny + 1) * cryst->b * sin((cryst->gamma - 90) * PI_RAD)), y_coor2); XDrawLine(display, window, cryst->gc, cryst->offset_w + (cryst->inx + 1) * cryst->a - (int) (cryst->iny * cryst->b * sin((cryst->gamma - 90) * PI_RAD)), y_coor1, cryst->offset_w + (cryst->inx + 1) * cryst->a - (int) ((cryst->iny + 1) * cryst->b * sin((cryst->gamma - 90) * PI_RAD)), y_coor2); XDrawLine(display, window, cryst->gc, cryst->offset_w + cryst->inx * cryst->a - (int) ((cryst->iny + 1) * cryst->b * sin((cryst->gamma - 90) * PI_RAD)), y_coor2, cryst->offset_w + (cryst->inx + 1) * cryst->a - (int) ((cryst->iny + 1) * cryst->b * sin((cryst->gamma - 90) * PI_RAD)), y_coor2); } } XSetFunction(display, cryst->gc, GXxor); /* Rotate colours */ if (cryst->cycle_p) { rotate_colors(mi->xgwa.screen, cryst->cmap, cryst->colors, cryst->ncolors, cryst->direction); if (!(LRAND() % 1000)) cryst->direction = -cryst->direction; } for (i = 0; i < cryst->num_atom; i++) { crystalatom *atom0; atom0 = &cryst->atom[i]; if (MI_IS_INSTALL(mi) && MI_NPIXELS(mi) > 2) { XSetForeground(display, cryst->gc, cryst->colors[atom0->colour].pixel); } else { XSetForeground(display, cryst->gc, atom0->colour); } #ifndef HAVE_JWXYZ if(cryst->painted) crystal_drawatom(mi, atom0); #endif atom0->velocity[0] += NRAND(3) - 1; atom0->velocity[0] = MAX(-20, MIN(20, atom0->velocity[0])); atom0->velocity[1] += NRAND(3) - 1; atom0->velocity[1] = MAX(-20, MIN(20, atom0->velocity[1])); atom0->x0 += atom0->velocity[0]; /*if (cryst->gamma == 90.0) { */ if (atom0->x0 < 0) atom0->x0 += cryst->a; else if (atom0->x0 >= cryst->a) atom0->x0 -= cryst->a; atom0->y0 += atom0->velocity[1]; if (atom0->y0 < 0) atom0->y0 += cryst->b; else if (atom0->y0 >= cryst->b) atom0->y0 -= cryst->b; /*} */ atom0->velocity_a += ((float) NRAND(1001) - 500.0) / 2000.0; atom0->angle += atom0->velocity_a; crystal_setupatom(atom0, cryst->gamma); crystal_drawatom(mi, atom0); } XSetFunction(display, cryst->gc, GXcopy); cryst->painted = True; MI_IS_DRAWN(mi) = True; } #ifndef STANDALONE ENTRYPOINT void refresh_crystal(ModeInfo * mi) { Display *display = MI_DISPLAY(mi); Window window = MI_WINDOW(mi); crystalstruct *cryst = &crystals[MI_SCREEN(mi)]; int i; if (!cryst->painted) return; MI_CLEARWINDOW(mi); XSetFunction(display, cryst->gc, GXxor); if (cryst->unit_cell) { int y_coor1 , y_coor2; if (MI_NPIXELS(mi) > 2) XSetForeground(display, cryst->gc, MI_PIXEL(mi, NRAND(MI_NPIXELS(mi)))); else XSetForeground(display, cryst->gc, MI_WHITE_PIXEL(mi)); if (cryst->grid_cell) { int inx, iny; if ( cryst->invert ) y_coor1 = y_coor2 = cryst->win_height - cryst->offset_h; else y_coor1 = y_coor2 = cryst->offset_h; XDrawLine(display, window, cryst->gc, cryst->offset_w, y_coor1, cryst->offset_w + cryst->nx * cryst->a, y_coor2); if ( cryst->invert ) { y_coor1 = cryst->win_height - cryst->offset_h; y_coor2 = cryst->win_height - (int) (cryst->ny * cryst->b * cos((cryst->gamma - 90) * PI_RAD)) - cryst->offset_h; } else { y_coor1 = cryst->offset_h; y_coor2 = (int) (cryst->ny * cryst->b * cos((cryst->gamma - 90) * PI_RAD)) + cryst->offset_h; } XDrawLine(display, window, cryst->gc, cryst->offset_w, y_coor1, (int) (cryst->offset_w - cryst->ny * cryst->b * sin((cryst->gamma - 90) * PI_RAD)), y_coor2); inx = cryst->nx; for (iny = 1; iny <= cryst->ny; iny++) { if ( cryst->invert ) { y_coor1 = cryst->win_height - (int) (iny * cryst->b * cos((cryst->gamma - 90) * PI_RAD)) - cryst->offset_h; y_coor2 = cryst->win_height - (int) (iny * cryst->b * cos((cryst->gamma - 90) * PI_RAD)) - cryst->offset_h; } else { y_coor1 = (int) (iny * cryst->b * cos((cryst->gamma - 90) * PI_RAD)) + cryst->offset_h; y_coor2 = (int) (iny * cryst->b * cos((cryst->gamma - 90) * PI_RAD)) + cryst->offset_h; } XDrawLine(display, window, cryst->gc, (int) (cryst->offset_w + inx * cryst->a - (int) (iny * cryst->b * sin((cryst->gamma - 90) * PI_RAD))), y_coor1, (int) (cryst->offset_w - iny * cryst->b * sin((cryst->gamma - 90) * PI_RAD)), y_coor2); } iny = cryst->ny; for (inx = 1; inx <= cryst->nx; inx++) { if ( cryst->invert ) { y_coor1 =cryst->win_height - (int) (iny * cryst->b * cos((cryst->gamma - 90) * PI_RAD)) - cryst->offset_h; y_coor2 =cryst->win_height - cryst->offset_h; } else { y_coor1 =(int) (iny * cryst->b * cos((cryst->gamma - 90) * PI_RAD)) + cryst->offset_h; y_coor2 =cryst->offset_h; } XDrawLine(display, window, cryst->gc, (int) (cryst->offset_w + inx * cryst->a - (int) (iny * cryst->b * sin((cryst->gamma - 90) * PI_RAD))), y_coor1, cryst->offset_w + inx * cryst->a, y_coor2); } } else { int inx, iny; inx = NRAND(cryst->nx); iny = NRAND(cryst->ny); if ( cryst->invert ) { y_coor1 =cryst->win_height - (int) (iny * cryst->b * cos((cryst->gamma - 90) * PI_RAD)) - cryst->offset_h; y_coor2 =cryst->win_height - (int) ( ( iny + 1 ) * cryst->b * cos((cryst->gamma - 90) * PI_RAD)) - cryst->offset_h; } else { y_coor1 =(int) (iny * cryst->b * cos((cryst->gamma - 90) * PI_RAD)) + cryst->offset_h; y_coor2 =(int) (( iny + 1 ) * cryst->b * cos((cryst->gamma - 90) * PI_RAD)) + cryst->offset_h; } XDrawLine(display, window, cryst->gc, cryst->offset_w + inx * cryst->a - (int) (iny * cryst->b * sin((cryst->gamma - 90) * PI_RAD)), y_coor1, cryst->offset_w + (inx + 1) * cryst->a - (int) (iny * cryst->b * sin((cryst->gamma - 90) * PI_RAD)), y_coor1); XDrawLine(display, window, cryst->gc, cryst->offset_w + inx * cryst->a - (int) (iny * cryst->b * sin((cryst->gamma - 90) * PI_RAD)), y_coor1, cryst->offset_w + inx * cryst->a - (int) ((iny + 1) * cryst->b * sin((cryst->gamma - 90) * PI_RAD)), y_coor2); XDrawLine(display, window, cryst->gc, cryst->offset_w + (inx + 1) * cryst->a - (int) (iny * cryst->b * sin((cryst->gamma - 90) * PI_RAD)), y_coor1, cryst->offset_w + (inx + 1) * cryst->a - (int) ((iny + 1) * cryst->b * sin((cryst->gamma - 90) * PI_RAD)), y_coor2); XDrawLine(display, window, cryst->gc, cryst->offset_w + inx * cryst->a - (int) ((iny + 1) * cryst->b * sin((cryst->gamma - 90) * PI_RAD)), y_coor2, cryst->offset_w + (inx + 1) * cryst->a - (int) ((iny + 1) * cryst->b * sin((cryst->gamma - 90) * PI_RAD)), y_coor2); } } for (i = 0; i < cryst->num_atom; i++) { crystalatom *atom0; atom0 = &cryst->atom[i]; if (MI_IS_INSTALL(mi) && MI_NPIXELS(mi) > 2) { XSetForeground(display, cryst->gc, cryst->colors[atom0->colour].pixel); } else { XSetForeground(display, cryst->gc, atom0->colour); } crystal_drawatom(mi, atom0); } XSetFunction(display, cryst->gc, GXcopy); } #endif ENTRYPOINT void free_crystal(ModeInfo * mi) { Display *display = MI_DISPLAY(mi); crystalstruct *cryst = &crystals[MI_SCREEN(mi)]; if (MI_IS_INSTALL(mi) && MI_NPIXELS(mi) > 2) { MI_WHITE_PIXEL(mi) = cryst->whitepixel; MI_BLACK_PIXEL(mi) = cryst->blackpixel; #ifndef STANDALONE MI_FG_PIXEL(mi) = cryst->fg; MI_BG_PIXEL(mi) = cryst->bg; #endif if (cryst->colors && cryst->ncolors && !cryst->no_colors) free_colors(mi->xgwa.screen, cryst->cmap, cryst->colors, cryst->ncolors); if (cryst->colors) (void) free((void *) cryst->colors); #if 0 /* #### wrong! -jwz */ XFreeColormap(display, cryst->cmap); #endif } if (cryst->gc != NULL) XFreeGC(display, cryst->gc); if (cryst->atom != NULL) (void) free((void *) cryst->atom); } ENTRYPOINT void init_crystal(ModeInfo * mi) { Display *display = MI_DISPLAY(mi); crystalstruct *cryst; int i, max_atoms, size_atom, neqv; int cell_min; #define MIN_CELL 200 /* initialize */ MI_INIT (mi, crystals); cryst = &crystals[MI_SCREEN(mi)]; if (!cryst->gc) { if (MI_IS_INSTALL(mi) && MI_NPIXELS(mi) > 2) { XColor color; #ifndef STANDALONE extern char *background; extern char *foreground; cryst->fg = MI_FG_PIXEL(mi); cryst->bg = MI_BG_PIXEL(mi); #endif cryst->blackpixel = MI_BLACK_PIXEL(mi); cryst->whitepixel = MI_WHITE_PIXEL(mi); #if 0 /* #### wrong! -jwz */ cryst->cmap = XCreateColormap(display, window, MI_VISUAL(mi), AllocNone); XSetWindowColormap(display, window, cryst->cmap); #else cryst->cmap = mi->xgwa.colormap; #endif (void) XParseColor(display, cryst->cmap, "black", &color); (void) XAllocColor(display, cryst->cmap, &color); MI_BLACK_PIXEL(mi) = color.pixel; (void) XParseColor(display, cryst->cmap, "white", &color); (void) XAllocColor(display, cryst->cmap, &color); MI_WHITE_PIXEL(mi) = color.pixel; #ifndef STANDALONE (void) XParseColor(display, cryst->cmap, background, &color); (void) XAllocColor(display, cryst->cmap, &color); MI_BG_PIXEL(mi) = color.pixel; (void) XParseColor(display, cryst->cmap, foreground, &color); (void) XAllocColor(display, cryst->cmap, &color); MI_FG_PIXEL(mi) = color.pixel; #endif cryst->colors = 0; cryst->ncolors = 0; } if ((cryst->gc = XCreateGC(display, MI_WINDOW(mi), (unsigned long) 0, (XGCValues *) NULL)) == None) return; } /* Clear Display */ MI_CLEARWINDOW(mi); cryst->painted = False; XSetFunction(display, cryst->gc, GXxor); /*Set up crystal data */ cryst->direction = (LRAND() & 1) ? 1 : -1; if (MI_IS_FULLRANDOM(mi)) { if (LRAND() & 1) cryst->unit_cell = True; else cryst->unit_cell = False; } else cryst->unit_cell = unit_cell; if (cryst->unit_cell) { if (MI_IS_FULLRANDOM(mi)) { if (LRAND() & 1) cryst->grid_cell = True; else cryst->grid_cell = False; } else cryst->grid_cell = grid_cell; } cryst->win_width = MI_WIDTH(mi); cryst->win_height = MI_HEIGHT(mi); cell_min = min(cryst->win_width / 2 + 1, MIN_CELL); cell_min = min(cell_min, cryst->win_height / 2 + 1); cryst->planegroup = NRAND(17); cryst->invert = NRAND(2); if (MI_IS_VERBOSE(mi)) (void) fprintf(stdout, "Selected plane group no %d\n", cryst->planegroup + 1); if (cryst->planegroup > 11) cryst->gamma = 120.0; else if (cryst->planegroup < 2) cryst->gamma = 60.0 + NRAND(60); else cryst->gamma = 90.0; neqv = numops[2 * cryst->planegroup] - numops[2 * cryst->planegroup + 1]; if (centro[cryst->planegroup] == True) neqv = 2 * neqv; if (primitive[cryst->planegroup] == False) neqv = 2 * neqv; if (nx > 0) cryst->nx = nx; else if (nx < 0) cryst->nx = NRAND(-nx) + 1; else cryst->nx = DEF_NX1; if (cryst->planegroup > 8) cryst->ny = cryst->nx; else if (ny > 0) cryst->ny = ny; else if (ny < 0) cryst->ny = NRAND(-ny) + 1; else cryst->ny = DEF_NY1; neqv = neqv * cryst->nx * cryst->ny; cryst->num_atom = MI_COUNT(mi); max_atoms = MI_COUNT(mi); if (cryst->num_atom == 0) { cryst->num_atom = DEF_NUM_ATOM; max_atoms = DEF_NUM_ATOM; } else if (cryst->num_atom < 0) { max_atoms = -cryst->num_atom; cryst->num_atom = NRAND(-cryst->num_atom) + 1; } if (neqv > 1) cryst->num_atom = cryst->num_atom / neqv + 1; if (cryst->atom == NULL) cryst->atom = (crystalatom *) calloc(max_atoms, sizeof ( crystalatom)); if (maxsize) { if (cryst->planegroup < 13) { cryst->gamma = 90.0; cryst->offset_w = 0; cryst->offset_h = 0; if (cryst->planegroup < 10) { cryst->b = cryst->win_height; cryst->a = cryst->win_width; } else { cryst->b = min(cryst->win_height, cryst->win_width); cryst->a = cryst->b; } } else { cryst->gamma = 120.0; cryst->a = (int) (cryst->win_width * 2.0 / 3.0); cryst->b = cryst->a; cryst->offset_h = (int) (cryst->b * 0.25 * cos((cryst->gamma - 90) * PI_RAD)); cryst->offset_w = (int) (cryst->b * 0.5); } } else { int max_repeat = 10; cryst->offset_w = -1; while (max_repeat-- && (cryst->offset_w < 4 || (int) (cryst->offset_w - cryst->b * sin((cryst->gamma - 90) * PI_RAD)) < 4) ) { cryst->b = NRAND((int) (cryst->win_height / (cos((cryst->gamma - 90) * PI_RAD))) - cell_min) + cell_min; if (cryst->planegroup > 8) cryst->a = cryst->b; else cryst->a = NRAND(cryst->win_width - cell_min) + cell_min; cryst->offset_w = (int) ((cryst->win_width - (cryst->a - cryst->b * sin((cryst->gamma - 90) * PI_RAD))) / 2.0); } cryst->offset_h = (int) ((cryst->win_height - cryst->b * cos(( cryst->gamma - 90) * PI_RAD)) / 2.0); if (!centre) { if (cryst->offset_h > 0) cryst->offset_h = NRAND(2 * cryst->offset_h); cryst->offset_w = (int) (cryst->win_width - cryst->a - cryst->b * fabs(sin((cryst->gamma - 90) * PI_RAD))); if (cryst->gamma > 90.0) { if (cryst->offset_w > 0) cryst->offset_w = NRAND(cryst->offset_w) + (int) (cryst->b * sin((cryst->gamma - 90) * PI_RAD)); else cryst->offset_w = (int) (cryst->b * sin((cryst->gamma - 90) * PI_RAD)); } else if (cryst->offset_w > 0) cryst->offset_w = NRAND(cryst->offset_w); else cryst->offset_w = 0; } } size_atom = min((int) ((float) (cryst->a) / 40.) + 1, (int) ((float) (cryst->b) / 40.) + 1); if (MI_SIZE(mi) < size_atom) { if (MI_SIZE(mi) < -size_atom) size_atom = -size_atom; else size_atom = MI_SIZE(mi); } cryst->a = cryst->a / cryst->nx; cryst->b = cryst->b / cryst->ny; if (MI_IS_INSTALL(mi) && MI_NPIXELS(mi) > 2) { /* Set up colour map */ if (cryst->colors && cryst->ncolors && !cryst->no_colors) free_colors(mi->xgwa.screen, cryst->cmap, cryst->colors, cryst->ncolors); if (cryst->colors) (void) free((void *) cryst->colors); cryst->colors = 0; cryst->ncolors = MI_NCOLORS(mi); if (cryst->ncolors < 2) cryst->ncolors = 2; if (cryst->ncolors <= 2) cryst->mono_p = True; else cryst->mono_p = False; if (cryst->mono_p) cryst->colors = 0; else cryst->colors = (XColor *) malloc(sizeof (*cryst->colors) * (cryst->ncolors + 1)); cryst->cycle_p = has_writable_cells(mi->xgwa.screen, MI_VISUAL(mi)); if (cryst->cycle_p) { if (MI_IS_FULLRANDOM(mi)) { if (!NRAND(8)) cryst->cycle_p = False; else cryst->cycle_p = True; } else { cryst->cycle_p = cycle_p; } } if (!cryst->mono_p) { if (!(LRAND() % 10)) make_random_colormap(mi->xgwa.screen, MI_VISUAL(mi), cryst->cmap, cryst->colors, &cryst->ncolors, True, True, &cryst->cycle_p, True); else if (!(LRAND() % 2)) make_uniform_colormap(mi->xgwa.screen, MI_VISUAL(mi), cryst->cmap, cryst->colors, &cryst->ncolors, True, &cryst->cycle_p, True); else make_smooth_colormap(mi->xgwa.screen, MI_VISUAL(mi), cryst->cmap, cryst->colors, &cryst->ncolors, True, &cryst->cycle_p, True); } #if 0 /* #### wrong! -jwz */ XInstallColormap(display, cryst->cmap); #endif if (cryst->ncolors < 2) { cryst->ncolors = 2; cryst->no_colors = True; } else cryst->no_colors = False; if (cryst->ncolors <= 2) cryst->mono_p = True; if (cryst->mono_p) cryst->cycle_p = False; } for (i = 0; i < cryst->num_atom; i++) { crystalatom *atom0; atom0 = &cryst->atom[i]; if (MI_IS_INSTALL(mi) && MI_NPIXELS(mi) > 2) { if (cryst->ncolors > 2) atom0->colour = NRAND(cryst->ncolors - 2) + 2; else atom0->colour = 1; /* Just in case */ } else { if (MI_NPIXELS(mi) > 2) atom0->colour = MI_PIXEL(mi, NRAND(MI_NPIXELS(mi))); else atom0->colour = 1; /*Xor'red so WHITE may not be appropriate */ } atom0->x0 = NRAND(cryst->a); atom0->y0 = NRAND(cryst->b); atom0->velocity[0] = NRAND(7) - 3; atom0->velocity[1] = NRAND(7) - 3; atom0->velocity_a = (NRAND(7) - 3) * PI_RAD; atom0->angle = NRAND(90) * PI_RAD; atom0->at_type = NRAND(3); if (size_atom == 0) atom0->size_at = DEF_SIZ_ATOM; else if (size_atom > 0) atom0->size_at = size_atom; else atom0->size_at = NRAND(-size_atom) + 1; atom0->size_at++; if (atom0->at_type == 2) atom0->num_point = 3; else atom0->num_point = 4; crystal_setupatom(atom0, cryst->gamma); } XSetFunction(display, cryst->gc, GXcopy); if (MI_NPIXELS(mi) > 2) cryst->grid_pixel = MI_PIXEL(mi, NRAND(MI_NPIXELS(mi))); else cryst->grid_pixel = MI_WHITE_PIXEL(mi); cryst->inx = NRAND(cryst->nx); cryst->iny = NRAND(cryst->ny); } XSCREENSAVER_MODULE ("Crystal", crystal)