-/* -*- Mode: C; tab-width: 4 -*- */
-/* forest --- binary trees in a fractal forest */
-
-#if !defined( lint ) && !defined( SABER )
-static const char sccsid[] = "@(#)forest.c 5.00 2000/11/01 xlockmore";
-
-#endif
-
-/*-
- * Copyright (c) 1995 Pascal Pensa <pensa@aurora.unice.fr>
- *
- * Original idea : Guillaume Ramey <ramey@aurora.unice.fr>
- *
- * 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.
+/* forest.c (aka xtree.c), Copyright (c) 1999
+ * Peter Baumung <unn6@rz.uni-karlsruhe.de>
*
- * 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.
- *
- * Revision History:
- * 01-Nov-2000: Allocation checks
- * 10-May-1997: Compatible with xscreensaver
+ * Most code taken from
+ * xscreensaver, Copyright (c) 1992, 1995, 1997
+ * Jamie Zawinski <jwz@netscape.com>
*
+ * 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.
*/
-#ifdef STANDALONE
-#define MODE_forest
-#define PROGCLASS "Forest"
-#define HACK_INIT init_forest
-#define HACK_DRAW draw_forest
-#define forest_opts xlockmore_opts
-#define DEFAULTS "*delay: 500000 \n" \
- "*count: 100 \n" \
- "*cycles: 200 \n" \
- "*ncolors: 20 \n"
-#define UNIFORM_COLORS
-#include "xlockmore.h" /* in xscreensaver distribution */
-#else /* STANDALONE */
-#include "xlock.h" /* in xlockmore distribution */
-
-#endif /* STANDALONE */
-
-#ifdef MODE_forest
-
-ModeSpecOpt forest_opts =
-{0, (XrmOptionDescRec *) NULL, 0, (argtype *) NULL, (OptionStruct *) NULL};
+#include "config.h"
-#ifdef USE_MODULES
-ModStruct forest_description =
-{"forest", "init_forest", "draw_forest", "release_forest",
- "refresh_forest", "init_forest", (char *) NULL, &forest_opts,
- 400000, 100, 200, 1, 64, 1.0, "",
- "Shows binary trees of a fractal forest", 0, NULL};
+/* ****************************** NOTE ******************************
-#endif
+ This is not the xlockmore version of forest, but a much better
+ looking rewrite. Be careful not to delete it in a merging frenzy...
-#define MINTREES 1
-
-#define MINHEIGHT 20 /* Tree height range */
-#define MAXHEIGHT 40
-
-#define MINANGLE 15 /* (degree) angle between soon */
-#define MAXANGLE 35
-#define RANDANGLE 15 /* (degree) Max random angle from default */
-
-#define REDUCE 90 /* Height % from father */
-
-#define ITERLEVEL 10 /* Tree iteration */
-
-#define COLORSPEED 2 /* Color increment */
-
-/* degree to radian */
-#define DEGTORAD(x) (((float)(x)) * M_PI / 180.0)
+ **********************************************************************
+ */
-#define RANGE_RAND(min,max) ((min) + NRAND((max) - (min)))
+#ifdef STANDALONE
+# define PROGCLASS "Forest" /*"XTree"*/
+# define HACK_INIT init_trees
+# define HACK_DRAW draw_trees
+# define trees_opts xlockmore_opts
+# define DEFAULTS "*delay: 500000 \n" \
+ "*ncolors: 20 \n" \
+ "*eraseSpeed: 400 \n" \
+ "*eraseMode: -1 \n" \
+ "*installColormap False"
+# include "xlockmore.h" /* from the xscreensaver distribution */
+#else /* !STANDALONE */
+# include "xlock.h" /* from the xlockmore distribution */
+#endif /* !STANDALONE */
+
+ModeSpecOpt trees_opts = {0, NULL, 0, NULL, NULL};
typedef struct {
- int width;
- int height;
- int time; /* up time */
- int ntrees;
-} foreststruct;
-
-static foreststruct *forests = (foreststruct *) NULL;
-
-static void
-draw_tree(ModeInfo * mi,
- short int x, short int y, short int len,
- float a, float as, short int c, short int level)
- /* Father's end */
- /* Length */
- /* color */
- /* Height level */
- /* Father's angle */
- /* Father's angle step */
-{
- Display *display = MI_DISPLAY(mi);
- Window window = MI_WINDOW(mi);
- GC gc = MI_GC(mi);
- short x_1, y_1, x_2, y_2;
- float a1, a2;
-
- /* left */
-
- a1 = a + as + DEGTORAD(NRAND(2 * RANDANGLE) - RANDANGLE);
-
- x_1 = x + (short) (COSF(a1) * ((float) len));
- y_1 = y + (short) (SINF(a1) * ((float) len));
-
- /* right */
-
- a2 = a - as + DEGTORAD(NRAND(2 * RANDANGLE) - RANDANGLE);
-
- x_2 = x + (short) (COSF(a2) * ((float) len));
- y_2 = y + (short) (SINF(a2) * ((float) len));
-
- if (MI_NPIXELS(mi) > 2) {
- XSetForeground(display, gc, MI_PIXEL(mi, c));
- c = (c + COLORSPEED) % MI_NPIXELS(mi);
- } else
- XSetForeground(display, gc, MI_WHITE_PIXEL(mi));
-
- XDrawLine(display, window, gc, x, y, x_1, y_1);
- XDrawLine(display, window, gc, x, y, x_2, y_2);
-
- if (level < 2) {
- XDrawLine(display, window, gc, x + 1, y, x_1 + 1, y_1);
- XDrawLine(display, window, gc, x + 1, y, x_2 + 1, y_2);
- }
- len = (len * REDUCE * 10) / 1000;
-
- if (level < ITERLEVEL) {
- draw_tree(mi, x_1, y_1, len, a1, as, c, level + 1);
- draw_tree(mi, x_2, y_2, len, a2, as, c, level + 1);
- }
+ int x;
+ int y;
+ int thick;
+ double size;
+ long color;
+ int toDo;
+ int season;
+} treestruct;
+
+static treestruct *trees = NULL;
+
+XColor colors[20];
+int color;
+
+static long colorM[12] = {0xff0000, 0xff8000, 0xffff00, 0x80ff00,
+ 0x00ff00, 0x00ff80, 0x00ffff, 0x0080ff,
+ 0x0000ff, 0x8000ff, 0xff00ff, 0xff0080};
+
+static long colorV[12] = {0x0a0000, 0x0a0500, 0x0a0a00, 0x050a00,
+ 0x000a00, 0x000a05, 0x000a0a, 0x00050a,
+ 0x00000a, 0x05000a, 0x0a000a, 0x0a0005};
+
+void init_trees(ModeInfo * mi) {
+ unsigned long pixels[20];
+ treestruct *tree;
+ Display *display = MI_DISPLAY(mi);
+ GC gc = MI_GC(mi);
+ int i;
+
+ if (trees == NULL) {
+ trees = (treestruct *) calloc(MI_NUM_SCREENS(mi), sizeof (treestruct));
+ if (trees == NULL) {
+ return;
+ }
+
+ if (mi->npixels > 20) {
+ printf("%d colors selected. Setting limit to 20...\n", mi->npixels);
+ mi->npixels = 20;
+ }
+
+ if (mi->npixels < 4) {
+ for (i = 0; i < mi->npixels; i++) {
+ colors[i].red = 65535 * (i & 1);
+ colors[i].green = 65535 * (i & 1);
+ colors[i].blue = 65535 * (i & 1);
+ colors[i].flags = DoRed | DoGreen | DoBlue;
+ }
+ } else {
+ if (mi->npixels < 8) {
+ for (i = 0; i < mi->npixels; i++) {
+ colors[i].red = 32768 + 4096 * (i % 4);
+ colors[i].green = 32768 + 4096 * (i % 4);
+ colors[i].blue = 32768 + 4096 * (i % 4);
+ colors[i].flags = DoRed | DoGreen | DoBlue;
+ }
+ } else {
+ for (i = 0; i < mi->npixels; i++) {
+ colors[i].red = 24576 + 4096 * (i % 4);
+ colors[i].green = 10240 + 2048 * (i % 4);
+ colors[i].blue = 0;
+ colors[i].flags = DoRed | DoGreen | DoBlue;
+ }
+ }
+ }
+
+ for (i = 0; i < mi->npixels; i++)
+ if (!XAllocColor(display, mi->xgwa.colormap, &colors[i])) break;
+ color = i;
+
+ XSetForeground(display, gc, colors[1].pixel);
+ }
+
+ XClearWindow(display, MI_WINDOW(mi));
+ XSetLineAttributes(display, gc, 2, LineSolid, CapButt, JoinMiter);
+ tree = &trees[MI_SCREEN(mi)];
+ tree->toDo = 25;
+ tree->season = NRAND(12);
+
+ for (i = 4; i < mi->npixels; i++) {
+ int sIndex = (tree->season + (i-4) / 4) % 12;
+ long color = colorM[sIndex] - 2 * colorV[sIndex] * (i % 4);
+ colors[i].red = (color & 0xff0000) / 256;
+ colors[i].green = (color & 0x00ff00);
+ colors[i].blue = (color & 0x0000ff) * 256;
+ colors[i].flags = DoRed | DoGreen | DoBlue;
+ }
+
+ for (i = 0; i < color; i++)
+ pixels[i] = colors[i].pixel;
+
+ XFreeColors(display, mi->xgwa.colormap, pixels, mi->npixels, 0L);
+
+ for (i = 0; i < mi->npixels; i++)
+ if (!XAllocColor(display, mi->xgwa.colormap, &colors[i])) break;
+
+ color = i;
}
-void
-init_forest(ModeInfo * mi)
-{
- foreststruct *fp;
-
- if (forests == NULL) {
- if ((forests = (foreststruct *) calloc(MI_NUM_SCREENS(mi),
- sizeof (foreststruct))) == NULL)
- return;
- }
- fp = &forests[MI_SCREEN(mi)];
-
- fp->width = MI_WIDTH(mi);
- fp->height = MI_HEIGHT(mi);
- fp->time = 0;
-
- fp->ntrees = MI_COUNT(mi);
- if (fp->ntrees < -MINTREES)
- fp->ntrees = NRAND(-fp->ntrees - MINTREES + 1) + MINTREES;
- else if (fp->ntrees < MINTREES)
- fp->ntrees = MINTREES;
-
- MI_CLEARWINDOW(mi);
+double rRand(double a, double b) {
+ return (a+(b-a)*NRAND(10001)/10000.0);
}
-void
-draw_forest(ModeInfo * mi)
-{
- Display *display = MI_DISPLAY(mi);
- GC gc = MI_GC(mi);
- short x, y, x_2, y_2, len, c = 0;
- float a, as;
- foreststruct *fp;
-
- if (forests == NULL)
- return;
- fp = &forests[MI_SCREEN(mi)];
-
- MI_IS_DRAWN(mi) = True;
- if (fp->time < fp->ntrees) {
-
- x = RANGE_RAND(0, fp->width);
- y = RANGE_RAND(0, fp->height + MAXHEIGHT);
- a = -M_PI / 2.0 + DEGTORAD(NRAND(2 * RANDANGLE) - RANDANGLE);
- as = DEGTORAD(RANGE_RAND(MINANGLE, MAXANGLE));
- len = ((RANGE_RAND(MINHEIGHT, MAXHEIGHT) * (fp->width / 20)) / 50) + 2;
-
- if (MI_NPIXELS(mi) > 2) {
- c = NRAND(MI_NPIXELS(mi));
- XSetForeground(display, gc, MI_PIXEL(mi, c));
- c = (c + COLORSPEED) % MI_NPIXELS(mi);
- } else
- XSetForeground(display, gc, MI_WHITE_PIXEL(mi));
-
- x_2 = x + (short) (COSF(a) * ((float) len));
- y_2 = y + (short) (SINF(a) * ((float) len));
-
- XDrawLine(display, MI_WINDOW(mi), gc, x, y, x_2, y_2);
- XDrawLine(display, MI_WINDOW(mi), gc, x + 1, y, x_2 + 1, y_2);
-
- draw_tree(mi, x_2, y_2, (len * REDUCE) / 100, a, as, c, 1);
- }
- if (++fp->time > MI_CYCLES(mi)) {
- init_forest(mi);
- }
+void draw_line(ModeInfo * mi,
+ int x1, int y1, int x2, int y2,
+ double angle, int widths, int widthe) {
+
+ Display *display = MI_DISPLAY(mi);
+ GC gc = MI_GC(mi);
+ double sns = 0.5*widths*sin(angle + M_PI_2);
+ double css = 0.5*widths*cos(angle + M_PI_2);
+ double sne = 0.5*widthe*sin(angle + M_PI_2);
+ double cse = 0.5*widthe*cos(angle + M_PI_2);
+
+ int xs1 = (int) (x1-sns);
+ int xs2 = (int) (x1+sns);
+ int ys1 = (int) (y1-css);
+ int ys2 = (int) (y1+css);
+ int xe1 = (int) (x2-sne);
+ int xe2 = (int) (x2+sne);
+ int ye1 = (int) (y2-cse);
+ int ye2 = (int) (y2+cse);
+ int i;
+
+ for (i = 0; i < widths; i++) {
+ if (color >= 4)
+ XSetForeground(display, gc, colors[i*4/widths].pixel);
+ XDrawLine(display, MI_WINDOW(mi), gc,
+ xs1+(xs2-xs1)*i/widths, ys1+(ys2-ys1)*i/widths,
+ xe1+(xe2-xe1)*i/widths, ye1+(ye2-ye1)*i/widths);
+ }
}
-void
-release_forest(ModeInfo * mi)
-{
- if (forests != NULL) {
- (void) free((void *) forests);
- forests = (foreststruct *) NULL;
- }
+void draw_tree_rec(ModeInfo * mi, double thick, int x, int y, double angle) {
+ treestruct *tree = &trees[MI_SCREEN(mi)];
+ Display *display = MI_DISPLAY(mi);
+ GC gc = MI_GC(mi);
+ int length = (24+NRAND(12))*tree->size;
+ int a = (int) (x - length*sin(angle));
+ int b = (int) (y - length*cos(angle));
+ int i;
+
+ draw_line(mi, x, y, a, b, angle, thick*tree->size, 0.68*thick*tree->size);
+
+ if (thick > 2) {
+ draw_tree_rec(mi, 0.68*thick, a, b, 0.8*angle+rRand(-0.2, 0.2));
+ if (thick < tree->thick-1) {
+ draw_tree_rec(mi, 0.68*thick, a, b, angle+rRand(0.2, 0.9));
+ draw_tree_rec(mi, 0.68*thick, (a+x)/2, (b+y)/2, angle-rRand(0.2, 0.9));
+ }
+ }
+
+ if (thick < 0.5*tree->thick) {
+ int nleaf = 12 + NRAND(4);
+ XArc leaf[16];
+ for (i = 0; i < nleaf; i++) {
+ leaf[i].x = a + (int) (tree->size * rRand(-12, 12));
+ leaf[i].y = b + (int) (tree->size * rRand(-12, 12));
+ leaf[i].width = (int) (tree->size * rRand(2, 6));
+ leaf[i].height = leaf[i].width;
+ leaf[i].angle1 = 0;
+ leaf[i].angle2 = 360 * 64;
+ }
+ if (mi->npixels >= 4)
+ XSetForeground(display, gc, colors[tree->color+NRAND(4)].pixel);
+ XFillArcs(display, MI_WINDOW(mi), gc, leaf, nleaf);
+ }
}
-void
-refresh_forest(ModeInfo * mi)
-{
- MI_CLEARWINDOW(mi);
+void draw_trees(ModeInfo * mi) {
+ treestruct *tree = &trees[MI_SCREEN(mi)];
+ int width = MI_WIN_WIDTH(mi);
+ int height = MI_WIN_HEIGHT(mi);
+
+ if (--(tree->toDo) == 0) {
+ usleep(3000000);
+ init_trees(mi);
+ }
+
+ tree->x = NRAND(width);
+ tree->y = (int) (1.25 * height * (1 - tree->toDo / 23.0));
+ tree->thick = rRand(7, 12);
+ tree->size = height / 480.0;
+ if (color < 8) {
+ tree->color = 0;
+ } else {
+ tree->color = 4 * (1 + NRAND(color / 4 - 1));
+ }
+
+ draw_tree_rec(mi, tree->thick, tree->x, tree->y, rRand(-0.1, 0.1));
}
-#endif /* MODE_forest */
+void release_trees(ModeInfo * mi) {
+ if (trees != NULL) {
+ (void) free((void *) trees);
+ trees = NULL;
+ }
+}
projects / xscreensaver / blobdiff