/* -*- Mode: C; tab-width: 4 -*- */
/* strange --- strange attractors */
-#if !defined( lint ) && !defined( SABER )
+#if 0
static const char sccsid[] = "@(#)strange.c 5.00 2000/11/01 xlockmore";
-
#endif
/*-
- * Copyright (c) 1997 by Massimino Pascal <Pascal.Massimon@ens.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.
- *
- * 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: jwz@jwz.org: turned into a standalone program.
- * Made it render into an offscreen bitmap and then copy
- * that onto the screen, to reduce flicker.
- *
- * strange attractors are not so hard to find...
- */
+* Copyright (c) 1997 by Massimino Pascal <Pascal.Massimon@ens.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.
+*
+* 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: jwz@jwz.org: turned into a standalone program.
+* Made it render into an offscreen bitmap and then copy
+* that onto the screen, to reduce flicker.
+*
+* strange attractors are not so hard to find...
+*/
+
+/* TODO: Bring over tweaks from 3.x version.
+* For a good idea of what's missing, diff strange.c.20081107-good2 against strange.c-3.29
+* We forked from the 3.29 series at 20081107, so anything added since then may be missing.
+*/
#ifdef STANDALONE
-#define MODE_strange
-#define PROGCLASS "Strange"
-#define HACK_INIT init_strange
-#define HACK_DRAW draw_strange
-#define strange_opts xlockmore_opts
-#define DEFAULTS "*delay: 2000 \n" \
- "*ncolors: 100 \n"
-#define SMOOTH_COLORS
-#include "xlockmore.h" /* from the xscreensaver distribution */
+# define MODE_strange
+# define DEFAULTS "*delay: 10000 \n" \
+ "*ncolors: 100 \n" \
+ "*fpsSolid: True \n" \
+ "*ignoreRotation: True \n" \
+
+# define SMOOTH_COLORS
+# define refresh_strange 0
+# define strange_handle_event 0
+# include "xlockmore.h" /* from the xscreensaver distribution */
#else /* !STANDALONE */
-#include "xlock.h" /* from the xlockmore distribution */
+# include "xlock.h" /* from the xlockmore distribution */
#endif /* !STANDALONE */
#ifdef MODE_strange
+#define DEF_CURVE "10"
+#define DEF_POINTS "5500"
-ModeSpecOpt strange_opts =
-{0, (XrmOptionDescRec *) NULL, 0, (argtype *) NULL, (OptionStruct *) NULL};
+/*static int curve;*/
+static int points;
+
+static XrmOptionDescRec opts[] =
+{
+/* {"-curve", ".strange.curve", XrmoptionSepArg, 0}, */
+ {"-points", ".strange.points", XrmoptionSepArg, 0},
+};
+static argtype vars[] =
+{
+/* {&curve, "curve", "Curve", DEF_CURVE, t_Int},*/
+ {&points, "points", "Points", DEF_POINTS, t_Int},
+};
+static OptionStruct desc[] =
+{
+/* {"-curve", "set the curve factor of the attractors"},*/
+ {"-points", "change the number of points/iterations each frame"},
+};
+ENTRYPOINT ModeSpecOpt strange_opts =
+{sizeof opts / sizeof opts[0], opts,
+sizeof vars / sizeof vars[0], vars, desc};
#ifdef USE_MODULES
ModStruct strange_description =
{"strange", "init_strange", "draw_strange", "release_strange",
- "init_strange", "init_strange", (char *) NULL, &strange_opts,
- 1000, 1, 1, 1, 64, 1.0, "",
- "Shows strange attractors", 0, NULL};
+"init_strange", "init_strange", (char *) NULL, &strange_opts,
+1000, 1, 1, 1, 64, 1.0, "",
+"Shows strange attractors", 0, NULL};
+#endif
+#ifdef HAVE_COCOA
+# define NO_DBUF
#endif
typedef float DBL;
/* #define UNIT2 (3140*UNIT/1000) */
#define SKIP_FIRST 100
-#define MAX_POINTS 5500
#define DBL_To_PRM(x) (PRM)( (DBL)(UNIT)*(x) )
DBL_To_PRM( 1.0-exp( -16.0*(a)/UNIT2 ) )
#endif
+/* useAccumulator performs two functions:
+* If it is defined, then support for the accumulator will be compiled.
+* It is also the condition for which the accumulator renderer will engage.
+*/
+#define useAccumulator (Root->Max_Pt > 6000)
+#define ACC_GAMMA 10.0
+#define NUM_COLS 150
+/* Extra options: */
+#define VARY_SPEED_TO_AVOID_BOREDOM
+#define POINTS_HISTORY
+#define MERGE_FRAMES 3
+
/******************************************************************/
#define MAX_PRM 3*5
int Width, Height;
Pixmap dbuf; /* jwz */
GC dbuf_gc;
+ #ifdef useAccumulator
+ int **accMap;
+ #endif
} ATTRACTOR;
static ATTRACTOR *Root = (ATTRACTOR *) NULL;
+#ifdef useAccumulator
+static XColor* cols;
+#endif
+
+#ifdef POINTS_HISTORY
+static int numOldPoints;
+static int* oldPointsX;
+static int* oldPointsY;
+static int oldPointsIndex;
+static int startedClearing;
+#endif
+
static DBL Amp_Prm[MAX_PRM] =
{
1.0, 3.5, 3.5, 2.5, 4.7,
/***************************************************************/
- /* 2 examples of non-linear map */
+ /* 2 examples of non-linear map */
static void
Iterate_X2(ATTRACTOR * A, PRM x, PRM y, PRM * xo, PRM * yo)
}
}
-void
+ENTRYPOINT void
draw_strange(ModeInfo * mi)
{
int i, j, n, Cur_Pt;
Cur_Pt = A->Cur_Pt;
Iterate = A->Iterate;
- u = (DBL) (A->Count) / 1000.0;
+ u = (DBL) (A->Count) / 40000.0;
for (j = MAX_PRM - 1; j >= 0; --j)
A->Prm[j] = DBL_To_PRM((1.0 - u) * A->Prm1[j] + u * A->Prm2[j]);
+ /* We collect the accumulation of the orbits in the 2d int array field. */
+#ifndef POINTS_HISTORY
+ #ifdef useAccumulator
+ if (useAccumulator) {
+ for (i=0;i<A->Width;i++) {
+ for (j=0;j<A->Height;j++) {
+ A->accMap[i][j] = 0;
+
+ }
+ }
+ }
+ #endif
+#endif
+
x = y = DBL_To_PRM(.0);
for (n = SKIP_FIRST; n; --n) {
(*Iterate) (A, x, y, &xo, &yo);
Ly = (DBL) A->Height / UNIT / 2.2;
for (n = A->Max_Pt; n; --n) {
(*Iterate) (A, x, y, &xo, &yo);
- Buf->x = (int) (Lx * (x + DBL_To_PRM(1.1)));
- Buf->y = (int) (Ly * (DBL_To_PRM(1.1) - y));
+ #ifdef useAccumulator
+ if (useAccumulator) {
+ int mx,my;
+ mx = (short) ( A->Width*0.1 + A->Width*0.8 * (xo - xmin) / (xmax - xmin) );
+ my = (short) ( A->Width*0.1 + (A->Height - A->Width*0.2) * (yo - ymin) / (ymax - ymin) );
+ if (mx>=0 && my>=0 && mx<A->Width && my<A->Height) {
+ A->accMap[mx][my]++;
+ }
+#ifdef POINTS_HISTORY
+ /* #define clearOldPoint(i) { if (startedClearing) { field[oldPoints[i].x][oldPoints[i].y]--; } }
+ #define saveUnplot(X,Y) { clearOldPoint(oldPointsIndex) oldPoints[oldPointsIndex].x = X; oldPoints[oldPointsIndex].y = Y; oldPointsIndex = (oldPointsIndex + 1) % numOldPoints; if (oldPointsIndex==0) { startedClearing=1; } }
+ saveUnplot(mx,my) */
+ if (startedClearing) {
+ int oldX = oldPointsX[oldPointsIndex];
+ int oldY = oldPointsY[oldPointsIndex];
+ if (oldX>=0 && oldY>=0 && oldX<A->Width && oldY<A->Height) {
+ A->accMap[oldX][oldY]--;
+ }
+ }
+ oldPointsX[oldPointsIndex] = mx;
+ oldPointsY[oldPointsIndex] = my;
+ oldPointsIndex = (oldPointsIndex + 1) % numOldPoints;
+ if (oldPointsIndex==0) { startedClearing=1; }
+#endif
+ } else {
+ #endif
+ Buf->x = (int) (Lx * (x + DBL_To_PRM(1.1)));
+ Buf->y = (int) (Ly * (DBL_To_PRM(1.1) - y));
+ Buf++;
+ A->Cur_Pt++;
+ #ifdef useAccumulator
+ }
+ #endif
/* (void) fprintf( stderr, "X,Y: %d %d ", Buf->x, Buf->y ); */
- Buf++;
- A->Cur_Pt++;
if (xo > xmax)
xmax = xo;
else if (xo < xmin)
XSetForeground(display, gc, MI_BLACK_PIXEL(mi));
+ #ifdef useAccumulator
+ if (useAccumulator) {
+ float colorScale;
+ int col;
+ #ifdef VARY_SPEED_TO_AVOID_BOREDOM
+ int pixelCount = 0;
+ #endif
+ colorScale = (A->Width*A->Height/640.0/480.0*800000.0/(float)A->Max_Pt*(float)NUM_COLS/256);
+ if (A->dbuf != None) {
+ XSetForeground(display, A->dbuf_gc, 0);
+ XFillRectangle(display, A->dbuf, A->dbuf_gc, 0, 0, A->Width, A->Height);
+ } else {
+ XSetForeground(display, gc, MI_BLACK_PIXEL(mi));
+ XFillRectangle(display, window, gc, 0, 0, A->Width, A->Height);
+ }
+ for (i=0;i<A->Width;i++) {
+ for (j=0;j<A->Height;j++) {
+ if (A->accMap[i][j]>0) {
+ col = (float)A->accMap[i][j] * colorScale;
+ if (col>NUM_COLS-1) {
+ col = NUM_COLS-1;
+ }
+ #ifdef VARY_SPEED_TO_AVOID_BOREDOM
+ if (col>0) {
+ if (col<NUM_COLS-1) /* we don't count maxxed out pixels */
+ pixelCount++;
+ }
+ #endif
+ if (MI_NPIXELS(mi) < 2)
+ XSetForeground(display, gc, MI_WHITE_PIXEL(mi));
+ else
+ /*XSetForeground(display, gc, MI_PIXEL(mi, A->Col % MI_NPIXELS(mi)));*/
+ XSetForeground(display, gc, cols[col].pixel);
+ if (A->dbuf != None) {
+ XSetForeground(display, A->dbuf_gc, cols[col].pixel);
+ XDrawPoint(display, A->dbuf, A->dbuf_gc, i, j);
+ } else {
+ XSetForeground(display, gc, cols[col].pixel);
+ XDrawPoint(display, window, gc, i, j);
+ }
+ }
+ }
+ }
+ if (A->dbuf != None) {
+ XCopyArea(display, A->dbuf, window, gc, 0, 0, A->Width, A->Height, 0, 0);
+ }
+ #ifdef VARY_SPEED_TO_AVOID_BOREDOM
+ /* Increaase the rate of change of the parameters if the attractor has become visually boring. */
+ if ((xmax - xmin < DBL_To_PRM(.2)) && (ymax - ymin < DBL_To_PRM(.2))) {
+ A->Speed *= 1.25;
+ } else if (pixelCount>0 && pixelCount<A->Width*A->Height/1000) {
+ A->Speed *= 1.25; /* A->Count = 1000; */
+ } else {
+ A->Speed = 4; /* reset to normal/default */
+ }
+ if (A->Speed > 32)
+ A->Speed = 32;
+ A->Count += A->Speed;
+ if (A->Count >= 1000) {
+ for (i = MAX_PRM - 1; i >= 0; --i)
+ A->Prm1[i] = A->Prm2[i];
+ Random_Prm(A->Prm2);
+ A->Count = 0;
+ }
+ #endif
+ } else {
+ #endif
+
if (A->dbuf != None) { /* jwz */
XSetForeground(display, A->dbuf_gc, 0);
/* XDrawPoints(display, A->dbuf, A->dbuf_gc, A->Buffer1,
- Cur_Pt,CoordModeOrigin); */
+ Cur_Pt,CoordModeOrigin); */
XFillRectangle(display, A->dbuf, A->dbuf_gc, 0, 0, A->Width, A->Height);
} else
XDrawPoints(display, window, gc, A->Buffer1, Cur_Pt, CoordModeOrigin);
} else
XDrawPoints(display, window, gc, A->Buffer2, A->Cur_Pt, CoordModeOrigin);
+ #ifdef useAccumulator
+ }
+ #endif
+
Buf = A->Buffer1;
A->Buffer1 = A->Buffer2;
A->Buffer2 = Buf;
A->Count = 0;
}
A->Col++;
+ mi->recursion_depth = A->Count;
}
/***************************************************************/
-void
+ENTRYPOINT void
init_strange(ModeInfo * mi)
{
Display *display = MI_DISPLAY(mi);
Window window = MI_WINDOW(mi);
+#ifndef NO_DBUF
GC gc = MI_GC(mi);
+#endif
ATTRACTOR *Attractor;
+#ifdef POINTS_HISTORY
+ startedClearing=0;
+ oldPointsIndex=0;
+#endif
+
if (Root == NULL) {
if ((Root = (ATTRACTOR *) calloc(MI_NUM_SCREENS(mi),
sizeof (ATTRACTOR))) == NULL)
Attractor->Fold[i] = DBL_To_PRM(x);
}
}
+
+ Attractor->Max_Pt = points;
+
if (Attractor->Buffer1 == NULL)
- if ((Attractor->Buffer1 = (XPoint *) calloc(MAX_POINTS,
+ if ((Attractor->Buffer1 = (XPoint *) calloc(Attractor->Max_Pt,
sizeof (XPoint))) == NULL) {
free_strange(display, Attractor);
return;
}
if (Attractor->Buffer2 == NULL)
- if ((Attractor->Buffer2 = (XPoint *) calloc(MAX_POINTS,
+ if ((Attractor->Buffer2 = (XPoint *) calloc(Attractor->Max_Pt,
sizeof (XPoint))) == NULL) {
free_strange(display, Attractor);
return;
}
- Attractor->Max_Pt = MAX_POINTS;
Attractor->Width = MI_WIDTH(mi);
Attractor->Height = MI_HEIGHT(mi);
#ifndef NO_DBUF
if (Attractor->dbuf != None)
XFreePixmap(display, Attractor->dbuf);
+#ifdef useAccumulator
+#define colorDepth ( useAccumulator ? MI_DEPTH(mi) : 1 )
+#else
+#define colorDepth 1
+#endif
Attractor->dbuf = XCreatePixmap(display, window,
- Attractor->Width, Attractor->Height, 1);
+ Attractor->Width, Attractor->Height, colorDepth);
/* Allocation checked */
if (Attractor->dbuf != None) {
XGCValues gcv;
gcv.foreground = 0;
gcv.background = 0;
+#ifndef HAVE_COCOA
gcv.graphics_exposures = False;
+#endif /* HAVE_COCOA */
gcv.function = GXcopy;
if (Attractor->dbuf_gc != None)
XFreeGC(display, Attractor->dbuf_gc);
if ((Attractor->dbuf_gc = XCreateGC(display, Attractor->dbuf,
- GCForeground | GCBackground | GCGraphicsExposures | GCFunction,
+#ifndef HAVE_COCOA
+ GCGraphicsExposures |
+#endif /* HAVE_COCOA */
+ GCFunction | GCForeground | GCBackground,
&gcv)) == None) {
XFreePixmap(display, Attractor->dbuf);
Attractor->dbuf = None;
}
#endif
+
+#ifdef useAccumulator
+ #define A Attractor
+ if (useAccumulator) {
+ XWindowAttributes xgwa;
+ int i,j;
+ XGetWindowAttributes (display, window, &xgwa);
+ /* cmap = xgwa.colormap; */
+ /* cmap = XCreateColormap(display, window, MI_VISUAL(mi), AllocAll); */
+ Attractor->accMap = (int**)calloc(Attractor->Width,sizeof(int*));
+ for (i=0;i<Attractor->Width;i++) {
+ Attractor->accMap[i] = (int*)calloc(Attractor->Height,sizeof(int));
+ for (j=0;j<Attractor->Height;j++) {
+ Attractor->accMap[i][j] = 0;
+ }
+ }
+#ifdef POINTS_HISTORY
+ numOldPoints = A->Max_Pt * MERGE_FRAMES;
+ oldPointsX = (int*)calloc(numOldPoints,sizeof(int));
+ oldPointsY = (int*)calloc(numOldPoints,sizeof(int));
+#endif
+ cols = (XColor*)calloc(NUM_COLS,sizeof(XColor));
+ for (i=0;i<NUM_COLS;i++) {
+ float li;
+ #define MINBLUE 1
+ #define FULLBLUE 128
+ li = MINBLUE + (255.0-MINBLUE) * log(1.0 + ACC_GAMMA*(float)i/NUM_COLS) / log(1.0 + ACC_GAMMA);
+ if (li<FULLBLUE) {
+ cols[i].red = 0;
+ cols[i].green = 0;
+ cols[i].blue = 65536*li/FULLBLUE;
+ } else {
+ cols[i].red = 65536*(li-FULLBLUE)/(256-FULLBLUE);
+ cols[i].green = 65536*(li-FULLBLUE)/(256-FULLBLUE);
+ cols[i].blue = 65535;
+ }
+ XAllocColor (display, xgwa.colormap, &cols[i]);
+ /*
+ if (!XAllocColor(MI_DISPLAY(mi), cmap, &cols[i])) {
+ if (!XAllocColor(display, cmap, &cols[i])) {
+ cols[i].pixel = WhitePixel (display, DefaultScreen (display));
+ cols[i].red = cols[i].green = cols[i].blue = 0xFFFF;
+ }
+ */
+ }
+ /*
+ XSetWindowColormap(display, window, cmap);
+ (void) XSetWMColormapWindows(display, window, &window, 1);
+ XInstallColormap(display, cmap);
+ XStoreColors(display, cmap, cols, 256);
+ */
+ }
+ #undef A
+#endif
MI_CLEARWINDOW(mi);
/* Do not want any exposure events from XCopyPlane */
XSetGraphicsExposures(display, MI_GC(mi), False);
}
+ENTRYPOINT void
+reshape_strange(ModeInfo * mi, int width, int height)
+{
+ XClearWindow (MI_DISPLAY (mi), MI_WINDOW(mi));
+ init_strange (mi);
+}
+
/***************************************************************/
-void
+ENTRYPOINT void
release_strange(ModeInfo * mi)
{
if (Root != NULL) {
int screen;
+#ifdef useAccumulator
+ int i;
+ (void) free((void *) cols);
+ for (i=0;i<Root->Width;i++) {
+ (void) free((void *) Root->accMap[i]);
+ }
+ (void) free((void *) Root->accMap);
+#endif
+#ifdef POINTS_HISTORY
+ free(oldPointsX);
+ free(oldPointsY);
+#endif
for (screen = 0; screen < MI_NUM_SCREENS(mi); ++screen)
free_strange(MI_DISPLAY(mi), &Root[screen]);
(void) free((void *) Root);
}
}
+XSCREENSAVER_MODULE ("Strange", strange)
+
#endif /* MODE_strange */
projects / xscreensaver / blobdiff