-/* -*- Mode: C; tab-width: 4 -*- */
-/* ifs --- modified iterated functions system */
-
-#if 0
-static const char sccsid[] = "@(#)ifs.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.
- *
- * If this mode is weird and you have an old MetroX server, it is buggy.
- * There is a free SuSE-enhanced MetroX X server that is fine.
- *
- * When shown ifs, Diana Rose (4 years old) said, "It looks like dancing."
- *
- * 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.
- */
-
-#ifdef STANDALONE
-#define MODE_ifs
-#define PROGCLASS "IFS"
-#define HACK_INIT init_ifs
-#define HACK_DRAW draw_ifs
-#define ifs_opts xlockmore_opts
-#define DEFAULTS "*delay: 20000 \n" \
- "*ncolors: 100 \n"
-#define SMOOTH_COLORS
-#include "xlockmore.h" /* in xscreensaver distribution */
-#else /* STANDALONE */
-#include "xlock.h" /* in xlockmore distribution */
-#endif /* STANDALONE */
-
-#ifdef MODE_ifs
-
-ModeSpecOpt ifs_opts =
-{0, (XrmOptionDescRec *) NULL, 0, (argtype *) NULL, (OptionStruct *) NULL};
-
-#ifdef USE_MODULES
-ModStruct ifs_description =
-{"ifs", "init_ifs", "draw_ifs", "release_ifs",
- "init_ifs", "init_ifs", (char *) NULL, &ifs_opts,
- 1000, 1, 1, 1, 64, 1.0, "",
- "Shows a modified iterated function system", 0, NULL};
-
-#endif
-
-/*****************************************************/
-
-typedef float DBL;
-typedef int F_PT;
-
-/* typedef float F_PT; */
-
-/*****************************************************/
-
-#define FIX 12
-#define UNIT ( 1<<FIX )
-#define MAX_SIMI 6
-
- /* settings for a PC 120Mhz... */
-#define MAX_DEPTH_2 10
-#define MAX_DEPTH_3 6
-#define MAX_DEPTH_4 4
-#define MAX_DEPTH_5 3
-
-#define DBL_To_F_PT(x) (F_PT)( (DBL)(UNIT)*(x) )
-
-typedef struct Similitude_Struct SIMI;
-typedef struct Fractal_Struct FRACTAL;
-
-struct Similitude_Struct {
-
- DBL c_x, c_y;
- DBL r, r2, A, A2;
- F_PT Ct, St, Ct2, St2;
- F_PT Cx, Cy;
- F_PT R, R2;
-};
+/*Copyright © Chris Le Sueur (thefishface@gmail.com) February 2005
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be included
+in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR
+OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
+
+Ultimate thanks go to Massimino Pascal, who created the original
+xscreensaver hack, and inspired me with it's swirly goodness. This
+version adds things like variable quality, number of functions and also
+a groovier colouring mode.
+
+*/
+
+#include <assert.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+
+#include "screenhack.h"
+
+static float myrandom(float up)
+{
+ return(((float)random()/RAND_MAX)*up);
+}
-struct Fractal_Struct {
-
- int Nb_Simi;
- SIMI Components[5 * MAX_SIMI];
- int Depth, Col;
- int Count, Speed;
- int Width, Height, Lx, Ly;
- DBL r_mean, dr_mean, dr2_mean;
- int Cur_Pt, Max_Pt;
- XPoint *Buffer1, *Buffer2;
- Pixmap dbuf;
- GC dbuf_gc;
+static int delay;
+static int lensnum;
+static int length;
+static int mode;
+static Bool notranslate, noscale, norotate;
+float ht,wt;
+float hs,ws;
+int width,height;
+float r;
+long wcol;
+int coloffset;
+
+float nx,ny;
+
+int count;
+
+/*X stuff*/
+GC gc;
+Window w;
+Display *dpy;
+Pixmap backbuffer;
+XColor *colours;
+int ncolours;
+int screen_num;
+
+int blackColor, whiteColor;
+
+char *progclass = "IFS";
+
+char *defaults [] = {
+ ".lensnum: 3",
+ ".length: 9",
+ ".mode: 0",
+ ".colors: 200",
+ "*delay: 10000",
+ "*notranslate: False",
+ "*noscale: False",
+ "*norotate: False",
+ 0
};
-static FRACTAL *Root = (FRACTAL *) NULL, *Cur_F;
-static XPoint *Buf;
-static int Cur_Pt;
-
-
-/*****************************************************/
+XrmOptionDescRec options [] = {
+ { "-detail", ".length", XrmoptionSepArg, 0 },
+ { "-delay", ".delay", XrmoptionSepArg, 0 },
+ { "-mode", ".mode", XrmoptionSepArg, 0 },
+ { "-colors", ".colors", XrmoptionSepArg, 0 },
+ { "-functions", ".lensnum", XrmoptionSepArg, 0 },
+ { "-notranslate", ".notranslate", XrmoptionNoArg, "True" },
+ { "-noscale", ".noscale", XrmoptionNoArg, "True" },
+ { "-norotate", ".norotate", XrmoptionNoArg, "True" },
+ { 0, 0, 0, 0 }
+};
-static DBL
-Gauss_Rand(DBL c, DBL A, DBL S)
+/*Takes the average of two colours, with some nifty bit-shifting*/
+static long blend(long c1, long c2)
{
- DBL y;
-
- y = (DBL) LRAND() / MAXRAND;
- y = A * (1.0 - exp(-y * y * S)) / (1.0 - exp(-S));
- if (NRAND(2))
- return (c + y);
- return (c - y);
+ long R1=(c1 & 0xFF0000) >> 16;
+ long R2=(c2 & 0xFF0000) >> 16;
+ long G1=(c1 & 0x00FF00) >> 8;
+ long G2=(c2 & 0x00FF00) >> 8;
+ long B1=(c1 & 0x0000FF);
+ long B2=(c2 & 0x0000FF);
+
+ return (((R1+R2)/2 << 16) | ((G1+G2)/2 << 8) | ((B1+B2)/2));
}
-static DBL
-Half_Gauss_Rand(DBL c, DBL A, DBL S)
+/*Draw a point on the backbuffer*/
+static void sp(float x, float y, long c)
{
- DBL y;
-
- y = (DBL) LRAND() / MAXRAND;
- y = A * (1.0 - exp(-y * y * S)) / (1.0 - exp(-S));
- return (c + y);
+ x+=16; x*=wt;
+ y=16.5-y; y*=ht;
+ if(x<0 || x>=width || y<0 || y>=height) return;
+ XSetForeground(dpy, gc, c);
+ XDrawPoint(dpy, backbuffer, gc, (int)x, (int)y);
}
-static void
-Random_Simis(FRACTAL * F, SIMI * Cur, int i)
+/*Copy backbuffer to front buffer and clear backbuffer*/
+static void draw(void)
{
- while (i--) {
- Cur->c_x = Gauss_Rand(0.0, .8, 4.0);
- Cur->c_y = Gauss_Rand(0.0, .8, 4.0);
- Cur->r = Gauss_Rand(F->r_mean, F->dr_mean, 3.0);
- Cur->r2 = Half_Gauss_Rand(0.0, F->dr2_mean, 2.0);
- Cur->A = Gauss_Rand(0.0, 360.0, 4.0) * (M_PI / 180.0);
- Cur->A2 = Gauss_Rand(0.0, 360.0, 4.0) * (M_PI / 180.0);
- Cur++;
- }
+ XCopyArea( dpy,
+ backbuffer, w,
+ gc,
+ 0, 0,
+ width, height,
+ 0, 0);
+
+ XSetForeground(dpy, gc, blackColor);
+ XFillRectangle( dpy,
+ backbuffer,
+ gc,
+ 0, 0,
+ width, height);
}
-static void
-free_ifs_buffers(FRACTAL *Fractal)
+typedef struct {
+ float r,s,tx,ty;
+ /*Rotation, Scale, Translation X & Y*/
+ float ra,raa,sa,txa,tya;
+
+ int co;
+} Lens;
+
+
+static void CreateLens(float nr,
+ float ns,
+ float nx,
+ float ny,
+ int nco,
+ Lens *newlens)
{
- if (Fractal->Buffer1 != NULL) {
- (void) free((void *) Fractal->Buffer1);
- Fractal->Buffer1 = (XPoint *) NULL;
- }
- if (Fractal->Buffer2 != NULL) {
- (void) free((void *) Fractal->Buffer2);
- Fractal->Buffer2 = (XPoint *) NULL;
- }
+ newlens->ra=newlens->raa=newlens->sa=newlens->txa=newlens->tya=0;
+ if(!norotate) newlens->r=nr;
+ else newlens->r=0;
+
+ if(!noscale) newlens->s=ns;
+ else newlens->s=0.5;
+
+ if(!notranslate) {
+ newlens->tx=nx;
+ newlens->ty=ny;
+ } else {
+ newlens->tx=nx;
+ newlens->tx=ny;
+ }
+
+ newlens->co=nco;
}
-
-
-static void
-free_ifs(Display *display, FRACTAL *Fractal)
+
+static float stepx(float x, float y, Lens *l)
{
- free_ifs_buffers(Fractal);
- if (Fractal->dbuf != None) {
- XFreePixmap(display, Fractal->dbuf);
- Fractal->dbuf = None;
- }
- if (Fractal->dbuf_gc != None) {
- XFreeGC(display, Fractal->dbuf_gc);
- Fractal->dbuf_gc = None;
- }
+ return l->s*cos(l->r)*x+l->s*sin(l->r)*y+l->tx;
}
-/***************************************************************/
-
-void
-init_ifs(ModeInfo * mi)
+static float stepy(float x, float y, Lens *l)
{
- Display *display = MI_DISPLAY(mi);
- Window window = MI_WINDOW(mi);
- GC gc = MI_GC(mi);
- int i;
- FRACTAL *Fractal;
-
- if (Root == NULL) {
- Root = (FRACTAL *) calloc(
- MI_NUM_SCREENS(mi), sizeof (FRACTAL));
- if (Root == NULL)
- return;
- }
- Fractal = &Root[MI_SCREEN(mi)];
-
- free_ifs_buffers(Fractal);
- i = (NRAND(4)) + 2; /* Number of centers */
- switch (i) {
- case 3:
- Fractal->Depth = MAX_DEPTH_3;
- Fractal->r_mean = .6;
- Fractal->dr_mean = .4;
- Fractal->dr2_mean = .3;
- break;
-
- case 4:
- Fractal->Depth = MAX_DEPTH_4;
- Fractal->r_mean = .5;
- Fractal->dr_mean = .4;
- Fractal->dr2_mean = .3;
- break;
-
- case 5:
- Fractal->Depth = MAX_DEPTH_5;
- Fractal->r_mean = .5;
- Fractal->dr_mean = .4;
- Fractal->dr2_mean = .3;
- break;
-
- default:
- case 2:
- Fractal->Depth = MAX_DEPTH_2;
- Fractal->r_mean = .7;
- Fractal->dr_mean = .3;
- Fractal->dr2_mean = .4;
- break;
- }
- /* (void) fprintf( stderr, "N=%d\n", i ); */
- Fractal->Nb_Simi = i;
- Fractal->Max_Pt = Fractal->Nb_Simi - 1;
- for (i = 0; i <= Fractal->Depth + 2; ++i)
- Fractal->Max_Pt *= Fractal->Nb_Simi;
-
- if ((Fractal->Buffer1 = (XPoint *) calloc(Fractal->Max_Pt,
- sizeof (XPoint))) == NULL) {
- free_ifs(display, Fractal);
- return;
- }
- if ((Fractal->Buffer2 = (XPoint *) calloc(Fractal->Max_Pt,
- sizeof (XPoint))) == NULL) {
- free_ifs(display, Fractal);
- return;
- }
- Fractal->Speed = 6;
- Fractal->Width = MI_WIDTH(mi);
- Fractal->Height = MI_HEIGHT(mi);
- Fractal->Cur_Pt = 0;
- Fractal->Count = 0;
- Fractal->Lx = (Fractal->Width - 1) / 2;
- Fractal->Ly = (Fractal->Height - 1) / 2;
- Fractal->Col = NRAND(MI_NPIXELS(mi) - 1) + 1;
-
- Random_Simis(Fractal, Fractal->Components, 5 * MAX_SIMI);
-
-#ifndef NO_DBUF
- if (Fractal->dbuf != None)
- XFreePixmap(display, Fractal->dbuf);
- Fractal->dbuf = XCreatePixmap(display, window,
- Fractal->Width, Fractal->Height, 1);
- /* Allocation checked */
- if (Fractal->dbuf != None) {
- XGCValues gcv;
-
- gcv.foreground = 0;
- gcv.background = 0;
- gcv.graphics_exposures = False;
- gcv.function = GXcopy;
-
- if (Fractal->dbuf_gc != None)
- XFreeGC(display, Fractal->dbuf_gc);
- if ((Fractal->dbuf_gc = XCreateGC(display, Fractal->dbuf,
- GCForeground | GCBackground | GCGraphicsExposures | GCFunction,
- &gcv)) == None) {
- XFreePixmap(display, Fractal->dbuf);
- Fractal->dbuf = None;
- } else {
- XFillRectangle(display, Fractal->dbuf,
- Fractal->dbuf_gc, 0, 0, Fractal->Width, Fractal->Height);
- XSetBackground(display, gc, MI_BLACK_PIXEL(mi));
- XSetFunction(display, gc, GXcopy);
- }
- }
-#endif
- MI_CLEARWINDOW(mi);
-
- /* don't want any exposure events from XCopyPlane */
- XSetGraphicsExposures(display, gc, False);
-
+ return l->s*sin(l->r)*-x+l->s*cos(l->r)*y+l->ty;
}
-
-/***************************************************************/
-
-/* Should be taken care of already... but just in case */
-#if !defined( __GNUC__ ) && !defined(__cplusplus) && !defined(c_plusplus)
-#undef inline
-#define inline /* */
-#endif
-static inline void
-Transform(SIMI * Simi, F_PT xo, F_PT yo, F_PT * x, F_PT * y)
+static void mutate(Lens *l)
{
- F_PT xx, yy;
-
- xo = xo - Simi->Cx;
- xo = (xo * Simi->R) / UNIT;
- yo = yo - Simi->Cy;
- yo = (yo * Simi->R) / UNIT;
-
- xx = xo - Simi->Cx;
- xx = (xx * Simi->R2) / UNIT;
- yy = -yo - Simi->Cy;
- yy = (yy * Simi->R2) / UNIT;
-
- *x = ((xo * Simi->Ct - yo * Simi->St + xx * Simi->Ct2 - yy * Simi->St2) / UNIT) + Simi->Cx;
- *y = ((xo * Simi->St + yo * Simi->Ct + xx * Simi->St2 + yy * Simi->Ct2) / UNIT) + Simi->Cy;
+ if(!norotate) {
+ l->raa+=myrandom(0.002)-0.001;
+ l->ra+=l->raa;
+ l->r +=l->ra;
+ if(l->ra>0.07 || l->ra<-0.07) l->ra/=1.4;
+ if(l->raa>0.005 || l->raa<-0.005) l->raa/=1.2;
+ }
+ if(!noscale) {
+ l->sa+=myrandom(0.01)-0.005;
+ l->s +=l->sa;
+ if(l->s>0.4) l->sa -=0.004;
+ if(l->s<-0.4) l->sa +=0.004;
+ if(l->sa>0.07 || l->sa<-0.07) l->sa/=1.4;
+ }
+ if(!notranslate) {
+ l->txa+=myrandom(0.004)-0.002;
+ l->tya+=myrandom(0.004)-0.002;
+ l->tx+=l->txa;
+ l->ty+=l->tya;
+ if(l->tx>6) l->txa-=0.004;
+ if(l->ty>6) l->tya-=0.004;
+ if(l->tx<-6) l->txa+=0.004;
+ if(l->ty<-6) l->tya+=0.004;
+ if(l->txa>0.05 || l->txa<-0.05) l->txa/=1.7;
+ if(l->tya>0.05 || l->tya<-0.05) l->tya/=1.7;
+ }
+
+ /*Groovy, colour-shifting functions!*/
+ l->co++;
+ l->co %= ncolours;
}
-/***************************************************************/
+Lens **lenses;
-static void
-Trace(FRACTAL * F, F_PT xo, F_PT yo)
+/* Calls itself <lensnum> times - with results from each lens/function. *
+ * After <length> calls to itself, it stops iterating and draws a point. */
+static void iterate(float x, float y, long curcol, int length)
{
- F_PT x, y, i;
- SIMI *Cur;
-
- Cur = Cur_F->Components;
- for (i = Cur_F->Nb_Simi; i; --i, Cur++) {
- Transform(Cur, xo, yo, &x, &y);
- /* Buf->x = F->Lx + (x * F->Lx / (UNIT * 2)); */
- /* Buf->y = F->Ly - (y * F->Ly / (UNIT * 2)); */
- Buf->x = (UNIT * 2 + x) * F->Lx / (UNIT * 2);
- Buf->y = (UNIT * 2 - y) * F->Ly / (UNIT * 2);
- Buf++;
- Cur_Pt++;
-
- if (F->Depth && ((x - xo) >> 4) && ((y - yo) >> 4)) {
- F->Depth--;
- Trace(F, x, y);
- F->Depth++;
- }
- }
+ int i;
+ if(length == 0) {
+ sp(x,y,curcol);
+ } else {
+ /*iterate(lenses[0].stepx(x,y),lenses[0].stepy(x,y),length-1);
+ iterate(lenses[1].stepx(x,y),lenses[1].stepy(x,y),length-1);
+ iterate(lenses[2].stepx(x,y),lenses[2].stepy(x,y),length-1);*/
+ for(i=0;i<lensnum;i++) {
+ switch(mode) {
+ case 0 : iterate(stepx( x, y, lenses[i]), stepy( x, y, lenses[i]), blend( curcol,colours[(int)lenses[i]->co].pixel ), length-1); break;
+ case 1 : iterate(stepx( x, y, lenses[i]), stepy( x, y, lenses[i]), colours[(int)lenses[i]->co].pixel, length-1); break;
+ case 2 : iterate(stepx( x, y, lenses[i]), stepy( x, y, lenses[i]), curcol, length-1); break;
+ default: exit(0);
+ }
+ }
+ }
+ count++;
}
-static void
-Draw_Fractal(ModeInfo * mi)
+/* Come on and iterate, iterate, iterate and sing... *
+ * Yeah, this function just calls iterate, mutate, *
+ * and then draws everything. */
+static void step(void)
{
- Display *display = MI_DISPLAY(mi);
- Window window = MI_WINDOW(mi);
- GC gc = MI_GC(mi);
- FRACTAL *F = &Root[MI_SCREEN(mi)];
- int i, j;
- F_PT x, y, xo, yo;
- SIMI *Cur, *Simi;
-
- for (Cur = F->Components, i = F->Nb_Simi; i; --i, Cur++) {
- Cur->Cx = DBL_To_F_PT(Cur->c_x);
- Cur->Cy = DBL_To_F_PT(Cur->c_y);
-
- Cur->Ct = DBL_To_F_PT(cos(Cur->A));
- Cur->St = DBL_To_F_PT(sin(Cur->A));
- Cur->Ct2 = DBL_To_F_PT(cos(Cur->A2));
- Cur->St2 = DBL_To_F_PT(sin(Cur->A2));
-
- Cur->R = DBL_To_F_PT(Cur->r);
- Cur->R2 = DBL_To_F_PT(Cur->r2);
- }
-
-
- Cur_Pt = 0;
- Cur_F = F;
- Buf = F->Buffer2;
- for (Cur = F->Components, i = F->Nb_Simi; i; --i, Cur++) {
- xo = Cur->Cx;
- yo = Cur->Cy;
- for (Simi = F->Components, j = F->Nb_Simi; j; --j, Simi++) {
- if (Simi == Cur)
- continue;
- Transform(Simi, xo, yo, &x, &y);
- Trace(F, x, y);
- }
- }
-
- /* Erase previous */
- if (F->Cur_Pt) {
- XSetForeground(display, gc, MI_BLACK_PIXEL(mi));
- if (F->dbuf != None) {
- XSetForeground(display, F->dbuf_gc, 0);
- /* XDrawPoints(display, F->dbuf, F->dbuf_gc, F->Buffer1, F->Cur_Pt,
- CoordModeOrigin); */
- XFillRectangle(display, F->dbuf, F->dbuf_gc, 0, 0,
- F->Width, F->Height);
- } else
- XDrawPoints(display, window, gc, F->Buffer1, F->Cur_Pt, CoordModeOrigin);
- }
- if (MI_NPIXELS(mi) < 2)
- XSetForeground(display, gc, MI_WHITE_PIXEL(mi));
- else
- XSetForeground(display, gc, MI_PIXEL(mi, F->Col % MI_NPIXELS(mi)));
- if (Cur_Pt) {
- if (F->dbuf != None) {
- XSetForeground(display, F->dbuf_gc, 1);
- XDrawPoints(display, F->dbuf, F->dbuf_gc, F->Buffer2, Cur_Pt,
- CoordModeOrigin);
- } else
- XDrawPoints(display, window, gc, F->Buffer2, Cur_Pt, CoordModeOrigin);
- }
- if (F->dbuf != None)
- XCopyPlane(display, F->dbuf, window, gc, 0, 0, F->Width, F->Height, 0, 0, 1);
-
- F->Cur_Pt = Cur_Pt;
- Buf = F->Buffer1;
- F->Buffer1 = F->Buffer2;
- F->Buffer2 = Buf;
+ int i;
+ if(mode == 2) {
+ wcol++;
+ wcol %= ncolours;
+ iterate(0,0,colours[wcol].pixel,length);
+ } else {
+ iterate(0,0,0xFFFFFF,length);
+ }
+
+
+ count=0;
+
+ for(i=0;i<lensnum;i++) {
+ mutate(lenses[i]);
+ }
+ draw();
}
-
-void
-draw_ifs(ModeInfo * mi)
+static void init_ifs(void)
{
- int i;
- DBL u, uu, v, vv, u0, u1, u2, u3;
- SIMI *S, *S1, *S2, *S3, *S4;
- FRACTAL *F;
-
- if (Root == NULL)
- return;
- F = &Root[MI_SCREEN(mi)];
- if (F->Buffer1 == NULL)
- return;
-
- u = (DBL) (F->Count) * (DBL) (F->Speed) / 1000.0;
- uu = u * u;
- v = 1.0 - u;
- vv = v * v;
- u0 = vv * v;
- u1 = 3.0 * vv * u;
- u2 = 3.0 * v * uu;
- u3 = u * uu;
-
- S = F->Components;
- S1 = S + F->Nb_Simi;
- S2 = S1 + F->Nb_Simi;
- S3 = S2 + F->Nb_Simi;
- S4 = S3 + F->Nb_Simi;
-
- for (i = F->Nb_Simi; i; --i, S++, S1++, S2++, S3++, S4++) {
- S->c_x = u0 * S1->c_x + u1 * S2->c_x + u2 * S3->c_x + u3 * S4->c_x;
- S->c_y = u0 * S1->c_y + u1 * S2->c_y + u2 * S3->c_y + u3 * S4->c_y;
- S->r = u0 * S1->r + u1 * S2->r + u2 * S3->r + u3 * S4->r;
- S->r2 = u0 * S1->r2 + u1 * S2->r2 + u2 * S3->r2 + u3 * S4->r2;
- S->A = u0 * S1->A + u1 * S2->A + u2 * S3->A + u3 * S4->A;
- S->A2 = u0 * S1->A2 + u1 * S2->A2 + u2 * S3->A2 + u3 * S4->A2;
- }
-
- MI_IS_DRAWN(mi) = True;
-
- Draw_Fractal(mi);
-
- if (F->Count >= 1000 / F->Speed) {
- S = F->Components;
- S1 = S + F->Nb_Simi;
- S2 = S1 + F->Nb_Simi;
- S3 = S2 + F->Nb_Simi;
- S4 = S3 + F->Nb_Simi;
-
- for (i = F->Nb_Simi; i; --i, S++, S1++, S2++, S3++, S4++) {
- S2->c_x = 2.0 * S4->c_x - S3->c_x;
- S2->c_y = 2.0 * S4->c_y - S3->c_y;
- S2->r = 2.0 * S4->r - S3->r;
- S2->r2 = 2.0 * S4->r2 - S3->r2;
- S2->A = 2.0 * S4->A - S3->A;
- S2->A2 = 2.0 * S4->A2 - S3->A2;
-
- *S1 = *S4;
- }
- Random_Simis(F, F->Components + 3 * F->Nb_Simi, F->Nb_Simi);
-
- Random_Simis(F, F->Components + 4 * F->Nb_Simi, F->Nb_Simi);
-
- F->Count = 0;
- } else
- F->Count++;
-
- F->Col++;
+ Window rw;
+ int i;
+ XWindowAttributes xgwa;
+
+ delay = get_integer_resource("delay", "Delay");
+ length = get_integer_resource("length", "Detail");
+ mode = get_integer_resource("mode", "Mode");
+
+ norotate = get_boolean_resource("norotate", "NoRotate");
+ noscale = get_boolean_resource("noscale", "NoScale");
+ notranslate = get_boolean_resource("notranslate", "NoTranslate");
+
+ lensnum = get_integer_resource("lensnum", "Functions");
+
+ lenses = malloc(sizeof(Lens)*lensnum);
+
+ for(i=0;i<lensnum;i++) {
+ lenses[i]=malloc(sizeof(Lens));
+ }
+
+ /*Thanks go to Dad for teaching me how to allocate memory for struct**s . */
+
+ XGetWindowAttributes (dpy, w, &xgwa);
+ width=xgwa.width;
+ height=xgwa.height;
+
+ /*Initialise all this X shizzle*/
+ blackColor = BlackPixel(dpy, DefaultScreen(dpy));
+ whiteColor = WhitePixel(dpy, DefaultScreen(dpy));
+ rw = RootWindow(dpy, screen_num);
+ screen_num = DefaultScreen(dpy);
+ gc = XCreateGC(dpy, rw, 0, NULL);
+
+ /* Do me some colourmap magic. If we're using blend mode, this is just *
+ * for the nice colours - we're still using true/hicolour. Screw me if *
+ * I'm going to work out how to blend with colourmaps - I'm too young to *
+ * die!! On a sidenote, this is mostly stolen from halftone because I *
+ * don't really know what the hell I'm doing, here. */
+ ncolours = get_integer_resource("colors", "Colors");
+ if(ncolours < lensnum) ncolours=lensnum; /*apparently you're allowed to do this kind of thing...*/
+ colours = (XColor *)calloc(ncolours, sizeof(XColor));
+ make_smooth_colormap ( dpy,
+ xgwa.visual,
+ xgwa.colormap,
+ colours,
+ &ncolours,
+ True, 0, False);
+ /*No, I didn't have a clue what that really did... hopefully I have some colours in an array, now.*/
+ wcol = (int)myrandom(ncolours);
+
+ /*Double buffering - I can't be bothered working out the XDBE thingy*/
+ backbuffer = XCreatePixmap(dpy, w, width, height, XDefaultDepth(dpy, screen_num));
+
+ /*Scaling factor*/
+ wt=width/32;
+ ht=height/24;
+
+ ws=400;
+ hs=400;
+
+ /*Colourmapped colours for the general prettiness*/
+ for(i=0;i<lensnum;i++) {
+ CreateLens( myrandom(1)-0.5,
+ myrandom(1),
+ myrandom(4)-2,
+ myrandom(4)+2,
+ myrandom(ncolours),
+ lenses[i]);
+ }
}
-
-/***************************************************************/
-
void
-release_ifs(ModeInfo * mi)
+screenhack (Display *display, Window window)
{
- if (Root != NULL) {
- int screen;
-
- for (screen = 0; screen < MI_NUM_SCREENS(mi); screen++)
- free_ifs(MI_DISPLAY(mi), &Root[screen]);
- (void) free((void *) Root);
- Root = (FRACTAL *) NULL;
- }
+ dpy = display;
+ w = window;
+
+ init_ifs();
+
+ while (1) {
+ step();
+ screenhack_handle_events(dpy);
+ if (delay) usleep(delay);
+ }
}
-
-#endif /* MODE_ifs */
projects / xscreensaver / blobdiff