french@caip.RUTGERS.EDU (12/27/85)
From: "french robert%d.mfenet"@LLL-MFE.ARPA These files were originally posted a few weeks ago, but due to a terminal problem, some of the lines were mysteriously missing. Hopefully I've got it right this time! -------------------------------------------------------------------------- Well guys, you asked for it, and here it is. There are two parts to the Mandelbrot Set Generator which must be linked together (instructions are at the beginning of the file). I don't have any of the documentation written yet, so you're on your own for a while. I'll upload it when I get it finished. I can't send files over 16K thru the net, so the first section is sent as two files...just JOIN them together. Right now, the program seems to work without any problems, except for an occasional mysterious crash and the problem with closing a window in the middle of picture generation (see comments in MAND1.C). Please send me any comments or suggestions. By the way, on a historical note, the "Mandelbrot Set" as related in Scientific American is a little different from the u-Map implemented here (as discussed in Mandelbrot's "The Fractal Geometry of Nature"). The main difference is the use of Z -> Z 2+C in Scientific American vs. Z -> Z 2-u in the book and this program. The primary effect is the reversal of the picture across the Y axis. Enjoy! Robert French French#Robert%d@LLL-MFE.ARPA ----------------- cut, cut, cut! Take two.... ------------------ /* MAND.C - Command parsing Mandelbrot's Self-Squared Dragon Generator For the Commodore Amiga Version 1.00 Inspired by Scientific American, August/1985 Corrections and improvements suggested by The Fractal Geometry of Nature By Benoit Mandelbrot, W.H. Freeman and Company, 1983 (Used to be Z=Z^2+C, now is Z=Z^2-u, etc.) Copyright (c) 1985, Robert S. French Placed in the Public Domain This program may be distributed free of charge as long as the above notice is retained. Please see the accompanying documentation for more information. Send ANY problems or suggestions to the address in the <I>nformation section. Thank you! Programs should be compiled with: 1> lc -i:include/ -i:include/lattice/ mand.c 1> lc -i:include/ -i:include/lattice/ mand1.c 1> alink :lib/Lstartup.obj+mand.o+mand1.o to mand lib :lib/lc.lib+:lib/amiga.lib */ /*------------------------*/ /* Lots of include files! */ #include <exec/types.h> #include <exec/tasks.h> #include <exec/libraries.h> #include <exec/devices.h> #include <devices/keymap.h> #include <graphics/copper.h> #include <graphics/display.h> #include <graphics/gfxbase.h> #include <graphics/text.h> #include <graphics/view.h> #include <graphics/gels.h> #include <graphics/regions.h> #include <hardware/blit.h> #include <intuition/intuition.h> #include <intuition/intuitionbase.h> #include <stdio.h> /*-------------------*/ /* Misc. definitions */ #define VERSION "1.00" #define EVER ;; #define MAXX 640 /* Maximum X resolution */ #define MAXY 400 /* Maximum Y resolution */ #define MAXMY 100 /* Maximum number of lines at MAXX resolution before going virtual */ #define STARTY 10 /* Starting Y coordinate */ #define F_INTUITION 0x000001 #define F_GRAPHICS 0x000002 #define F_MATH 0x000004 #define F_MATHTRANS 0x000008 #define F_CONSOLE 0x000010 #define F_COLORTAB 0x000020 #define F_SETSTORE 0x000040 /*---------------------------------*/ /* Fast-Floating-Point Definitions */ extern int SPFix(); extern int SPFlt(); extern int SPCmp(); extern int SPTst(); extern int SPAbs(); extern int SPNeg(); extern int SPAdd(); extern int SPSub(); extern int SPMul(); extern int SPDiv(); extern int SPAtan(); extern int SPSin(); extern int SPCos(); extern int SPTan(); extern int SPSincos(); extern int SPSinh(); extern int SPCosh(); extern int SPTanh(); extern int SPExp(); extern int SPLog(); extern int SPPow(); extern int SPSqrt(); extern int SPTieee(); extern int SPFieee(); int MathBase,MathTransBase; /*----------------------*/ /* Graphics definitions */ struct GfxBase *GfxBase; struct IntuitionBase *IntuitionBase; /*----------------------------------*/ /* Miscellaneous Global Definitions */ union kludge { float f; int i; } start_r,end_r,start_i,end_i; int max_x,max_y,max_mem_y; int max_count,color_inc,color_offset,color_set,color_mode,color_div; int color_inset,func_num; int v_starty,max_mem; long v_offset; UWORD *color_table,*v_mand_store; int modified,want_read; FILE *console,*v_fp = NULL,*redir_fp = NULL; int cur_resource = NULL; /*-------------*/ /* Here we go! */ main() { FILE *fopen(); char *fgets(),*stpblk(); float cnvf(); void anal_mand(),wait_close(); int temp,y; char *cmd,inp_buf[80],secchar,*argpos; union kludge center,distance,scale; FILE *fp; max_mem_y = MAXMY; color_table = (UWORD *)malloc(4096*sizeof(UWORD)); if (color_table == NULL) abort("Can't allocate memory for color table"); cur_resource |= F_COLORTAB; v_mand_store = (UWORD *)malloc(MAXX*max_mem_y*sizeof(UWORD)); if (v_mand_store == NULL) abort("Can't allocate memory for set storage"); cur_resource |= F_SETSTORE; MathBase = OpenLibrary("mathffp.library",0); if (MathBase < 1) abort("Can't open mathffp.library"); cur_resource |= F_MATH; MathTransBase = OpenLibrary("mathtrans.library",0); if (MathTransBase < 1) abort("Can't open mathtrans.library"); cur_resource |= F_MATHTRANS; GfxBase = (struct GfxBase *)OpenLibrary("graphics.library",0); if (GfxBase == NULL) abort("Can't open graphics.library"); cur_resource |= F_GRAPHICS; IntuitionBase = (struct IntuitionBase *)OpenLibrary("intuition.library",0); if (IntuitionBase == NULL) abort("Can't open intuition.library"); cur_resource |= F_INTUITION; console = fopen("con:0/10/640/190/Mandelbrot Commands","w+"); if (console == NULL) abort("Can't open console window"); cur_resource |= F_CONSOLE; fprintf(console,"Mandelbrot Self-Squared Dragon Generator - Version %s\n",VERSION); fputs("Copyright (c) 1985, Robert S. French\n",console); fputs("Placed in the public domain.\n",console); fputs("Type '?' for help\n\n",console); max_x = 320; max_y = 200-STARTY; max_mem = max_mem_y * MAXX / max_x; max_count = 60; color_inc = 2; color_offset = 0; color_set = 0; color_mode = 0; color_div = 1; init_colors(); for (EVER) { command: fprintf(console,"Command: "); rewind(console); if (redir_fp) if (Chk_Abort()) { fputs("\nRedirected input aborted!\n",console); fclose(redir_fp); redir_fp = NULL; } else { cmd = fgets(inp_buf,78,redir_fp); if (cmd == NULL) { fputs("End of file encountered.\n",console); fclose(redir_fp); redir_fp = NULL; cmd = fgets(inp_buf,40,console); } else fputs(inp_buf,console); } else cmd = fgets(inp_buf,40,console); *(cmd+strlen(cmd)-1) = '\0'; secchar = toupper(*(cmd+1)); argpos = stpblk(cmd+2); rewind(console); switch (toupper(*cmd)) { case '?': fputs("Available commands are:\n\n",console); fputs("SH - Show current settings Q - Quit\n",console); fputs("SR n / SI n / ER n / EI n - Starting and ending coords\n",console); fputs("MX n / MY n / MC n - Maximum x and y resolution and count\n",console); fprintf(console,"MM n - Maximum number of %d pixel lines in memory\n",MAXX); fputs("XR n / XI n - Displace coord\n",console); fputs("ZR n / ZI n / ZB n - Zoom around center point\n\n",console); fputs("CM n - Graphics mode F n - Change Dragon function\n",console); fputs("CI n - Color increment CD - Color divisor\n",console); fputs("CO n - Color offset CS - Color set\n\n",console); fputs("CT n - Color for points in set\n",console); fputs("D - Display picture G - Generate new picture\n",console); fputs("A - Display and analyze I - Information about author\n\n",console); fputs("SA filename - Save picture L filename - Load picture\n",console); fputs("< filename - Redirect input ; string - Comment\n\n",console); goto command; case 'I': fprintf(console,"Mandelbrot Self-Squared Dragon Generator version %s by Robert S. French\n",VERSION); fputs("Copyright (c) 1985 - Placed in the public domain\n\n",console); fputs("The author may be contacted at:\n\n",console); fputs("USPS: 2740 Frankfort Avenue\n",console); fputs(" Louisville, Ky 40206\n",console); fputs("Phone: (502) 897-5096\n",console); fputs("ARPA: French#Robert%d@LLL-MFE\n\n",console); goto command; case 'S': if (secchar == 'R') { sscanf(argpos,"%f",&start_r.f); start_r.i = SPFieee(start_r.i); if (v_fp) { fclose(v_fp); v_fp = NULL; } goto command; } if (secchar == 'I') { sscanf(argpos,"%f",&start_i.i); start_i.i = SPFieee(start_i.i); if (v_fp) { fclose(v_fp); v_fp = NULL; } goto command; } if (secchar == 'H') { fputs("Current settings:\n",console); fprintf(console,"MaxX=%d, MaxY=%d, SR=%f, ER=%f, SI=%f, EI=%f, F=%d\n", max_x,max_y,cnvf(start_r.i),cnvf(end_r.i),cnvf(start_i.i), cnvf(end_i.i),func_num); fprintf(console,"MaxC=%d, CI=%d, CO=%d, CS=%d, CM=%d, CD=%d, CT=%d\n", max_count,color_inc,color_offset,color_set,color_mode,color_div,color_inset); goto command; } if (secchar == 'A') { fp = fopen(argpos,"w"); if (fp == NULL) { fprintf(console,"Cannot open file '%s'\n",argpos); goto command; } putc((char) 1,fp); fwrite(&start_r,sizeof(start_r),1,fp); fwrite(&end_r,sizeof(end_r),1,fp); fwrite(&start_i,sizeof(start_i),1,fp); fwrite(&end_i,sizeof(end_i),1,fp); fwrite(&max_x,sizeof(max_x),1,fp); fwrite(&max_y,sizeof(max_y),1,fp); want_read = TRUE; for (y=0;y<max_y;y++) { v_pos_line(y); if(fwrite(v_mand_store+(y-v_starty)*max_x, max_x*sizeof(UWORD),1,fp) != 1) { fputs("Error while writing to file\n",console); break; } } fclose(fp); goto command; } ill_cmd(); goto command; case 'E': if (secchar == 'R') { sscanf(argpos,"%f",&end_r.i); end_r.i = SPFieee(end_r.i); if (v_fp) { fclose(v_fp); v_fp = NULL; } goto command; } if (secchar == 'I') { sscanf(argpos,"%f",&end_i.i); end_i.i = SPFieee(end_i.i); if (v_fp) { fclose(v_fp); v_fp = NULL; } goto command; } ill_cmd(); goto command;