C/C++ Interactive Guide/c-cplusplus-interactive-guide.iso/c_ref/csource5/334_01/fig.trm

Text File | 1991-02-06 | 5.1 KB | 212 lines

/* GNUPLOT - fig.trm */
/*
 * Copyright (C) 1990
 *
 * Permission to use, copy, and distribute this software and its
 * documentation for any purpose with or 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.
 *
 * Permission to modify the software is granted, but not the right to
 * distribute the modified code.  Modifications are to be distributed
 * as patches to released version.
 *
 * This software  is provided "as is" without express or implied warranty.
 *
 * This file is included by ../term.c.
 *
 * This terminal driver supports:
 *  Fig graphics language
 *
 * AUTHORS
 *  Micah Beck, David Kotz
 *
 * send your comments or suggestions to (pixar![e-mail]).
 *
 */

/*
 * Original for Fig code output by Micah Beck, 1989
 * Department of Computer Science, Cornell University
 * Updated by David Kotz for gnuplot 2.0
 */
#include "object.h"            /* from the TransFig distribution */

#ifndef FIG_RES
/* Must be 80 for the Fig editor, but may be increased if used
 * only by TransFig filters.
 * Represents resolution per inch.
 */
#define FIG_RES        80
#endif

#define FIG_COORD_SYS    2

#define FIG_MAGIC    "#FIG 1.4-TFX"
#define FIG_HTIC    (5*FIG_RES/80)
#define FIG_VTIC    (5*FIG_RES/80)
#define FIG_HCHAR    (6*FIG_RES/80)
#define FIG_VCHAR    (12*FIG_RES/80)

#define FIG_ARROW_WIDTH FIG_HTIC
#define FIG_ARROW_HEIGHT FIG_HTIC

static long FIG_xbase = FIG_RES/2;
static long FIG_ybase = FIG_RES/2;

static long FIG_posx;
static long FIG_posy;
/* 5 inches wide by 3 inches high */
#define FIG_XMAX (5 * FIG_RES)
#define FIG_YMAX (3 * FIG_RES)

static int FIG_type;        /* negative types use real lines */
static float FIG_spacing;    /* length of dash or dot spacing */
static int FIG_justify;        /* Fig justification T_*_JUSTIFIED */
static float FIG_angle;        /* Fig text angle 0=horiz, Pi/2=vert */

#define FIG_POINT_TYPES POINT_TYPES /* we use the same points */

FIG_init()
{
    FIG_posx = FIG_posy = 0;
    FIG_linetype(-1);
    FIG_justify_text(LEFT);
    FIG_text_angle(0);

    fprintf(outfile, "%s\n", FIG_MAGIC);
    fprintf(outfile, "%d %d\n", FIG_RES, FIG_COORD_SYS);
}


FIG_graphics()
{
    FIG_posx = FIG_posy = 0;
    /* there is no way to have separate pictures in a FIG file */
}


FIG_text()
{
    /* there is no way to have separate pictures in a FIG file */
}


/* Line types for FIG work like this:
 *  -2 : solid (border)
 *  -1 : dashed 4 (axes)
 *   0 : solid (first curve)
 *   1 : dotted 3
 *   2 : dashed 3
 *   3 : dotted 6
 *   4 : dashed 6
 *   ... ...
 */

FIG_linetype(linetype)
    int linetype;            /* expect linetype >= -2 */
{
    switch (linetype) {
       case 0:
       case -2: {
          FIG_type = 0;    /* solid line */
          FIG_spacing = 0.0;
          break;
       }
       case -1: {
          FIG_type = 1;    /* dashed */
          FIG_spacing = 4.0; /* dash length */
          break;
       }
       default: {
          linetype = abs(linetype); /* shouldn't be negative anyway */
          /* now linetype >= 1 */
          FIG_type = linetype % 2 + 1; /* dotted, dashed, ... */
          FIG_spacing = (linetype+1) / 2 * 3;
          break;
       }
    }
}

FIG_move(x,y)
    unsigned int x,y;
{
    FIG_posx = x;
    FIG_posy = y;
}

FIG_vector(ux,uy)
    unsigned int ux,uy;
{
        int x=ux, y=uy;

      fprintf(outfile, "%d %d %d %d %d %d %d %d %6.3f  %d %d\n",
         O_POLYLINE, T_POLYLINE,
         FIG_type, 1, DEFAULT, DEFAULT, DEFAULT, DEFAULT, FIG_spacing,
         0, 0);
      fprintf(outfile, "%d %d %d %d 9999 9999\n",
         FIG_posx, FIG_YMAX-FIG_posy, x, FIG_YMAX-y);

    FIG_posx = x;
        FIG_posy = y;
}

FIG_arrow(sx, sy, ex, ey)
    int sx, sy;    /* start coord */
    int ex, ey;    /* end coord */
{
      fprintf(outfile, "%d %d %d %d %d %d %d %d %6.3f  %d %d\n",
         O_POLYLINE, T_POLYLINE,
         FIG_type, 1, DEFAULT, DEFAULT, DEFAULT, DEFAULT, FIG_spacing,
         1, 0);
    /* arrow line */
      fprintf(outfile, "%d %d %.3f %.3f %.3f\n",
         0, 0, 1.0, (float)FIG_ARROW_WIDTH, (float)FIG_ARROW_HEIGHT);
      fprintf(outfile, "%d %d %d %d 9999 9999\n",
         sx, FIG_YMAX-sy, ex, FIG_YMAX-ey);

    FIG_posx = ex;
        FIG_posy = ey;
}

FIG_put_text(x, y, str)
    int x, y;
    char *str;
{
    y = y - FIG_VCHAR/2;        /* assuming vertical center justified */

    fprintf(outfile, "%d %d %d %d %d %d %d %6.3f %d %d %d %d %d %s\01\n",
          O_TEXT, FIG_justify,
          ROMAN_FONT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, FIG_angle,
          DEFAULT, 16, 8*strlen(str), x, FIG_YMAX-y, str);
}

int FIG_justify_text(mode)
    enum JUSTIFY mode;
{
    switch(mode) {
       case LEFT: FIG_justify = T_LEFT_JUSTIFIED; break;
       case CENTRE: FIG_justify = T_CENTER_JUSTIFIED; break;
       case RIGHT: FIG_justify = T_RIGHT_JUSTIFIED; break;
       /* shouldn't happen */
       default: FIG_justify = T_LEFT_JUSTIFIED; break;
    }
    return (TRUE);
}

int FIG_text_angle(angle)
    int angle;
{
    if (angle)
     FIG_angle = Pi / 2.0;    /* vertical is pi/2 radians */
    else
     FIG_angle = 0.0;        /* horizontal */
    return (TRUE);
}

FIG_reset()
{
    FIG_posx = FIG_posy = 0;
}