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root/radiance/ray/src/meta/cgraph.c
Revision: 1.2
Committed: Sat Nov 15 02:13:36 2003 UTC (20 years, 8 months ago) by schorsch
Content type: text/plain
Branch: MAIN
CVS Tags: rad5R4, rad5R2, rad4R2P2, rad5R0, rad5R1, rad3R7P2, rad3R7P1, rad4R2, rad4R1, rad4R0, rad3R6, rad3R6P1, rad3R8, rad3R9, rad4R2P1, rad5R3, HEAD
Changes since 1.1: +28 -13 lines
Log Message:
Continued ANSIfication, and reduced other compile warnings.

File Contents

# User Rev Content
1 greg 1.1 #ifndef lint
2 schorsch 1.2 static const char RCSid[] = "$Id: cgraph.c,v 1.1 2003/02/22 02:07:26 greg Exp $";
3 greg 1.1 #endif
4     /*
5     * cgraph.c - routines for sending graphs to tty's.
6     *
7     * Greg Ward
8     * 7/7/86
9     */
10    
11    
12     #include <stdio.h>
13    
14 schorsch 1.2 #include "rterror.h"
15     #include "meta.h"
16 greg 1.1 #include "mgvars.h"
17    
18    
19     #define FHUGE 1e10
20    
21     #define MAXSIZE 10000 /* Maximum size in characters of output */
22    
23     extern char *progname; /* argv[0] */
24    
25     static char outcarr[MAXSIZE]; /* character output array */
26    
27     static double xmin = XMAX, xmax = XMIN, /* extrema */
28     ymin = YMAX, ymax = YMIN;
29    
30     static int dwidth, dlength; /* device width and length */
31    
32     static int nplottable; /* number of plottable points */
33    
34 schorsch 1.2 static void climits(void);
35     static void cstretch(int c, double x, double y);
36 greg 1.1
37 schorsch 1.2
38     extern void
39     cgraph( /* do a character graph to stdout */
40     int width,
41     int length
42     )
43 greg 1.1 {
44     if (width * length > MAXSIZE) {
45     fprintf(stderr, "%s: page too big\n", progname);
46     quit(1);
47     }
48     dwidth = width;
49     dlength = length;
50     climits(); /* get min & max values */
51     cplot(); /* do character plot */
52     }
53    
54    
55 schorsch 1.2 static void
56     climits(void) /* get min & max values */
57 greg 1.1 {
58 schorsch 1.2 int i;
59 greg 1.1
60     xmin = gparam[XMIN].flags & DEFINED ?
61     varvalue(gparam[XMIN].name) :
62     FHUGE ;
63     xmax = gparam[XMAX].flags & DEFINED ?
64     varvalue(gparam[XMAX].name) :
65     -FHUGE ;
66     ymin = gparam[YMIN].flags & DEFINED ?
67     varvalue(gparam[YMIN].name) :
68     FHUGE ;
69     ymax = gparam[YMAX].flags & DEFINED ?
70     varvalue(gparam[YMAX].name) :
71     -FHUGE ;
72    
73     nplottable = 0;
74     for (i = 0; i < MAXCUR; i++)
75     mgcurve(i, cstretch);
76    
77     if (nplottable == 0) {
78     fprintf(stderr, "%s: no plottable data\n", progname);
79     quit(1);
80     }
81     printf("XMIN= %f XMAX= %f YMIN= %f YMAX= %f\n",
82     xmin, xmax, ymin, ymax);
83     }
84    
85    
86 schorsch 1.2 void
87     cstretch( /* stretch our boundaries */
88     int c,
89     double x,
90     double y
91     )
92 greg 1.1 {
93     if (gparam[XMIN].flags & DEFINED &&
94     x < xmin)
95     return;
96     if (gparam[XMAX].flags & DEFINED &&
97     x > xmax)
98     return;
99     if (gparam[YMIN].flags & DEFINED &&
100     y < ymin)
101     return;
102     if (gparam[YMAX].flags & DEFINED &&
103     y > ymax)
104     return;
105    
106     if (x < xmin)
107     xmin = x;
108     if (x > xmax)
109     xmax = x;
110     if (y < ymin)
111     ymin = y;
112     if (y > ymax)
113     ymax = y;
114    
115     nplottable++;
116     }
117    
118    
119 schorsch 1.2 extern void
120     cplot(void) /* do character plot */
121 greg 1.1 {
122     int i, j;
123     register char *op;
124    
125     for (op = outcarr+dlength*dwidth; op > outcarr; )
126     *--op = ' ';
127    
128     for (i = 0; i < MAXCUR; i++)
129     mgcurve(i, cpoint);
130    
131     for (i = 0; i < dlength; i++) {
132     for (j = 0; j < dwidth; j++)
133     putchar(*op++);
134     putchar('\n');
135     }
136     }
137    
138    
139 schorsch 1.2 extern void
140     cpoint( /* store a point */
141     int c,
142     double x,
143     double y
144     )
145 greg 1.1 {
146     register int ndx;
147    
148     if (x < xmin || x > xmax || y < ymin || y > ymax)
149     return;
150    
151     ndx = (dlength-1)*(1.0 - (y - ymin)/(ymax - ymin)) + 0.5;
152     ndx = dwidth*ndx + (dwidth-1)*(x-xmin)/(xmax-xmin) + 0.5;
153    
154     if (outcarr[ndx] == ' ')
155     outcarr[ndx] = c+'A';
156     else if (outcarr[ndx] > '1' && outcarr[ndx] < '9')
157     outcarr[ndx]++;
158     else if (outcarr[ndx] == '9')
159     outcarr[ndx] = '*';
160     else if (outcarr[ndx] != '*')
161     outcarr[ndx] = '2';
162     }