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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

# Content
1 #ifndef lint
2 static const char RCSid[] = "$Id: cgraph.c,v 1.1 2003/02/22 02:07:26 greg Exp $";
3 #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 #include "rterror.h"
15 #include "meta.h"
16 #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 static void climits(void);
35 static void cstretch(int c, double x, double y);
36
37
38 extern void
39 cgraph( /* do a character graph to stdout */
40 int width,
41 int length
42 )
43 {
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 static void
56 climits(void) /* get min & max values */
57 {
58 int i;
59
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 void
87 cstretch( /* stretch our boundaries */
88 int c,
89 double x,
90 double y
91 )
92 {
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 extern void
120 cplot(void) /* do character plot */
121 {
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 extern void
140 cpoint( /* store a point */
141 int c,
142 double x,
143 double y
144 )
145 {
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 }