| 1 |
/* |
| 2 |
* $Id: qplot.c,v 1.1 2003/11/18 14:22:19 root Exp $ |
| 3 |
*/ |
| 4 |
|
| 5 |
#include <stdio.h> |
| 6 |
#include <stdlib.h> |
| 7 |
#include <math.h> |
| 8 |
#include <signal.h> |
| 9 |
#include "grxlib.h" |
| 10 |
|
| 11 |
#define Real float |
| 12 |
|
| 13 |
#ifndef GRX_SCALE |
| 14 |
# define GRX_SCALE 10000 |
| 15 |
#endif |
| 16 |
|
| 17 |
#define DEFAULT_DATA_FILE "data" |
| 18 |
|
| 19 |
static void |
| 20 |
axis_round(Real * min, Real * max, Real * grid_spacing) |
| 21 |
{ |
| 22 |
int logspace; |
| 23 |
|
| 24 |
logspace = (int)(log10((*max - *min) / 10.0) + 0.5); |
| 25 |
*grid_spacing = pow(10, (double)logspace); |
| 26 |
*min = (Real) ((int)(*min / (*grid_spacing))) * (*grid_spacing); |
| 27 |
*max = (Real) ((int)(*max / (*grid_spacing)) + 1) * (*grid_spacing); |
| 28 |
} |
| 29 |
|
| 30 |
static int |
| 31 |
nice_end(int junk) |
| 32 |
{ |
| 33 |
CloseGraphics(); |
| 34 |
putchar('\n'); |
| 35 |
exit(EXIT_SUCCESS); |
| 36 |
return 0; |
| 37 |
} |
| 38 |
|
| 39 |
int |
| 40 |
main(int argc, char **argv) |
| 41 |
{ |
| 42 |
char *file = NULL; |
| 43 |
int Do_Start = 1, tmp; |
| 44 |
int m, p, i, j, n, nchars, theight, twidth, xclick, yclick; |
| 45 |
int downx = 1000, downy = 1000, upx, upy; |
| 46 |
long id, winclick; |
| 47 |
Real xmax, xmin, ymax, ymin, xdiff, ydiff, xgrid_spacing, |
| 48 |
ygrid_spacing; |
| 49 |
Real *x, *y, *nls; |
| 50 |
LineFunction linetype = StartLine; |
| 51 |
char axis[100], line[256]; |
| 52 |
FILE *fd; |
| 53 |
|
| 54 |
x = (Real *)malloc(1000000 * sizeof(Real)); |
| 55 |
y = (Real *)malloc(1000000 * sizeof(Real)); |
| 56 |
nls = (Real *)malloc(1000 * sizeof(Real)); |
| 57 |
if (x == NULL || y == NULL || nls == NULL) { |
| 58 |
fprintf(stderr, "Can't allocate initial memory\n"); |
| 59 |
exit(1); |
| 60 |
} |
| 61 |
|
| 62 |
ymax = xmax = -HUGE_VAL; |
| 63 |
ymin = xmin = HUGE_VAL; |
| 64 |
|
| 65 |
for (i = 1; i < argc; i++) { |
| 66 |
if (*argv[i] == '-') { |
| 67 |
if (!strcmp(argv[i], "-nl")) |
| 68 |
linetype = StartPoint; |
| 69 |
else if (argv[i][1] == '\0') /* use stdin */ |
| 70 |
file = argv[i]; |
| 71 |
else { |
| 72 |
|
| 73 |
fprintf(stderr, "Usage:\n\t %s [options] [file]\n\n", argv[0]); |
| 74 |
fprintf(stderr, |
| 75 |
"where options include:\n" |
| 76 |
" -pt plot with points instead of lines\n\n"); |
| 77 |
|
| 78 |
fprintf(stderr, |
| 79 |
"file name `-' specifies stdin\n" |
| 80 |
"if no file name is specified, " |
| 81 |
"the default is \"%s\"\n\n", DEFAULT_DATA_FILE); |
| 82 |
|
| 83 |
return EXIT_FAILURE; |
| 84 |
} |
| 85 |
} else |
| 86 |
file = argv[i]; |
| 87 |
} |
| 88 |
|
| 89 |
if (file && !strcmp(file, "-")) { |
| 90 |
fd = stdin; |
| 91 |
file = "stdin"; |
| 92 |
} else { |
| 93 |
if (file == NULL) |
| 94 |
file = DEFAULT_DATA_FILE; |
| 95 |
|
| 96 |
if ((fd = fopen(file, "r")) == NULL) { |
| 97 |
fprintf(stderr, "%s: can't open file \"%s\"\n", argv[0], file); |
| 98 |
return EXIT_FAILURE; |
| 99 |
} |
| 100 |
} |
| 101 |
m = 0; |
| 102 |
p = 0; |
| 103 |
while (fgets(line, sizeof(line), fd) != NULL) { |
| 104 |
if (sscanf(line, "%f %f", &x[m], &y[m]) == 2) { |
| 105 |
if (x[m] > xmax) |
| 106 |
xmax = x[m]; |
| 107 |
else if (x[m] < xmin) |
| 108 |
xmin = x[m]; |
| 109 |
if (y[m] > ymax) |
| 110 |
ymax = y[m]; |
| 111 |
else if (y[m] < ymin) |
| 112 |
ymin = y[m]; |
| 113 |
m++; |
| 114 |
} else { |
| 115 |
nls[p] = m; |
| 116 |
p++; |
| 117 |
} |
| 118 |
} |
| 119 |
nls[p++] = m; |
| 120 |
|
| 121 |
if (m == 0) |
| 122 |
return; |
| 123 |
|
| 124 |
signal(SIGTERM, nice_end); |
| 125 |
signal(SIGSTOP, nice_end); |
| 126 |
signal(SIGTSTP, nice_end); |
| 127 |
signal(SIGINT, nice_end); |
| 128 |
signal(SIGQUIT, nice_end); |
| 129 |
if (!InitializeGraphics(1)) |
| 130 |
return EXIT_FAILURE; |
| 131 |
|
| 132 |
n = 1; |
| 133 |
do { |
| 134 |
axis_round(&xmin, &xmax, &xgrid_spacing); |
| 135 |
axis_round(&ymin, &ymax, &ygrid_spacing); |
| 136 |
|
| 137 |
id = CreateWin(0, 0, GRX_SCALE, GRX_SCALE); |
| 138 |
if (id == 0) { |
| 139 |
fprintf(stderr, "Help id = 0\n"); |
| 140 |
return EXIT_FAILURE; |
| 141 |
} |
| 142 |
/* Fill the window in black for real eye-catching graphics! */ |
| 143 |
ForeColor(0); |
| 144 |
StartFill(id); |
| 145 |
FillArea(0, 0, GRX_SCALE, GRX_SCALE); |
| 146 |
Done(); |
| 147 |
|
| 148 |
/* draw outline box in white */ |
| 149 |
ForeColor(7); |
| 150 |
|
| 151 |
/* Draw outline box */ |
| 152 |
StartLine(id); |
| 153 |
Extend(1000, 1000); |
| 154 |
Extend(1000, 9000); |
| 155 |
Extend(9000, 9000); |
| 156 |
Extend(9000, 1000); |
| 157 |
Extend(1000, 1000); |
| 158 |
Done(); |
| 159 |
|
| 160 |
/* Draw the data - either lines or dots */ |
| 161 |
xdiff = 8000 / (xmax - xmin); |
| 162 |
ydiff = 8000 / (ymax - ymin); |
| 163 |
|
| 164 |
for (i = j = 0; j < p; j++) { |
| 165 |
int n = 0; |
| 166 |
|
| 167 |
ForeColor(j % 6 + 1); |
| 168 |
while (((x[i] < xmin) || (x[i] > xmax) || |
| 169 |
(y[i] < ymin) || (y[i] > ymax)) && (i < nls[j])) |
| 170 |
i++; |
| 171 |
|
| 172 |
while (i < nls[j]) { |
| 173 |
if (n == 0) |
| 174 |
linetype(id); |
| 175 |
Extend(1000 + (x[i] - xmin) * xdiff, |
| 176 |
9000 - (y[i] - ymin) * ydiff); |
| 177 |
n++; |
| 178 |
if (n > 450) { |
| 179 |
Done(); |
| 180 |
n = 0; |
| 181 |
continue; |
| 182 |
} |
| 183 |
i++; |
| 184 |
while ((i < nls[j]) && |
| 185 |
((x[i] < xmin) || (x[i] > xmax) || |
| 186 |
(y[i] < ymin) || (y[i] > ymax))) |
| 187 |
i++; |
| 188 |
} |
| 189 |
if (n > 0) |
| 190 |
Done(); |
| 191 |
} |
| 192 |
|
| 193 |
/* Do axis labels in black */ |
| 194 |
ForeColor(7); |
| 195 |
QueryWin(id, &twidth, &theight); |
| 196 |
PlaceText(id, GRX_SCALE / 2, 0, HCENTER_TEXT | TOP_TEXT, file); |
| 197 |
PlaceText(id, GRX_SCALE / 2, GRX_SCALE, HCENTER_TEXT | BOTTOM_TEXT, |
| 198 |
"X"); |
| 199 |
PlaceText(id, 0, GRX_SCALE / 2, LEFT_TEXT | VCENTER_TEXT, "Y"); |
| 200 |
sprintf(axis, "%f", ymax); |
| 201 |
nchars = 1000 / twidth; |
| 202 |
axis[nchars] = 0; |
| 203 |
PlaceText(id, GRX_SCALE / 10, GRX_SCALE / 10, |
| 204 |
RIGHT_TEXT | TOP_TEXT, axis); |
| 205 |
sprintf(axis, "%f", ymin); |
| 206 |
axis[nchars] = 0; |
| 207 |
PlaceText(id, GRX_SCALE / 10, 9 * GRX_SCALE / 10, |
| 208 |
RIGHT_TEXT | BOTTOM_TEXT, axis); |
| 209 |
sprintf(axis, "%f", xmax); |
| 210 |
PlaceText(id, 9 * GRX_SCALE / 10, 9 * GRX_SCALE / 10, |
| 211 |
HCENTER_TEXT | TOP_TEXT, axis); |
| 212 |
sprintf(axis, "%f", xmin); |
| 213 |
PlaceText(id, GRX_SCALE / 10, 9 * GRX_SCALE / 10, |
| 214 |
HCENTER_TEXT | TOP_TEXT, axis); |
| 215 |
fflush(stdout); |
| 216 |
|
| 217 |
do { |
| 218 |
n = WaitForCarriageReturn(&winclick, &xclick, &yclick); |
| 219 |
switch (n) { |
| 220 |
case 1: |
| 221 |
downx = xclick; |
| 222 |
downy = yclick; |
| 223 |
break; |
| 224 |
case 2: |
| 225 |
upx = xclick; |
| 226 |
upy = yclick; |
| 227 |
if (upx < downx) { |
| 228 |
tmp = downx; |
| 229 |
downx = upx; |
| 230 |
upx = tmp; |
| 231 |
} |
| 232 |
if (upy < downy) { |
| 233 |
tmp = downy; |
| 234 |
downy = upy; |
| 235 |
upy = tmp; |
| 236 |
} |
| 237 |
xmin = (xmax - xmin) * (downx - 1000) / (8000) + xmin; |
| 238 |
xmax = (xmax - xmin) * (upx - 1000) / (8000) + xmin; |
| 239 |
ymax = ymax - (ymax - ymin) * (downy - 1000) / (8000); |
| 240 |
ymin = ymax - (ymax - ymin) * (upy - 1000) / (8000); |
| 241 |
break; |
| 242 |
} |
| 243 |
} while (n && (n != 2)); |
| 244 |
} while (n); |
| 245 |
nice_end(EXIT_SUCCESS); |
| 246 |
return EXIT_SUCCESS; |
| 247 |
} |
| 248 |
|
| 249 |
/*----------------------- end-of-file (C source) -----------------------*/ |
