| 1 |
#ifndef lint |
| 2 |
static const char RCSid[] = "$Id: mgraph.c,v 1.1 2003/02/22 02:07:26 greg Exp $"; |
| 3 |
#endif |
| 4 |
/* |
| 5 |
* mgraph.c - routines for plotting graphs from variables. |
| 6 |
* |
| 7 |
* 6/23/86 |
| 8 |
* |
| 9 |
* Greg Ward Larson |
| 10 |
*/ |
| 11 |
|
| 12 |
#include <stdio.h> |
| 13 |
#include <string.h> |
| 14 |
|
| 15 |
#include "meta.h" |
| 16 |
#include "mgvars.h" |
| 17 |
#include "mgraph.h" |
| 18 |
|
| 19 |
extern char *progname; /* argv[0] */ |
| 20 |
|
| 21 |
extern double goodstep(), floor(), ceil(), sin(), cos(); |
| 22 |
|
| 23 |
static BOUNDS xbounds, ybounds; /* the boundaries for the graph */ |
| 24 |
|
| 25 |
static double period = DEFPERIOD; /* period for polar plot */ |
| 26 |
|
| 27 |
static double axbegin, axsize; /* the mapped x axis boundaries */ |
| 28 |
static double aybegin, aysize; /* the mapped y axis boundaries */ |
| 29 |
|
| 30 |
static int npltbl[MAXCUR]; /* plottable points per curve */ |
| 31 |
|
| 32 |
static double lastx, lasty; /* last curve postion */ |
| 33 |
static int nplottable; /* number of plottable points */ |
| 34 |
static int nplotted; /* number of plotted points */ |
| 35 |
|
| 36 |
static void getbounds(void); |
| 37 |
static void polaraxis(void); |
| 38 |
static void makeaxis(void); |
| 39 |
static void plotcurves(void); |
| 40 |
static void cartaxis(void); |
| 41 |
static void stretchbounds(int c, double x, double y); |
| 42 |
static void boxstring(int xmin, int ymin, int xmax, int ymax, |
| 43 |
char *s, int d, int width, int color); |
| 44 |
static void drawcircle(int x, int y, int r, int typ, int wid, int col); |
| 45 |
static int rconv(double r); |
| 46 |
static int xconv(double x); |
| 47 |
static int yconv(double y); |
| 48 |
static void csymbol(int c, double u, double v); |
| 49 |
static int cmline(int c, int x, int y); |
| 50 |
static void cmsymbol(int c, int x, int y); |
| 51 |
static int inbounds(double x, double y); |
| 52 |
static void climline(int c, double x, double y, double xout, double yout); |
| 53 |
static void nextpoint(register int c, double x, double y); |
| 54 |
static void cline(int c, double u1, double v1, double u2, double v2); |
| 55 |
|
| 56 |
|
| 57 |
void |
| 58 |
mgraph(void) /* plot the current graph */ |
| 59 |
{ |
| 60 |
/* load the symbol file */ |
| 61 |
if (gparam[SYMFILE].flags & DEFINED) |
| 62 |
minclude(gparam[SYMFILE].v.s); |
| 63 |
/* check for polar plot */ |
| 64 |
if (gparam[PERIOD].flags & DEFINED) |
| 65 |
period = varvalue(gparam[PERIOD].name); |
| 66 |
|
| 67 |
getbounds(); /* get the boundaries */ |
| 68 |
makeaxis(); /* draw the coordinate axis */ |
| 69 |
plotcurves(); /* plot the curves */ |
| 70 |
|
| 71 |
mendpage(); /* advance page */ |
| 72 |
} |
| 73 |
|
| 74 |
|
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void |
| 76 |
getbounds(void) /* compute the boundaries */ |
| 77 |
{ |
| 78 |
int i; |
| 79 |
|
| 80 |
xbounds.min = gparam[XMIN].flags & DEFINED ? |
| 81 |
varvalue(gparam[XMIN].name) - FTINY : |
| 82 |
FHUGE ; |
| 83 |
xbounds.max = gparam[XMAX].flags & DEFINED ? |
| 84 |
varvalue(gparam[XMAX].name) + FTINY : |
| 85 |
-FHUGE ; |
| 86 |
ybounds.min = gparam[YMIN].flags & DEFINED ? |
| 87 |
varvalue(gparam[YMIN].name) - FTINY : |
| 88 |
FHUGE ; |
| 89 |
ybounds.max = gparam[YMAX].flags & DEFINED ? |
| 90 |
varvalue(gparam[YMAX].name) + FTINY : |
| 91 |
-FHUGE ; |
| 92 |
|
| 93 |
nplottable = 0; |
| 94 |
for (i = 0; i < MAXCUR; i++) { |
| 95 |
npltbl[i] = 0; |
| 96 |
mgcurve(i, stretchbounds); |
| 97 |
nplottable += npltbl[i]; |
| 98 |
} |
| 99 |
if (nplottable == 0) { |
| 100 |
fprintf(stderr, "%s: no plottable data\n", progname); |
| 101 |
quit(1); |
| 102 |
} |
| 103 |
|
| 104 |
xbounds.step = gparam[XSTEP].flags & DEFINED ? |
| 105 |
varvalue(gparam[XSTEP].name) : |
| 106 |
period > FTINY ? |
| 107 |
DEFPLSTEP*period : |
| 108 |
goodstep(xbounds.max - xbounds.min) ; |
| 109 |
if (!(gparam[XMIN].flags & DEFINED)) |
| 110 |
xbounds.min = floor(xbounds.min/xbounds.step) * |
| 111 |
xbounds.step; |
| 112 |
if (!(gparam[XMAX].flags & DEFINED)) |
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xbounds.max = ceil(xbounds.max/xbounds.step) * |
| 114 |
xbounds.step; |
| 115 |
ybounds.step = gparam[YSTEP].flags & DEFINED ? |
| 116 |
varvalue(gparam[YSTEP].name) : |
| 117 |
period > FTINY ? |
| 118 |
goodstep((ybounds.max - ybounds.min)*1.75) : |
| 119 |
goodstep(ybounds.max - ybounds.min) ; |
| 120 |
if (!(gparam[YMIN].flags & DEFINED)) |
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ybounds.min = floor(ybounds.min/ybounds.step) * |
| 122 |
ybounds.step; |
| 123 |
if (!(gparam[YMAX].flags & DEFINED)) |
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ybounds.max = ceil(ybounds.max/ybounds.step) * |
| 125 |
ybounds.step; |
| 126 |
if (gparam[XMAP].flags & DEFINED) { |
| 127 |
axbegin = funvalue(gparam[XMAP].name, 1, &xbounds.min); |
| 128 |
axsize = funvalue(gparam[XMAP].name, 1, &xbounds.max); |
| 129 |
axsize -= axbegin; |
| 130 |
} else { |
| 131 |
axbegin = xbounds.min; |
| 132 |
axsize = xbounds.max; |
| 133 |
axsize -= axbegin; |
| 134 |
} |
| 135 |
if (gparam[YMAP].flags & DEFINED) { |
| 136 |
aybegin = funvalue(gparam[YMAP].name, 1, &ybounds.min); |
| 137 |
aysize = funvalue(gparam[YMAP].name, 1, &ybounds.max); |
| 138 |
aysize -= aybegin; |
| 139 |
} else { |
| 140 |
aybegin = ybounds.min; |
| 141 |
aysize = ybounds.max; |
| 142 |
aysize -= aybegin; |
| 143 |
} |
| 144 |
} |
| 145 |
|
| 146 |
|
| 147 |
void |
| 148 |
makeaxis(void) /* draw the coordinate axis */ |
| 149 |
{ |
| 150 |
char stmp[64]; |
| 151 |
|
| 152 |
if (period > FTINY) |
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polaraxis(); |
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else |
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cartaxis(); |
| 156 |
/* x axis label */ |
| 157 |
if (gparam[XLABEL].flags & DEFINED) |
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boxstring(XL_L,XL_D,XL_R,XL_U,gparam[XLABEL].v.s,'r',0,0); |
| 159 |
/* x mapping */ |
| 160 |
if (gparam[XMAP].flags & DEFINED) { |
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mgtoa(stmp, &gparam[XMAP]); |
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boxstring(XM_L,XM_D,XM_R,XM_U,stmp,'r',0,0); |
| 163 |
} |
| 164 |
/* y axis label */ |
| 165 |
if (gparam[YLABEL].flags & DEFINED) |
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boxstring(YL_L,YL_D,YL_R,YL_U,gparam[YLABEL].v.s,'u',0,0); |
| 167 |
/* y mapping */ |
| 168 |
if (gparam[YMAP].flags & DEFINED) { |
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mgtoa(stmp, &gparam[YMAP]); |
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boxstring(YM_L,YM_D,YM_R,YM_U,stmp,'u',0,0); |
| 171 |
} |
| 172 |
/* title */ |
| 173 |
if (gparam[TITLE].flags & DEFINED) |
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boxstring(TI_L,TI_D,TI_R,TI_U,gparam[TITLE].v.s,'r',2,0); |
| 175 |
/* subtitle */ |
| 176 |
if (gparam[SUBTITLE].flags & DEFINED) |
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boxstring(ST_L,ST_D,ST_R,ST_U,gparam[SUBTITLE].v.s,'r',1,0); |
| 178 |
/* legend */ |
| 179 |
if (gparam[LEGEND].flags & DEFINED) |
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mtext(LT_X, LT_Y, gparam[LEGEND].v.s, CPI, 0); |
| 181 |
} |
| 182 |
|
| 183 |
|
| 184 |
void |
| 185 |
polaraxis(void) /* print polar coordinate axis */ |
| 186 |
{ |
| 187 |
int lw, tstyle, t0, t1; |
| 188 |
double d, d1, ybeg; |
| 189 |
char stmp[64], *fmt, *goodformat(); |
| 190 |
/* get tick style */ |
| 191 |
if (gparam[TSTYLE].flags & DEFINED) |
| 192 |
tstyle = varvalue(gparam[TSTYLE].name) + 0.5; |
| 193 |
else |
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tstyle = DEFTSTYLE; |
| 195 |
/* start of numbering */ |
| 196 |
ybeg = ceil(ybounds.min/ybounds.step)*ybounds.step; |
| 197 |
/* theta (x) numbering */ |
| 198 |
fmt = goodformat(xbounds.step); |
| 199 |
for (d = 0.0; d < period-FTINY; d += xbounds.step) { |
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sprintf(stmp, fmt, d); |
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d1 = d*(2*PI)/period; |
| 202 |
t0 = TN_X + TN_R*cos(d1) + .5; |
| 203 |
if (t0 < TN_X) |
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t0 -= strlen(stmp)*CWID; |
| 205 |
mtext(t0,(int)(TN_Y+TN_R*sin(d1)+.5),stmp,CPI,0); |
| 206 |
} |
| 207 |
/* radius (y) numbering */ |
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fmt = goodformat(ybounds.step); |
| 209 |
lw = PL_R+RN_S; |
| 210 |
for (d = ybeg; d <= ybounds.max+FTINY; d += ybounds.step) { |
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t0 = rconv(d); |
| 212 |
if (t0 >= lw+RN_S || t0 <= lw-RN_S) { |
| 213 |
sprintf(stmp, fmt, d); |
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mtext(RN_X+t0-strlen(stmp)*(CWID/2),RN_Y,stmp,CPI,0); |
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lw = t0; |
| 216 |
} |
| 217 |
} |
| 218 |
/* frame */ |
| 219 |
if (gparam[FTHICK].flags & DEFINED) |
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lw = varvalue(gparam[FTHICK].name) + 0.5; |
| 221 |
else |
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lw = DEFFTHICK; |
| 223 |
if (lw-- > 0) { |
| 224 |
drawcircle(PL_X,PL_Y,PL_R,0,lw,0); |
| 225 |
switch (tstyle) { |
| 226 |
case 1: /* outside */ |
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t0 = 0; t1 = TLEN; break; |
| 228 |
case 2: /* inside */ |
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t0 = TLEN; t1 = 0; break; |
| 230 |
case 3: /* accross */ |
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t0 = TLEN/2; t1 = TLEN/2; break; |
| 232 |
default: /* none */ |
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t0 = t1 = 0; break; |
| 234 |
} |
| 235 |
if (t0 + t1) { |
| 236 |
for (d = 0.0; d < 2*PI-FTINY; |
| 237 |
d += xbounds.step*(2*PI)/period) { |
| 238 |
mline((int)(PL_X+(PL_R-t0)*cos(d)+.5), |
| 239 |
(int)(PL_Y+(PL_R-t0)*sin(d)+.5), |
| 240 |
0, lw, 0); |
| 241 |
mdraw((int)(PL_X+(PL_R+t1)*cos(d)+.5), |
| 242 |
(int)(PL_Y+(PL_R+t1)*sin(d)+.5)); |
| 243 |
} |
| 244 |
} |
| 245 |
} |
| 246 |
/* origin */ |
| 247 |
if (gparam[OTHICK].flags & DEFINED) |
| 248 |
lw = varvalue(gparam[OTHICK].name) + 0.5; |
| 249 |
else |
| 250 |
lw = DEFOTHICK; |
| 251 |
if (lw-- > 0) { |
| 252 |
mline(PL_X-PL_R,PL_Y,0,lw,0); |
| 253 |
mdraw(PL_X+PL_R,PL_Y); |
| 254 |
mline(PL_X,PL_Y-PL_R,0,lw,0); |
| 255 |
mdraw(PL_X,PL_Y+PL_R); |
| 256 |
if (tstyle > 0) |
| 257 |
for (d = ybeg; d <= ybounds.max+FTINY; |
| 258 |
d += ybounds.step) { |
| 259 |
t0 = rconv(d); |
| 260 |
mline(PL_X+t0,PL_Y-TLEN/2,0,lw,0); |
| 261 |
mdraw(PL_X+t0,PL_Y+TLEN/2); |
| 262 |
mline(PL_X-TLEN/2,PL_Y+t0,0,lw,0); |
| 263 |
mdraw(PL_X+TLEN/2,PL_Y+t0); |
| 264 |
mline(PL_X-t0,PL_Y-TLEN/2,0,lw,0); |
| 265 |
mdraw(PL_X-t0,PL_Y+TLEN/2); |
| 266 |
mline(PL_X-TLEN/2,PL_Y-t0,0,lw,0); |
| 267 |
mdraw(PL_X+TLEN/2,PL_Y-t0); |
| 268 |
} |
| 269 |
} |
| 270 |
/* grid */ |
| 271 |
if (gparam[GRID].flags & DEFINED) |
| 272 |
lw = varvalue(gparam[GRID].name); |
| 273 |
else |
| 274 |
lw = DEFGRID; |
| 275 |
if (lw-- > 0) { |
| 276 |
for (d = 0.0; d < PI-FTINY; d += xbounds.step*(2*PI)/period) { |
| 277 |
mline((int)(PL_X+PL_R*cos(d)+.5), |
| 278 |
(int)(PL_Y+PL_R*sin(d)+.5),2,0,0); |
| 279 |
mdraw((int)(PL_X-PL_R*cos(d)+.5), |
| 280 |
(int)(PL_Y-PL_R*sin(d)+.5)); |
| 281 |
} |
| 282 |
for (d = ybeg; d <= ybounds.max + FTINY; d += ybounds.step) |
| 283 |
drawcircle(PL_X,PL_Y,rconv(d),2,0,0); |
| 284 |
} |
| 285 |
} |
| 286 |
|
| 287 |
void |
| 288 |
cartaxis(void) /* print Cartesian coordinate axis */ |
| 289 |
{ |
| 290 |
int lw, t0, t1, tstyle; |
| 291 |
double d, xbeg, ybeg; |
| 292 |
char stmp[64], *fmt, *goodformat(); |
| 293 |
register int i; |
| 294 |
/* get tick style */ |
| 295 |
if (gparam[TSTYLE].flags & DEFINED) |
| 296 |
tstyle = varvalue(gparam[TSTYLE].name) + 0.5; |
| 297 |
else |
| 298 |
tstyle = DEFTSTYLE; |
| 299 |
/* start of numbering */ |
| 300 |
xbeg = ceil(xbounds.min/xbounds.step)*xbounds.step; |
| 301 |
ybeg = ceil(ybounds.min/ybounds.step)*ybounds.step; |
| 302 |
|
| 303 |
/* x numbering */ |
| 304 |
fmt = goodformat(xbounds.step); |
| 305 |
lw = 2*AX_L-AX_R; |
| 306 |
for (d = xbeg; |
| 307 |
d <= xbounds.max + FTINY; |
| 308 |
d += xbounds.step) |
| 309 |
if ((i = xconv(d)) >= lw+XN_S || i <= lw-XN_S) { |
| 310 |
sprintf(stmp, fmt, d); |
| 311 |
mtext(i-strlen(stmp)*(CWID/2)+XN_X,XN_Y,stmp,CPI,0); |
| 312 |
lw = i; |
| 313 |
} |
| 314 |
/* y numbering */ |
| 315 |
fmt = goodformat(ybounds.step); |
| 316 |
lw = 2*AX_D-AX_U; |
| 317 |
for (d = ybeg; |
| 318 |
d <= ybounds.max + FTINY; |
| 319 |
d += ybounds.step) |
| 320 |
if ((i = yconv(d)) >= lw+YN_S || i <= lw-YN_S) { |
| 321 |
sprintf(stmp, fmt, d); |
| 322 |
mtext(YN_X-strlen(stmp)*CWID,i+YN_Y,stmp,CPI,0); |
| 323 |
lw = i; |
| 324 |
} |
| 325 |
/* frame */ |
| 326 |
if (gparam[FTHICK].flags & DEFINED) |
| 327 |
lw = varvalue(gparam[FTHICK].name) + 0.5; |
| 328 |
else |
| 329 |
lw = DEFFTHICK; |
| 330 |
if (lw-- > 0) { |
| 331 |
mline(AX_L,AX_D,0,lw,0); |
| 332 |
mdraw(AX_R,AX_D); |
| 333 |
mdraw(AX_R,AX_U); |
| 334 |
mdraw(AX_L,AX_U); |
| 335 |
mdraw(AX_L,AX_D); |
| 336 |
switch (tstyle) { |
| 337 |
case 1: /* outside */ |
| 338 |
t0 = 0; t1 = TLEN; break; |
| 339 |
case 2: /* inside */ |
| 340 |
t0 = TLEN; t1 = 0; break; |
| 341 |
case 3: /* accross */ |
| 342 |
t0 = TLEN/2; t1 = TLEN/2; break; |
| 343 |
default: /* none */ |
| 344 |
t0 = t1 = 0; break; |
| 345 |
} |
| 346 |
if (t0 + t1) { |
| 347 |
for (d = xbeg; |
| 348 |
d <= xbounds.max + FTINY; |
| 349 |
d += xbounds.step) { |
| 350 |
i = xconv(d); |
| 351 |
mline(i,AX_D+t0,0,lw,0); |
| 352 |
mdraw(i,AX_D-t1); |
| 353 |
mline(i,AX_U-t0,0,lw,0); |
| 354 |
mdraw(i,AX_U+t1); |
| 355 |
} |
| 356 |
for (d = ybeg; |
| 357 |
d <= ybounds.max + FTINY; |
| 358 |
d += ybounds.step) { |
| 359 |
i = yconv(d); |
| 360 |
mline(AX_L+t0,i,0,lw,0); |
| 361 |
mdraw(AX_L-t1,i); |
| 362 |
mline(AX_R-t0,i,0,lw,0); |
| 363 |
mdraw(AX_R+t1,i); |
| 364 |
} |
| 365 |
} |
| 366 |
} |
| 367 |
/* origin */ |
| 368 |
if (gparam[OTHICK].flags & DEFINED) |
| 369 |
lw = varvalue(gparam[OTHICK].name) + 0.5; |
| 370 |
else |
| 371 |
lw = DEFOTHICK; |
| 372 |
if (lw-- > 0) { |
| 373 |
i = yconv(0.0); |
| 374 |
if (i >= AX_D && i <= AX_U) { |
| 375 |
mline(AX_L,i,0,lw,0); |
| 376 |
mdraw(AX_R,i); |
| 377 |
if (tstyle > 0) |
| 378 |
for (d = xbeg; d <= xbounds.max+FTINY; |
| 379 |
d += xbounds.step) { |
| 380 |
mline(xconv(d),i+TLEN/2,0,lw,0); |
| 381 |
mdraw(xconv(d),i-TLEN/2); |
| 382 |
} |
| 383 |
} |
| 384 |
i = xconv(0.0); |
| 385 |
if (i >= AX_L && i <= AX_R) { |
| 386 |
mline(i,AX_D,0,lw,0); |
| 387 |
mdraw(i,AX_U); |
| 388 |
if (tstyle > 0) |
| 389 |
for (d = ybeg; d <= ybounds.max+FTINY; |
| 390 |
d += ybounds.step) { |
| 391 |
mline(i+TLEN/2,yconv(d),0,lw,0); |
| 392 |
mdraw(i-TLEN/2,yconv(d)); |
| 393 |
} |
| 394 |
} |
| 395 |
} |
| 396 |
/* grid */ |
| 397 |
if (gparam[GRID].flags & DEFINED) |
| 398 |
lw = varvalue(gparam[GRID].name); |
| 399 |
else |
| 400 |
lw = DEFGRID; |
| 401 |
if (lw-- > 0) { |
| 402 |
for (d = xbeg; |
| 403 |
d <= xbounds.max + FTINY; |
| 404 |
d += xbounds.step) { |
| 405 |
i = xconv(d); |
| 406 |
mline(i,AX_D,2,0,0); |
| 407 |
mdraw(i,AX_U); |
| 408 |
} |
| 409 |
for (d = ybeg; |
| 410 |
d <= ybounds.max + FTINY; |
| 411 |
d += ybounds.step) { |
| 412 |
i = yconv(d); |
| 413 |
mline(AX_L,i,2,0,0); |
| 414 |
mdraw(AX_R,i); |
| 415 |
} |
| 416 |
} |
| 417 |
} |
| 418 |
|
| 419 |
void |
| 420 |
plotcurves(void) /* plot the curves */ |
| 421 |
{ |
| 422 |
int i, j, k; |
| 423 |
|
| 424 |
for (i = 0; i < MAXCUR; i++) { |
| 425 |
nplottable = nplotted = 0; |
| 426 |
lastx = FHUGE; |
| 427 |
if (mgcurve(i, nextpoint) > 0 && |
| 428 |
cparam[i][CLABEL].flags & DEFINED) { |
| 429 |
j = (LE_U-LE_D)/MAXCUR; |
| 430 |
k = LE_U - i*j; |
| 431 |
mtext(LE_L+(LE_R-LE_L)/8,k+j/3, |
| 432 |
cparam[i][CLABEL].v.s,CPI,0); |
| 433 |
cmsymbol(i,LE_L,k); |
| 434 |
if (cmline(i,LE_L,k) == 0) |
| 435 |
mdraw(LE_R-(LE_R-LE_L)/4,k); |
| 436 |
} |
| 437 |
} |
| 438 |
} |
| 439 |
|
| 440 |
void |
| 441 |
nextpoint( /* plot the next point for c */ |
| 442 |
register int c, |
| 443 |
double x, |
| 444 |
double y |
| 445 |
) |
| 446 |
{ |
| 447 |
if (inbounds(x, y)) { |
| 448 |
|
| 449 |
if (!(cparam[c][CNPOINTS].flags & DEFINED) || |
| 450 |
nplotted * npltbl[c] <= nplottable * |
| 451 |
(int)varvalue(cparam[c][CNPOINTS].name) ) { |
| 452 |
csymbol(c, x, y); |
| 453 |
nplotted++; |
| 454 |
} |
| 455 |
nplottable++; |
| 456 |
if (lastx != FHUGE) |
| 457 |
climline(c, x, y, lastx, lasty); |
| 458 |
|
| 459 |
} else if (inbounds(lastx, lasty)) { |
| 460 |
|
| 461 |
climline(c, lastx, lasty, x, y); |
| 462 |
|
| 463 |
} |
| 464 |
lastx = x; |
| 465 |
lasty = y; |
| 466 |
} |
| 467 |
|
| 468 |
|
| 469 |
void |
| 470 |
stretchbounds( /* stretch our boundaries */ |
| 471 |
int c, |
| 472 |
double x, |
| 473 |
double y |
| 474 |
) |
| 475 |
{ |
| 476 |
if (gparam[XMIN].flags & DEFINED && |
| 477 |
x < xbounds.min) |
| 478 |
return; |
| 479 |
if (gparam[XMAX].flags & DEFINED && |
| 480 |
x > xbounds.max) |
| 481 |
return; |
| 482 |
if (gparam[YMIN].flags & DEFINED && |
| 483 |
y < ybounds.min) |
| 484 |
return; |
| 485 |
if (gparam[YMAX].flags & DEFINED && |
| 486 |
y > ybounds.max) |
| 487 |
return; |
| 488 |
|
| 489 |
if (x < xbounds.min) |
| 490 |
xbounds.min = x; |
| 491 |
if (x > xbounds.max) |
| 492 |
xbounds.max = x; |
| 493 |
if (y < ybounds.min) |
| 494 |
ybounds.min = y; |
| 495 |
if (y > ybounds.max) |
| 496 |
ybounds.max = y; |
| 497 |
|
| 498 |
npltbl[c]++; |
| 499 |
} |
| 500 |
|
| 501 |
|
| 502 |
#define exp10(x) exp((x)*2.3025850929940456) |
| 503 |
|
| 504 |
double |
| 505 |
goodstep( /* determine a good step for the interval */ |
| 506 |
double interval |
| 507 |
) |
| 508 |
{ |
| 509 |
static int steps[] = {50, 20, 10, 5, 2, 1}; |
| 510 |
double fact, exp(), log10(), floor(); |
| 511 |
int i; |
| 512 |
|
| 513 |
if (interval <= FTINY) |
| 514 |
return(1.0); |
| 515 |
fact = exp10(floor(log10(interval)))/10; |
| 516 |
interval /= fact * MINDIVS; |
| 517 |
for (i = 0; interval < steps[i]; i++) |
| 518 |
; |
| 519 |
return(steps[i] * fact); |
| 520 |
} |
| 521 |
|
| 522 |
#undef exp10 |
| 523 |
|
| 524 |
|
| 525 |
int |
| 526 |
xconv( /* convert x to meta coords */ |
| 527 |
double x |
| 528 |
) |
| 529 |
{ |
| 530 |
if (gparam[XMAP].flags & DEFINED) |
| 531 |
x = funvalue(gparam[XMAP].name, 1, &x); |
| 532 |
x = (x - axbegin)/axsize; |
| 533 |
return( AX_L + (int)(x*(AX_R-AX_L)) ); |
| 534 |
} |
| 535 |
|
| 536 |
|
| 537 |
int |
| 538 |
yconv( /* convert y to meta coords */ |
| 539 |
double y |
| 540 |
) |
| 541 |
{ |
| 542 |
if (gparam[YMAP].flags & DEFINED) |
| 543 |
y = funvalue(gparam[YMAP].name, 1, &y); |
| 544 |
y = (y - aybegin)/aysize; |
| 545 |
return( AX_D + (int)(y*(AX_U-AX_D)) ); |
| 546 |
} |
| 547 |
|
| 548 |
|
| 549 |
void |
| 550 |
pconv( /* convert theta and radius to meta coords */ |
| 551 |
int *xp, |
| 552 |
int *yp, |
| 553 |
double t, |
| 554 |
double r |
| 555 |
) |
| 556 |
{ |
| 557 |
t *= (2.*PI)/period; |
| 558 |
r = rconv(r); |
| 559 |
*xp = r*cos(t) + (PL_X+.5); |
| 560 |
*yp = r*sin(t) + (PL_Y+.5); |
| 561 |
} |
| 562 |
|
| 563 |
|
| 564 |
int |
| 565 |
rconv( /* convert radius to meta coords */ |
| 566 |
double r |
| 567 |
) |
| 568 |
{ |
| 569 |
if (gparam[YMAP].flags & DEFINED) |
| 570 |
r = funvalue(gparam[YMAP].name, 1, &r); |
| 571 |
|
| 572 |
return((r - aybegin)*PL_R/aysize + .5); |
| 573 |
} |
| 574 |
|
| 575 |
|
| 576 |
void |
| 577 |
boxstring( /* put string in box */ |
| 578 |
int xmin, |
| 579 |
int ymin, |
| 580 |
int xmax, |
| 581 |
int ymax, |
| 582 |
char *s, |
| 583 |
int d, |
| 584 |
int width, |
| 585 |
int color |
| 586 |
) |
| 587 |
{ |
| 588 |
register long size; |
| 589 |
|
| 590 |
if (d == 'u' || d == 'd') { /* up or down */ |
| 591 |
size = strlen(s)*(xmax-xmin)/ASPECT; |
| 592 |
size -= ymax-ymin; |
| 593 |
size /= 2; |
| 594 |
if (size < 0) { /* center */ |
| 595 |
ymin -= size; |
| 596 |
ymax += size; |
| 597 |
} |
| 598 |
} else { /* left or right */ |
| 599 |
size = strlen(s)*(ymax-ymin)/ASPECT; |
| 600 |
size -= xmax-xmin; |
| 601 |
size /= 2; |
| 602 |
if (size < 0) { /* center */ |
| 603 |
xmin -= size; |
| 604 |
xmax += size; |
| 605 |
} |
| 606 |
} |
| 607 |
mvstr(xmin, ymin, xmax, ymax, s, d, width, color); /* print */ |
| 608 |
} |
| 609 |
|
| 610 |
|
| 611 |
char * |
| 612 |
goodformat( /* return a suitable format string for d */ |
| 613 |
double d |
| 614 |
) |
| 615 |
{ |
| 616 |
static char *f[5] = {"%.0f", "%.1f", "%.2f", "%.3f", "%.4f"}; |
| 617 |
double floor(); |
| 618 |
register int i; |
| 619 |
|
| 620 |
if (d < 0.0) |
| 621 |
d = -d; |
| 622 |
if (d > 1e-4 && d < 1e6) |
| 623 |
for (i = 0; i < 5; i++) { |
| 624 |
if (d - floor(d+FTINY) <= FTINY) |
| 625 |
return(f[i]); |
| 626 |
d *= 10.0; |
| 627 |
} |
| 628 |
return("%.1e"); |
| 629 |
} |
| 630 |
|
| 631 |
|
| 632 |
void |
| 633 |
drawcircle( /* draw a circle */ |
| 634 |
int x, |
| 635 |
int y, |
| 636 |
int r, |
| 637 |
int typ, |
| 638 |
int wid, |
| 639 |
int col |
| 640 |
) |
| 641 |
{ |
| 642 |
double d; |
| 643 |
|
| 644 |
if (r <= 0) |
| 645 |
return; |
| 646 |
mline(x+r, y, typ, wid, col); |
| 647 |
for (d = 2*PI*PL_F; d <= 2*PI+FTINY; d += 2*PI*PL_F) |
| 648 |
mdraw((int)(x+r*cos(d)+.5), (int)(y+r*sin(d)+.5)); |
| 649 |
} |
| 650 |
|
| 651 |
|
| 652 |
void |
| 653 |
climline( /* print line from/to out of bounds */ |
| 654 |
int c, |
| 655 |
double x, |
| 656 |
double y, |
| 657 |
double xout, |
| 658 |
double yout |
| 659 |
) |
| 660 |
{ |
| 661 |
for ( ; ; ) |
| 662 |
if (xout < xbounds.min) { |
| 663 |
yout = y + (yout - y)*(xbounds.min - x)/(xout - x); |
| 664 |
xout = xbounds.min; |
| 665 |
} else if (yout < ybounds.min) { |
| 666 |
xout = x + (xout - x)*(ybounds.min - y)/(yout - y); |
| 667 |
yout = ybounds.min; |
| 668 |
} else if (xout > xbounds.max) { |
| 669 |
yout = y + (yout - y)*(xbounds.max - x)/(xout - x); |
| 670 |
xout = xbounds.max; |
| 671 |
} else if (yout > ybounds.max) { |
| 672 |
xout = x + (xout - x)*(ybounds.max - y)/(yout - y); |
| 673 |
yout = ybounds.max; |
| 674 |
} else { |
| 675 |
cline(c, x, y, xout, yout); |
| 676 |
break; |
| 677 |
} |
| 678 |
} |
| 679 |
|
| 680 |
|
| 681 |
void |
| 682 |
cline( /* print a curve line */ |
| 683 |
int c, |
| 684 |
double u1, |
| 685 |
double v1, |
| 686 |
double u2, |
| 687 |
double v2 |
| 688 |
) |
| 689 |
{ |
| 690 |
int x, y; |
| 691 |
double ustep, vstep; |
| 692 |
|
| 693 |
if (period > FTINY) { /* polar */ |
| 694 |
if (u1 > u2) { |
| 695 |
ustep = u1; u1 = u2; u2 = ustep; |
| 696 |
vstep = v1; v1 = v2; v2 = vstep; |
| 697 |
} |
| 698 |
pconv(&x, &y, u1, v1); |
| 699 |
if (cmline(c, x, y) < 0) |
| 700 |
return; |
| 701 |
ustep = period*PL_F; |
| 702 |
if (u2-u1 > ustep) { |
| 703 |
vstep = ustep*(v2-v1)/(u2-u1); |
| 704 |
while ((u1 += ustep) < u2) { |
| 705 |
v1 += vstep; |
| 706 |
pconv(&x, &y, u1, v1); |
| 707 |
mdraw(x, y); |
| 708 |
} |
| 709 |
} |
| 710 |
pconv(&x, &y, u2, v2); |
| 711 |
mdraw(x, y); |
| 712 |
} else if (cmline(c, xconv(u1), yconv(v1)) == 0) |
| 713 |
mdraw(xconv(u2), yconv(v2)); |
| 714 |
} |
| 715 |
|
| 716 |
|
| 717 |
int |
| 718 |
cmline( /* start curve line in meta coords */ |
| 719 |
int c, |
| 720 |
int x, |
| 721 |
int y |
| 722 |
) |
| 723 |
{ |
| 724 |
int lw, lt, col; |
| 725 |
register VARIABLE *cv; |
| 726 |
|
| 727 |
cv = cparam[c]; |
| 728 |
if (cv[CLINTYPE].flags & DEFINED) |
| 729 |
lt = varvalue(cv[CLINTYPE].name); |
| 730 |
else |
| 731 |
lt = DEFLINTYPE; |
| 732 |
if (lt-- <= 0) |
| 733 |
return(-1); |
| 734 |
if (cv[CTHICK].flags & DEFINED) |
| 735 |
lw = varvalue(cv[CTHICK].name); |
| 736 |
else |
| 737 |
lw = DEFTHICK; |
| 738 |
if (lw-- <= 0) |
| 739 |
return(-1); |
| 740 |
if (cv[CCOLOR].flags & DEFINED) |
| 741 |
col = varvalue(cv[CCOLOR].name); |
| 742 |
else |
| 743 |
col = DEFCOLOR; |
| 744 |
if (col-- <= 0) |
| 745 |
return(-1); |
| 746 |
mline(x, y, lt, lw, col); |
| 747 |
return(0); |
| 748 |
} |
| 749 |
|
| 750 |
|
| 751 |
void |
| 752 |
csymbol( /* plot curve symbol */ |
| 753 |
int c, |
| 754 |
double u, |
| 755 |
double v |
| 756 |
) |
| 757 |
{ |
| 758 |
int x, y; |
| 759 |
|
| 760 |
if (period > FTINY) { |
| 761 |
pconv(&x, &y, u, v); |
| 762 |
cmsymbol(c, x, y); |
| 763 |
} else |
| 764 |
cmsymbol(c, xconv(u), yconv(v)); |
| 765 |
} |
| 766 |
|
| 767 |
|
| 768 |
void |
| 769 |
cmsymbol( /* print curve symbol in meta coords */ |
| 770 |
int c, |
| 771 |
int x, |
| 772 |
int y |
| 773 |
) |
| 774 |
{ |
| 775 |
int col, ss; |
| 776 |
register VARIABLE *cv; |
| 777 |
|
| 778 |
cv = cparam[c]; |
| 779 |
if (!(cv[CSYMTYPE].flags & DEFINED)) |
| 780 |
return; |
| 781 |
if (cv[CSYMSIZE].flags & DEFINED) |
| 782 |
ss = varvalue(cv[CSYMSIZE].name); |
| 783 |
else |
| 784 |
ss = DEFSYMSIZE; |
| 785 |
if (ss <= 0) |
| 786 |
return; |
| 787 |
if (cv[CCOLOR].flags & DEFINED) |
| 788 |
col = varvalue(cv[CCOLOR].name); |
| 789 |
else |
| 790 |
col = DEFCOLOR; |
| 791 |
if (col-- <= 0) |
| 792 |
return; |
| 793 |
msegment(x-ss,y-ss,x+ss,y+ss, |
| 794 |
cv[CSYMTYPE].v.s,'r',0,col); |
| 795 |
} |
| 796 |
|
| 797 |
|
| 798 |
int |
| 799 |
inbounds( /* determine if x and y are within gbounds */ |
| 800 |
double x, |
| 801 |
double y |
| 802 |
) |
| 803 |
{ |
| 804 |
if (x < xbounds.min || x > xbounds.max) |
| 805 |
return(0); |
| 806 |
if (y < ybounds.min || y > ybounds.max) |
| 807 |
return(0); |
| 808 |
return(1); |
| 809 |
} |
