Annotation of OpenXM_contrib/gnuplot/plot2d.c, Revision 1.1.1.1
1.1 maekawa 1: #ifndef lint
2: static char *RCSid = "$Id: plot2d.c,v 1.53 1998/06/18 14:55:14 ddenholm Exp $";
3: #endif
4:
5: /* GNUPLOT - plot2d.c */
6:
7: /*[
8: * Copyright 1986 - 1993, 1998 Thomas Williams, Colin Kelley
9: *
10: * Permission to use, copy, and distribute this software and its
11: * documentation for any purpose with or without fee is hereby granted,
12: * provided that the above copyright notice appear in all copies and
13: * that both that copyright notice and this permission notice appear
14: * in supporting documentation.
15: *
16: * Permission to modify the software is granted, but not the right to
17: * distribute the complete modified source code. Modifications are to
18: * be distributed as patches to the released version. Permission to
19: * distribute binaries produced by compiling modified sources is granted,
20: * provided you
21: * 1. distribute the corresponding source modifications from the
22: * released version in the form of a patch file along with the binaries,
23: * 2. add special version identification to distinguish your version
24: * in addition to the base release version number,
25: * 3. provide your name and address as the primary contact for the
26: * support of your modified version, and
27: * 4. retain our contact information in regard to use of the base
28: * software.
29: * Permission to distribute the released version of the source code along
30: * with corresponding source modifications in the form of a patch file is
31: * granted with same provisions 2 through 4 for binary distributions.
32: *
33: * This software is provided "as is" without express or implied warranty
34: * to the extent permitted by applicable law.
35: ]*/
36:
37: #include "plot.h"
38: #include "setshow.h"
39: #include "fit.h"
40: #include "binary.h"
41:
42: #ifndef _Windows
43: # include "help.h"
44: #endif
45:
46: #ifndef STDOUT
47: #define STDOUT 1
48: #endif
49:
50: /* static prototypes */
51:
52: void plotrequest __PROTO((void));
53: void plot3drequest __PROTO((void));
54: void define __PROTO((void));
55: static void get_data __PROTO((struct curve_points * this_plot));
56: static void store2d_point __PROTO((struct curve_points * this_plot, int i, double x, double y, double xlow, double xhigh, double ylow, double yhigh, double width));
57: static void print_table __PROTO((struct curve_points * first_plot, int plot_num));
58: static void eval_plots __PROTO((void));
59: static void parametric_fixup __PROTO((struct curve_points * start_plot, int *plot_num));
60:
61:
62: /* the curves/surfaces of the plot */
63: struct curve_points *first_plot = NULL;
64: static struct udft_entry plot_func;
65: extern struct udft_entry *dummy_func;
66:
67: /* jev -- for passing data thru user-defined function */
68: /* Needed by datafile.c */
69: struct udft_entry ydata_func;
70:
71: extern int datatype[];
72: extern char timefmt[];
73:
74: extern TBOOLEAN is_3d_plot;
75: extern int plot_token;
76:
77: /* in order to support multiple axes, and to
78: * simplify ranging in parametric plots, we use
79: * arrays to store some things.
80: * Elements are z = 0, y1 = 1, x1 = 2, [z2 =4 ], y2 = 5, x2 = 6
81: * these are given symbolic names in plot.h
82: */
83:
84: /* Were declared in command.c */
85: double min_array[AXIS_ARRAY_SIZE], max_array[AXIS_ARRAY_SIZE];
86: int auto_array[AXIS_ARRAY_SIZE];
87: TBOOLEAN log_array[AXIS_ARRAY_SIZE];
88: double base_array[AXIS_ARRAY_SIZE];
89: double log_base_array[AXIS_ARRAY_SIZE];
90:
91: /* Deleted from setshow.h and renamed */
92: extern FILE *gpoutfile;
93:
94: /* if user specifies [10:-10] we use [-10:10] internally, and swap at end */
95: int reverse_range[AXIS_ARRAY_SIZE];
96:
97: /* info from datafile module */
98: extern int df_datum;
99: extern int df_line_number;
100: extern int df_no_use_specs;
101: extern int df_eof;
102: extern int df_timecol[];
103: extern TBOOLEAN df_binary;
104:
105: #define Inc_c_token if (++c_token >= num_tokens) \
106: int_error ("Syntax error", c_token);
107:
108:
109: /*
110: * IMHO, code is getting too cluttered with repeated chunks of
111: * code. Some macros to simplify, I hope.
112: *
113: * do { } while(0) is comp.lang.c recommendation for complex macros
114: * also means that break can be specified as an action, and it will
115: *
116: */
117:
118: /* copy scalar data to arrays
119: * optimiser should optimise infinite away
120: * dont know we have to support ranges [10:-10] - lets reverse
121: * it for now, then fix it at the end.
122: */
123: #define INIT_ARRAYS(axis, min, max, auto, is_log, base, log_base, infinite) \
124: do{auto_array[axis] = auto; \
125: min_array[axis] = (infinite && (auto&1)) ? VERYLARGE : min; \
126: max_array[axis] = (infinite && (auto&2)) ? -VERYLARGE : max; \
127: log_array[axis] = is_log; base_array[axis] = base; log_base_array[axis] = log_base;\
128: }while(0)
129: /* handle reversed ranges */
130: #define CHECK_REVERSE(axis) \
131: do{\
132: if (auto_array[axis] == 0 && max_array[axis] < min_array[axis]) {\
133: double temp = min_array[axis]; min_array[axis] = max_array[axis]; max_array[axis] = temp;\
134: reverse_range[axis] = 1; \
135: } else reverse_range[axis] = (range_flags[axis]&RANGE_REVERSE); \
136: }while(0)
137:
138:
139: /* get optional [min:max] */
140: #define LOAD_RANGE(axis) \
141: do {\
142: if (equals(c_token, "[")) { \
143: c_token++; \
144: auto_array[axis] = load_range(axis,&min_array[axis], &max_array[axis], auto_array[axis]);\
145: if (!equals(c_token, "]"))\
146: int_error("']' expected", c_token);\
147: c_token++;\
148: }\
149: } while (0)
150:
151:
152: /* store VALUE or log(VALUE) in STORE, set TYPE as appropriate
153: * Do OUT_ACTION or UNDEF_ACTION as appropriate
154: * adjust range provided type is INRANGE (ie dont adjust y if x is outrange
155: * VALUE must not be same as STORE
156: */
157:
158: #define STORE_WITH_LOG_AND_FIXUP_RANGE(STORE, VALUE, TYPE, AXIS, OUT_ACTION, UNDEF_ACTION)\
159: do { if (log_array[AXIS]) { if (VALUE<0.0) {TYPE = UNDEFINED; UNDEF_ACTION; break;} \
160: else if (VALUE == 0.0){STORE = -VERYLARGE; TYPE = OUTRANGE; OUT_ACTION; break;} \
161: else { STORE = log(VALUE)/log_base_array[AXIS]; } \
162: } else STORE = VALUE; \
163: if (TYPE != INRANGE) break; /* dont set y range if x is outrange, for example */ \
164: if ( VALUE<min_array[AXIS] ) { \
165: if (auto_array[AXIS] & 1) min_array[AXIS] = VALUE; else { TYPE = OUTRANGE; OUT_ACTION; break; } \
166: } \
167: if ( VALUE>max_array[AXIS] ) { \
168: if (auto_array[AXIS] & 2) max_array[AXIS] = VALUE; else { TYPE = OUTRANGE; OUT_ACTION; } \
169: } \
170: } while(0)
171:
172: /* use this instead empty macro arguments to work around NeXT cpp bug */
173: /* if this fails on any system, we might use ((void)0) */
174: #define NOOP /* */
175:
176: /* check range and take logs of min and max if logscale
177: * this also restores min and max for ranges like [10:-10]
178: */
179: #ifdef HAVE_STRINGIZE
180: # define LOG_MSG(x) #x " range must be greater than 0 for log scale!"
181: #else
182: # define LOG_MSG(x) "x range must be greater than 0 for log scale!"
183: #endif
184:
185: #define FIXUP_RANGE_FOR_LOG(AXIS, WHICH) \
186: do { if (reverse_range[AXIS]) { \
187: double temp = min_array[AXIS]; \
188: min_array[AXIS] = max_array[AXIS]; \
189: max_array[AXIS] = temp; \
190: }\
191: if (log_array[AXIS]) { \
192: if (min_array[AXIS] <= 0.0 || max_array[AXIS] <= 0.0) \
193: int_error(LOG_MSG(WHICH), NO_CARET); \
194: min_array[AXIS] = log(min_array[AXIS])/log_base_array[AXIS]; \
195: max_array[AXIS] = log(max_array[AXIS])/log_base_array[AXIS]; \
196: } \
197: } while(0)
198:
199:
200:
201: void plotrequest()
202: /*
203: * In the parametric case we can say plot [a= -4:4] [-2:2] [-1:1] sin(a),a**2
204: * while in the non-parametric case we would say only plot [b= -2:2] [-1:1]
205: * sin(b)
206: */
207: {
208: int dummy_token = -1;
209:
210: if (!term) /* unknown */
211: int_error("use 'set term' to set terminal type first", c_token);
212:
213: is_3d_plot = FALSE;
214:
215: if (parametric && strcmp(dummy_var[0], "u") == 0)
216: strcpy(dummy_var[0], "t");
217:
218: /* initialise the arrays from the 'set' scalars */
219:
220: INIT_ARRAYS(FIRST_X_AXIS, xmin, xmax, autoscale_x, is_log_x, base_log_x, log_base_log_x, 0);
221: INIT_ARRAYS(FIRST_Y_AXIS, ymin, ymax, autoscale_y, is_log_y, base_log_y, log_base_log_y, 1);
222: INIT_ARRAYS(SECOND_X_AXIS, x2min, x2max, autoscale_x2, is_log_x2, base_log_x2, log_base_log_x2, 0);
223: INIT_ARRAYS(SECOND_Y_AXIS, y2min, y2max, autoscale_y2, is_log_y2, base_log_y2, log_base_log_y2, 1);
224:
225: min_array[T_AXIS] = tmin;
226: max_array[T_AXIS] = tmax;
227:
228: if (equals(c_token, "[")) {
229: c_token++;
230: if (isletter(c_token)) {
231: if (equals(c_token + 1, "=")) {
232: dummy_token = c_token;
233: c_token += 2;
234: } else {
235: /* oops; probably an expression with a variable. */
236: /* Parse it as an xmin expression. */
237: /* used to be: int_error("'=' expected",c_token); */
238: }
239: } {
240: int axis = (parametric || polar) ? T_AXIS : FIRST_X_AXIS;
241:
242:
243: auto_array[axis] = load_range(axis, &min_array[axis], &max_array[axis], auto_array[axis]);
244: if (!equals(c_token, "]"))
245: int_error("']' expected", c_token);
246: c_token++;
247: } /* end of scope of 'axis' */
248: } /* first '[' */
249: if (parametric || polar) /* set optional x ranges */
250: LOAD_RANGE(FIRST_X_AXIS);
251: else {
252: /* order of t doesn't matter, but x does */
253: CHECK_REVERSE(FIRST_X_AXIS);
254: }
255:
256: LOAD_RANGE(FIRST_Y_AXIS);
257: CHECK_REVERSE(FIRST_Y_AXIS);
258: LOAD_RANGE(SECOND_X_AXIS);
259: CHECK_REVERSE(SECOND_X_AXIS);
260: LOAD_RANGE(SECOND_Y_AXIS);
261: CHECK_REVERSE(SECOND_Y_AXIS);
262:
263: /* use the default dummy variable unless changed */
264: if (dummy_token >= 0)
265: copy_str(c_dummy_var[0], dummy_token, MAX_ID_LEN);
266: else
267: (void) strcpy(c_dummy_var[0], dummy_var[0]);
268:
269: eval_plots();
270: }
271:
272: /* Use up to 7 columns in data file at once -- originally it was 5 */
273: #define NCOL 7
274:
275:
276: /* A quick note about boxes style. For boxwidth auto, we cannot
277: * calculate widths yet, since it may be sorted, etc. But if
278: * width is set, we must do it now, before logs of xmin/xmax
279: * are taken.
280: * We store -1 in point->z as a marker to mean width needs to be
281: * calculated, or 0 to mean that xmin/xmax are set correctly
282: */
283:
284:
285: static void get_data(this_plot)
286: struct curve_points *this_plot;
287: /* this_plot->token is after datafile spec, for error reporting
288: * it will later be moved passed title/with/linetype/pointtype
289: */
290: {
291: register int i /* num. points ! */ , j, col;
292: double v[NCOL];
293: int storetoken = this_plot->token;
294:
295: /* eval_plots has already opened file */
296:
297: switch (this_plot->plot_style) { /* set maximum columns to scan */
298: case XYERRORBARS:
299: case BOXXYERROR:
300: col = 7;
301: break;
302:
303: case BOXERROR:
304: case FINANCEBARS:
305: case CANDLESTICKS:
306: col = 5;
307: break;
308:
309: case XERRORBARS:
310: case YERRORBARS:
311: case VECTOR:
312: col = 4;
313: break;
314:
315: case BOXES:
316: col = 4;
317: break;
318:
319: default:
320: col = 2;
321: }
322:
323: if (this_plot->plot_smooth == ACSPLINES)
324: col = 3;
325:
326: if (df_no_use_specs > col)
327: fputs("warning : too many using specs for this style\n", stderr);
328:
329: i = 0;
330: while ((j = df_readline(v, col)) != DF_EOF) {
331: /* j <= col */
332:
333: if (i >= this_plot->p_max) {
334: /*
335: * overflow about to occur. Extend size of points[] array. We
336: * either double the size, or add 1000 points, whichever is a
337: * smaller increment. Note i = p_max.
338: */
339: cp_extend(this_plot, i + (i < 1000 ? i : 1000));
340: }
341: /* Limitation: No xerrorbars with boxes */
342: switch (j) {
343: default:
344: {
345: char message[80];
346: sprintf(message, "internal error : df_readline returned %d : datafile line %d", j, df_line_number);
347: df_close();
348: int_error(message, c_token);
349: }
350: case DF_UNDEFINED:
351: /* bad result from extended using expression */
352: this_plot->points[i].type = UNDEFINED;
353: i++;
354: continue;
355:
356: case DF_FIRST_BLANK:
357: /* break in data, make next point undefined */
358: this_plot->points[i].type = UNDEFINED;
359: i++;
360: continue;
361:
362: case DF_SECOND_BLANK:
363: /* second blank line. We dont do anything
364: * (we did everything when we got FIRST one)
365: */
366: continue;
367:
368: case 0: /* not blank line, but df_readline couldn't parse it */
369: {
370: char message[80];
371: sprintf(message, "Bad data on line %d", df_line_number);
372: df_close();
373: int_error(message, this_plot->token);
374: }
375:
376: case 1:
377: { /* only one number */
378: /* x is index, assign number to y */
379: v[1] = v[0];
380: v[0] = df_datum;
381: /* nobreak */
382: }
383:
384: case 2:
385: /* x, y */
386: /* ylow and yhigh are same as y */
387:
388: if (this_plot->plot_style == BOXES && boxwidth > 0) {
389: /* calc width now */
390: store2d_point(this_plot, i++, v[0], v[1], v[0] - boxwidth / 2, v[0] + boxwidth / 2, v[1], v[1], 0.0);
391: } else {
392: /* xlow and xhigh are same as x */
393: store2d_point(this_plot, i++, v[0], v[1], v[0], v[0], v[1], v[1],
394: -1.0); /* auto width if boxes, else ignored */
395: }
396: break;
397:
398:
399: case 3:
400: /* x, y, ydelta OR x, y, xdelta OR x, y, width */
401: if (this_plot->plot_smooth == ACSPLINES)
402: store2d_point(this_plot, i++, v[0], v[1], v[0], v[0], v[1], v[1], v[2]);
403: else
404: switch (this_plot->plot_style) {
405: default:
406: int_warn("This plot style not work with 3 cols. Setting to yerrorbars", storetoken);
407: this_plot->plot_style = YERRORBARS;
408: /* fall through */
409:
410: case YERRORBARS:
411: case BOXERROR: /* x, y, dy */
412: store2d_point(this_plot, i++, v[0], v[1], v[0], v[0], v[1] - v[2], v[1] + v[2],
413: -1.0); /* auto width if boxes, else ignored */
414: break;
415:
416: case XERRORBARS:
417: store2d_point(this_plot, i++, v[0], v[1], v[0] - v[2], v[0] + v[2], v[1], v[1], 0.0);
418: break;
419:
420: case BOXES:
421: /* calculate xmin and xmax here, so that logs are taken if
422: * if necessary
423: */
424: store2d_point(this_plot, i++, v[0], v[1], v[0] - v[2] / 2, v[0] + v[2] / 2, v[1], v[1], 0.0);
425: break;
426:
427: } /*inner switch */
428:
429: break;
430:
431:
432:
433: case 4:
434: /* x, y, ylow, yhigh OR
435: * x, y, xlow, xhigh OR
436: * x, y, xdelta, ydelta OR
437: * x, y, ydelta, width
438: */
439:
440: switch (this_plot->plot_style) {
441: default:
442: int_warn("This plot style does not work with 4 cols. Setting to yerrorbars",
443: storetoken);
444: this_plot->plot_style = YERRORBARS;
445: /* fall through */
446:
447: case YERRORBARS:
448: store2d_point(this_plot, i++, v[0], v[1], v[0], v[0], v[2], v[3], -1.0);
449: break;
450:
451: case BOXXYERROR: /* x, y, dx, dy */
452: case XYERRORBARS:
453: store2d_point(this_plot, i++, v[0], v[1], v[0] - v[2], v[0] + v[2], v[1] - v[3], v[1] + v[3], 0.0);
454: break;
455:
456:
457: case BOXES: /* x, y, xmin, xmax */
458: store2d_point(this_plot, i++, v[0], v[1], v[2], v[3], v[1], v[1], 0.0);
459: break;
460:
461: case XERRORBARS:
462: store2d_point(this_plot, i++, v[0], v[1], v[2], v[3], v[1], v[1], 0.0);
463: break;
464:
465: case BOXERROR:
466: /* x,y, xleft, xright */
467: store2d_point(this_plot, i++, v[0], v[1], v[0], v[0], v[1] - v[2], v[1] + v[2], 0.0);
468: break;
469:
470: case VECTOR:
471: /* x,y,dx,dy */
472: store2d_point(this_plot, i++, v[0], v[1], v[0], v[0] + v[2], v[1], v[1] + v[3], -1.0);
473: break;
474: } /*inner switch */
475:
476: break;
477:
478:
479: case 5:
480: { /* x, y, ylow, yhigh, width or x open low high close */
481: switch (this_plot->plot_style) {
482: default:
483: int_warn("Five col. plot style must be boxerrorbars, financebars or candlesticks. Setting to boxerrorbars", storetoken);
484: this_plot->plot_style = BOXERROR;
485: /*fall through */
486:
487: case BOXERROR: /* x, y, ylow, yhigh, width */
488: store2d_point(this_plot, i++, v[0], v[1], v[0] - v[4] / 2, v[0] + v[4] / 2, v[2], v[3], 0.0);
489: break;
490:
491: case FINANCEBARS:
492: case CANDLESTICKS:
493: store2d_point(this_plot, i++, v[0], v[1], v[0], v[0], v[2], v[3], v[4]);
494: break;
495: }
496: break;
497: }
498:
499: case 7:
500: /* same as six columns. Width ignored */
501: /* eh ? - fall through */
502: case 6:
503: /* x, y, xlow, xhigh, ylow, yhigh */
504: switch (this_plot->plot_style) {
505: default:
506: int_warn("This plot style not work with 6 cols. Setting to xyerrorbars", storetoken);
507: this_plot->plot_style = XYERRORBARS;
508: /*fall through */
509: case XYERRORBARS:
510: case BOXXYERROR:
511: store2d_point(this_plot, i++, v[0], v[1], v[2], v[3], v[4], v[5], 0.0);
512: break;
513: }
514:
515: } /*switch */
516:
517: } /*while */
518:
519: this_plot->p_count = i;
520: cp_extend(this_plot, i); /* shrink to fit */
521:
522: df_close();
523: }
524:
525: /* called by get_data for each point */
526: static void store2d_point(this_plot, i, x, y, xlow, xhigh, ylow, yhigh, width)
527: struct curve_points *this_plot;
528: int i; /* point number */
529: double x, y;
530: double ylow, yhigh;
531: double xlow, xhigh;
532: double width; /* -1 means autocalc, 0 means use xmin/xmax */
533: {
534: struct coordinate GPHUGE *cp = &(this_plot->points[i]);
535: int dummy_type = INRANGE; /* sometimes we dont care about outranging */
536:
537:
538: /* jev -- pass data values thru user-defined function */
539: /* div -- y is dummy variable 2 - copy value there */
540: if (ydata_func.at) {
541: struct value val;
542:
543: (void) Gcomplex(&ydata_func.dummy_values[0], y, 0.0);
544: ydata_func.dummy_values[2] = ydata_func.dummy_values[0];
545: evaluate_at(ydata_func.at, &val);
546: y = undefined ? 0.0 : real(&val);
547:
548: (void) Gcomplex(&ydata_func.dummy_values[0], ylow, 0.0);
549: ydata_func.dummy_values[2] = ydata_func.dummy_values[0];
550: evaluate_at(ydata_func.at, &val);
551: ylow = undefined ? 0 : real(&val);
552:
553: (void) Gcomplex(&ydata_func.dummy_values[0], yhigh, 0.0);
554: ydata_func.dummy_values[2] = ydata_func.dummy_values[0];
555: evaluate_at(ydata_func.at, &val);
556: yhigh = undefined ? 0 : real(&val);
557: }
558: dummy_type = cp->type = INRANGE;
559:
560: if (polar) {
561: double newx, newy;
562: if (!(autoscale_r & 2) && y > rmax) {
563: cp->type = OUTRANGE;
564: }
565: if (!(autoscale_r & 1)) {
566: /* we store internally as if plotting r(t)-rmin */
567: y -= rmin;
568: }
569: newx = y * cos(x * ang2rad);
570: newy = y * sin(x * ang2rad);
571: #if 0 /* HBB 981118: added polar errorbars */
572: /* only lines and points supported with polar */
573: y = ylow = yhigh = newy;
574: x = xlow = xhigh = newx;
575: #else
576: y = newy;
577: x = newx;
578:
579: if (!(autoscale_r & 2) && yhigh > rmax) {
580: cp->type = OUTRANGE;
581: }
582: if (!(autoscale_r & 1)) {
583: /* we store internally as if plotting r(t)-rmin */
584: yhigh -= rmin;
585: }
586: newx = yhigh * cos(xhigh * ang2rad);
587: newy = yhigh * sin(xhigh * ang2rad);
588: yhigh = newy;
589: xhigh = newx;
590:
591: if (!(autoscale_r & 2) && ylow > rmax) {
592: cp->type = OUTRANGE;
593: }
594: if (!(autoscale_r & 1)) {
595: /* we store internally as if plotting r(t)-rmin */
596: ylow -= rmin;
597: }
598: newx = ylow * cos(xlow * ang2rad);
599: newy = ylow * sin(xlow * ang2rad);
600: ylow = newy;
601: xlow = newx;
602: #endif
603: }
604: /* return immediately if x or y are undefined
605: * we dont care if outrange for high/low.
606: * BUT if high/low undefined (ie log( < 0 ), no number is stored,
607: * but graphics.c doesn't know.
608: * explicitly store -VERYLARGE;
609: */
610: STORE_WITH_LOG_AND_FIXUP_RANGE(cp->x, x, cp->type, this_plot->x_axis, NOOP, return);
611: STORE_WITH_LOG_AND_FIXUP_RANGE(cp->xlow, xlow, dummy_type, this_plot->x_axis, NOOP, cp->xlow = -VERYLARGE);
612: STORE_WITH_LOG_AND_FIXUP_RANGE(cp->xhigh, xhigh, dummy_type, this_plot->x_axis, NOOP, cp->xhigh = -VERYLARGE);
613: STORE_WITH_LOG_AND_FIXUP_RANGE(cp->y, y, cp->type, this_plot->y_axis, NOOP, return);
614: STORE_WITH_LOG_AND_FIXUP_RANGE(cp->ylow, ylow, dummy_type, this_plot->y_axis, NOOP, cp->ylow = -VERYLARGE);
615: STORE_WITH_LOG_AND_FIXUP_RANGE(cp->yhigh, yhigh, dummy_type, this_plot->y_axis, NOOP, cp->yhigh = -VERYLARGE);
616: cp->z = width;
617: } /* store2d_point */
618:
619:
620:
621: /*
622: * print_points: a debugging routine to print out the points of a curve, and
623: * the curve structure. If curve<0, then we print the list of curves.
624: */
625:
626: #if 0 /* not used */
627: static char *plot_type_names[4] =
628: {
629: "Function", "Data", "3D Function", "3d data"
630: };
631: static char *plot_style_names[14] =
632: {
633: "Lines", "Points", "Impulses", "LinesPoints", "Dots", "XErrorbars",
634: "YErrorbars", "XYErrorbars", "BoxXYError", "Boxes", "Boxerror", "Steps",
635: "FSteps", "Vector"
636: };
637: static char *plot_smooth_names[5] =
638: {
639: "None", "Unique", "CSplines", "ACSplines", "Bezier", "SBezier"
640: };
641:
642: static void print_points(curve)
643: int curve; /* which curve to print */
644: {
645: register struct curve_points *this_plot;
646: int i;
647:
648: if (curve < 0) {
649: for (this_plot = first_plot, i = 0;
650: this_plot != NULL;
651: i++, this_plot = this_plot->next_cp) {
652: printf("Curve %d:\n", i);
653: if ((int) this_plot->plot_type >= 0 && (int) (this_plot->plot_type) < 4)
654: printf("Plot type %d: %s\n", (int) (this_plot->plot_type),
655: plot_type_names[(int) (this_plot->plot_type)]);
656: else
657: printf("Plot type %d: BAD\n", (int) (this_plot->plot_type));
658: if ((int) this_plot->plot_style >= 0 && (int) (this_plot->plot_style) < 14)
659: printf("Plot style %d: %s\n", (int) (this_plot->plot_style),
660: plot_style_names[(int) (this_plot->plot_style)]);
661: else
662: printf("Plot style %d: BAD\n", (int) (this_plot->plot_style));
663: if ((int) this_plot->plot_smooth >= 0 && (int) (this_plot->plot_smooth) < 6)
664: printf("Plot smooth style %d: %s\n", (int) (this_plot->plot_style),
665: plot_smooth_names[(int) (this_plot->plot_smooth)]);
666: else
667: printf("Plot smooth style %d: BAD\n", (int) (this_plot->plot_smooth));
668: printf("Plot title: '%s'\n", this_plot->title);
669: printf("Line type %d\n", this_plot->line_type);
670: printf("Point type %d\n", this_plot->point_type);
671: printf("max points %d\n", this_plot->p_max);
672: printf("current points %d\n", this_plot->p_count);
673: printf("\n");
674: }
675: } else {
676: for (this_plot = first_plot, i = 0;
677: i < curve && this_plot != NULL;
678: i++, this_plot = this_plot->next_cp);
679: if (this_plot == NULL)
680: printf("Curve %d does not exist; list has %d curves\n", curve, i);
681: else {
682: printf("Curve %d, %d points\n", curve, this_plot->p_count);
683: for (i = 0; i < this_plot->p_count; i++) {
684: printf("%c x=%g y=%g z=%g xlow=%g xhigh=%g ylow=%g yhigh=%g\n",
685: this_plot->points[i].type == INRANGE ? 'i'
686: : this_plot->points[i].type == OUTRANGE ? 'o'
687: : 'u',
688: this_plot->points[i].x,
689: this_plot->points[i].y,
690: this_plot->points[i].z,
691: this_plot->points[i].xlow,
692: this_plot->points[i].xhigh,
693: this_plot->points[i].ylow,
694: this_plot->points[i].yhigh);
695: }
696: printf("\n");
697: }
698: }
699: }
700: #endif /* not used */
701:
702: static void print_table(this_plot, plot_num)
703: struct curve_points *this_plot;
704: int plot_num;
705: {
706: int i, curve;
707:
708: for (curve = 0; curve < plot_num;
709: curve++, this_plot = this_plot->next_cp) {
710: fprintf(gpoutfile, "#Curve %d, %d points\n#x y type\n", curve, this_plot->p_count);
711: for (i = 0; i < this_plot->p_count; i++) {
712: fprintf(gpoutfile, "%g %g %c\n",
713: this_plot->points[i].x,
714: this_plot->points[i].y,
715: this_plot->points[i].type == INRANGE ? 'i'
716: : this_plot->points[i].type == OUTRANGE ? 'o'
717: : 'u');
718: }
719: fputc('\n', gpoutfile);
720: }
721: /* two blank lines between plots in table output */
722: fputc('\n', gpoutfile);
723: fflush(gpoutfile);
724: }
725:
726: /*
727: * This parses the plot command after any range specifications. To support
728: * autoscaling on the x axis, we want any data files to define the x range,
729: * then to plot any functions using that range. We thus parse the input
730: * twice, once to pick up the data files, and again to pick up the functions.
731: * Definitions are processed twice, but that won't hurt.
732: * div - okay, it doesn't hurt, but every time an option as added for
733: * datafiles, code to parse it has to be added here. Change so that
734: * we store starting-token in the plot structure.
735: */
736: static void eval_plots()
737: {
738: register int i;
739: register struct curve_points *this_plot, **tp_ptr;
740:
741: int some_functions = 0;
742: int plot_num, line_num, point_num, xparam = 0;
743: char *xtitle;
744: int begin_token = c_token; /* so we can rewind for second pass */
745:
746: int uses_axis[AXIS_ARRAY_SIZE];
747:
748: uses_axis[FIRST_X_AXIS] =
749: uses_axis[FIRST_Y_AXIS] =
750: uses_axis[SECOND_X_AXIS] =
751: uses_axis[SECOND_Y_AXIS] = 0;
752:
753: /* Reset first_plot. This is usually done at the end of this function.
754: If there is an error within this function, the memory is left allocated,
755: since we cannot call cp_free if the list is incomplete. Making sure that
756: the list structure is always vaild requires some rewriting */
757: first_plot = NULL;
758:
759: tp_ptr = &(first_plot);
760: plot_num = 0;
761: line_num = 0; /* default line type */
762: point_num = 0; /* default point type */
763:
764: xtitle = NULL;
765:
766: /*** First Pass: Read through data files ***
767: * This pass serves to set the xrange and to parse the command, as well
768: * as filling in every thing except the function data. That is done after
769: * the xrange is defined.
770: */
771: while (TRUE) {
772: if (END_OF_COMMAND)
773: int_error("function to plot expected", c_token);
774:
775: if (is_definition(c_token)) {
776: define();
777: } else {
778: int x_axis = 0, y_axis = 0;
779: int specs;
780:
781: /* for datafile plot, record datafile spec for title */
782: int start_token = c_token, end_token;
783:
784: plot_num++;
785:
786: if (isstring(c_token)) { /* data file to plot */
787:
788: if (parametric && xparam)
789: int_error("previous parametric function not fully specified", c_token);
790:
791: if (*tp_ptr)
792: this_plot = *tp_ptr;
793: else { /* no memory malloc()'d there yet */
794: this_plot = cp_alloc(MIN_CRV_POINTS);
795: *tp_ptr = this_plot;
796: }
797: this_plot->plot_type = DATA;
798: this_plot->plot_style = data_style;
799: this_plot->plot_smooth = NONE;
800:
801: specs = df_open(NCOL); /* up to NCOL cols */
802: /* this parses data-file-specific modifiers only */
803: /* we'll sort points when we know style, if necessary */
804: if (df_binary)
805: int_error("2d binary files not yet supported", c_token);
806:
807: this_plot->token = end_token = c_token - 1; /* include modifiers in default title */
808:
809: } else {
810:
811: /* function to plot */
812:
813: some_functions = 1;
814: if (parametric) /* working on x parametric function */
815: xparam = 1 - xparam;
816: if (*tp_ptr) {
817: this_plot = *tp_ptr;
818: cp_extend(this_plot, samples + 1);
819: } else { /* no memory malloc()'d there yet */
820: this_plot = cp_alloc(samples + 1);
821: *tp_ptr = this_plot;
822: }
823: this_plot->plot_type = FUNC;
824: this_plot->plot_style = func_style;
825: dummy_func = &plot_func;
826: plot_func.at = temp_at();
827: dummy_func = NULL;
828: /* ignore it for now */
829: end_token = c_token - 1;
830: } /* end of IS THIS A FILE OR A FUNC block */
831:
832:
833: /* deal with smooth */
834: if (almost_equals(c_token, "s$mooth")) {
835:
836: if (END_OF_COMMAND)
837: int_error("expecting smooth parameter", c_token);
838: else {
839: c_token++;
840: if (almost_equals(c_token, "u$nique"))
841: this_plot->plot_smooth = UNIQUE;
842: else if (almost_equals(c_token, "a$csplines"))
843: this_plot->plot_smooth = ACSPLINES;
844: else if (almost_equals(c_token, "c$splines"))
845: this_plot->plot_smooth = CSPLINES;
846: else if (almost_equals(c_token, "b$ezier"))
847: this_plot->plot_smooth = BEZIER;
848: else if (almost_equals(c_token, "s$bezier"))
849: this_plot->plot_smooth = SBEZIER;
850: else
851: int_error("expecting 'unique', 'acsplines', 'csplines', 'bezier' or 'sbezier'", c_token);
852: }
853: this_plot->plot_style = LINES;
854: c_token++; /* skip format */
855: }
856: /* look for axes/axis */
857:
858: if (almost_equals(c_token, "ax$es") || almost_equals(c_token, "ax$is")) {
859: if (parametric && xparam)
860: int_error("previous parametric function not fully specified", c_token);
861:
862: if (equals(++c_token, "x1y1")) {
863: x_axis = FIRST_X_AXIS;
864: y_axis = FIRST_Y_AXIS;
865: ++c_token;
866: } else if (equals(c_token, "x2y2")) {
867: x_axis = SECOND_X_AXIS;
868: y_axis = SECOND_Y_AXIS;
869: ++c_token;
870: } else if (equals(c_token, "x1y2")) {
871: x_axis = FIRST_X_AXIS;
872: y_axis = SECOND_Y_AXIS;
873: ++c_token;
874: } else if (equals(c_token, "x2y1")) {
875: x_axis = SECOND_X_AXIS;
876: y_axis = FIRST_Y_AXIS;
877: ++c_token;
878: } else
879: int_error("axes must be x1y1, x1y2, x2y1 or x2y2", c_token);
880: } else {
881: x_axis = FIRST_X_AXIS;
882: y_axis = FIRST_Y_AXIS;
883: }
884:
885:
886: this_plot->x_axis = x_axis;
887: this_plot->y_axis = y_axis;
888:
889: /* we can now do some checks that we deferred earlier */
890:
891: if (this_plot->plot_type == DATA) {
892: if (!(uses_axis[x_axis] & 1) && autoscale_lx) {
893: if (auto_array[x_axis] & 1)
894: min_array[x_axis] = VERYLARGE;
895: if (auto_array[x_axis] & 2)
896: max_array[x_axis] = -VERYLARGE;
897: }
898: if (datatype[x_axis] == TIME) {
899: if (specs < 2)
900: int_error("Need full using spec for x time data", c_token);
901: df_timecol[0] = 1;
902: }
903: if (datatype[y_axis] == TIME) {
904: if (specs < 1)
905: int_error("Need using spec for y time data", c_token);
906: df_timecol[y_axis] = 1; /* need other cols, but I'm lazy */
907: }
908: uses_axis[x_axis] |= 1; /* separate record of datafile and func */
909: uses_axis[y_axis] |= 1;
910: } else if (!parametric || !xparam) {
911: /* for x part of a parametric function, axes are possibly wrong */
912: uses_axis[x_axis] |= 2; /* separate record of data and func */
913: uses_axis[y_axis] |= 2;
914: }
915: if (almost_equals(c_token, "t$itle")) {
916: if (parametric) {
917: if (xparam)
918: int_error("\"title\" allowed only after parametric function fully specified", c_token);
919: else if (xtitle != NULL)
920: xtitle[0] = '\0'; /* Remove default title . */
921: }
922: c_token++;
923: if (isstring(c_token)) {
924: m_quote_capture(&(this_plot->title), c_token, c_token);
925: } else {
926: int_error("expecting \"title\" for plot", c_token);
927: }
928: c_token++;
929: } else if (almost_equals(c_token, "not$itle")) {
930: if (xtitle != NULL)
931: xtitle[0] = '\0';
932: c_token++;
933: } else {
934: m_capture(&(this_plot->title), start_token, end_token);
935: if (xparam)
936: xtitle = this_plot->title;
937: }
938:
939:
940: if (almost_equals(c_token, "w$ith")) {
941: if (parametric && xparam)
942: int_error("\"with\" allowed only after parametric function fully specified", c_token);
943: this_plot->plot_style = get_style();
944: }
945: /* pick up line/point specs
946: * - point spec allowed if style uses points, ie style&2 != 0
947: * - keywords for lt and pt are optional
948: */
949: LP_PARSE(this_plot->lp_properties, 1, this_plot->plot_style & 2,
950: line_num, point_num);
951:
952: /* allow old-style syntax too - ignore case lt 3 4 for example */
953: if (!equals(c_token, ",") && !END_OF_COMMAND) {
954: struct value t;
955: this_plot->lp_properties.l_type =
956: this_plot->lp_properties.p_type = (int) real(const_express(&t)) - 1;
957:
958: if (!equals(c_token, ",") && !END_OF_COMMAND)
959: this_plot->lp_properties.p_type = (int) real(const_express(&t)) - 1;
960: }
961: if (!xparam) {
962: if (this_plot->plot_style & 2) /* style includes points */
963: ++point_num;
964: ++line_num;
965: }
966: if (this_plot->plot_type == DATA) {
967: /* actually get the data now */
968: get_data(this_plot);
969:
970: /* sort */
971: switch (this_plot->plot_smooth) { /* sort and average, if */
972: case UNIQUE: /* the style requires */
973: case CSPLINES:
974: case ACSPLINES:
975: case SBEZIER:
976: sort_points(this_plot);
977: cp_implode(this_plot);
978: break;
979: default:
980: ; /* keep gcc -Wall happy */
981: }
982: switch (this_plot->plot_smooth) { /* create new data set */
983: case SBEZIER: /* by evaluation of */
984: case BEZIER: /* interpolation routines */
985: case ACSPLINES:
986: case CSPLINES:
987: gen_interp(this_plot);
988: break;
989: default:
990: ; /* keep gcc -Wall happy */
991: }
992:
993: /* now that we know the plot style, adjust the x- and yrange */
994: /* adjust_range(this_plot); no longer needed */
995: }
996: this_plot->token = c_token; /* save end of plot for second pass */
997: tp_ptr = &(this_plot->next_cp);
998:
999: } /* !is_defn */
1000:
1001: if (equals(c_token, ","))
1002: c_token++;
1003: else
1004: break;
1005: }
1006:
1007: if (parametric && xparam)
1008: int_error("parametric function not fully specified", NO_CARET);
1009:
1010:
1011: /*** Second Pass: Evaluate the functions ***/
1012: /*
1013: * Everything is defined now, except the function data. We expect no
1014: * syntax errors, etc, since the above parsed it all. This makes the code
1015: * below simpler. If autoscale_ly, the yrange may still change.
1016: * we stored last token of each plot, so we dont need to do everything again
1017: */
1018:
1019: /* give error if xrange badly set from missing datafile error
1020: * parametric or polar fns can still affect x ranges
1021: */
1022:
1023: if (!parametric && !polar) {
1024: if (min_array[FIRST_X_AXIS] == VERYLARGE ||
1025: max_array[FIRST_X_AXIS] == -VERYLARGE)
1026: int_error("x range is invalid", c_token);
1027: /* check that xmin -> xmax is not too small */
1028: fixup_range(FIRST_X_AXIS, "x");
1029:
1030: if (uses_axis[SECOND_X_AXIS] & 1) {
1031: /* some data plots with x2 */
1032: if (min_array[SECOND_X_AXIS] == VERYLARGE ||
1033: max_array[SECOND_X_AXIS] == -VERYLARGE)
1034: int_error("x2 range is invalid", c_token);
1035: /* check that x2min -> x2max is not too small */
1036: fixup_range(SECOND_X_AXIS, "x2");
1037: } else if (auto_array[SECOND_X_AXIS]) {
1038: /* copy x1's range */
1039: if (auto_array[SECOND_X_AXIS] & 1)
1040: min_array[SECOND_X_AXIS] = min_array[FIRST_X_AXIS];
1041: if (auto_array[SECOND_X_AXIS] & 2)
1042: max_array[SECOND_X_AXIS] = max_array[FIRST_X_AXIS];
1043: }
1044: }
1045: if (some_functions) {
1046:
1047: /* call the controlled variable t, since x_min can also mean smallest x */
1048: double t_min, t_max, t_step;
1049:
1050: if (parametric || polar) {
1051: if (!(uses_axis[FIRST_X_AXIS] & 1)) {
1052: /* these have not yet been set to full width */
1053: if (auto_array[FIRST_X_AXIS] & 1)
1054: min_array[FIRST_X_AXIS] = VERYLARGE;
1055: if (auto_array[FIRST_X_AXIS] & 2)
1056: max_array[FIRST_X_AXIS] = -VERYLARGE;
1057: }
1058: if (!(uses_axis[SECOND_X_AXIS] & 1)) {
1059: if (auto_array[SECOND_X_AXIS] & 1)
1060: min_array[SECOND_X_AXIS] = VERYLARGE;
1061: if (auto_array[SECOND_X_AXIS] & 2)
1062: max_array[SECOND_X_AXIS] = -VERYLARGE;
1063: }
1064: }
1065: #define SET_DUMMY_RANGE(AXIS) \
1066: do{ assert(!polar && !parametric); \
1067: if (log_array[AXIS]) {\
1068: if (min_array[AXIS] <= 0.0 || max_array[AXIS] <= 0.0)\
1069: int_error("x/x2 range must be greater than 0 for log scale!", NO_CARET);\
1070: t_min = log(min_array[AXIS])/log_base_array[AXIS]; t_max = log(max_array[AXIS])/log_base_array[AXIS];\
1071: } else {\
1072: t_min = min_array[AXIS]; t_max = max_array[AXIS];\
1073: }\
1074: t_step = (t_max - t_min) / (samples - 1); \
1075: }while(0)
1076:
1077: if (parametric || polar) {
1078: t_min = min_array[T_AXIS];
1079: t_max = max_array[T_AXIS];
1080: t_step = (t_max - t_min) / (samples - 1);
1081: }
1082: /* else we'll do it on each plot */
1083:
1084: tp_ptr = &(first_plot);
1085: plot_num = 0;
1086: this_plot = first_plot;
1087: c_token = begin_token; /* start over */
1088:
1089: /* Read through functions */
1090: while (TRUE) {
1091: if (is_definition(c_token)) {
1092: define();
1093: } else {
1094: int x_axis = this_plot->x_axis;
1095: int y_axis = this_plot->y_axis;
1096:
1097: plot_num++;
1098: if (!isstring(c_token)) { /* function to plot */
1099: if (parametric) { /* toggle parametric axes */
1100: xparam = 1 - xparam;
1101: }
1102: dummy_func = &plot_func;
1103: plot_func.at = temp_at(); /* reparse function */
1104:
1105: if (!parametric && !polar) {
1106: SET_DUMMY_RANGE(x_axis);
1107: }
1108: for (i = 0; i < samples; i++) {
1109: double temp;
1110: struct value a;
1111: double t = t_min + i * t_step;
1112: /* parametric/polar => NOT a log quantity */
1113: double x = (!parametric && !polar &&
1114: log_array[x_axis]) ? pow(base_array[x_axis], t) : t;
1115:
1116: (void) Gcomplex(&plot_func.dummy_values[0], x, 0.0);
1117: evaluate_at(plot_func.at, &a);
1118:
1119: if (undefined || (fabs(imag(&a)) > zero)) {
1120: this_plot->points[i].type = UNDEFINED;
1121: continue;
1122: }
1123: temp = real(&a);
1124:
1125: this_plot->points[i].z = -1.0; /* width of box not specified */
1126: this_plot->points[i].type = INRANGE; /* for the moment */
1127:
1128: if (parametric) {
1129: /* we cannot do range-checking now, since for
1130: * the x function we did not know which axes
1131: * we were using
1132: * DO NOT TAKE LOGS YET - do it in parametric_fixup
1133: */
1134: this_plot->points[i].x = t; /* ignored, actually... */
1135: this_plot->points[i].y = temp;
1136: } else if (polar) {
1137: double y;
1138: if (!(autoscale_r & 2) && temp > rmax)
1139: this_plot->points[i].type = OUTRANGE;
1140: if (!(autoscale_r & 1))
1141: temp -= rmin;
1142: y = temp * sin(x * ang2rad);
1143: x = temp * cos(x * ang2rad);
1144: temp = y;
1145: STORE_WITH_LOG_AND_FIXUP_RANGE(this_plot->points[i].x, x, this_plot->points[i].type,
1146: x_axis, NOOP, goto come_here_if_undefined);
1147: STORE_WITH_LOG_AND_FIXUP_RANGE(this_plot->points[i].y, y, this_plot->points[i].type,
1148: y_axis, NOOP, goto come_here_if_undefined);
1149: } else { /* neither parametric or polar */
1150: /* If non-para, it must be INRANGE */
1151: this_plot->points[i].x = t; /* logscale ? log(x) : x */
1152:
1153: STORE_WITH_LOG_AND_FIXUP_RANGE(this_plot->points[i].y, temp, this_plot->points[i].type,
1154: y_axis + (x_axis - y_axis) * xparam, NOOP, goto come_here_if_undefined);
1155:
1156: come_here_if_undefined: /* could not use a continue in this case */
1157: ; /* ansi requires a statement after a label */
1158: }
1159:
1160: } /* loop over samples */
1161: this_plot->p_count = i; /* samples */
1162: }
1163: c_token = this_plot->token; /* skip all modifers func / whole of data plots */
1164:
1165: tp_ptr = &(this_plot->next_cp); /* used below */
1166: this_plot = this_plot->next_cp;
1167: }
1168:
1169: if (equals(c_token, ","))
1170: c_token++;
1171: else
1172: break;
1173: }
1174:
1175: if (parametric) {
1176: /* Now actually fix the plot pairs to be single plots */
1177: /* also fixes up polar&¶metric fn plots */
1178: parametric_fixup(first_plot, &plot_num);
1179: /* we omitted earlier check for range too small */
1180: fixup_range(FIRST_X_AXIS, "x");
1181: if (uses_axis[SECOND_X_AXIS]) {
1182: fixup_range(SECOND_X_AXIS, "x2");
1183: }
1184: }
1185: } /* some_functions */
1186: /* throw out all curve_points at end of list, that we don't need */
1187: cp_free(*tp_ptr);
1188: *tp_ptr = NULL;
1189:
1190:
1191: /* if first_plot is NULL, we have no functions or data at all. This can
1192: happen, if you type "plot x=5", since x=5 is a variable assignment */
1193:
1194: if (plot_num == 0 || first_plot == NULL) {
1195: int_error("no functions or data to plot", c_token);
1196: }
1197: if (uses_axis[FIRST_X_AXIS]) {
1198: if (max_array[FIRST_X_AXIS] == -VERYLARGE ||
1199: min_array[FIRST_X_AXIS] == VERYLARGE)
1200: int_error("all points undefined!", NO_CARET);
1201: FIXUP_RANGE_FOR_LOG(FIRST_X_AXIS, x);
1202: }
1203: if (uses_axis[SECOND_X_AXIS]) {
1204: if (max_array[SECOND_X_AXIS] == -VERYLARGE ||
1205: min_array[SECOND_X_AXIS] == VERYLARGE)
1206: int_error("all points undefined!", NO_CARET);
1207: FIXUP_RANGE_FOR_LOG(SECOND_X_AXIS, x2);
1208: } else {
1209: assert(uses_axis[FIRST_X_AXIS]);
1210: if (auto_array[SECOND_X_AXIS] & 1)
1211: min_array[SECOND_X_AXIS] = min_array[FIRST_X_AXIS];
1212: if (auto_array[SECOND_X_AXIS] & 2)
1213: max_array[SECOND_X_AXIS] = max_array[FIRST_X_AXIS];
1214: }
1215:
1216: if (!uses_axis[FIRST_X_AXIS]) {
1217: assert(uses_axis[SECOND_X_AXIS]);
1218: if (auto_array[FIRST_X_AXIS] & 1)
1219: min_array[FIRST_X_AXIS] = min_array[SECOND_X_AXIS];
1220: if (auto_array[FIRST_X_AXIS] & 2)
1221: max_array[FIRST_X_AXIS] = max_array[SECOND_X_AXIS];
1222: }
1223: if (uses_axis[FIRST_Y_AXIS]) {
1224: if (max_array[FIRST_Y_AXIS] == -VERYLARGE ||
1225: min_array[FIRST_Y_AXIS] == VERYLARGE)
1226: int_error("all points undefined!", NO_CARET);
1227: fixup_range(FIRST_Y_AXIS, "y");
1228: FIXUP_RANGE_FOR_LOG(FIRST_Y_AXIS, y);
1229: } /* else we want to copy y2 range, but need to fix it up first */
1230: if (uses_axis[SECOND_Y_AXIS]) {
1231: if (max_array[SECOND_Y_AXIS] == -VERYLARGE ||
1232: min_array[SECOND_Y_AXIS] == VERYLARGE)
1233: int_error("all points undefined!", NO_CARET);
1234: fixup_range(SECOND_Y_AXIS, "y2");
1235: FIXUP_RANGE_FOR_LOG(SECOND_Y_AXIS, y2);
1236: } else {
1237: assert(uses_axis[FIRST_Y_AXIS]);
1238: if (auto_array[SECOND_Y_AXIS] & 1)
1239: min_array[SECOND_Y_AXIS] = min_array[FIRST_Y_AXIS];
1240: if (auto_array[SECOND_Y_AXIS] & 2)
1241: max_array[SECOND_Y_AXIS] = max_array[FIRST_Y_AXIS];
1242: }
1243:
1244: if (!uses_axis[FIRST_Y_AXIS]) {
1245: assert(uses_axis[SECOND_Y_AXIS]);
1246: if (auto_array[FIRST_Y_AXIS] & 1)
1247: min_array[FIRST_Y_AXIS] = min_array[SECOND_Y_AXIS];
1248: if (auto_array[FIRST_Y_AXIS] & 2)
1249: max_array[FIRST_Y_AXIS] = max_array[SECOND_Y_AXIS];
1250: }
1251: #define WRITEBACK(axis,min,max) \
1252: if(range_flags[axis]&RANGE_WRITEBACK) \
1253: {if (auto_array[axis]&1) min = min_array[axis]; \
1254: if (auto_array[axis]&2) max = max_array[axis]; \
1255: }
1256:
1257: WRITEBACK(FIRST_X_AXIS, xmin, xmax)
1258: WRITEBACK(FIRST_Y_AXIS, ymin, ymax)
1259: WRITEBACK(SECOND_X_AXIS, x2min, x2max)
1260: WRITEBACK(SECOND_Y_AXIS, y2min, y2max)
1261: if (strcmp(term->name, "table") == 0)
1262: print_table(first_plot, plot_num);
1263: else {
1264: START_LEAK_CHECK(); /* check for memory leaks in this routine */
1265:
1266: /* do_plot now uses max_array[], etc */
1267: do_plot(first_plot, plot_num);
1268:
1269: END_LEAK_CHECK();
1270: }
1271:
1272: /* if we get here, all went well, so record this line for replot */
1273:
1274: if (plot_token != -1) {
1275: /* note that m_capture also frees the old replot_line */
1276: m_capture(&replot_line, plot_token, c_token - 1);
1277: plot_token = -1;
1278: }
1279: cp_free(first_plot);
1280: first_plot = NULL;
1281: } /* eval_plots */
1282:
1283:
1284:
1285:
1286: static void parametric_fixup(start_plot, plot_num)
1287: struct curve_points *start_plot;
1288: int *plot_num;
1289: /*
1290: * The hardest part of this routine is collapsing the FUNC plot types in the
1291: * list (which are garanteed to occur in (x,y) pairs while preserving the
1292: * non-FUNC type plots intact. This means we have to work our way through
1293: * various lists. Examples (hand checked): start_plot:F1->F2->NULL ==>
1294: * F2->NULL start_plot:F1->F2->F3->F4->F5->F6->NULL ==> F2->F4->F6->NULL
1295: * start_plot:F1->F2->D1->D2->F3->F4->D3->NULL ==> F2->D1->D2->F4->D3->NULL
1296: *
1297: */
1298: {
1299: struct curve_points *xp, *new_list = NULL, *free_list = NULL;
1300: struct curve_points **last_pointer = &new_list;
1301: int i, tlen, curve;
1302: char *new_title;
1303:
1304: /*
1305: * Ok, go through all the plots and move FUNC types together. Note: this
1306: * originally was written to look for a NULL next pointer, but gnuplot
1307: * wants to be sticky in grabbing memory and the right number of items in
1308: * the plot list is controlled by the plot_num variable.
1309: *
1310: * Since gnuplot wants to do this sticky business, a free_list of
1311: * curve_points is kept and then tagged onto the end of the plot list as
1312: * this seems more in the spirit of the original memory behavior than
1313: * simply freeing the memory. I'm personally not convinced this sort of
1314: * concern is worth it since the time spent computing points seems to
1315: * dominate any garbage collecting that might be saved here...
1316: */
1317: new_list = xp = start_plot;
1318: curve = 0;
1319:
1320: while (++curve <= *plot_num) {
1321: if (xp->plot_type == FUNC) {
1322: /* Here's a FUNC parametric function defined as two parts. */
1323: struct curve_points *yp = xp->next_cp;
1324:
1325: --(*plot_num);
1326:
1327: assert(xp->p_count == yp->p_count);
1328:
1329: /* because syntax is plot x(t), y(t) axes ..., only
1330: * the y function axes are correct
1331: */
1332:
1333:
1334: /*
1335: * Go through all the points assigning the y's from xp to be the x's
1336: * for yp. In polar mode, we need to check max's and min's as we go.
1337: */
1338:
1339: for (i = 0; i < yp->p_count; ++i) {
1340: if (polar) {
1341: double r = yp->points[i].y;
1342: double t = xp->points[i].y * ang2rad;
1343: double x, y;
1344: if (!(autoscale_r & 2) && r > rmax)
1345: yp->points[i].type = OUTRANGE;
1346: if (!(autoscale_r & 1))
1347: r -= rmin; /* store internally as if plotting r(t)-rmin */
1348: x = r * cos(t);
1349: y = r * sin(t);
1350: /* we hadn't done logs when we stored earlier */
1351: STORE_WITH_LOG_AND_FIXUP_RANGE(yp->points[i].x, x, yp->points[i].type,
1352: xp->x_axis, NOOP, NOOP);
1353: STORE_WITH_LOG_AND_FIXUP_RANGE(yp->points[i].y, y, yp->points[i].type,
1354: xp->y_axis, NOOP, NOOP);
1355: } else {
1356: double x = xp->points[i].y;
1357: double y = yp->points[i].y;
1358: STORE_WITH_LOG_AND_FIXUP_RANGE(yp->points[i].x, x,
1359: yp->points[i].type, yp->x_axis, NOOP, NOOP);
1360: STORE_WITH_LOG_AND_FIXUP_RANGE(yp->points[i].y, y,
1361: yp->points[i].type, yp->y_axis, NOOP, NOOP);
1362: }
1363: }
1364:
1365: /* Ok, fix up the title to include both the xp and yp plots. */
1366: if (xp->title && xp->title[0] != '\0' && yp->title) {
1367: tlen = strlen(yp->title) + strlen(xp->title) + 3;
1368: new_title = gp_alloc((unsigned long) tlen, "string");
1369: strcpy(new_title, xp->title);
1370: strcat(new_title, ", "); /* + 2 */
1371: strcat(new_title, yp->title); /* + 1 = + 3 */
1372: free(yp->title);
1373: yp->title = new_title;
1374: }
1375: /* move xp to head of free list */
1376: xp->next_cp = free_list;
1377: free_list = xp;
1378:
1379: /* append yp to new_list */
1380: *last_pointer = yp;
1381: last_pointer = &(yp->next_cp);
1382: xp = yp->next_cp;
1383:
1384: } else { /* data plot */
1385: assert(*last_pointer == xp);
1386: last_pointer = &(xp->next_cp);
1387: xp = xp->next_cp;
1388: }
1389: } /* loop over plots */
1390:
1391: first_plot = new_list;
1392:
1393: /* Ok, stick the free list at the end of the curve_points plot list. */
1394: *last_pointer = free_list;
1395: }
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