gnuplot-old/src/plot2d.c at pm3d · gnuplot/gnuplot-old · GitHub

Repository navigation

History

1573 lines (1376 loc) · 46.5 KB

Raw

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

261

262

263

264

265

266

267

268

269

270

271

272

273

274

275

276

277

278

279

280

281

282

283

284

285

286

287

288

289

290

291

292

293

294

295

296

297

298

299

300

301

302

303

304

305

306

307

308

309

310

311

312

313

314

315

316

317

318

319

320

321

322

323

324

325

326

327

328

329

330

331

332

333

334

335

336

337

338

339

340

341

342

343

344

345

346

347

348

349

350

351

352

353

354

355

356

357

358

359

360

361

362

363

364

365

366

367

368

369

370

371

372

373

374

375

376

377

378

379

380

381

382

383

384

385

386

387

388

389

390

391

392

393

394

395

396

397

398

399

400

401

402

403

404

405

406

407

408

409

410

411

412

413

414

415

416

417

418

419

420

421

422

423

424

425

426

427

428

429

430

431

432

433

434

435

436

437

438

439

440

441

442

443

444

445

446

447

448

449

450

451

452

453

454

455

456

457

458

459

460

461

462

463

464

465

466

467

468

469

470

471

472

473

474

475

476

477

478

479

480

481

482

483

484

485

486

487

488

489

490

491

492

493

494

495

496

497

498

499

500

501

502

503

504

505

506

507

508

509

510

511

512

513

514

515

516

517

518

519

520

521

522

523

524

525

526

527

528

529

530

531

532

533

534

535

536

537

538

539

540

541

542

543

544

545

546

547

548

549

550

551

552

553

554

555

556

557

558

559

560

561

562

563

564

565

566

567

568

569

570

571

572

573

574

575

576

577

578

579

580

581

582

583

584

585

586

587

588

589

590

591

592

593

594

595

596

597

598

599

600

601

602

603

604

605

606

607

608

609

610

611

612

613

614

615

616

617

618

619

620

621

622

623

624

625

626

627

628

629

630

631

632

633

634

635

636

637

638

639

640

641

642

643

644

645

646

647

648

649

650

651

652

653

654

655

656

657

658

659

660

661

662

663

664

665

666

667

668

669

670

671

672

673

674

675

676

677

678

679

680

681

682

683

684

685

686

687

688

689

690

691

692

693

694

695

696

697

698

699

700

701

702

703

704

705

706

707

708

709

710

711

712

713

714

715

716

717

718

719

720

721

722

723

724

725

726

727

728

729

730

731

732

733

734

735

736

737

738

739

740

741

742

743

744

745

746

747

748

749

750

751

752

753

754

755

756

757

758

759

760

761

762

763

764

765

766

767

768

769

770

771

772

773

774

775

776

777

778

779

780

781

782

783

784

785

786

787

788

789

790

791

792

793

794

795

796

797

798

799

800

801

802

803

804

805

806

807

808

809

810

811

812

813

814

815

816

817

818

819

820

821

822

823

824

825

826

827

828

829

830

831

832

833

834

835

836

837

838

839

840

841

842

843

844

845

846

847

848

849

850

851

852

853

854

855

856

857

858

859

860

861

862

863

864

865

866

867

868

869

870

871

872

873

874

875

876

877

878

879

880

881

882

883

884

885

886

887

888

889

890

891

892

893

894

895

896

897

898

899

900

901

902

903

904

905

906

907

908

909

910

911

912

913

914

915

916

917

918

919

920

921

922

923

924

925

926

927

928

929

930

931

932

933

934

935

936

937

938

939

940

941

942

943

944

945

946

947

948

949

950

951

952

953

954

955

956

957

958

959

960

961

962

963

964

965

966

967

968

969

970

971

972

973

974

975

976

977

978

979

980

981

982

983

984

985

986

987

988

989

990

991

992

993

994

995

996

997

998

999

1000

#ifndef lint

static char *RCSid() { return RCSid("$Id: plot2d.c,v 1.26.2.5 2000/10/24 13:37:52 joze Exp $"); }

#endif

/* GNUPLOT - plot2d.c */

/*[

* Permission to use, copy, and distribute this software and its

* documentation for any purpose with or without fee is hereby granted,

* provided that the above copyright notice appear in all copies and

* that both that copyright notice and this permission notice appear

* in supporting documentation.

* Permission to modify the software is granted, but not the right to

* distribute the complete modified source code. Modifications are to

* be distributed as patches to the released version. Permission to

* distribute binaries produced by compiling modified sources is granted,

* provided you

* 1. distribute the corresponding source modifications from the

* released version in the form of a patch file along with the binaries,

* 2. add special version identification to distinguish your version

* in addition to the base release version number,

* 3. provide your name and address as the primary contact for the

* support of your modified version, and

* 4. retain our contact information in regard to use of the base

* software.

* Permission to distribute the released version of the source code along

* with corresponding source modifications in the form of a patch file is

* granted with same provisions 2 through 4 for binary distributions.

* This software is provided "as is" without express or implied warranty

* to the extent permitted by applicable law.

]*/

#include "plot2d.h"

#include "alloc.h"

#include "binary.h"

#include "command.h"

#include "datafile.h"

#include "graphics.h"

#include "fit.h"

#include "interpol.h"

#include "misc.h"

#include "parse.h"

#include "setshow.h"

#include "tables.h"

#include "term_api.h"

#include "util.h"

#ifndef _Windows

# include "help.h"

#endif

/* static prototypes */

void plot3drequest __PROTO((void));

void define __PROTO((void));

static int get_data __PROTO((struct curve_points *));

static void store2d_point __PROTO((struct curve_points *, int i, double x, double y, double xlow, double xhigh, double ylow, double yhigh, double width));

static void print_table __PROTO((struct curve_points * first_plot, int plot_num));

static void eval_plots __PROTO((void));

static void parametric_fixup __PROTO((struct curve_points * start_plot, int *plot_num));

/* the curves/surfaces of the plot */

struct curve_points *first_plot = NULL;

static struct udft_entry plot_func;

/* in order to support multiple axes, and to

* simplify ranging in parametric plots, we use

* arrays to store some things.

* Elements are z = 0, y1 = 1, x1 = 2, [z2 =4 ], y2 = 5, x2 = 6

* these are given symbolic names in plot.h

/* if user specifies [10:-10] we use [-10:10] internally, and swap at end */

int reverse_range[AXIS_ARRAY_SIZE];

* IMHO, code is getting too cluttered with repeated chunks of

* code. Some macros to simplify, I hope.

* do { } while(0) is comp.lang.c recommendation for complex macros

* also means that break can be specified as an action, and it will

/* copy scalar data to arrays

* optimiser should optimise infinite away

* dont know we have to support ranges [10:-10] - lets reverse

* it for now, then fix it at the end.

#define INIT_ARRAYS(axis, min, max, auto, is_log, base, log_base, infinite) \

do{auto_array[axis] = auto; \

min_array[axis] = (infinite && (auto&1)) ? VERYLARGE : min; \

max_array[axis] = (infinite && (auto&2)) ? -VERYLARGE : max; \

log_array[axis] = is_log; base_array[axis] = base; \

log_base_array[axis] = log_base; \

}while(0)

/* handle reversed ranges */

#define CHECK_REVERSE(axis) \

do{ \

if (auto_array[axis] == 0 && max_array[axis] < min_array[axis]) { \

double temp = min_array[axis]; \

min_array[axis] = max_array[axis]; \

max_array[axis] = temp; \

reverse_range[axis] = 1; \

} else \

reverse_range[axis] = (range_flags[axis]&RANGE_REVERSE); \

}while(0)

/* get optional [min:max] */

#define LOAD_RANGE(axis) \

do { \

if (equals(c_token, "[")) { \

c_token++; \

auto_array[axis] = load_range(axis,&min_array[axis], &max_array[axis], auto_array[axis]); \

if (!equals(c_token, "]")) \

int_error(c_token, "']' expected"); \

c_token++; \

} \

} while (0)

/* store VALUE or log(VALUE) in STORE, set TYPE as appropriate

* Do OUT_ACTION or UNDEF_ACTION as appropriate

* adjust range provided type is INRANGE (ie dont adjust y if x is outrange

* VALUE must not be same as STORE

#define STORE_WITH_LOG_AND_FIXUP_RANGE(STORE, VALUE, TYPE, AXIS, OUT_ACTION, UNDEF_ACTION)\

do { \

if (log_array[AXIS]) { \

if (VALUE<0.0) { \

TYPE = UNDEFINED; \

UNDEF_ACTION; \

break; \

} else if (VALUE == 0.0) { \

STORE = -VERYLARGE; \

TYPE = OUTRANGE; \

OUT_ACTION; \

break; \

} else { \

STORE = log(VALUE)/log_base_array[AXIS]; \

} \

} else \

STORE = VALUE; \

if (TYPE != INRANGE) \

break; /* dont set y range if x is outrange, for example */ \

if ( VALUE<min_array[AXIS] ) { \

if (auto_array[AXIS] & 1) \

min_array[AXIS] = VALUE; \

else { \

TYPE = OUTRANGE; \

OUT_ACTION; break; \

} \

if ( VALUE>max_array[AXIS] ) { \

if (auto_array[AXIS] & 2) \

max_array[AXIS] = VALUE; \

else { \

TYPE = OUTRANGE; \

OUT_ACTION; \

} \

} while(0)

/* use this instead empty macro arguments to work around NeXT cpp bug */

/* if this fails on any system, we might use ((void)0) */

#define NOOP /* */

/* check range and take logs of min and max if logscale

* this also restores min and max for ranges like [10:-10]

#ifdef HAVE_STRINGIZE

# define LOG_MSG(x) #x " range must be greater than 0 for log scale!"

#else

# define LOG_MSG(x) "x range must be greater than 0 for log scale!"

#endif

#define FIXUP_RANGE_FOR_LOG(AXIS, WHICH) \

do { \

if (reverse_range[AXIS]) { \

double temp = min_array[AXIS]; \

min_array[AXIS] = max_array[AXIS]; \

max_array[AXIS] = temp; \

} \

if (log_array[AXIS]) { \

if (min_array[AXIS] <= 0.0 || max_array[AXIS] <= 0.0) \

int_error(NO_CARET, LOG_MSG(WHICH)); \

min_array[AXIS] = log(min_array[AXIS])/log_base_array[AXIS]; \

max_array[AXIS] = log(max_array[AXIS])/log_base_array[AXIS]; \

} \

} while(0)

* In the parametric case we can say plot [a= -4:4] [-2:2] [-1:1] sin(a),a**2

* while in the non-parametric case we would say only plot [b= -2:2] [-1:1]

* sin(b)

void

plotrequest()

{

int dummy_token = -1;

if (!term) /* unknown */

int_error(c_token, "use 'set term' to set terminal type first");

is_3d_plot = FALSE;

if (parametric && strcmp(dummy_var[0], "u") == 0)

strcpy(dummy_var[0], "t");

/* initialise the arrays from the 'set' scalars */

INIT_ARRAYS(FIRST_X_AXIS, xmin, xmax, autoscale_x, is_log_x, base_log_x, log_base_log_x, 0);

INIT_ARRAYS(FIRST_Y_AXIS, ymin, ymax, autoscale_y, is_log_y, base_log_y, log_base_log_y, 1);

INIT_ARRAYS(SECOND_X_AXIS, x2min, x2max, autoscale_x2, is_log_x2, base_log_x2, log_base_log_x2, 0);

INIT_ARRAYS(SECOND_Y_AXIS, y2min, y2max, autoscale_y2, is_log_y2, base_log_y2, log_base_log_y2, 1);

min_array[T_AXIS] = tmin;

max_array[T_AXIS] = tmax;

if (equals(c_token, "[")) {

c_token++;

if (isletter(c_token)) {

if (equals(c_token + 1, "=")) {

dummy_token = c_token;

c_token += 2;

} else {

/* oops; probably an expression with a variable. */

/* Parse it as an xmin expression. */

/* used to be: int_error("'=' expected",c_token); */

}

} {

int axis = (parametric || polar) ? T_AXIS : FIRST_X_AXIS;

auto_array[axis] = load_range(axis, &min_array[axis], &max_array[axis], auto_array[axis]);

if (!equals(c_token, "]"))

int_error(c_token, "']' expected");

c_token++;

} /* end of scope of 'axis' */

} /* first '[' */

if (parametric || polar) /* set optional x ranges */

LOAD_RANGE(FIRST_X_AXIS);

/* order of x range does matter, even if we're in parametric mode */

CHECK_REVERSE(FIRST_X_AXIS);

LOAD_RANGE(FIRST_Y_AXIS);

CHECK_REVERSE(FIRST_Y_AXIS);

LOAD_RANGE(SECOND_X_AXIS);

CHECK_REVERSE(SECOND_X_AXIS);

LOAD_RANGE(SECOND_Y_AXIS);

CHECK_REVERSE(SECOND_Y_AXIS);

/* use the default dummy variable unless changed */

if (dummy_token >= 0)

copy_str(c_dummy_var[0], dummy_token, MAX_ID_LEN);

else

(void) strcpy(c_dummy_var[0], dummy_var[0]);

eval_plots();

}

/* Use up to 7 columns in data file at once -- originally it was 5 */

#define NCOL 7

/* A quick note about boxes style. For boxwidth auto, we cannot

* calculate widths yet, since it may be sorted, etc. But if

* width is set, we must do it now, before logs of xmin/xmax

* are taken.

* We store -1 in point->z as a marker to mean width needs to be

* calculated, or 0 to mean that xmin/xmax are set correctly

static int

get_data(current_plot)

struct curve_points *current_plot;

/* current_plot->token is after datafile spec, for error reporting

* it will later be moved passed title/with/linetype/pointtype

{

int i /* num. points ! */ , j;

int max_cols, min_cols; /* allowed range of column numbers */

double v[NCOL];

int storetoken = current_plot->token;

/* eval_plots has already opened file */

switch (current_plot->plot_style) { /* set maximum columns to scan */

case XYERRORLINES:

case XYERRORBARS:

case BOXXYERROR:

min_cols = 4;

max_cols = 7;

break;

case FINANCEBARS:

case CANDLESTICKS:

min_cols = max_cols = 5;

break;

case BOXERROR:

min_cols = 4;

max_cols = 5;

break;

case VECTOR:

min_cols = max_cols = 4;

break;

case XERRORLINES:

case YERRORLINES:

case XERRORBARS:

case YERRORBARS:

min_cols = 3;

max_cols = 4;

break;

case BOXES:

min_cols = 2;

max_cols = 4;

break;

default:

min_cols = 1;

max_cols = 2;

break;

}

if (current_plot->plot_smooth == SMOOTH_ACSPLINES)

max_cols = 3;

if (df_no_use_specs > max_cols)

int_error(NO_CARET, "Too many using specs for this style");

if (df_no_use_specs > 0 && df_no_use_specs < min_cols)

int_error(NO_CARET, "Not enough columns for this style");

i = 0;

while ((j = df_readline(v, max_cols)) != DF_EOF) {

/* j <= max_cols */

if (i >= current_plot->p_max) {

* overflow about to occur. Extend size of points[] array. We

* either double the size, or add 1000 points, whichever is a

* smaller increment. Note i = p_max.

cp_extend(current_plot, i + (i < 1000 ? i : 1000));

}

/* Limitation: No xerrorbars with boxes */

switch (j) {

default:

{

df_close();

int_error(c_token, "internal error : df_readline returned %d : datafile line %d", j, df_line_number);

}

case DF_UNDEFINED:

/* bad result from extended using expression */

current_plot->points[i].type = UNDEFINED;

i++;

continue;

case DF_FIRST_BLANK:

/* break in data, make next point undefined */

current_plot->points[i].type = UNDEFINED;

i++;

continue;

case DF_SECOND_BLANK:

/* second blank line. We dont do anything

* (we did everything when we got FIRST one)

continue;

case 0: /* not blank line, but df_readline couldn't parse it */

{

df_close();

int_error(current_plot->token,

"Bad data on line %d", df_line_number);

}

case 1:

{ /* only one number */

/* x is index, assign number to y */

v[1] = v[0];

v[0] = df_datum;

/* nobreak */

}

case 2:

/* x, y */

/* ylow and yhigh are same as y */

if (current_plot->plot_style == BOXES && boxwidth > 0) {

/* calc width now */

store2d_point(current_plot, i++, v[0], v[1], v[0] - boxwidth / 2, v[0] + boxwidth / 2, v[1], v[1], 0.0);

} else {

/* xlow and xhigh are same as x */

/* auto width if boxes, else ignored */

store2d_point(current_plot, i++, v[0], v[1], v[0], v[0], v[1],

v[1], -1.0);

}

break;

case 3:

/* x, y, ydelta OR x, y, xdelta OR x, y, width */

if (current_plot->plot_smooth == SMOOTH_ACSPLINES)

store2d_point(current_plot, i++, v[0], v[1], v[0], v[0], v[1],

v[1], v[2]);

else

switch (current_plot->plot_style) {

default:

int_warn(storetoken, "This plot style not work with 3 cols. Setting to yerrorbars");

current_plot->plot_style = YERRORBARS;

/* fall through */

case YERRORLINES:

case YERRORBARS:

case BOXERROR: /* x, y, dy */

/* auto width if boxes, else ignored */

store2d_point(current_plot, i++, v[0], v[1], v[0], v[0],

v[1] - v[2], v[1] + v[2], -1.0);

break;

case XERRORLINES:

case XERRORBARS:

store2d_point(current_plot, i++, v[0], v[1], v[0] - v[2],

v[0] + v[2], v[1], v[1], 0.0);

break;

case BOXES:

/* calculate xmin and xmax here, so that logs are taken if

* if necessary

store2d_point(current_plot, i++, v[0], v[1], v[0] - v[2] / 2,

v[0] + v[2] / 2, v[1], v[1], 0.0);

break;

} /*inner switch */

break;

case 4:

/* x, y, ylow, yhigh OR

* x, y, xlow, xhigh OR

* x, y, xdelta, ydelta OR

* x, y, ydelta, width

switch (current_plot->plot_style) {

default:

int_warn(storetoken, "This plot style does not work with 4 cols. Setting to yerrorbars");

current_plot->plot_style = YERRORBARS;

/* fall through */

case YERRORLINES:

case YERRORBARS:

store2d_point(current_plot, i++, v[0], v[1], v[0], v[0], v[2],

v[3], -1.0);

break;

case BOXXYERROR: /* x, y, dx, dy */

case XYERRORLINES:

case XYERRORBARS:

store2d_point(current_plot, i++, v[0], v[1], v[0] - v[2],

v[0] + v[2], v[1] - v[3], v[1] + v[3], 0.0);

break;

case BOXES: /* x, y, xmin, xmax */

store2d_point(current_plot, i++, v[0], v[1], v[2], v[3], v[1],

v[1], 0.0);

break;

case XERRORLINES:

case XERRORBARS:

store2d_point(current_plot, i++, v[0], v[1], v[2], v[3], v[1],

v[1], 0.0);

break;

case BOXERROR:

/* x,y, xleft, xright */

store2d_point(current_plot, i++, v[0], v[1], v[0], v[0],

v[1] - v[2], v[1] + v[2], 0.0);

break;

case VECTOR:

/* x,y,dx,dy */

store2d_point(current_plot, i++, v[0], v[1], v[0], v[0] + v[2],

v[1], v[1] + v[3], -1.0);

break;

} /*inner switch */

break;

case 5:

{ /* x, y, ylow, yhigh, width or x open low high close */

switch (current_plot->plot_style) {

default:

int_warn(storetoken, "Five col. plot style must be boxerrorbars, financebars or candlesticks. Setting to boxerrorbars");

current_plot->plot_style = BOXERROR;

/*fall through */

case BOXERROR: /* x, y, ylow, yhigh, width */

store2d_point(current_plot, i++, v[0], v[1], v[0] - v[4] / 2,

v[0] + v[4] / 2, v[2], v[3], 0.0);

break;

case FINANCEBARS:

case CANDLESTICKS:

store2d_point(current_plot, i++, v[0], v[1], v[0], v[0],

v[2], v[3], v[4]);

break;

}

break;

}

case 7:

/* same as six columns. Width ignored */

/* eh ? - fall through */

case 6:

/* x, y, xlow, xhigh, ylow, yhigh */

switch (current_plot->plot_style) {

default:

int_warn(storetoken, "This plot style not work with 6 cols. Setting to xyerrorbars");

current_plot->plot_style = XYERRORBARS;

/*fall through */

case XYERRORLINES:

case XYERRORBARS:

case BOXXYERROR:

store2d_point(current_plot, i++, v[0], v[1], v[2], v[3], v[4],

v[5], 0.0);

break;

}

} /*switch */

} /*while */

current_plot->p_count = i;

cp_extend(current_plot, i); /* shrink to fit */

df_close();

return i; /* i==0 indicates an 'empty' file */

}

/* called by get_data for each point */

static void

store2d_point(current_plot, i, x, y, xlow, xhigh, ylow, yhigh, width)

struct curve_points *current_plot;

int i; /* point number */

double x, y;

double ylow, yhigh;

double xlow, xhigh;

double width; /* -1 means autocalc, 0 means use xmin/xmax */

{

struct coordinate GPHUGE *cp = &(current_plot->points[i]);

int dummy_type = INRANGE; /* sometimes we dont care about outranging */

/* jev -- pass data values thru user-defined function */

/* div -- y is dummy variable 2 - copy value there */

if (ydata_func.at) {

struct value val;

(void) Gcomplex(&ydata_func.dummy_values[0], y, 0.0);

ydata_func.dummy_values[2] = ydata_func.dummy_values[0];

evaluate_at(ydata_func.at, &val);

y = undefined ? 0.0 : real(&val);

(void) Gcomplex(&ydata_func.dummy_values[0], ylow, 0.0);

ydata_func.dummy_values[2] = ydata_func.dummy_values[0];

evaluate_at(ydata_func.at, &val);

ylow = undefined ? 0 : real(&val);

(void) Gcomplex(&ydata_func.dummy_values[0], yhigh, 0.0);

ydata_func.dummy_values[2] = ydata_func.dummy_values[0];

evaluate_at(ydata_func.at, &val);

yhigh = undefined ? 0 : real(&val);

}

dummy_type = cp->type = INRANGE;

if (polar) {

double newx, newy;

if (!(autoscale_r & 2) && y > rmax) {

cp->type = OUTRANGE;

}

if (!(autoscale_r & 1)) {

/* we store internally as if plotting r(t)-rmin */

y -= rmin;

}

newx = y * cos(x * ang2rad);

newy = y * sin(x * ang2rad);

#if 0 /* HBB 981118: added polar errorbars */

/* only lines and points supported with polar */

y = ylow = yhigh = newy;

x = xlow = xhigh = newx;

#else

y = newy;

x = newx;

if (!(autoscale_r & 2) && yhigh > rmax) {

cp->type = OUTRANGE;

}

if (!(autoscale_r & 1)) {

/* we store internally as if plotting r(t)-rmin */

yhigh -= rmin;

}

newx = yhigh * cos(xhigh * ang2rad);

newy = yhigh * sin(xhigh * ang2rad);

yhigh = newy;

xhigh = newx;

if (!(autoscale_r & 2) && ylow > rmax) {

cp->type = OUTRANGE;

}

if (!(autoscale_r & 1)) {

/* we store internally as if plotting r(t)-rmin */

ylow -= rmin;

}

newx = ylow * cos(xlow * ang2rad);

newy = ylow * sin(xlow * ang2rad);

ylow = newy;

xlow = newx;

#endif

}

/* return immediately if x or y are undefined

* we dont care if outrange for high/low.

* BUT if high/low undefined (ie log( < 0 ), no number is stored,

* but graphics.c doesn't know.

* explicitly store -VERYLARGE;

STORE_WITH_LOG_AND_FIXUP_RANGE(cp->x, x, cp->type, current_plot->x_axis, NOOP, return);

STORE_WITH_LOG_AND_FIXUP_RANGE(cp->xlow, xlow, dummy_type, current_plot->x_axis, NOOP, cp->xlow = -VERYLARGE);

STORE_WITH_LOG_AND_FIXUP_RANGE(cp->xhigh, xhigh, dummy_type, current_plot->x_axis, NOOP, cp->xhigh = -VERYLARGE);

STORE_WITH_LOG_AND_FIXUP_RANGE(cp->y, y, cp->type, current_plot->y_axis, NOOP, return);

STORE_WITH_LOG_AND_FIXUP_RANGE(cp->ylow, ylow, dummy_type, current_plot->y_axis, NOOP, cp->ylow = -VERYLARGE);

STORE_WITH_LOG_AND_FIXUP_RANGE(cp->yhigh, yhigh, dummy_type, current_plot->y_axis, NOOP, cp->yhigh = -VERYLARGE);

cp->z = width;

} /* store2d_point */

* print_points: a debugging routine to print out the points of a curve, and

* the curve structure. If curve<0, then we print the list of curves.

#if 0 /* not used */

static char *plot_type_names[4] =

{

"Function", "Data", "3D Function", "3d data"

};

static char *plot_style_names[14] =

{

"Lines", "Points", "Impulses", "LinesPoints", "Dots", "XErrorbars",

"YErrorbars", "XYErrorbars", "BoxXYError", "Boxes", "Boxerror", "Steps",

"FSteps", "Vector",

"XErrorlines", "YErrorlines", "XYErrorlines"

};

static char *plot_smooth_names[5] =

{

"None", "Unique", "CSplines", "ACSplines", "Bezier", "SBezier"

};

static void

print_points(curve)

int curve; /* which curve to print */

{

int i;

if (curve < 0) {

for (this_plot = first_plot, i = 0;

this_plot != NULL;

i++, this_plot = this_plot->next) {

printf("Curve %d:\n", i);

if ((int) this_plot->plot_type >= 0 && (int) (this_plot->plot_type) < 4)

printf("Plot type %d: %s\n", (int) (this_plot->plot_type),

plot_type_names[(int) (this_plot->plot_type)]);

else

printf("Plot type %d: BAD\n", (int) (this_plot->plot_type));

if ((int) this_plot->plot_style >= 0 && (int) (this_plot->plot_style) < 14)

printf("Plot style %d: %s\n", (int) (this_plot->plot_style),

plot_style_names[(int) (this_plot->plot_style)]);

else

printf("Plot style %d: BAD\n", (int) (this_plot->plot_style));

if ((int) this_plot->plot_smooth >= 0 && (int) (this_plot->plot_smooth) < 6)

printf("Plot smooth style %d: %s\n", (int) (this_plot->plot_style),

plot_smooth_names[(int) (this_plot->plot_smooth)]);

else

printf("Plot smooth style %d: BAD\n", (int) (this_plot->plot_smooth));

printf("\

Plot title: '%s'\n\

Line type %d\n\

Point type %d\n\

max points %d\n\

current points %d\n\n",

this_plot->title,

this_plot->line_type,

this_plot->point_type,

this_plot->p_max,

this_plot->p_count);

}

} else {

for (this_plot = first_plot, i = 0;

i < curve && this_plot != NULL;

i++, this_plot = this_plot->next);

if (this_plot == NULL)

printf("Curve %d does not exist; list has %d curves\n", curve, i);

else {

printf("Curve %d, %d points\n", curve, this_plot->p_count);

for (i = 0; i < this_plot->p_count; i++) {

printf("%c x=%g y=%g z=%g xlow=%g xhigh=%g ylow=%g yhigh=%g\n",

this_plot->points[i].type == INRANGE ? 'i'

: this_plot->points[i].type == OUTRANGE ? 'o'

: 'u',

this_plot->points[i].x,

this_plot->points[i].y,

this_plot->points[i].z,

this_plot->points[i].xlow,

this_plot->points[i].xhigh,

this_plot->points[i].ylow,

this_plot->points[i].yhigh);

}

printf("\n");

}

#endif /* not used */

static void

print_table(current_plot, plot_num)

struct curve_points *current_plot;

int plot_num;

{

int i, curve;

char *table_format = NULL;

/* The data format is determined by the format of the axis labels.

* See 'set format'. Patch by Don Taber

table_format = gp_alloc(strlen(xformat)+strlen(yformat)+5, "table format");

strcpy(table_format, xformat);

strcat(table_format, " ");

strcat(table_format, yformat);

strcat(table_format, " %c\n");

for (curve = 0; curve < plot_num;

curve++, current_plot = current_plot->next) {

fprintf(gpoutfile, "#Curve %d, %d points\n#x y",

curve, current_plot->p_count);

switch (current_plot->plot_style) {

case BOXES:

case XERRORBARS:

fprintf(gpoutfile, " xlow xhigh");

break;

case BOXERROR:

case YERRORBARS:

fprintf(gpoutfile, " ylow yhigh");

break;

case BOXXYERROR:

case XYERRORBARS:

fprintf(gpoutfile, " xlow xhigh ylow yhigh");

break;

case FINANCEBARS:

case CANDLESTICKS:

default:

/* ? */

break;

}

fprintf(gpoutfile, " type\n");

for (i = 0; i < current_plot->p_count; i++) {

fprintf(gpoutfile, "%g %g",

current_plot->points[i].x,

current_plot->points[i].y);

switch (current_plot->plot_style) {

case BOXES:

case XERRORBARS:

fprintf(gpoutfile, " %g %g",

current_plot->points[i].xlow,

current_plot->points[i].xhigh);

break;

case BOXERROR:

case YERRORBARS:

fprintf(gpoutfile, " %g %g",

current_plot->points[i].ylow,

current_plot->points[i].yhigh);

break;

case BOXXYERROR:

case XYERRORBARS:

fprintf(gpoutfile, " %g %g %g %g",

current_plot->points[i].xlow,

current_plot->points[i].xhigh,

current_plot->points[i].ylow,

current_plot->points[i].yhigh);

break;

case FINANCEBARS:

case CANDLESTICKS:

default:

/* ? */

break;

}

fprintf(gpoutfile, " %c\n",

current_plot->points[i].type == INRANGE ? 'i'

: current_plot->points[i].type == OUTRANGE ? 'o'

: 'u');

}

fputc('\n', gpoutfile);

}

/* two blank lines between plots in table output */

fputc('\n', gpoutfile);

fflush(gpoutfile);

free(table_format);

}

* This parses the plot command after any range specifications. To support

* autoscaling on the x axis, we want any data files to define the x range,

* then to plot any functions using that range. We thus parse the input

* twice, once to pick up the data files, and again to pick up the functions.

* Definitions are processed twice, but that won't hurt.

* div - okay, it doesn't hurt, but every time an option as added for

* datafiles, code to parse it has to be added here. Change so that

* we store starting-token in the plot structure.

static void

eval_plots()

{

int some_functions = 0;

int plot_num, line_num, point_num, xparam = 0;

char *xtitle = NULL;

int begin_token = c_token; /* so we can rewind for second pass */

int uses_axis[AXIS_ARRAY_SIZE];

uses_axis[FIRST_X_AXIS] =

uses_axis[FIRST_Y_AXIS] =

uses_axis[SECOND_X_AXIS] =

uses_axis[SECOND_Y_AXIS] = 0;

/* Reset first_plot. This is usually done at the end of this function.

* If there is an error within this function, the memory is left allocated,

* since we cannot call cp_free if the list is incomplete. Making sure that

* the list structure is always vaild requires some rewriting */

first_plot = NULL;

tp_ptr = &(first_plot);

plot_num = 0;

line_num = 0; /* default line type */

point_num = 0; /* default point type */

/*** First Pass: Read through data files ***

* This pass serves to set the xrange and to parse the command, as well

* as filling in every thing except the function data. That is done after

* the xrange is defined.

while (TRUE) {

if (END_OF_COMMAND)

int_error(c_token, "function to plot expected");

if (is_definition(c_token)) {

define();

} else {

int x_axis = 0, y_axis = 0;

int specs = 0;

/* for datafile plot, record datafile spec for title */

int start_token = c_token, end_token;

plot_num++;

if (isstring(c_token)) { /* data file to plot */

if (parametric && xparam)

int_error(c_token, "previous parametric function not fully specified");

if (*tp_ptr)

this_plot = *tp_ptr;

else { /* no memory malloc()'d there yet */

this_plot = cp_alloc(MIN_CRV_POINTS);

*tp_ptr = this_plot;

}

this_plot->plot_type = DATA;

this_plot->plot_style = data_style;

this_plot->plot_smooth = SMOOTH_NONE;

specs = df_open(NCOL); /* up to NCOL cols */

/* this parses data-file-specific modifiers only */

/* we'll sort points when we know style, if necessary */

if (df_binary)

int_error(c_token, "2d binary files not yet supported");

/* include modifiers in default title */

this_plot->token = end_token = c_token - 1;

} else {

/* function to plot */

some_functions = 1;

if (parametric) /* working on x parametric function */

xparam = 1 - xparam;

if (*tp_ptr) {

this_plot = *tp_ptr;

cp_extend(this_plot, samples + 1);

} else { /* no memory malloc()'d there yet */

this_plot = cp_alloc(samples + 1);

*tp_ptr = this_plot;

}

this_plot->plot_type = FUNC;

this_plot->plot_style = func_style;

dummy_func = &plot_func;

plot_func.at = temp_at();

dummy_func = NULL;

/* ignore it for now */

end_token = c_token - 1;

} /* end of IS THIS A FILE OR A FUNC block */

/* axis defaults */

x_axis = FIRST_X_AXIS;

y_axis = FIRST_Y_AXIS;

/* deal with smooth */

if (almost_equals(c_token, "s$mooth")) {

c_token++;

switch(lookup_table(&plot_smooth_tbl[0],c_token)) {

case SMOOTH_ACSPLINES:

this_plot->plot_smooth = SMOOTH_ACSPLINES;

break;

case SMOOTH_BEZIER:

this_plot->plot_smooth = SMOOTH_BEZIER;

break;

case SMOOTH_CSPLINES:

this_plot->plot_smooth = SMOOTH_CSPLINES;

break;

case SMOOTH_SBEZIER:

this_plot->plot_smooth = SMOOTH_SBEZIER;

break;

case SMOOTH_UNIQUE:

this_plot->plot_smooth = SMOOTH_UNIQUE;

break;

case SMOOTH_NONE:

default:

int_error(c_token, "expecting 'unique', 'acsplines', 'csplines', 'bezier' or 'sbezier'");

break;

}

this_plot->plot_style = LINES;

c_token++; /* skip format */

}

/* look for axes/axis */

if (almost_equals(c_token, "ax$es") || almost_equals(c_token, "ax$is")) {

if (parametric && xparam)

int_error(c_token, "previous parametric function not fully specified");

c_token++;

switch(lookup_table(&plot_axes_tbl[0],c_token)) {

case AXES_X1Y1:

x_axis = FIRST_X_AXIS;

y_axis = FIRST_Y_AXIS;

++c_token;

break;

case AXES_X2Y2:

x_axis = SECOND_X_AXIS;

y_axis = SECOND_Y_AXIS;

++c_token;

break;

case AXES_X1Y2:

x_axis = FIRST_X_AXIS;

y_axis = SECOND_Y_AXIS;

++c_token;

break;

case AXES_X2Y1:

x_axis = SECOND_X_AXIS;

y_axis = FIRST_Y_AXIS;

++c_token;

break;

View remainder of file in raw view

gnuplot-old/src/plot2d.c at pm3d · gnuplot/gnuplot-old · GitHub

Repository navigation

Expand file tree

Breadcrumbs

plot2d.c

Latest commit

History

Breadcrumbs

plot2d.c

File metadata and controls