gnuplot/src/plot3d.c at branch-4-0-stable · gnuplot/gnuplot · GitHub

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#ifndef lint

static char *RCSid() { return RCSid("$Id: plot3d.c,v 1.68 2004/06/30 20:01:56 broeker Exp $"); }

#endif

/* GNUPLOT - plot3d.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 "plot3d.h"

#include "gp_types.h"

#include "alloc.h"

#include "axis.h"

#include "binary.h"

#include "command.h"

#include "contour.h"

#include "datafile.h"

#include "eval.h"

#include "graph3d.h"

#include "misc.h"

#include "parse.h"

#include "term_api.h"

#include "util.h"

#ifdef PM3D

# include "pm3d.h"

#endif

#ifdef THIN_PLATE_SPLINES_GRID

# include "matrix.h"

#endif

#ifndef _Windows

# include "help.h"

#endif

/* global variables exported by this module */

t_data_mapping mapping3d = MAP3D_CARTESIAN;

int dgrid3d_row_fineness = 10;

int dgrid3d_col_fineness = 10;

int dgrid3d_norm_value = 1;

TBOOLEAN dgrid3d = FALSE;

int plot_has_palette = 0;

/* static prototypes */

#ifdef PM3D

static void set_plot_with_palette __PROTO((int plot_num));

#endif

static void calculate_set_of_isolines __PROTO((AXIS_INDEX value_axis, TBOOLEAN cross, struct iso_curve **this_iso,

AXIS_INDEX iso_axis, double iso_min, double iso_step, int num_iso_to_use,

AXIS_INDEX sam_axis, double sam_min, double sam_step, int num_sam_to_use,

TBOOLEAN need_palette));

static void get_3ddata __PROTO((struct surface_points * this_plot));

static void print_3dtable __PROTO((int pcount));

static void eval_3dplots __PROTO((void));

static void grid_nongrid_data __PROTO((struct surface_points * this_plot));

static void parametric_3dfixup __PROTO((struct surface_points * start_plot, int *plot_num));

static struct surface_points * sp_alloc __PROTO((int num_samp_1, int num_iso_1, int num_samp_2, int num_iso_2));

static void sp_replace __PROTO((struct surface_points *sp, int num_samp_1, int num_iso_1, int num_samp_2, int num_iso_2));

#ifdef THIN_PLATE_SPLINES_GRID

static double splines_kernel __PROTO((double h));

#endif

/* the curves/surfaces of the plot */

struct surface_points *first_3dplot = NULL;

static struct udft_entry plot_func;

int plot3d_num=0;

/* HBB 20000508: moved these functions to the only module that uses them

* so they can be turned 'static' */

* sp_alloc() allocates a surface_points structure that can hold 'num_iso_1'

* iso-curves with 'num_samp_2' samples and 'num_iso_2' iso-curves with

* 'num_samp_1' samples.

* If, however num_iso_2 or num_samp_1 is zero no iso curves are allocated.

static struct surface_points *

sp_alloc(int num_samp_1, int num_iso_1, int num_samp_2, int num_iso_2)

{

struct surface_points *sp = gp_alloc(sizeof(*sp), "surface");

sp->next_sp = NULL;

sp->title = NULL;

sp->contours = NULL;

sp->iso_crvs = NULL;

sp->num_iso_read = 0;

#ifdef PM3D

sp->pm3d_color_from_column = FALSE;

sp->pm3d_where[0] = 0;

#endif

if (num_iso_2 > 0 && num_samp_1 > 0) {

int i;

struct iso_curve *icrv;

for (i = 0; i < num_iso_1; i++) {

icrv = iso_alloc(num_samp_2);

icrv->next = sp->iso_crvs;

sp->iso_crvs = icrv;

}

for (i = 0; i < num_iso_2; i++) {

icrv = iso_alloc(num_samp_1);

icrv->next = sp->iso_crvs;

sp->iso_crvs = icrv;

}

} else

sp->iso_crvs = NULL;

return (sp);

}

* sp_replace() updates a surface_points structure so it can hold 'num_iso_1'

* iso-curves with 'num_samp_2' samples and 'num_iso_2' iso-curves with

* 'num_samp_1' samples.

* If, however num_iso_2 or num_samp_1 is zero no iso curves are allocated.

static void

sp_replace(

struct surface_points *sp,

int num_samp_1, int num_iso_1, int num_samp_2, int num_iso_2)

{

int i;

struct iso_curve *icrv, *icrvs = sp->iso_crvs;

while (icrvs) {

icrv = icrvs;

icrvs = icrvs->next;

iso_free(icrv);

}

sp->iso_crvs = NULL;

if (num_iso_2 > 0 && num_samp_1 > 0) {

for (i = 0; i < num_iso_1; i++) {

icrv = iso_alloc(num_samp_2);

icrv->next = sp->iso_crvs;

sp->iso_crvs = icrv;

}

for (i = 0; i < num_iso_2; i++) {

icrv = iso_alloc(num_samp_1);

icrv->next = sp->iso_crvs;

sp->iso_crvs = icrv;

}

} else

sp->iso_crvs = NULL;

}

* sp_free() releases any memory which was previously malloc()'d to hold

* surface points.

/* HBB 20000506: don't risk stack havoc by recursion, use iterative list

* cleanup unstead */

void

sp_free(struct surface_points *sp)

{

while (sp) {

struct surface_points *next = sp->next_sp;

if (sp->title)

free(sp->title);

while (sp->contours) {

struct gnuplot_contours *next_cntrs = sp->contours->next;

free(sp->contours->coords);

free(sp->contours);

sp->contours = next_cntrs;

}

while (sp->iso_crvs) {

struct iso_curve *next_icrvs = sp->iso_crvs->next;

iso_free(sp->iso_crvs);

sp->iso_crvs = next_icrvs;

}

free(sp);

sp = next;

}

/* support for dynamic size of input line */

void

plot3drequest()

* in the parametric case we would say splot [u= -Pi:Pi] [v= 0:2*Pi] [-1:1]

* [-1:1] [-1:1] sin(v)*cos(u),sin(v)*cos(u),sin(u) in the non-parametric

* case we would say only splot [x= -2:2] [y= -5:5] sin(x)*cos(y)

{

int dummy_token0 = -1, dummy_token1 = -1;

AXIS_INDEX u_axis, v_axis;

is_3d_plot = TRUE;

/* change view to become map if requested by 'set view map' */

if (splot_map == TRUE)

splot_map_activate();

if (parametric && strcmp(set_dummy_var[0], "t") == 0) {

strcpy(set_dummy_var[0], "u");

strcpy(set_dummy_var[1], "v");

}

/* put stuff into arrays to simplify access */

AXIS_INIT3D(FIRST_X_AXIS, 0, 0);

AXIS_INIT3D(FIRST_Y_AXIS, 0, 0);

AXIS_INIT3D(FIRST_Z_AXIS, 0, 1);

AXIS_INIT3D(U_AXIS, 1, 0);

AXIS_INIT3D(V_AXIS, 1, 0);

#ifdef PM3D

AXIS_INIT3D(COLOR_AXIS, 0, 1);

#endif

if (!term) /* unknown */

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

u_axis = (parametric ? U_AXIS : FIRST_X_AXIS);

v_axis = (parametric ? V_AXIS : FIRST_Y_AXIS);

PARSE_NAMED_RANGE(u_axis, dummy_token0);

PARSE_NAMED_RANGE(v_axis, dummy_token1);

if (parametric) {

PARSE_RANGE(FIRST_X_AXIS);

PARSE_RANGE(FIRST_Y_AXIS);

} /* parametric */

PARSE_RANGE(FIRST_Z_AXIS);

CHECK_REVERSE(FIRST_X_AXIS);

CHECK_REVERSE(FIRST_Y_AXIS);

CHECK_REVERSE(FIRST_Z_AXIS);

/* use the default dummy variable unless changed */

if (dummy_token0 >= 0)

copy_str(c_dummy_var[0], dummy_token0, MAX_ID_LEN);

else

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

if (dummy_token1 >= 0)

copy_str(c_dummy_var[1], dummy_token1, MAX_ID_LEN);

else

(void) strcpy(c_dummy_var[1], set_dummy_var[1]);

eval_3dplots();

}

#ifdef THIN_PLATE_SPLINES_GRID

static double

splines_kernel(double h)

{

#if 0

/* this is normaly not useful ... */

h = fabs(h);

if (h != 0.0) {

#else

if (h > 0) {

#endif

return h * h * log(h);

} else {

return 0;

}

#endif

#ifdef PM3D

/* Set flag plot_has_palette to 1 if there is any element on the graph

* which requires palette of continuous colors.

static void

set_plot_with_palette(int plot_num)

{

struct surface_points *this_plot = first_3dplot;

int surface = 0;

struct text_label *this_label = first_label;

plot_has_palette = 1;

/* Is pm3d switched on globally? */

if (pm3d.where[0])

return;

/* Any surface 'with pm3d' or 'with line|dot palette'? */

while (surface < plot_num) {

if (this_plot->lp_properties.use_palette)

return;

this_plot = this_plot->next_sp;

surface++;

}

/* Any label with 'textcolor palette'? */

#define TC_USES_PALETTE(tctype) (tctype==TC_Z) || (tctype==TC_CB) || (tctype==TC_FRAC)

for (; this_label != NULL; this_label = this_label->next) {

if (TC_USES_PALETTE(this_label->textcolor.type))

return;

}

/* Any of title, xlabel, ylabel, zlabel, ... with 'textcolor palette'? */

if (TC_USES_PALETTE(title.textcolor.type)) return;

if (TC_USES_PALETTE(axis_array[FIRST_X_AXIS].label.textcolor.type)) return;

if (TC_USES_PALETTE(axis_array[FIRST_Y_AXIS].label.textcolor.type)) return;

if (TC_USES_PALETTE(axis_array[FIRST_Z_AXIS].label.textcolor.type)) return;

if (TC_USES_PALETTE(axis_array[COLOR_AXIS].label.textcolor.type)) return;

if (TC_USES_PALETTE(axis_array[SECOND_X_AXIS].label.textcolor.type)) return;

if (TC_USES_PALETTE(axis_array[SECOND_Y_AXIS].label.textcolor.type)) return;

#undef TC_USES_PALETTE

/* Palette with continuous colors is not used. */

plot_has_palette = 0;

}

int

is_plot_with_palette()

{

return plot_has_palette;

}

#endif

static void

grid_nongrid_data(struct surface_points *this_plot)

{

int i, j, k;

double x, y, z, w, dx, dy, xmin, xmax, ymin, ymax;

struct iso_curve *old_iso_crvs = this_plot->iso_crvs;

struct iso_curve *icrv, *oicrv, *oicrvs;

#ifdef THIN_PLATE_SPLINES_GRID

double *b, **K, *xx, *yy, *zz, d;

int *indx, numpoints;

#endif

/* Compute XY bounding box on the original data. */

/* FIXME HBB 20010424: Does this make any sense? Shouldn't we just

* use whatever the x and y ranges have been found to be, and

* that's that? The largest difference this is going to make is if

* we plot a datafile that doesn't span the whole x/y range

* used. Do we want a dgrid3d over the actual data rectangle, or

* over the xrange/yrange area? */

xmin = xmax = old_iso_crvs->points[0].x;

ymin = ymax = old_iso_crvs->points[0].y;

for (icrv = old_iso_crvs; icrv != NULL; icrv = icrv->next) {

struct coordinate GPHUGE *points = icrv->points;

for (i = 0; i < icrv->p_count; i++, points++) {

/* HBB 20010424: avoid crashing for undefined input */

if (points->type == UNDEFINED)

continue;

if (xmin > points->x)

xmin = points->x;

if (xmax < points->x)

xmax = points->x;

if (ymin > points->y)

ymin = points->y;

if (ymax < points->y)

ymax = points->y;

}

dx = (xmax - xmin) / (dgrid3d_col_fineness - 1);

dy = (ymax - ymin) / (dgrid3d_row_fineness - 1);

/* Create the new grid structure, and compute the low pass filtering from

* non grid to grid structure.

this_plot->iso_crvs = NULL;

this_plot->num_iso_read = dgrid3d_col_fineness;

this_plot->has_grid_topology = TRUE;

#ifdef THIN_PLATE_SPLINES_GRID

numpoints = 0;

for (oicrv = old_iso_crvs; oicrv != NULL; oicrv = oicrv->next) {

numpoints += oicrv->p_count;

}

xx = gp_alloc(sizeof(xx[0]) * (numpoints + 3) * (numpoints + 8),

"thin plate splines in dgrid3d");

/* the memory needed is not really (n+3)*(n+8) for now,

but might be if I take into account errors ... */

K = gp_alloc(sizeof(K[0]) * (numpoints + 3),

"matrix : thin plate splines 2d");

yy = xx + numpoints;

zz = yy + numpoints;

b = zz + numpoints;

/* HBB 20010424: Count actual input points without the UNDEFINED

* ones, as we copy them */

numpoints = 0;

for (oicrv = old_iso_crvs; oicrv != NULL; oicrv = oicrv->next) {

struct coordinate GPHUGE *opoints = oicrv->points;

for (k = 0; k < oicrv->p_count; k++, opoints++) {

/* HBB 20010424: avoid crashing for undefined input */

if (opoints->type == UNDEFINED)

continue;

xx[numpoints] = opoints->x;

yy[numpoints] = opoints->y;

zz[numpoints] = opoints->z;

numpoints++;

}

for (i = 0; i < numpoints + 3; i++) {

K[i] = b + (numpoints + 3) * (i + 1);

}

for (i = 0; i < numpoints; i++) {

for (j = i + 1; j < numpoints; j++) {

double dx = xx[i] - xx[j], dy = yy[i] - yy[j];

K[i][j] = K[j][i] = -splines_kernel(sqrt(dx * dx + dy * dy));

}

K[i][i] = 0.0; /* here will come the weights for errors */

b[i] = zz[i];

}

for (i = 0; i < numpoints; i++) {

K[i][numpoints] = K[numpoints][i] = 1.0;

K[i][numpoints + 1] = K[numpoints + 1][i] = xx[i];

K[i][numpoints + 2] = K[numpoints + 2][i] = yy[i];

}

b[numpoints] = 0.0;

b[numpoints + 1] = 0.0;

b[numpoints + 2] = 0.0;

K[numpoints][numpoints] = 0.0;

K[numpoints][numpoints + 1] = 0.0;

K[numpoints][numpoints + 2] = 0.0;

K[numpoints + 1][numpoints] = 0.0;

K[numpoints + 1][numpoints + 1] = 0.0;

K[numpoints + 1][numpoints + 2] = 0.0;

K[numpoints + 2][numpoints] = 0.0;

K[numpoints + 2][numpoints + 1] = 0.0;

K[numpoints + 2][numpoints + 2] = 0.0;

indx = gp_alloc(sizeof(indx[0]) * (numpoints + 3), "indexes lu");

/* actually, K is *not* positive definite, but

has only non zero real eigenvalues ->

we can use an lu_decomp safely */

lu_decomp(K, numpoints + 3, indx, &d);

lu_backsubst(K, numpoints + 3, indx, b);

#endif /* THIN_PLATE_SPLINES_GRID */

for (i = 0, x = xmin; i < dgrid3d_col_fineness; i++, x += dx) {

struct coordinate GPHUGE *points;

icrv = iso_alloc(dgrid3d_row_fineness + 1);

icrv->p_count = dgrid3d_row_fineness;

icrv->next = this_plot->iso_crvs;

this_plot->iso_crvs = icrv;

points = icrv->points;

for (j = 0, y = ymin; j < dgrid3d_row_fineness; j++, y += dy, points++) {

z = w = 0.0;

/* as soon as ->type is changed to UNDEFINED, break out of

* two inner loops! */

points->type = INRANGE;

#ifdef THIN_PLATE_SPLINES_GRID

z = b[numpoints];

for (k = 0; k < numpoints; k++) {

double dx = xx[k] - x, dy = yy[k] - y;

z = z - b[k] * splines_kernel(sqrt(dx * dx + dy * dy));

}

z = z + b[numpoints + 1] * x + b[numpoints + 2] * y;

#else

for (oicrv = old_iso_crvs; oicrv != NULL; oicrv = oicrv->next) {

struct coordinate GPHUGE *opoints = oicrv->points;

for (k = 0; k < oicrv->p_count; k++, opoints++) {

double dist, dist_x = fabs(opoints->x - x), dist_y = fabs(opoints->y - y);

switch (dgrid3d_norm_value) {

case 1:

dist = dist_x + dist_y;

break;

case 2:

dist = dist_x * dist_x + dist_y * dist_y;

break;

case 4:

dist = dist_x * dist_x + dist_y * dist_y;

dist *= dist;

break;

case 8:

dist = dist_x * dist_x + dist_y * dist_y;

dist *= dist;

break;

case 16:

dist = dist_x * dist_x + dist_y * dist_y;

dist *= dist;

break;

default:

dist = pow(dist_x, (double) dgrid3d_norm_value) +

pow(dist_y, (double) dgrid3d_norm_value);

break;

}

/* The weight of this point is inverse proportional

* to the distance.

if (dist == 0.0) {

/* HBB 981209: revised flagging as undefined */

/* Supporting all those infinities on various

* platforms becomes tiresome, to say the least :-(

* Let's just return the first z where this happens,

* unchanged, and be done with this, period. */

points->type = UNDEFINED;

z = opoints->z;

w = 1.0;

break; /* out of inner loop */

} else {

dist = 1.0 / dist;

z += opoints->z * dist;

w += dist;

}

if (points->type != INRANGE)

break; /* out of the second-inner loop as well ... */

}

#endif /* THIN_PLATE_SPLINES_GRID */

/* Now that we've escaped the loops safely, we know that we

* do have a good value in z and w, so we can proceed just as

* if nothing had happened at all. Nice, isn't it? */

points->type = INRANGE;

/* HBB 20010424: if log x or log y axis, we don't want to

* log() the value again --> just store it, and trust that

* it's always inrange */

points->x = x;

points->y = y;

#ifndef THIN_PLATE_SPLINES_GRID

z = z / w;

#endif

STORE_WITH_LOG_AND_UPDATE_RANGE(points->z, z, points->type, z_axis, NOOP, continue);

#ifdef PM3D

if (this_plot->pm3d_color_from_column)

int_error(NO_CARET, "Gridding of the color column is not implemented");

else {

COLOR_STORE_WITH_LOG_AND_UPDATE_RANGE(points->CRD_COLOR, z, points->type, COLOR_AXIS, NOOP, continue);

}

#endif

}

#ifdef THIN_PLATE_SPLINES_GRID

free(K);

free(xx);

free(indx);

#endif

/* Delete the old non grid data. */

for (oicrvs = old_iso_crvs; oicrvs != NULL;) {

oicrv = oicrvs;

oicrvs = oicrvs->next;

iso_free(oicrv);

}

/* Get 3D data from file, and store into this_plot data

* structure. Takes care of 'set mapping' and 'set dgrid3d'.

* Notice: this_plot->token is end of datafile spec, before title etc

* will be moved past title etc after we return */

static void

get_3ddata(struct surface_points *this_plot)

{

int xdatum = 0;

int ydatum = 0;

int j;

#ifdef PM3D

double v[4];

#else

double v[3];

#endif

int pt_in_iso_crv = 0;

struct iso_curve *this_iso;

if (mapping3d == MAP3D_CARTESIAN) {

#ifndef PM3D

/* do this check only, if we have PM3D / PM3D-COLUMN not compiled in */

if (df_no_use_specs == 2)

int_error(this_plot->token, "Need 1 or 3 columns for cartesian data");

#endif

} else {

if (df_no_use_specs == 1)

int_error(this_plot->token, "Need 2 or 3 columns for polar data");

}

this_plot->num_iso_read = 0;

this_plot->has_grid_topology = TRUE;

#ifdef PM3D

this_plot->pm3d_color_from_column = FALSE;

#endif

/* we ought to keep old memory - most likely case

* is a replot, so it will probably exactly fit into

* memory already allocated ?

if (this_plot->iso_crvs != NULL) {

struct iso_curve *icrv, *icrvs = this_plot->iso_crvs;

while (icrvs) {

icrv = icrvs;

icrvs = icrvs->next;

iso_free(icrv);

}

this_plot->iso_crvs = NULL;

}

/* data file is already open */

if (df_matrix)

xdatum = df_3dmatrix(this_plot, NEED_PALETTE(this_plot));

else {

/*{{{ read surface from text file */

struct iso_curve *local_this_iso = iso_alloc(samples_1);

struct coordinate GPHUGE *cp;

double x, y, z;

#ifdef PM3D

double color = VERYLARGE;

int pm3d_color_from_column = FALSE;

#endif

while ((j = df_readline(v,

#ifdef PM3D

/* currently pm3d mapping is only implemented for

* MAP3D_CARTESIAN; and it is used if the 4th column is

* explicitly given */

(MAP3D_CARTESIAN

== mapping3d && df_no_use_specs==4)

? 4 : 3

#else

#endif /* PM3D */

)) != DF_EOF) {

if (j == DF_SECOND_BLANK)

break; /* two blank lines */

if (j == DF_FIRST_BLANK) {

/* one blank line */

if (pt_in_iso_crv == 0) {

if (xdatum == 0)

continue;

pt_in_iso_crv = xdatum;

}

if (xdatum > 0) {

local_this_iso->p_count = xdatum;

local_this_iso->next = this_plot->iso_crvs;

this_plot->iso_crvs = local_this_iso;

this_plot->num_iso_read++;

if (xdatum != pt_in_iso_crv)

this_plot->has_grid_topology = FALSE;

local_this_iso = iso_alloc(pt_in_iso_crv);

xdatum = 0;

ydatum++;

}

continue;

}

/* its a data point or undefined */

if (xdatum >= local_this_iso->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.

iso_extend(local_this_iso,

xdatum + (xdatum < 1000 ? xdatum : 1000));

}

cp = local_this_iso->points + xdatum;

if (j == DF_UNDEFINED || j == DF_MISSING) {

cp->type = UNDEFINED;

continue;

}

cp->type = INRANGE; /* unless we find out different */

switch (mapping3d) {

case MAP3D_CARTESIAN:

switch (j) {

#ifdef PM3D

case 2:

if (PM3DSURFACE != this_plot->plot_style) {

int_error(this_plot->token,

"2 columns only possible with explicit pm3d style (line %d)",

df_line_number);

return;

} else {

pm3d_color_from_column = TRUE;

color = v[1];

}

/* FALLTHRU */

#endif

case 1:

x = xdatum;

y = ydatum;

z = v[0];

break;

#ifdef PM3D

case 4:

if (df_no_use_specs==4) {

/* getting color from an explicitly given 4th column */

pm3d_color_from_column = TRUE;

x = v[0];

y = v[1];

z = v[2];

color = v[3];

break;

}

/* else FALLTHRU into the error message in default: */

#endif /* PM3D */

case 3:

x = v[0];

y = v[1];

z = v[2];

if (df_no_use_specs==0 || df_no_use_specs==3) /* because of FALLTHRU from case 4 */

break;

default:

{

int_error(this_plot->token,

"Wrong number of columns in input data - line %d",

df_line_number);

return; /* avoid gcc -Wuninitialised for x,y,z */

}

break;

case MAP3D_SPHERICAL:

/* TODO: pm3d color? (joze) 18 Dez 2000 */

if (j < 2)

int_error(this_plot->token, "Need 2 or 3 columns");

if (j < 3)

v[2] = 1; /* default radius */

/* Convert to radians. */

v[0] *= ang2rad;

v[1] *= ang2rad;

x = v[2] * cos(v[0]) * cos(v[1]);

y = v[2] * sin(v[0]) * cos(v[1]);

z = v[2] * sin(v[1]);

break;

case MAP3D_CYLINDRICAL:

/* TODO: pm3d color? (joze) 18 Dez 2000 */

if (j < 2)

int_error(this_plot->token, "Need 2 or 3 columns");

if (j < 3)

v[2] = 1; /* default radius */

/* Convert to radians. */

v[0] *= ang2rad;

x = v[2] * cos(v[0]);

y = v[2] * sin(v[0]);

z = v[1];

break;

default:

int_error(NO_CARET, "Internal error: Unknown mapping type");

return;

}

/* adjust for logscales. Set min/max and point types.

* store in cp

cp->type = INRANGE;

/* cannot use continue, as macro is wrapped in a loop.

* I regard this as correct goto use

STORE_WITH_LOG_AND_UPDATE_RANGE(cp->x, x, cp->type, x_axis, NOOP, goto come_here_if_undefined);

STORE_WITH_LOG_AND_UPDATE_RANGE(cp->y, y, cp->type, y_axis, NOOP, goto come_here_if_undefined);

if (dgrid3d) {

/* HBB 20010424: in dgrid3d mode, delay log() taking

* and scaling until after the dgrid process. Only for

* z, not for x and y, so we can layout the newly

* created created grid more easily. */

cp->z = z;

} else {

STORE_WITH_LOG_AND_UPDATE_RANGE(cp->z, z, cp->type, z_axis, NOOP, goto come_here_if_undefined);

#ifdef PM3D

if (NEED_PALETTE(this_plot)) {

if (pm3d_color_from_column) {

COLOR_STORE_WITH_LOG_AND_UPDATE_RANGE(cp->CRD_COLOR, color, cp->type, COLOR_AXIS, NOOP, goto come_here_if_undefined);

} else {

COLOR_STORE_WITH_LOG_AND_UPDATE_RANGE(cp->CRD_COLOR, z, cp->type, COLOR_AXIS, NOOP, goto come_here_if_undefined);

}

#endif

}

/* some may complain, but I regard this as the correct use

* of goto

come_here_if_undefined:

++xdatum;

} /* end of whileloop - end of surface */

#ifdef PM3D

if (pm3d_color_from_column) {

this_plot->pm3d_color_from_column = pm3d_color_from_column;

}

#endif

if (xdatum > 0) {

this_plot->num_iso_read++; /* Update last iso. */

local_this_iso->p_count = xdatum;

local_this_iso->next = this_plot->iso_crvs;

this_plot->iso_crvs = local_this_iso;

if (xdatum != pt_in_iso_crv)

this_plot->has_grid_topology = FALSE;

} else {

iso_free(local_this_iso); /* Free last allocation. */

}

/*}}} */

}

if (dgrid3d && this_plot->num_iso_read > 0)

grid_nongrid_data(this_plot);

if (this_plot->num_iso_read <= 1)

this_plot->has_grid_topology = FALSE;

if (this_plot->has_grid_topology && !hidden3d) {

struct iso_curve *new_icrvs = NULL;

int num_new_iso = this_plot->iso_crvs->p_count, len_new_iso = this_plot->num_iso_read;

int i;

/* Now we need to set the other direction (pseudo) isolines. */

for (i = 0; i < num_new_iso; i++) {

struct iso_curve *new_icrv = iso_alloc(len_new_iso);

new_icrv->p_count = len_new_iso;

for (j = 0, this_iso = this_plot->iso_crvs;

this_iso != NULL;

j++, this_iso = this_iso->next) {

/* copy whole point struct to get type too.

* wasteful for windows, with padding */

/* more efficient would be extra pointer to same struct */

new_icrv->points[j] = this_iso->points[i];

}

new_icrv->next = new_icrvs;

new_icrvs = new_icrv;

}

/* Append the new iso curves after the read ones. */

for (this_iso = this_plot->iso_crvs;

this_iso->next != NULL;

this_iso = this_iso->next);

this_iso->next = new_icrvs;

}

static void

print_3dtable(int pcount)

{

struct surface_points *this_plot;

int i, surface;

struct coordinate GPHUGE *point;

char *buffer = gp_alloc(150, "print_3dtable output buffer");

for (surface = 0, this_plot = first_3dplot;

surface < pcount;

this_plot = this_plot->next_sp, surface++) {

fprintf(gpoutfile, "\n#Surface %d of %d surfaces\n", surface, pcount);

if (draw_surface) {

struct iso_curve *icrvs;

int curve;

/* only the curves in one direction */

for (curve = 0, icrvs = this_plot->iso_crvs;

icrvs && curve < this_plot->num_iso_read;

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

fprintf(gpoutfile, "\n#IsoCurve %d, %d points\n#x y z type\n",

curve, icrvs->p_count);

for (i = 0, point = icrvs->points;

i < icrvs->p_count;

i++, point++) {

/* HBB 20020405: new macro to use the 'set format'

* in their full flexibility */

#define OUTPUT_NUMBER(field, axis) \

gprintf(buffer, 150, axis_array[axis].formatstring, \

1.0, point->field); \

fputs(buffer, gpoutfile); \

fputc(' ', gpoutfile);

OUTPUT_NUMBER(x, FIRST_X_AXIS);

OUTPUT_NUMBER(y, FIRST_Y_AXIS);

OUTPUT_NUMBER(z, FIRST_Z_AXIS);

fprintf(gpoutfile, "%c\n",

point->type == INRANGE

? 'i' : point->type == OUTRANGE

? 'o' : 'u');

} /* for(point) */

} /* for(icrvs) */

putc('\n', gpoutfile);

} /* if(draw_surface) */

if (draw_contour) {

int number = 0;

struct gnuplot_contours *c = this_plot->contours;

while (c) {

int count = c->num_pts;

struct coordinate GPHUGE *point = c->coords;

if (c->isNewLevel)

/* don't display count - contour split across chunks */

/* put # in case user wants to use it for a plot */

/* double blank line to allow plot ... index ... */

fprintf(gpoutfile, "\n# Contour %d, label: %s\n",

number++, c->label);

for (; --count >= 0; ++point) {

OUTPUT_NUMBER(x, FIRST_X_AXIS);

OUTPUT_NUMBER(y, FIRST_Y_AXIS);

OUTPUT_NUMBER(z, FIRST_Z_AXIS);

putc('\n', gpoutfile);

}

/* blank line between segments of same contour */

putc('\n', gpoutfile);

c = c->next;

#undef OUTPUT_NUMBER

} /* while (contour) */

} /* if (draw_contour) */

} /* for(surface) */

fflush(gpoutfile);

free(buffer);

}

/* HBB 20000501: code isolated from eval_3dplots(), where practically

* identical code occured twice, for direct and crossing isolines,

* respectively. The latter only are done for in non-hidden3d

* mode. */

static void

calculate_set_of_isolines(

AXIS_INDEX value_axis,

TBOOLEAN cross,

struct iso_curve **this_iso,

AXIS_INDEX iso_axis,

double iso_min, double iso_step,

int num_iso_to_use,

AXIS_INDEX sam_axis,

double sam_min, double sam_step,

int num_sam_to_use,

TBOOLEAN need_palette)

{

int i, j;

struct coordinate GPHUGE *points = (*this_iso)->points;

#ifndef PM3D

(void) need_palette; /* Avoid -Wunused */

#endif

for (j = 0; j < num_iso_to_use; j++) {

double iso = iso_min + j * iso_step;

/* HBB 20000501: with the new code, it should

* be safe to rely on the actual 'v' axis not

* to be improperly logscaled... */

(void) Gcomplex(&plot_func.dummy_values[cross ? 0 : 1],

AXIS_DE_LOG_VALUE(iso_axis, iso), 0.0);

View remainder of file in raw view

gnuplot/src/plot3d.c at branch-4-0-stable · gnuplot/gnuplot · GitHub

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