/usr/include/gmt/gmt_contour.h is in libgmt-dev 4.5.12-1.
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* $Id: gmt_contour.h 10174 2014-01-02 09:42:57Z pwessel $
*
* Copyright (c) 1991-2014 by P. Wessel and W. H. F. Smith
* See LICENSE.TXT file for copying and redistribution conditions.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 or any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* Contact info: gmt.soest.hawaii.edu
*--------------------------------------------------------------------*/
/* gmt_contour.h - structures and variables needed for contour labels.
Author: Paul Wessel
Date: 18 May 2004
Version: 4
This include file defines structures and functions used.
*/
#ifndef _GMT_CONTOUR_H
#define _GMT_CONTOUR_H
#define GMT_CONTOUR_XLINE 1
#define GMT_CONTOUR_XCURVE 2
struct GMT_XOVER { /* Structure with info on all track cross-over */
double *x; /* x or Longitude */
double *y; /* y or Latitude */
double *xnode[2]; /* Decimal Node index at cross-over along track 1 and 2 */
};
struct GMT_XSEGMENT {
GMT_LONG start; /* y-array index for minimum y endpoint */
GMT_LONG stop; /* y-array index for maximum y endpoint */
};
struct GMT_LABEL { /* Contains information on contour/lineation labels */
double x, y; /* Point where label goes */
double angle; /* Angle of text unless curved text */
double line_angle; /* Angle of line at label unless curved text */
double dist;
GMT_LONG node;
GMT_LONG end; /* If N is used then -1 is start, +1 is end label */
char *label;
};
struct GMT_CONTOUR_LINE {
double *x, *y; /* Coordinates of the contour */
double z; /* Datum of this contour (z-value) */
GMT_LONG n; /* Length of the contour */
GMT_LONG annot; /* TRUE if we want labels */
char *name; /* Contour name */
struct GMT_PEN pen; /* Pen for drawing contour */
int font_rgb[3]; /* Font color */
struct GMT_LABEL *L; /* Pointer to array of structures with labels */
GMT_LONG n_labels; /* Number of labels; if 0 we just have a line segment */
};
struct GMT_CONTOUR {
/* Control section */
char option[BUFSIZ]; /* Copy of the option string */
char label[BUFSIZ]; /* Fixed label */
char line_name[16]; /* Name of line: contour or line */
char flag; /* Char for the option key */
GMT_LONG current_file_no; /* Number (0->) of current input data file */
GMT_LONG current_seg_no; /* Number (0->) of current segment in current data file */
GMT_LONG annot; /* TRUE if we want labels */
GMT_LONG isolate; /* TRUE if we have a limit on how close labels may appear (see below) */
double label_isolation; /* Only have one label inside a circle of this radius */
GMT_LONG spacing; /* TRUE if we have spacing constraints to apply */
double label_dist_spacing; /* Min distance between labels */
double label_dist_frac; /* Fraction of Min distance between labels offset for closed labels [0.25] */
GMT_LONG line_type; /* Kind of line: contour (1) or line (0) */
GMT_LONG label_font; /* Which font */
GMT_LONG dist_kind; /* What kind of distance [0 = xy, 1 = map ] */
GMT_LONG dist_unit; /* Units for labelled distances along tracks [cimp] */
PFD dist_func; /* Pointer to function that calculates distances */
double d_scale; /* Scale to yield correct units */
GMT_LONG proj_type; /* type of scaling */
PFD L_dist_func; /* Pointer to function that calculates distances for label content only */
double L_d_scale; /* Scale to yield correct units for label content only*/
GMT_LONG L_proj_type; /* type of scaling for label content only */
GMT_LONG half_width; /* Number of points to use in smoothing the angle [10/2] */
double min_radius; /* Do not place labels if the radius of curvature drops below this value [0] */
double min_dist; /* Do not place labels closer than this value [0] */
GMT_LONG number; /* TRUE if we have constraints on the number of labels to apply */
GMT_LONG number_placement; /* How the n_cont labels are distributed */
GMT_LONG n_cont; /* Number of labels per segment */
char file[BUFSIZ]; /* File with crossing lines, if specified */
GMT_LONG do_interpolate; /* TRUE if we must resample the crossing lines */
GMT_LONG crossing; /* 1 for crossing simple lines, 2 for file with crossing lines */
struct GMT_TABLE *xp; /* Table with list of structures with crossing-line coordinates */
struct GMT_XSEGMENT *ylist_XP; /* Sorted y-segments for crossing-lines */
struct GMT_XSEGMENT *ylist; /* y-indices sorted in increasing order */
struct GMT_XOVER XC; /* Structure with resulting crossovers */
GMT_LONG nx; /* Number of crossovers at any time */
GMT_LONG fixed; /* TRUE if we chose fixed positions */
double slop; /* slop distance in being close to points */
double *f_xy[2]; /* Array for fixed points */
char **f_label; /* Array for fixed labels */
GMT_LONG f_n; /* Number of such points */
double label_font_size; /* Font size for labels */
double label_angle; /* For fixed-angle labels only */
double clearance[2]; /* Spacing between text and textbox */
GMT_LONG clearance_flag; /* 1 if spacing given in % of labelfont size, 0 otherwise */
double nudge[2]; /* Shift between calculated and desired text placement */
GMT_LONG nudge_flag; /* 0 if off, 1 if nudging relative to x/y axis, 2 if following local line coordinate system */
GMT_LONG transparent; /* TRUE for transparent textbox, FALSE for opaque */
GMT_LONG box; /* Textbox bits [1 = outline, 2 = rect box shape, 4 = rounded rect shape] */
GMT_LONG curved_text; /* TRUE for text to follow curved lines */
int rgb[3]; /* Opaque box color */
int font_rgb[3]; /* Font color */
GMT_LONG got_font_rgb; /* TRUE if +k was specified */
struct GMT_PEN pen; /* Pen for drawing textbox outline */
struct GMT_PEN line_pen; /* Pen for drawing the contour line */
struct GMT_LABEL **L; /* Pointers to sorted list of labels */
GMT_LONG n_label; /* Length of list */
char unit[GMT_TEXT_LEN]; /* Unit for labels */
char prefix[GMT_TEXT_LEN]; /* prefix for labels */
GMT_LONG just; /* Label justification */
GMT_LONG end_just[2]; /* Justification for end of lines */
GMT_LONG angle_type; /* 0 = contour-parallel, 1 = contour-normal, 2 = fixed angle */
GMT_LONG hill_label; /* -1/+1 = make label readable when looking down/up gradient, 0 = no special treatment */
GMT_LONG no_gap; /* Clip contour or not depends on label placement */
GMT_LONG label_type; /* 0 = what is passed, 1 = fixed label above , 2 = multiseg header, 3 = distances */
double z_level; /* When plotted in 3-D we must have z = z_level (i.e., all points have fixed z) */
GMT_LONG data_col; /* TRUE if there is data in the zz arrays passed, FALSE if they are NULL */
GMT_LONG debug; /* TRUE of we want to draw helper lines/points */
/* Contour line section */
struct GMT_CONTOUR_LINE **segment; /* Array of segments */
GMT_LONG n_segments; /* The number of segments */
GMT_LONG n_alloc; /* How many allocated so far */
};
EXTERN_MSC GMT_LONG GMT_contlabel_info (char flag, char *txt, struct GMT_CONTOUR *G);
EXTERN_MSC void GMT_contlabel_init (struct GMT_CONTOUR *G, GMT_LONG mode);
EXTERN_MSC GMT_LONG GMT_contlabel_specs (char *txt, struct GMT_CONTOUR *G);
EXTERN_MSC GMT_LONG GMT_contlabel_prep (struct GMT_CONTOUR *G, double xyz[2][3]);
EXTERN_MSC void GMT_contlabel_angle (double x[], double y[], GMT_LONG start, GMT_LONG stop, double cangle, GMT_LONG n, struct GMT_LABEL *L, struct GMT_CONTOUR *G);
EXTERN_MSC void GMT_contlabel_draw (double x[], double y[], double d[], GMT_LONG n, struct GMT_CONTOUR *G);
EXTERN_MSC void GMT_contlabel_plot (struct GMT_CONTOUR *G);
EXTERN_MSC void GMT_contlabel_free (struct GMT_CONTOUR *G);
EXTERN_MSC void GMT_hold_contour (double **xx, double **yy, GMT_LONG nn, double zval, char *label, char ctype, double cangle, GMT_LONG closed, struct GMT_CONTOUR *G);
EXTERN_MSC GMT_LONG GMT_code_to_lonlat (char *code, double *lon, double *lat);
EXTERN_MSC void GMT_x_free (struct GMT_XOVER *X);
EXTERN_MSC GMT_LONG GMT_init_track (double y[], GMT_LONG n, struct GMT_XSEGMENT **S);
EXTERN_MSC GMT_LONG GMT_crossover (double xa[], double ya[], GMT_LONG sa[], struct GMT_XSEGMENT A[], GMT_LONG na, double xb[], double yb[], GMT_LONG sb[], struct GMT_XSEGMENT B[], GMT_LONG nb, GMT_LONG internal, GMT_LONG geo, struct GMT_XOVER *X);
#endif /* _GMT_CONTOUR_H */
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