#include <stdlib.h>
#include <math.h>
#include <grass/gis.h>
Go to the source code of this file.
Defines | |
#define | POINT struct point |
#define | X(e) (left + xconv * ((e) - window.west)) |
#define | Y(n) (top + yconv * (window.north - (n))) |
#define | EAST(x) (window.west + ((x)-left)/xconv) |
#define | NORTH(y) (window.north - ((y)-top)/yconv) |
#define | OK 0 |
#define | TOO_FEW_EDGES 2 |
#define | NO_MEMORY 1 |
#define | OUT_OF_SYNC -1 |
Functions | |
int | G_setup_plot (double t, double b, double l, double r, int(*Move)(int, int), int(*Cont)(int, int)) |
returns east larger than west | |
int | G_setup_fill (int gap) |
set row_fill routine to row_solid_fill or row_dotted_fill | |
int | G_plot_where_xy (double east, double north, int *x, int *y) |
east,north to x,y | |
int | G_plot_where_en (int x, int y, double *east, double *north) |
x,y to east,north | |
int | G_plot_point (double east, double north) |
int | G_plot_line (double east1, double north1, double east2, double north2) |
plot line between latlon coordinates | |
int | G_plot_line2 (double east1, double north1, double east2, double north2) |
int | G_plot_polygon (const double *x, const double *y, int n) |
plot filled polygon with n vertices | |
int | G_plot_area (double *const *xs, double *const *ys, int *rpnts, int rings) |
plot multiple polygons | |
int | G_plot_fx (double(*f)(double), double east1, double east2) |
plot f(east1) to f(east2) |
#define EAST | ( | x | ) | (window.west + ((x)-left)/xconv) |
#define NO_MEMORY 1 |
#define NORTH | ( | y | ) | (window.north - ((y)-top)/yconv) |
#define OK 0 |
#define OUT_OF_SYNC -1 |
#define POINT struct point |
#define TOO_FEW_EDGES 2 |
#define X | ( | e | ) | (left + xconv * ((e) - window.west)) |
Definition at line 148 of file plot.c.
Referenced by G_plot_area(), G_plot_polygon(), and G_plot_where_xy().
#define Y | ( | n | ) | (top + yconv * (window.north - (n))) |
Definition at line 149 of file plot.c.
Referenced by G_plot_area(), G_plot_polygon(), and G_plot_where_xy().
int G_plot_area | ( | double *const * | xs, | |
double *const * | ys, | |||
int * | rpnts, | |||
int | rings | |||
) |
plot multiple polygons
Like G_plot_polygon, except it takes a set of polygons, each with {npts[i]} vertices, where the number of polygons is specified with the rings argument. It is especially useful for plotting vector areas with interior islands.
xs | ||
ys | ||
npts | ||
rings |
Definition at line 542 of file plot.c.
References G_free(), NO_MEMORY, NULL, OK, OUT_OF_SYNC, POINT, TOO_FEW_EDGES, X, and Y.
int G_plot_fx | ( | double(*)(double) | f, | |
double | east1, | |||
double | east2 | |||
) |
plot f(east1) to f(east2)
The function f(east) is plotted from east1 to east2. The function f(east) must return the map northing coordinate associated with east.
~ |
Definition at line 811 of file plot.c.
References G_plot_line().
int G_plot_line | ( | double | east1, | |
double | north1, | |||
double | east2, | |||
double | north2 | |||
) |
plot line between latlon coordinates
A line from east1,north1 to east2,north2 is plotted in output x,y coordinates (e.g. pixels for graphics.) This routine handles global wrap-around for latitude-longitude databases.
east1 | ||
north1 | ||
east2 | ||
north2 |
Definition at line 230 of file plot.c.
Referenced by G_plot_fx(), and G_plot_icon().
int G_plot_line2 | ( | double | east1, | |
double | north1, | |||
double | east2, | |||
double | north2 | |||
) |
int G_plot_point | ( | double | east, | |
double | north | |||
) |
int G_plot_polygon | ( | const double * | x, | |
const double * | y, | |||
int | n | |||
) |
plot filled polygon with n vertices
The polygon, described by the n vertices east,north, is plotted in the output x,y space as a filled polygon.
east | ||
north | ||
n |
Definition at line 412 of file plot.c.
References NO_MEMORY, OK, OUT_OF_SYNC, POINT, TOO_FEW_EDGES, X, and Y.
int G_plot_where_en | ( | int | x, | |
int | y, | |||
double * | east, | |||
double * | north | |||
) |
x,y to east,north
The pixel coordinates x,y are converted to map coordinates east,north.
x | ||
y | ||
east | ||
north |
Definition at line 190 of file plot.c.
References EAST, G_adjust_easting(), and NORTH.
int G_plot_where_xy | ( | double | east, | |
double | north, | |||
int * | x, | |||
int * | y | |||
) |
east,north to x,y
The map coordinates east,north are converted to pixel coordinates x,y.
east | ||
north | ||
x | ||
y |
Definition at line 168 of file plot.c.
References G_adjust_easting(), X, and Y.
Referenced by G_plot_point().
int G_setup_fill | ( | int | gap | ) |
set row_fill routine to row_solid_fill or row_dotted_fill
After calling this function, G_plot_polygon() and G_plot_area() fill shapes with solid or dotted lines. If gap is greater than zero, this value will be used for row_dotted_fill. Otherwise, row_solid_fill is used.
int |
int G_setup_plot | ( | double | t, | |
double | b, | |||
double | l, | |||
double | r, | |||
int(*)(int, int) | Move, | |||
int(*)(int, int) | Cont | |||
) |
returns east larger than west
If the region projection is PROJECTION_LL, then this routine returns an equivalent east that is larger, but no more than 360 degrees larger, than the coordinate for the western edge of the region. Otherwise no adjustment is made and the original east is returned.
east | ||
region |
~ |
Definition at line 97 of file plot.c.
References G_get_set_window().