#include <grass/gis.h>
#include <grass/display.h>

Include dependency graph for cnversions.c:

Data Structures
struct	rectangle

struct	vector

Functions
int	D_do_conversions (const struct Cell_head *window, int t, int b, int l, int r)
	initialize conversions More...

int	D_is_lat_lon (void)

double	D_get_ns_resolution (void)

double	D_get_ew_resolution (void)

double	D_get_u_to_d_xconv (void)

double	D_get_u_to_d_yconv (void)

double	D_get_u_west (void)

double	D_get_u_east (void)

double	D_get_u_north (void)

double	D_get_u_south (void)

double	D_get_a_west (void)

double	D_get_a_east (void)

double	D_get_a_north (void)

double	D_get_a_south (void)

double	D_get_d_west (void)

double	D_get_d_east (void)

double	D_get_d_north (void)

double	D_get_d_south (void)

void	D_get_u (double x[2][2])

void	D_get_a (int x[2][2])

void	D_get_d (int x[2][2])

double	D_u_to_a_row (double U_row)
	earth to array (north) More...

double	D_u_to_a_col (double U_col)
	earth to array (east More...

double	D_a_to_d_row (double A_row)
	array to screen (row) More...

double	D_a_to_d_col (double A_col)
	array to screen (column) More...

double	D_u_to_d_row (double U_row)
	earth to screen (north) More...

double	D_u_to_d_col (double U_col)
	earth to screen (east) More...

double	D_d_to_u_row (double D_row)
	screen to earth (y) More...

double	D_d_to_u_col (double D_col)
	screen to earth (x) More...

double	D_d_to_a_row (double D_row)
	screen to array (y) More...

double	D_d_to_a_col (double D_col)
	screen to array (x) More...

Function Documentation

double D_a_to_d_col ( double A_col )

array to screen (column)

Returns an x value in the screen coordinate system when provided the corresponding column value in the array coordinate system.

Parameters

column

Returns: double

Definition at line 319 of file cnversions.c.

References D, rectangle::west, and vector::x.

double D_a_to_d_row ( double A_row )

array to screen (row)

Returns a y value in the screen coordinate system when provided the corresponding row value in the array coordinate system.

Parameters

row

Returns: double

Definition at line 302 of file cnversions.c.

References D, rectangle::north, and vector::y.

double D_d_to_a_col ( double D_col )

screen to array (x)

Returns a column value in the array coordinate system when provided the corresponding x value in the screen coordinate system.

Parameters

x

Returns: double

Definition at line 415 of file cnversions.c.

References D, rectangle::west, and vector::x.

double D_d_to_a_row ( double D_row )

screen to array (y)

Returns a row value in the array coordinate system when provided the corresponding y value in the screen coordinate system.

Parameters

y

Returns: double

Definition at line 399 of file cnversions.c.

References D, rectangle::north, and vector::y.

double D_d_to_u_col ( double D_col )

screen to earth (x)

Returns an east value in the earth coordinate system when provided the corresponding x value in the screen coordinate system.

Parameters

x

Returns: double

Definition at line 383 of file cnversions.c.

References D, rectangle::west, and vector::x.

double D_d_to_u_row ( double D_row )

screen to earth (y)

Returns a north value in the earth coordinate system when provided the corresponding y value in the screen coordinate system.

Parameters

y

Returns: double

Definition at line 367 of file cnversions.c.

References D, rectangle::north, and vector::y.

int D_do_conversions	(	const struct Cell_head *	window,
		int	t,
		int	b,
		int	l,
		int	r
	)

initialize conversions

The relationship between the earth region and the top, bottom, left, and right screen coordinates is established, which then allows conversions between all three coordinate systems to be performed. Note this routine is called by D_setup.

Parameters