GRASS Programmer's Manual  6.5.svn(2014)-r66266
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Pages
cnversions.c File Reference
#include <grass/gis.h>
#include <grass/display.h>
Include dependency graph for cnversions.c:

Go to the source code of this file.

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
region
top
bottom
left
right
Returns
int

Definition at line 69 of file cnversions.c.

References D, rectangle::east, rectangle::north, rectangle::south, rectangle::west, vector::x, and vector::y.

Referenced by D_cell_draw_setup(), and D_setup().

void D_get_a ( int  x[2][2])

Definition at line 244 of file cnversions.c.

References rectangle::east, int, rectangle::north, rectangle::south, and rectangle::west.

Referenced by D_cell_draw_setup().

double D_get_a_east ( void  )

Definition at line 206 of file cnversions.c.

References rectangle::east.

double D_get_a_north ( void  )

Definition at line 210 of file cnversions.c.

References rectangle::north.

double D_get_a_south ( void  )

Definition at line 214 of file cnversions.c.

References rectangle::south.

double D_get_a_west ( void  )

Definition at line 202 of file cnversions.c.

References rectangle::west.

void D_get_d ( int  x[2][2])

Definition at line 252 of file cnversions.c.

References D, and int.

Referenced by D_cell_draw_setup().

double D_get_d_east ( void  )

Definition at line 223 of file cnversions.c.

References D.

Referenced by D_set_clip_window_to_map_window().

double D_get_d_north ( void  )

Definition at line 227 of file cnversions.c.

References D.

Referenced by D_set_clip_window_to_map_window().

double D_get_d_south ( void  )

Definition at line 231 of file cnversions.c.

References D.

Referenced by D_set_clip_window_to_map_window().

double D_get_d_west ( void  )

Definition at line 219 of file cnversions.c.

References D.

Referenced by D_set_clip_window_to_map_window().

double D_get_ew_resolution ( void  )

Definition at line 171 of file cnversions.c.

References vector::x.

double D_get_ns_resolution ( void  )

Definition at line 167 of file cnversions.c.

References vector::y.

void D_get_u ( double  x[2][2])

Definition at line 236 of file cnversions.c.

References rectangle::east, rectangle::north, rectangle::south, and rectangle::west.

double D_get_u_east ( void  )

Definition at line 189 of file cnversions.c.

References rectangle::east.

Referenced by D_clip_to_map().

double D_get_u_north ( void  )

Definition at line 193 of file cnversions.c.

References rectangle::north.

Referenced by D_clip_to_map().

double D_get_u_south ( void  )

Definition at line 197 of file cnversions.c.

References rectangle::south.

Referenced by D_clip_to_map().

double D_get_u_to_d_xconv ( void  )

Definition at line 176 of file cnversions.c.

References vector::x.

double D_get_u_to_d_yconv ( void  )

Definition at line 180 of file cnversions.c.

References vector::y.

double D_get_u_west ( void  )

Definition at line 185 of file cnversions.c.

References rectangle::west.

Referenced by D_clip_to_map().

int D_is_lat_lon ( void  )
double D_u_to_a_col ( double  U_col)

earth to array (east

Returns a column value in the array coordinate system when provided the corresponding east value in the earth coordinate system.

Parameters
east
Returns
double

Definition at line 286 of file cnversions.c.

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

double D_u_to_a_row ( double  U_row)

earth to array (north)

Returns a row value in the array coordinate system when provided the corresponding north value in the earth coordinate system.

Parameters
north
Returns
double

Definition at line 270 of file cnversions.c.

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

double D_u_to_d_col ( double  U_col)

earth to screen (east)

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

Parameters
east
Returns
double

Definition at line 351 of file cnversions.c.

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

Referenced by D_box(), D_cont(), and D_move().

double D_u_to_d_row ( double  U_row)

earth to screen (north)

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

Parameters
north
Returns
double

Definition at line 335 of file cnversions.c.

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

Referenced by D_box(), D_cont(), and D_move().