rdata.c File Reference

#include <syslog.h>
#include <math.h>
#include <string.h>
#include "rdata.h"
#include "smrender.h"
#include "smrender_dev.h"

Include dependency graph for rdata.c:

Macros
#define	TEST_RDU_VAL   1.0

Functions
struct rdata *	rdata_get (void)
double	mm2ptf (double x)
double	mm2pxf (double x)
int	mm2pxi (double x)
void	pxf2geo (double x, double y, double *lon, double *lat)
void	geo2pxf_rect (double lon, double lat, double *x, double *y)
void	geo2pxf (double lon, double lat, double *x, double *y)
void	geo2pt (double lon, double lat, double *x, double *y)
void	geo2pxi (double lon, double lat, int *x, int *y)
void	rdata_log (void)
double	rdata_px_unit (double x, unit_t type)
double	rdata_unit_px (double x, unit_t type)
double	rdata_unit (const value_t *v, unit_t u)
const char *	unit_str (unit_t type)
double	rdata_page_width (unit_t type)
double	rdata_page_height (unit_t type)
double	rdata_width (unit_t type)
double	rdata_height (unit_t type)
int	rdata_dpi (void)
double	rdata_square_mm (void)
double	rdata_square_nm (void)
double	rdata_scale (void)
int	is_on_page (const struct coord *c)

Detailed Description

This file contains functions for rendering initialization, such as unit conversions and paper and coordinate initialization.

Author

Bernhard R. Fischer

Function Documentation

void geo2pt	(	double	lon,
		double	lat,
		double *	x,
		double *	y
	)

Convert geographic to page coordinates, i.e. Cartesian coordinates dependent on pixel density (dpi).

Parameters

lon	Longitude of object.
lat	Latitude of object.
x	Pointer to x coordinate for result.
y	Pointer to y coordinate.

void geo2pxf	(	double	lon,
		double	lat,
		double *	x,
		double *	y
	)

Convert geographic to Cartesian (pixel) coordinates x and y.

Parameters

lon	Longitude of object.
lat	Latitude of object.
x	Pointer to x coordinate for result.
y	Pointer to y coordinate.

void geo2pxf_rect	(	double	lon,
		double	lat,
		double *	x,
		double *	y
	)

This function projects the polygon defined by the 4 points rd_.pw[] (pw[0] -> left lower, pw[1] -> right lower, pw[2] -> right upper, pw[3] -> left upper) to the rectangular page. This does not fulfill Mercartor constraints. The function is experimental.