#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <string.h>
#include <time.h>
#include "libtpcsvg.h"

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Functions
int	get_line_intersection (double a1x, double a1y, double a2x, double a2y, double b1x, double b1y, double b2x, double b2y, double ix, double iy)
int	check_intersection_with_viewport (double x1, double y1, double x2, double y2, struct svg_viewport_pos cavp, double nx1, double ny1, double nx2, double *ny2)
int	svg_start_plot_viewport (FILE fp, struct svg_viewports vp, char *errmsg)
int	svg_end_plot_viewport (FILE fp, struct svg_viewports vp, char *errmsg)
int	svg_start_coordinate_viewport (FILE fp, struct svg_viewports vp, char *errmsg)
int	svg_end_coordinate_viewport (FILE fp, char errmsg)
int	svg_calculate_axes (struct svg_viewports *vp)
int	svg_write_axes (FILE fp, struct svg_viewports vp, char *errmsg)
int	svg_write_xticks (FILE fp, struct svg_viewports vp, char *errmsg)
int	svg_write_yticks (FILE fp, struct svg_viewports vp, char *errmsg)
int	svg_write_tac (FILE fp, struct svg_viewports vp, int plot_type, char tac_id, char tac_title, double x, double y, int data_nr, char color, svgSymbolType symbol_type, char errmsg)
Variables
int	SVG_INLINE
int	SVG_TEST

Function Documentation

int check_intersection_with_viewport	(	double	x1,
		double	y1,
		double	x2,
		double	y2,
		struct svg_viewport_pos *	cavp,
		double *	nx1,
		double *	ny1,
		double *	nx2,
		double *	ny2
	)

Parameters:

x1	x,y coordinates of line at points 1 and 2; x coordinate of point 1
y1	y coordinate of point 1
x2	x coordinate of point 2
y2	y coordinate of point 2
cavp	Pointer to coordinate area viewport
nx1	Pointers for (possibly) modified line coordinates; NULL if not needed
ny1	new y coordinate of point 1
nx2	new x coordinate of point 2
ny2	new y coordinate of point 2

Definition at line 132 of file svg_plot.c.

References get_line_intersection(), svg_viewport_pos::h, SVG_TEST, and svg_viewport_pos::w.

Referenced by svg_write_tac().

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int get_line_intersection	(	double	a1x,
		double	a1y,
		double	a2x,
		double	a2y,
		double	b1x,
		double	b1y,
		double	b2x,
		double	b2y,
		double *	ix,
		double *	iy
	)

Check whether two lines, each drawn between two points, intersect each other. If either end of lines intersects with the other line, that is NOT counted as intersection.

Returns:: Returns 1 in case of intersection, and 0 if they do not cross.

Parameters:

a1x	x,y coordinates of line a at points 1 and 2; x coordinate of point 1
a1y	y coordinate of point 1
a2x	x coordinate of point 2
a2y	y coordinate of point 2
b1x	x,y coordinates of line b at points 1 and 2; x coordinate of point 1
b1y	y coordinate of point 1
b2x	x coordinate of point 2
b2y	y coordinate of point 2
ix	Pointers for intersection point coordinates; NULL if not needed
iy	Intersection y coordinate

Definition at line 87 of file svg_plot.c.

References SVG_TEST.

Referenced by check_intersection_with_viewport().

int svg_calculate_axes ( struct svg_viewports * vp )

Calculate the axis tick positions. Before calling this, viewport must be filled with curve min and max values. This routine checks that max>min, changing the values if necessary.

Returns:: Returns 0 if successful, <>0 in case of error.

Parameters:

vp	Struct containing the viewport sizes

Definition at line 381 of file svg_plot.c.

References axis_check_range(), axis_tick_positions(), svg_coord::fixed_max, svg_coord::fixed_min, svg_coord::max, MAX_TICK_NR, svg_coord::min, svg_coord::tick, svg_coord::tick_decimals, svg_coord::tick_label, svg_coord::tick_nr, svg_coord::tickscale, svg_viewports::x, and svg_viewports::y.

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int svg_end_coordinate_viewport	(	FILE *	fp,
		char *	errmsg
	)

End coordinate area viewport.

Returns:: Returns 0 if successful, <>0 in case of error.

Parameters:

fp	SVG graphics file pointer
errmsg	Char pointer to string (at least of length 128) where possible error description is copied; set to NULL if not necessary

Definition at line 353 of file svg_plot.c.

References SVG_INLINE, and svg_write().

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int svg_end_plot_viewport	(	FILE *	fp,
		struct svg_viewports *	vp,
		char *	errmsg
	)

End plot viewport.

Returns:: Returns 0 if successful, <>0 in case of error.

Parameters:

fp	SVG graphics file pointer
vp	Struct containing the viewport sizes
errmsg	Char pointer to string (at least of length 128) where possible error description is copied; set to NULL if not necessary

Definition at line 280 of file svg_plot.c.

References SVG_INLINE, and svg_write().

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int svg_start_coordinate_viewport	(	FILE *	fp,
		struct svg_viewports *	vp,
		char *	errmsg
	)

Start coordinate area viewport.

Returns:: Returns 0 if successful, <>0 in case of error.

Parameters:

fp	SVG graphics file pointer
vp	Struct containing the viewport sizes
errmsg	Char pointer to string (at least of length 128) where possible error description is copied; set to NULL if not necessary

Definition at line 310 of file svg_plot.c.

References svg_viewports::coordinate_area_viewport, svg_viewport_pos::h, SVG_INLINE, svg_write(), svg_viewport_pos::w, svg_viewport_pos::x, and svg_viewport_pos::y.

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int svg_start_plot_viewport	(	FILE *	fp,
		struct svg_viewports *	vp,
		char *	errmsg
	)

Start plot area viewport.

Returns:: Returns 0 if successful, <>0 in case of error.

Parameters:

fp	SVG graphics file pointer
vp	Struct containing the viewport sizes
errmsg	Char pointer to string (at least of length 128) where possible error description is copied; set to NULL if not necessary

Definition at line 234 of file svg_plot.c.

References svg_viewport_pos::h, svg_viewports::plot_area_viewport, svg_define_symbols(), SVG_INLINE, svg_write(), svg_viewport_pos::w, svg_viewport_pos::x, and svg_viewport_pos::y.

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int svg_write_axes	(	FILE *	fp,
		struct svg_viewports *	vp,
		char *	errmsg
	)

Draw the axes into SVG plot coordinate area.

Returns:: Returns 0 if successful, <>0 in case of error.

Parameters:

fp	SVG graphics file pointer
vp	Struct containing the viewport sizes
errmsg	Pointer to string where error message is written; NULL if not needed

Definition at line 438 of file svg_plot.c.

References svg_viewports::coordinate_area_viewport, svg_viewport_pos::h, svg_coord::max, svg_coord::min, svg_coord::origo, svg_coord::scale, SVG_INLINE, SVG_TEST, svg_write(), svg_coord::upper_margin, svg_viewport_pos::w, svg_viewports::x, and svg_viewports::y.

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int svg_write_tac	(	FILE *	fp,
		struct svg_viewports *	vp,
		int	plot_type,
		char *	tac_id,
		char *	tac_title,
		double *	x,
		double *	y,
		int	data_nr,
		char *	color,
		svgSymbolType	symbol_type,
		char *	errmsg
	)

Draw sample curve in an SVG file.

Returns:: Returns 0 if successful, <>0 in case of error.

Parameters:

fp	SVG graphics file pointer
vp	Struct containing the viewport sizes
plot_type	Plot type: 1=line, 2=symbols, 0=both line and symbols
tac_id	Unique ID for the curve
tac_title	Title of the curve, which may be shown in the graph
x	Pointer to the polyline data x array (original quantities)
y	Pointer to the polyline data y array (original quantities)
data_nr	Nr of data points in the array (half of array length)
color	SVG color name as a string, e.g. aqua,black,blue,fuchsia,gray, green,lime,maroon,navy,olive,purple,red,silver,teal,yellow. Note that this string is not tested
symbol_type	Symbol type: RECTANGLE,CIRCLE,UPTRIANGLE,DOWNTRIANGLE,DIAMOND, LEFTTRIANGLE, RIGHTTRIANGLE
errmsg	Char pointer to string (at least of length 128) where possible error description is copied; set to NULL if not necessary

Definition at line 665 of file svg_plot.c.

References check_intersection_with_viewport(), CIRCLE, svg_viewports::coordinate_area_viewport, DIAMOND, DOWNTRIANGLE, svg_viewport_pos::h, LEFTTRIANGLE, svg_coord::origo, RECTANGLE, RIGHTTRIANGLE, svg_coord::scale, SVG_INLINE, SVG_TEST, svg_write(), UPTRIANGLE, svg_viewport_pos::w, svg_viewports::x, and svg_viewports::y.

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int svg_write_xticks	(	FILE *	fp,
		struct svg_viewports *	vp,
		char *	errmsg
	)

Create SVG plot x axis ticks.

Returns:: Returns 0 if successful, <>0 in case of error.

Parameters:

fp	SVG graphics file pointer
vp	Struct containing the viewport sizes
errmsg	Char pointer to string (at least of length 128) where possible error description is copied; set to NULL if not necessary

Definition at line 523 of file svg_plot.c.

References svg_viewport_pos::chr_size, svg_viewports::coordinate_area_viewport, svg_viewport_pos::h, svg_coord::origo, svg_viewports::plot_area_viewport, svg_coord::scale, SVG_INLINE, SVG_TEST, svg_write(), svg_coord::tick, svg_coord::tick_label, svg_coord::tick_nr, svg_coord::tickscale, svg_viewport_pos::w, and svg_viewports::x.

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int svg_write_yticks	(	FILE *	fp,
		struct svg_viewports *	vp,
		char *	errmsg
	)

Create SVG plot y axis ticks.

Returns:: Returns 0 if successful, <>0 in case of error.

Parameters:

fp	SVG graphics file pointer
vp	Struct containing the viewport sizes
errmsg	Char pointer to string (at least of length 128) where possible error description is copied; set to NULL if not necessary

Definition at line 591 of file svg_plot.c.

References svg_viewport_pos::chr_size, svg_viewports::coordinate_area_viewport, svg_viewport_pos::h, svg_coord::origo, svg_viewports::plot_area_viewport, svg_coord::scale, SVG_INLINE, SVG_TEST, svg_write(), svg_coord::tick, svg_coord::tick_decimals, svg_coord::tick_label, svg_coord::tick_nr, svg_coord::tickscale, svg_viewport_pos::w, and svg_viewports::y.

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Variable Documentation

int SVG_INLINE

Definition at line 50 of file svg_file.c.

int SVG_TEST

Definition at line 51 of file svg_file.c.

Functions

Variables

Function Documentation

Variable Documentation