Graphviz: lib/neatogen/neatosplines.c File Reference

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#include <assert.h>
#include "config.h"
#include <cgraph/alloc.h>
#include <cgraph/unreachable.h>
#include <limits.h>
#include <math.h>
#include <neatogen/neato.h>
#include <neatogen/adjust.h>
#include <pathplan/pathplan.h>
#include <pathplan/vispath.h>
#include <neatogen/multispline.h>
#include <stdbool.h>
#include <stddef.h>

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Data Structures
struct	edgeinfo

struct	edgeitem

Macros
#define	BOUNDARY_PORT(e) ((ED_tail_port(e).side)\|\|(ED_head_port(e).side))

Functions
static bool	spline_merge (node_t *n)

static bool	swap_ends_p (edge_t *e)

static void	make_barriers (Ppoly_t poly, int npoly, int pp, int qp, Pedge_t barriers, size_t *n_barriers)

static Ppoint_t	genPt (double x, double y, pointf c)

static Ppoint_t	recPt (double x, double y, pointf c, expand_t *m)

static void *	newitem (edgeitem obj, Dtdisc_t disc)

static int	cmpitems (void k1, void k2)

static edge_t *	equivEdge (Dt_t map, edge_t e)

void	makeSelfArcs (edge_t *e, int stepx)

static double	ellipse_tangent_slope (double a, double b, pointf p)

static pointf	line_intersection (linef l0, linef l1)

static pointf	circumscribed_polygon_corner_about_ellipse (double a, double b, size_t i, size_t nsides)

Ppoly_t *	makeObstacle (node_t n, expand_t pmargin, bool isOrtho)

Ppolyline_t	getPath (edge_t e, vconfig_t vconfig, bool chkPts)

static void	makePolyline (edge_t *e)

void	makeSpline (edge_t e, Ppoly_t *obs, int npoly, bool chkPts)

static int	_spline_edges (graph_t g, expand_t pmargin, int edgetype)

int	splineEdges (graph_t g, int(edgefn)(graph_t , expand_t , int), int edgetype)

int	spline_edges1 (graph_t *g, int edgetype)

void	spline_edges0 (graph_t *g, bool set_aspect)

static void	shiftClusters (graph_t *g, pointf offset)

void	spline_edges (graph_t *g)

static void	scaleEdge (edge_t *e, double xf, double yf)

static void	scaleBB (graph_t *g, double xf, double yf)

static void	translateE (edge_t *e, pointf offset)

static void	translateG (Agraph_t *g, pointf offset)

void	neato_translate (Agraph_t *g)

static bool	_neato_set_aspect (graph_t *g)

bool	neato_set_aspect (graph_t *g)

Variables
static splineInfo	sinfo

Dtdisc_t	edgeItemDisc

Macro Definition Documentation

◆ BOUNDARY_PORT

#define BOUNDARY_PORT ( e ) ((ED_tail_port(e).side)||(ED_head_port(e).side))

Definition at line 578 of file neatosplines.c.

Function Documentation

◆ _neato_set_aspect()

static bool _neato_set_aspect ( graph_t * g )

static

Definition at line 1026 of file neatosplines.c.

References agfstnode(), agfstout(), agnxtnode(), agnxtout(), ED_spl, exch_xyf(), GD_bb, GD_drawing, GD_flip, ND_pos, neato_translate(), Nop, R_EXPAND, R_FILL, R_VALUE, Agraph_s::root, scale(), scaleBB(), scaleEdge(), and pointf_s::y.

Referenced by neato_set_aspect().

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◆ _spline_edges()

static int _spline_edges	(	graph_t *	g,
		expand_t *	pmargin,
		int	edgetype
	)

static

Definition at line 590 of file neatosplines.c.

References add_pointf(), addEdgeLabels(), agfstnode(), agfstout(), aghead, agnnodes(), agnxtnode(), agnxtout(), agwarningf(), BOUNDARY_PORT, cnt(), Concentrate, ED_count, ED_head_port, ED_path, ED_spl, ED_tail_port, ED_to_virt, EDGETYPE_ORTHO, EDGETYPE_PLINE, EDGETYPE_SPLINE, free(), freeRouter(), GD_nodesep, getPath(), gv_calloc(), head, makeMultiSpline(), makeObstacle(), makePolyline(), makeSelfArcs(), makeSpline(), makeStraightEdge(), mkRouter(), ND_coord, ND_lim, Nop, orthoEdges(), Plegal_arrangement(), Pobsclose(), Pobsopen(), POLYID_NONE, ps, Agraph_s::root, sinfo, Verbose, expand_t::x, and expand_t::y.

Referenced by spline_edges1().

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◆ circumscribed_polygon_corner_about_ellipse()

static pointf circumscribed_polygon_corner_about_ellipse	(	double	a,
		double	b,
		size_t	i,
		size_t	nsides
	)

static

calculate a corner of a polygon circumscribed about an ellipse

Parameters

a	Half the width of the ellipse, i.e., the maximum x value
b	Half the height of the ellipse, i.e., the maximum y value
i	Index of the polygon corner
nsides	Number of sides of the polygon

Returns: Polygon corner at index i

Definition at line 299 of file neatosplines.c.

References ellipse_tangent_slope(), line_intersection(), M_PI, pointf_s::x, and pointf_s::y.

Referenced by makeObstacle().

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◆ cmpitems()

static int cmpitems	(	void *	k1,
		void *	k2
	)

static

Definition at line 120 of file neatosplines.c.

References edgeinfo::n1, edgeinfo::n2, edgeinfo::p1, edgeinfo::p2, pointf_s::x, and pointf_s::y.

◆ ellipse_tangent_slope()

static double ellipse_tangent_slope	(	double	a,
		double	b,
		pointf	p
	)

static

calculate the slope of the tangent of an ellipse

The equation for the slope m of the tangent of an ellipse as a function of x * is given by:

bx

m = ± ――――――――――

a √ a²- x²

m = ± (b * x) / (a * sqrt(a * a - x * x))

We know that the slope is negative in the first and third quadrant, i.e., when the signs of x and y are the same, so we use that to select the correct slope.

Parameters

a	Half the width of the ellipse, i.e., the maximum x value
b	Half the height of the ellipse, i.e., the maximum y value
p	A point on the ellipse periphery in which to calculate the slope of the tangent

Returns: The slope of the tangent in point p

Definition at line 269 of file neatosplines.c.

References pointf_s::x, and pointf_s::y.

Referenced by circumscribed_polygon_corner_about_ellipse().

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◆ equivEdge()

static edge_t * equivEdge	(	Dt_t *	map,
		edge_t *	e
	)

static

Definition at line 167 of file neatosplines.c.

References aghead, agtail, dtinsert, edgeitem::e, ED_head_port, ED_tail_port, edgeitem::id, edgeinfo::n1, edgeinfo::n2, edgeinfo::p1, edgeinfo::p2, pointf_s::x, and pointf_s::y.

Referenced by splineEdges().

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◆ genPt()

static Ppoint_t genPt	(	double	x,
		double	y,
		pointf	c
	)

static

Definition at line 78 of file neatosplines.c.

References pointf_s::x, Pxy_t::x, pointf_s::y, and Pxy_t::y.

Referenced by makeObstacle().

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◆ getPath()

Ppolyline_t getPath	(	edge_t *	e,
		vconfig_t *	vconfig,
		bool	chkPts
	)

Definition at line 501 of file neatosplines.c.

References add_pointf(), aghead, agtail, ED_head_port, ED_tail_port, ND_coord, ND_lim, Pobspath(), and POLYID_NONE.

Referenced by _spline_edges(), and compoundEdges().

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◆ line_intersection()

static pointf line_intersection	(	linef	l0,
		linef	l1
	)

static

calculate the intersection of two lines

Parameters

l0	First line
l1	Second line

Returns: Intersection of the two lines

Definition at line 284 of file neatosplines.c.

References linef::m, linef::p, pointf_s::x, and pointf_s::y.

Referenced by circumscribed_polygon_corner_about_ellipse().

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◆ make_barriers()

static void make_barriers	(	Ppoly_t **	poly,
		int	npoly,
		int	pp,
		int	qp,
		Pedge_t **	barriers,
		size_t *	n_barriers
	)

static

Definition at line 45 of file neatosplines.c.

References Pedge_t::a, Pedge_t::b, and gv_calloc().

Referenced by makeSpline().

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◆ makeObstacle()

Ppoly_t * makeObstacle	(	node_t *	n,
		expand_t *	pmargin,
		bool	isOrtho
	)

Definition at line 325 of file neatosplines.c.

References field_t::b, circumscribed_polygon_corner_about_ellipse(), expand_t::doAdd, genPt(), gv_alloc(), gv_calloc(), INCH2PS, late_double(), boxf::LL, N_penwidth, ND_coord, ND_ht, ND_lw, ND_outline_height, ND_outline_width, ND_rw, ND_shape_info, NULL, penwidth, Ppoly_t::pn, polyBB(), Ppoly_t::ps, recPt(), SH_EPSF, SH_POINT, SH_POLY, SH_RECORD, shapeOf(), UNREACHABLE, boxf::UR, pointf_s::x, expand_t::x, Pxy_t::x, pointf_s::y, expand_t::y, and Pxy_t::y.

Referenced by _spline_edges(), and addGraphObjs().

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◆ makePolyline()

static void makePolyline ( edge_t * e )

static

Definition at line 519 of file neatosplines.c.

References addEdgeLabels(), aghead, agnameof(), agtail, clip_and_install(), ED_path, make_polyline(), Ppoly_t::pn, Ppoly_t::ps, sinfo, and Verbose.

Referenced by _spline_edges().

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◆ makeSelfArcs()

void makeSelfArcs	(	edge_t *	e,
		int	stepx
	)

Definition at line 216 of file neatosplines.c.

References agraphof(), agtail, cnt(), Concentrate, ED_count, ED_label, ED_to_virt, free(), gv_calloc(), makePortLabels(), makeSelfEdge(), sinfo, and updateBB().

Referenced by _spline_edges(), and compoundEdges().

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◆ makeSpline()

void makeSpline	(	edge_t *	e,
		Ppoly_t **	obs,
		int	npoly,
		bool	chkPts
	)

Definition at line 539 of file neatosplines.c.

References addEdgeLabels(), agerrorf(), aghead, agnameof(), agtail, clip_and_install(), ED_path, free(), in_poly(), make_barriers(), Ppoly_t::pn, POLYID_NONE, Proutespline(), Ppoly_t::ps, sinfo, Verbose, Pxy_t::x, and Pxy_t::y.

Referenced by _spline_edges(), and compoundEdges().

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◆ neato_set_aspect()

bool neato_set_aspect ( graph_t * g )

Definition at line 1117 of file neatosplines.c.

References _neato_set_aspect(), agfstnode(), agnxtnode(), ND_coord, ND_pos, and POINTS_PER_INCH.

Referenced by fdp_layout(), init_nop(), and spline_edges0().

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◆ neato_translate()

void neato_translate ( Agraph_t * g )

Definition at line 994 of file neatosplines.c.

References agfstnode(), agfstout(), agnxtnode(), agnxtout(), ED_spl, GD_bb, ND_pos, ND_xlabel, offset, PS2INCH, translateE(), translateG(), pointf_s::x, and pointf_s::y.

Referenced by _neato_set_aspect(), and init_nop().

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◆ newitem()

static void * newitem	(	edgeitem *	obj,
		Dtdisc_t *	disc
	)

static

Definition at line 108 of file neatosplines.c.

References edgeitem::e, ED_count, gv_alloc(), and edgeitem::id.

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◆ recPt()

static Ppoint_t recPt	(	double	x,
		double	y,
		pointf	c,
		expand_t *	m
	)

static

Definition at line 87 of file neatosplines.c.

References pointf_s::x, expand_t::x, Pxy_t::x, pointf_s::y, expand_t::y, and Pxy_t::y.

Referenced by makeObstacle().

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◆ scaleBB()

static void scaleBB	(	graph_t *	g,
		double	xf,
		double	yf
	)

static

Definition at line 912 of file neatosplines.c.

References GD_bb, GD_clust, GD_label, GD_n_cluster, and scaleBB().

Referenced by _neato_set_aspect(), and scaleBB().

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◆ scaleEdge()

static void scaleEdge	(	edge_t *	e,
		double	xf,
		double	yf
	)

static

Definition at line 855 of file neatosplines.c.

References aghead, agtail, ED_head_label, ED_label, ED_spl, ED_tail_label, bezier::eflag, bezier::ep, bezier::list, ND_pos, POINTS_PER_INCH, bezier::sflag, bezier::size, bezier::sp, pointf_s::x, and pointf_s::y.

Referenced by _neato_set_aspect().

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◆ shiftClusters()

static void shiftClusters	(	graph_t *	g,
		pointf	offset
	)

static

Definition at line 816 of file neatosplines.c.

References GD_bb, GD_clust, GD_n_cluster, offset, and shiftClusters().

Referenced by shiftClusters(), and spline_edges().

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◆ spline_edges()

void spline_edges ( graph_t * g )

Definition at line 834 of file neatosplines.c.

References agfstnode(), agnxtnode(), compute_bb(), GD_bb, ND_pos, offset, PS2INCH, shiftClusters(), and spline_edges0().

Referenced by circo_layout(), neato_layout(), sfdp_layout(), and twopi_layout().

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◆ spline_edges0()

void spline_edges0	(	graph_t *	g,
		bool	set_aspect
	)

Definition at line 800 of file neatosplines.c.

References agwarningf(), EDGE_TYPE, EDGETYPE_NONE, EDGETYPE_ORTHO, EDGETYPE_PLINE, GD_flags, neato_set_aspect(), Agraph_s::root, set_aspect(), and spline_edges1().

Referenced by doEdges(), init_nop(), osage_layout(), and spline_edges().

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◆ spline_edges1()

int spline_edges1	(	graph_t *	g,
		int	edgetype
	)

Definition at line 781 of file neatosplines.c.

References _spline_edges(), and splineEdges().

Referenced by fdpSplines(), osage_layout(), and spline_edges0().

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◆ spline_merge()

static bool spline_merge ( node_t * n )

static

Definition at line 30 of file neatosplines.c.

◆ splineEdges()

int splineEdges	(	graph_t *	g,
		int()(graph_t , expand_t *, int)	edgefn,
		int	edgetype
	)

Definition at line 733 of file neatosplines.c.

References agfstnode(), agfstout(), agnxtnode(), agnxtout(), dtclose(), dtopen(), Dtoset, ED_count, ED_spl, ED_to_virt, edgeItemDisc, equivEdge(), esepFactor(), GVSPLINES, Nop, resolvePorts(), and State.

Referenced by fdpSplines(), and spline_edges1().

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◆ swap_ends_p()

static bool swap_ends_p ( edge_t * e )

static

Definition at line 36 of file neatosplines.c.

◆ translateE()

static void translateE	(	edge_t *	e,
		pointf	offset
	)

static

Definition at line 934 of file neatosplines.c.

References ED_head_label, ED_label, ED_spl, ED_tail_label, ED_xlabel, bezier::eflag, bezier::ep, bezier::list, offset, bezier::sflag, bezier::size, bezier::sp, pointf_s::x, and pointf_s::y.

Referenced by neato_translate().

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◆ translateG()

static void translateG	(	Agraph_t *	g,
		pointf	offset
	)

static

Definition at line 976 of file neatosplines.c.

References GD_bb, GD_clust, GD_label, GD_n_cluster, offset, and translateG().

Referenced by neato_translate(), and translateG().

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Variable Documentation

◆ edgeItemDisc

Dtdisc_t edgeItemDisc

Initial value:

= {
    offsetof(edgeitem, id),
    sizeof(edgeinfo),
    offsetof(edgeitem, link),
    (Dtmake_f) newitem,
    free,
    cmpitems,
}

Definition at line 151 of file neatosplines.c.

Referenced by splineEdges().

◆ sinfo

splineInfo sinfo

static

Initial value:

= {.swapEnds = swap_ends_p,

.splineMerge = spline_merge}

swap_ends_p

static bool swap_ends_p(edge_t *e)

Definition neatosplines.c:36

spline_merge

static bool spline_merge(node_t *n)

Definition neatosplines.c:30

Definition at line 42 of file neatosplines.c.

Referenced by _spline_edges(), makePolyline(), makeSelfArcs(), and makeSpline().

Data Structures

Macros

Functions

Variables

Macro Definition Documentation

◆ BOUNDARY_PORT

Function Documentation

◆ _neato_set_aspect()

◆ _spline_edges()

◆ circumscribed_polygon_corner_about_ellipse()

◆ cmpitems()

◆ ellipse_tangent_slope()

◆ equivEdge()

◆ genPt()

◆ getPath()

◆ line_intersection()

◆ make_barriers()

◆ makeObstacle()

◆ makePolyline()

◆ makeSelfArcs()

◆ makeSpline()

◆ neato_set_aspect()

◆ neato_translate()

◆ newitem()

◆ recPt()

◆ scaleBB()

◆ scaleEdge()

◆ shiftClusters()

◆ spline_edges()

◆ spline_edges0()

◆ spline_edges1()

◆ spline_merge()

◆ splineEdges()

◆ swap_ends_p()

◆ translateE()

◆ translateG()

Variable Documentation

◆ edgeItemDisc

◆ sinfo