arrows.c File Reference

edge arrow shapes More...

#include <assert.h>
#include <common/geomprocs.h>
#include <common/render.h>
#include <math.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <util/startswith.h>
#include <util/streq.h>

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Data Structures
struct	arrowdir_t
struct	arrowname_t
struct	arrowtype_t
struct	triangle

Macros
#define	EPSILON   .0001
#define	ARROW_LENGTH   10.
#define	NUMB_OF_ARROW_HEADS   4
#define	BITS_PER_ARROW   8
#define	BITS_PER_ARROW_TYPE   4
#define	ARR_TYPE_NONE   (ARR_NONE)
#define	ARR_TYPE_NORM   1
#define	ARR_TYPE_CROW   2
#define	ARR_TYPE_TEE   3
#define	ARR_TYPE_BOX   4
#define	ARR_TYPE_DIAMOND   5
#define	ARR_TYPE_DOT   6
#define	ARR_TYPE_CURVE   7
#define	ARR_TYPE_GAP   8
#define	ARR_MOD_OPEN   (1<<(BITS_PER_ARROW_TYPE+0))
#define	ARR_MOD_INV   (1<<(BITS_PER_ARROW_TYPE+1))
#define	ARR_MOD_LEFT   (1<<(BITS_PER_ARROW_TYPE+2))
#define	ARR_MOD_RIGHT   (1<<(BITS_PER_ARROW_TYPE+3))

Functions
static pointf	arrow_type_normal (GVJ_t *job, pointf p, pointf u, double arrowsize, double penwidth, uint32_t flag)
static pointf	arrow_type_crow (GVJ_t *job, pointf p, pointf u, double arrowsize, double penwidth, uint32_t flag)
static pointf	arrow_type_tee (GVJ_t *job, pointf p, pointf u, double arrowsize, double penwidth, uint32_t flag)
static pointf	arrow_type_box (GVJ_t *job, pointf p, pointf u, double arrowsize, double penwidth, uint32_t flag)
static pointf	arrow_type_diamond (GVJ_t *job, pointf p, pointf u, double arrowsize, double penwidth, uint32_t flag)
static pointf	arrow_type_dot (GVJ_t *job, pointf p, pointf u, double arrowsize, double penwidth, uint32_t flag)
static pointf	arrow_type_curve (GVJ_t *job, pointf p, pointf u, double arrowsize, double penwidth, uint32_t flag)
static pointf	arrow_type_gap (GVJ_t *job, pointf p, pointf u, double arrowsize, double penwidth, uint32_t flag)
static double	arrow_length_generic (double lenfact, double arrowsize, double penwidth, uint32_t flag)
static double	arrow_length_crow (double lenfact, double arrowsize, double penwidth, uint32_t flag)
static double	arrow_length_normal (double lenfact, double arrowsize, double penwidth, uint32_t flag)
static double	arrow_length_tee (double lenfact, double arrowsize, double penwidth, uint32_t flag)
static double	arrow_length_box (double lenfact, double arrowsize, double penwidth, uint32_t flag)
static double	arrow_length_diamond (double lenfact, double arrowsize, double penwidth, uint32_t flag)
static double	arrow_length_curve (double lenfact, double arrowsize, double penwidth, uint32_t flag)
static double	arrow_length_dot (double lenfact, double arrowsize, double penwidth, uint32_t flag)
static char *	arrow_match_name_frag (char *name, const arrowname_t *arrownames, uint32_t *flag)
static char *	arrow_match_shape (char *name, uint32_t *flag)
static void	arrow_match_name (char *name, uint32_t *flag)
void	arrow_flags (Agedge_t *e, uint32_t *sflag, uint32_t *eflag)
static double	arrow_length (edge_t *e, uint32_t flag)
static bool	inside (inside_t *inside_context, pointf p)
size_t	arrowEndClip (edge_t *e, pointf *ps, size_t startp, size_t endp, bezier *spl, uint32_t eflag)
size_t	arrowStartClip (edge_t *e, pointf *ps, size_t startp, size_t endp, bezier *spl, uint32_t sflag)
void	arrowOrthoClip (edge_t *e, pointf *ps, size_t startp, size_t endp, bezier *spl, uint32_t sflag, uint32_t eflag)
static triangle	miter_shape (pointf base_left, pointf P, pointf base_right, double penwidth)
static pointf	arrow_type_normal0 (pointf p, pointf u, double penwidth, uint32_t flag, pointf *a)
static pointf	arrow_type_crow0 (pointf p, pointf u, double arrowsize, double penwidth, uint32_t flag, pointf *a)
static pointf	arrow_type_diamond0 (pointf p, pointf u, double penwidth, uint32_t flag, pointf *a)
static pointf	arrow_gen_type (GVJ_t *job, pointf p, pointf u, double arrowsize, double penwidth, uint32_t flag)
boxf	arrow_bb (pointf p, pointf u, double arrowsize)
void	arrow_gen (GVJ_t *job, emit_state_t emit_state, pointf p, pointf u, double arrowsize, double penwidth, uint32_t flag)

Variables
static const arrowdir_t	Arrowdirs []
static const arrowname_t	Arrowsynonyms []
static const arrowname_t	Arrowmods []
static const arrowname_t	Arrownames []
static const arrowtype_t	Arrowtypes []
static const size_t	Arrowtypes_size

Macro Definition Documentation

ARR_MOD_INV

#define ARR_MOD_INV   (1<<(BITS_PER_ARROW_TYPE+1))

Definition at line 50 of file arrows.c.

ARR_MOD_LEFT

#define ARR_MOD_LEFT   (1<<(BITS_PER_ARROW_TYPE+2))

Definition at line 51 of file arrows.c.

ARR_MOD_OPEN

#define ARR_MOD_OPEN   (1<<(BITS_PER_ARROW_TYPE+0))

Definition at line 49 of file arrows.c.

ARR_MOD_RIGHT

#define ARR_MOD_RIGHT   (1<<(BITS_PER_ARROW_TYPE+3))

Definition at line 52 of file arrows.c.

ARR_TYPE_BOX

#define ARR_TYPE_BOX   4

Definition at line 41 of file arrows.c.

ARR_TYPE_CROW

#define ARR_TYPE_CROW   2

Definition at line 39 of file arrows.c.

ARR_TYPE_CURVE

#define ARR_TYPE_CURVE   7

Definition at line 44 of file arrows.c.

ARR_TYPE_DIAMOND

#define ARR_TYPE_DIAMOND   5

Definition at line 42 of file arrows.c.

ARR_TYPE_DOT

#define ARR_TYPE_DOT   6

Definition at line 43 of file arrows.c.

ARR_TYPE_GAP

#define ARR_TYPE_GAP   8

Definition at line 45 of file arrows.c.

ARR_TYPE_NONE

#define ARR_TYPE_NONE   (ARR_NONE)

Definition at line 37 of file arrows.c.

ARR_TYPE_NORM

#define ARR_TYPE_NORM   1

Definition at line 38 of file arrows.c.

ARR_TYPE_TEE

#define ARR_TYPE_TEE   3

Definition at line 40 of file arrows.c.

ARROW_LENGTH

#define ARROW_LENGTH   10.

Definition at line 28 of file arrows.c.

BITS_PER_ARROW

#define BITS_PER_ARROW   8

Definition at line 33 of file arrows.c.

BITS_PER_ARROW_TYPE

#define BITS_PER_ARROW_TYPE   4

Definition at line 35 of file arrows.c.

EPSILON

#define EPSILON   .0001

Definition at line 25 of file arrows.c.

NUMB_OF_ARROW_HEADS

#define NUMB_OF_ARROW_HEADS   4

Definition at line 30 of file arrows.c.

Function Documentation

arrow_bb()

boxf arrow_bb	(	pointf	p,
		pointf	u,
		double	arrowsize
	)

Definition at line 1112 of file arrows.c.

References ARROW_LENGTH, dx, dy, EPSILON, boxf::LL, boxf::UR, pointf_s::x, and pointf_s::y.

Referenced by init_splines_bb(), and overlap_arrow().

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arrow_flags()

void arrow_flags	(	Agedge_t *	e,
		uint32_t *	sflag,
		uint32_t *	eflag
	)

Definition at line 217 of file arrows.c.

References agfindedge, agfindedgeattr, aghead, agisdirected(), agraphof(), agtail, agxget(), ARR_TYPE_NONE, ARR_TYPE_NORM, arrow_flags(), arrow_match_name(), Arrowdirs, arrowdir_t::dir, E_dir, ED_conc_opp_flag, NULL, and streq().

Referenced by arrow_clip(), arrow_flags(), and user_spline().

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arrow_gen()

void arrow_gen	(	GVJ_t *	job,
		emit_state_t	emit_state,
		pointf	p,
		pointf	u,
		double	arrowsize,
		double	penwidth,
		uint32_t	flag
	)

Definition at line 1150 of file arrows.c.

References ARR_TYPE_NONE, arrow_gen_type(), ARROW_LENGTH, BITS_PER_ARROW, GVC_s::defaultlinestyle, obj_state_s::emit_state, EPSILON, GVJ_s::gvc, gvrender_set_penwidth(), gvrender_set_style(), NUMB_OF_ARROW_HEADS, GVJ_s::obj, penwidth, pointf_s::x, and pointf_s::y.

Referenced by emit_edge_graphics(), and multicolor().

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arrow_gen_type()

static pointf arrow_gen_type ( GVJ_t *  job, pointf  p, pointf  u, double  arrowsize, double  penwidth, uint32_t  flag  )

static

Definition at line 1097 of file arrows.c.

References Arrowtypes, Arrowtypes_size, BITS_PER_ARROW_TYPE, arrowtype_t::gen, arrowtype_t::lenfact, penwidth, arrowtype_t::type, pointf_s::x, and pointf_s::y.

Referenced by arrow_gen().

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arrow_length()

static double arrow_length ( edge_t *  e, uint32_t  flag  )

static

Definition at line 252 of file arrows.c.

References Arrowtypes, Arrowtypes_size, BITS_PER_ARROW, BITS_PER_ARROW_TYPE, E_arrowsz, E_penwidth, late_double(), arrowtype_t::len, arrowtype_t::lenfact, NUMB_OF_ARROW_HEADS, penwidth, and arrowtype_t::type.

Referenced by arrowEndClip(), arrowOrthoClip(), and arrowStartClip().

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arrow_length_box()

static double arrow_length_box ( double  lenfact, double  arrowsize, double  penwidth, uint32_t  flag  )

static

Definition at line 1261 of file arrows.c.

References ARROW_LENGTH, and penwidth.

arrow_length_crow()

static double arrow_length_crow ( double  lenfact, double  arrowsize, double  penwidth, uint32_t  flag  )

static

Definition at line 1327 of file arrows.c.

References ARR_MOD_INV, ARROW_LENGTH, arrow_type_crow0(), overlap(), penwidth, pointf_s::x, and pointf_s::y.

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arrow_length_curve()

static double arrow_length_curve ( double  lenfact, double  arrowsize, double  penwidth, uint32_t  flag  )

static

Definition at line 1320 of file arrows.c.

References ARROW_LENGTH, and penwidth.

arrow_length_diamond()

static double arrow_length_diamond ( double  lenfact, double  arrowsize, double  penwidth, uint32_t  flag  )

static

Definition at line 1272 of file arrows.c.

References ARROW_LENGTH, arrow_type_diamond0(), overlap(), penwidth, pointf_s::x, and pointf_s::y.

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arrow_length_dot()

static double arrow_length_dot ( double  lenfact, double  arrowsize, double  penwidth, uint32_t  flag  )

static

Definition at line 1313 of file arrows.c.

References ARROW_LENGTH, and penwidth.

arrow_length_generic()

static double arrow_length_generic ( double  lenfact, double  arrowsize, double  penwidth, uint32_t  flag  )

static

Definition at line 1187 of file arrows.c.

References ARROW_LENGTH, and penwidth.

arrow_length_normal()

static double arrow_length_normal ( double  lenfact, double  arrowsize, double  penwidth, uint32_t  flag  )

static

Definition at line 1195 of file arrows.c.

References ARR_MOD_INV, ARROW_LENGTH, arrow_type_normal0(), overlap(), penwidth, pointf_s::x, and pointf_s::y.

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arrow_length_tee()

static double arrow_length_tee ( double  lenfact, double  arrowsize, double  penwidth, uint32_t  flag  )

static

Definition at line 1234 of file arrows.c.

References ARROW_LENGTH, and penwidth.

arrow_match_name()

static void arrow_match_name ( char *  name, uint32_t *  flag  )

static

Definition at line 194 of file arrows.c.

References agwarningf(), ARR_TYPE_GAP, ARR_TYPE_NONE, arrow_match_shape(), BITS_PER_ARROW, and NUMB_OF_ARROW_HEADS.

Referenced by arrow_flags().

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arrow_match_name_frag()

static char * arrow_match_name_frag ( char *  name, const arrowname_t *  arrownames, uint32_t *  flag  )

static

Definition at line 159 of file arrows.c.

References arrowname_t::name, and startswith().

Referenced by arrow_match_shape().

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arrow_match_shape()

static char * arrow_match_shape ( char *  name, uint32_t *  flag  )

static

Definition at line 176 of file arrows.c.

References ARR_TYPE_NONE, ARR_TYPE_NORM, arrow_match_name_frag(), Arrowmods, Arrownames, Arrowsynonyms, and BITS_PER_ARROW_TYPE.

Referenced by arrow_match_name().

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arrow_type_box()

static pointf arrow_type_box ( GVJ_t *  job, pointf  p, pointf  u, double  arrowsize, double  penwidth, uint32_t  flag  )

static

Definition at line 873 of file arrows.c.

References ARR_MOD_LEFT, ARR_MOD_OPEN, ARR_MOD_RIGHT, delta, gvrender_polygon(), gvrender_polyline(), penwidth, pointf_s::x, and pointf_s::y.

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arrow_type_crow()

static pointf arrow_type_crow ( GVJ_t *  job, pointf  p, pointf  u, double  arrowsize, double  penwidth, uint32_t  flag  )

static

Definition at line 779 of file arrows.c.

References ARR_MOD_LEFT, ARR_MOD_RIGHT, arrow_type_crow0(), gvrender_polygon(), and penwidth.

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arrow_type_crow0()

static pointf arrow_type_crow0 ( pointf  p, pointf  u, double  arrowsize, double  penwidth, uint32_t  flag, pointf *  a  )

static

Definition at line 637 of file arrows.c.

References add_pointf(), alpha, ARR_MOD_INV, ARR_MOD_LEFT, ARR_MOD_RIGHT, miter_shape(), penwidth, triangle::points, sub_pointf(), pointf_s::x, and pointf_s::y.

Referenced by arrow_length_crow(), and arrow_type_crow().

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arrow_type_curve()

static pointf arrow_type_curve ( GVJ_t *  job, pointf  p, pointf  u, double  arrowsize, double  penwidth, uint32_t  flag  )

static

Definition at line 1036 of file arrows.c.

References ARR_MOD_INV, ARR_MOD_LEFT, ARR_MOD_RIGHT, Bezier(), delta, gvrender_beziercurve(), gvrender_polyline(), NULL, penwidth, pointf_s::x, and pointf_s::y.

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arrow_type_diamond()

static pointf arrow_type_diamond ( GVJ_t *  job, pointf  p, pointf  u, double  arrowsize, double  penwidth, uint32_t  flag  )

static

Definition at line 973 of file arrows.c.

References ARR_MOD_LEFT, ARR_MOD_OPEN, ARR_MOD_RIGHT, arrow_type_diamond0(), gvrender_polygon(), and penwidth.

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arrow_type_diamond0()

static pointf arrow_type_diamond0 ( pointf  p, pointf  u, double  penwidth, uint32_t  flag, pointf *  a  )

static

Definition at line 931 of file arrows.c.

References add_pointf(), ARR_MOD_LEFT, ARR_MOD_RIGHT, delta, miter_shape(), penwidth, triangle::points, scale(), sub_pointf(), pointf_s::x, and pointf_s::y.

Referenced by arrow_length_diamond(), and arrow_type_diamond().

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arrow_type_dot()

static pointf arrow_type_dot ( GVJ_t *  job, pointf  p, pointf  u, double  arrowsize, double  penwidth, uint32_t  flag  )

static

Definition at line 992 of file arrows.c.

References ARR_MOD_OPEN, delta, gvrender_ellipse(), penwidth, pointf_s::x, and pointf_s::y.

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arrow_type_gap()

static pointf arrow_type_gap ( GVJ_t *  job, pointf  p, pointf  u, double  arrowsize, double  penwidth, uint32_t  flag  )

static

Definition at line 796 of file arrows.c.

References gvrender_polyline(), penwidth, pointf_s::x, and pointf_s::y.

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arrow_type_normal()

static pointf arrow_type_normal ( GVJ_t *  job, pointf  p, pointf  u, double  arrowsize, double  penwidth, uint32_t  flag  )

static

Definition at line 618 of file arrows.c.

References ARR_MOD_LEFT, ARR_MOD_OPEN, ARR_MOD_RIGHT, arrow_type_normal0(), gvrender_polygon(), and penwidth.

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arrow_type_normal0()

static pointf arrow_type_normal0 ( pointf  p, pointf  u, double  penwidth, uint32_t  flag, pointf *  a  )

static

Definition at line 521 of file arrows.c.

References alpha, ARR_MOD_INV, ARR_MOD_LEFT, ARR_MOD_RIGHT, miter_shape(), penwidth, triangle::points, sub_pointf(), pointf_s::x, and pointf_s::y.

Referenced by arrow_length_normal(), and arrow_type_normal().

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arrow_type_tee()

static pointf arrow_type_tee ( GVJ_t *  job, pointf  p, pointf  u, double  arrowsize, double  penwidth, uint32_t  flag  )

static

Definition at line 813 of file arrows.c.

References ARR_MOD_LEFT, ARR_MOD_RIGHT, delta, gvrender_polygon(), gvrender_polyline(), penwidth, sub_pointf(), pointf_s::x, and pointf_s::y.

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arrowEndClip()

size_t arrowEndClip	(	edge_t *	e,
		pointf *	ps,
		size_t	startp,
		size_t	endp,
		bezier *	spl,
		uint32_t	eflag
	)

Definition at line 284 of file arrows.c.

References inside_t::a, arrow_length(), bezier_clip(), DIST2, bezier::eflag, bezier::ep, inside(), inside_t::p, ps, and inside_t::r.

Referenced by arrow_clip(), and makeCompoundEdge().

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arrowOrthoClip()

void arrowOrthoClip	(	edge_t *	e,
		pointf *	ps,
		size_t	startp,
		size_t	endp,
		bezier *	spl,
		uint32_t	sflag,
		uint32_t	eflag
	)

Definition at line 355 of file arrows.c.

References arrow_length(), DIST, bezier::eflag, bezier::ep, ps, bezier::sflag, bezier::sp, pointf_s::x, and pointf_s::y.

Referenced by arrow_clip().

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arrowStartClip()

size_t arrowStartClip	(	edge_t *	e,
		pointf *	ps,
		size_t	startp,
		size_t	endp,
		bezier *	spl,
		uint32_t	sflag
	)

Definition at line 315 of file arrows.c.

References inside_t::a, arrow_length(), bezier_clip(), DIST2, inside(), inside_t::p, ps, inside_t::r, bezier::sflag, and bezier::sp.

Referenced by arrow_clip(), and makeCompoundEdge().

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inside()

static bool inside ( inside_t *  inside_context, pointf  p  )

static

Definition at line 279 of file arrows.c.

References inside_t::a, DIST2, inside_t::p, and inside_t::r.

Referenced by arrowEndClip(), arrowStartClip(), and bezier_clip().

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miter_shape()

static triangle miter_shape ( pointf  base_left, pointf  P, pointf  base_right, double  penwidth  )

static

Definition at line 455 of file arrows.c.

References A, alpha, B, M_PI, penwidth, pointf_s::x, and pointf_s::y.

Referenced by arrow_type_crow0(), arrow_type_diamond0(), and arrow_type_normal0().

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Variable Documentation

Arrowdirs

const arrowdir_t Arrowdirs[]

static

Initial value:

= {
    {"forward", ARR_TYPE_NONE, ARR_TYPE_NORM},
    {"back", ARR_TYPE_NORM, ARR_TYPE_NONE},
    {"both", ARR_TYPE_NORM, ARR_TYPE_NORM},
    {"none", ARR_TYPE_NONE, ARR_TYPE_NONE},
    {0}
}

Definition at line 61 of file arrows.c.

Referenced by arrow_flags().

Arrowmods

const arrowname_t Arrowmods[]

static

Initial value:

= {
    {"o", ARR_MOD_OPEN},
    {"r", ARR_MOD_RIGHT},
    {"l", ARR_MOD_LEFT},
    
    {"e", ARR_MOD_OPEN},        
    {"half", ARR_MOD_LEFT},     
    {0}
}

Definition at line 81 of file arrows.c.

Referenced by arrow_match_shape().

Arrownames

const arrowname_t Arrownames[]

static

Initial value:

= {
    {"normal", ARR_TYPE_NORM},
    {"crow", ARR_TYPE_CROW},
    {"tee", ARR_TYPE_TEE},
    {"box", ARR_TYPE_BOX},
    {"diamond", ARR_TYPE_DIAMOND},
    {"dot", ARR_TYPE_DOT},
    {"none", ARR_TYPE_GAP},
    
    {"inv", (ARR_TYPE_NORM | ARR_MOD_INV)},
    {"vee", (ARR_TYPE_CROW | ARR_MOD_INV)},
    
    
    
    {"pen", (ARR_TYPE_CROW | ARR_MOD_INV)},
    
    
    
    {"mpty", ARR_TYPE_NORM},
    {"curve", ARR_TYPE_CURVE},
    {"icurve", (ARR_TYPE_CURVE | ARR_MOD_INV)},
    {0}
}

Definition at line 91 of file arrows.c.

Referenced by arrow_match_shape().

Arrowsynonyms

const arrowname_t Arrowsynonyms[]

static

Initial value:

= {
    
    
    {"invempty", (ARR_TYPE_NORM | ARR_MOD_INV | ARR_MOD_OPEN)}, 
    {0}
}

Definition at line 74 of file arrows.c.

Referenced by arrow_match_shape().

Arrowtypes

const arrowtype_t Arrowtypes[]

static

Initial value:

= {
    {ARR_TYPE_NORM, 1.0, arrow_type_normal, arrow_length_normal},
    {ARR_TYPE_CROW, 1.0, arrow_type_crow, arrow_length_crow},
    {ARR_TYPE_TEE, 0.5, arrow_type_tee, arrow_length_tee},
    {ARR_TYPE_BOX, 1.0, arrow_type_box, arrow_length_box},
    {ARR_TYPE_DIAMOND, 1.2, arrow_type_diamond, arrow_length_diamond},
    {ARR_TYPE_DOT, 0.8, arrow_type_dot, arrow_length_dot},
    {ARR_TYPE_CURVE, 1.0, arrow_type_curve, arrow_length_curve},
    {ARR_TYPE_GAP, 0.5, arrow_type_gap, arrow_length_generic},
}

Definition at line 145 of file arrows.c.

Referenced by arrow_gen_type(), and arrow_length().

Arrowtypes_size

const size_t Arrowtypes_size

static

Initial value:

=
  sizeof(Arrowtypes) / sizeof(Arrowtypes[0])

Definition at line 156 of file arrows.c.

Referenced by arrow_gen_type(), and arrow_length().