Files
file	WlzBoundaryUtils.c
	Simple functions that operate on boundary lists.

file	WlzBoundToObj.c
	Functions to convert a boundary object or domain to a domain object.

file	WlzObjToBoundary.c
	Computes a boundary list from a Woolz object.

Data Structures
struct	_WlzBoundList
	A complete list of a set of boundaries which is encoded in tree form. More...

Functions
WlzErrorNum	WlzBoundaryToPolyObjArray (WlzObject bndObj, int dstNumObjs, WlzObject ***dstObjArray)
	decomposes a boundary into it's component polygons. More...

WlzErrorNum	WlzBoundObjToPolyDomArray (WlzObject bndObj, int dstArySz, WlzPolygonDomain ***dstPolyAry)
	Given a boundary list object returns a simple array of polygon domains. More...

int	WlzBoundPolyCount (WlzBoundList bnd, WlzErrorNum dstErr)
	Count the number of polygon domains in a boundary list. More...

int	WlzBoundVtxCount (WlzBoundList bnd, WlzErrorNum dstErr)
	Recursive function which counts the total number of vertices in a boundary list. More...

WlzObject *	WlzBoundaryDomain (WlzObject gvnObj, WlzErrorNum dstErr)
	Computes a new domain object with pixels/voxels only at the boundary of the given object. More...

WlzObject *	WlzBoundaryToObj (WlzObject boundary, WlzPolyFillMode fillMode, WlzErrorNum dstErr)
	Return a domain object corresponding to the input boundary object. More...

WlzObject *	WlzBoundToObj (WlzBoundList bound, WlzPolyFillMode fillMode, WlzErrorNum dstNum)
	Convert the input boundary list to a domain object. Use WlzBoundaryToObj if conversion of a 3D stack of boundary list is required or if the boundary is available as a first class object. More...

WlzObject *	WlzObjToBoundary (WlzObject obj, int wrap, WlzErrorNum dstErr)
	Computes a recursive boundary structure for the given input object, with the specified number of vertices repeated in each boundary polygon to ensure wrap-around. All boundary polygon arcs lie in one of the 8 directions vertical, horizontal, diagonal. More...

WlzBoundList *	WlzBoundDecimate (WlzBoundList bound, double maxDist, WlzErrorNum dstErr)
	Decimate a boundary list using WlzPolyDecimate() on the boundary polylines. More...

WlzBoundList *	WlzBoundSmooth (WlzBoundList bound, int iterations, WlzErrorNum dstErr)
	Smooth a boundary list using WlzPolySmooth(). More...

WlzObject *	WlzBoundTo8Bound (WlzObject gvnObj, WlzErrorNum dstErr)
	Computes a new boundary list from the given one, such that the new boundary list has 8-connected polylines. More...

Detailed Description

Function Documentation

◆ WlzBoundaryToPolyObjArray()

WlzErrorNum WlzBoundaryToPolyObjArray	(	WlzObject *	bndObj,
		int *	dstNumObjs,
		WlzObject ***	dstObjArray
	)

decomposes a boundary into it's component polygons.

Returns: Woolz error code.

Parameters

bndObj	Given boundary.
dstNumObjs	Destination pointer for the number of polygons.
dstObjArray	Destination pointer for the array of polygons.

References AlcFree(), AlcMalloc(), _WlzValues::core, _WlzDomain::poly, WLZ_2D_POLYGON, WLZ_ERR_MEM_ALLOC, WLZ_ERR_NONE, WLZ_ERR_OBJECT_NULL, WLZ_ERR_PARAM_NULL, WlzAssignObject(), WlzBoundObjToPolyDomArray(), WlzFreePolyDmn(), and WlzMakeMain().

◆ WlzBoundObjToPolyDomArray()

WlzErrorNum WlzBoundObjToPolyDomArray	(	WlzObject *	bndObj,
		int *	dstArySz,
		WlzPolygonDomain ***	dstPolyAry
	)

Given a boundary list object returns a simple array of polygon domains.

Returns: Array of polygon domains.

Parameters

bndObj	Given boundary list object.
dstArySz	Destination ptr for array size.
dstPolyAry	Destination ptr for the array.

References AlcMalloc(), _WlzDomain::b, _WlzObject::domain, _WlzObject::type, WLZ_BOUNDLIST, WLZ_ERR_DOMAIN_NULL, WLZ_ERR_MEM_ALLOC, WLZ_ERR_NONE, WLZ_ERR_OBJECT_NULL, WLZ_ERR_OBJECT_TYPE, WLZ_ERR_PARAM_NULL, and WlzBoundPolyCount().

Referenced by WlzBoundaryToPolyObjArray().

◆ WlzBoundPolyCount()

int WlzBoundPolyCount	(	WlzBoundList *	bnd,
		WlzErrorNum *	dstErr
	)

Count the number of polygon domains in a boundary list.

Returns: The number of polygon domains in the given boundary list.

Parameters

bnd	Given boundary list.
dstErr	Destination ptr for error, may be NULL.

References WLZ_ERR_DOMAIN_NULL, and WLZ_ERR_NONE.

Referenced by WlzBoundObjToPolyDomArray().

◆ WlzBoundVtxCount()

int WlzBoundVtxCount	(	WlzBoundList *	bnd,
		WlzErrorNum *	dstErr
	)

Recursive function which counts the total number of vertices in a boundary list.

Returns

Parameters

bnd	Given boundary list.
dstErr	Destination error pointer, may be NULL.

References _WlzBoundList::down, _WlzBoundList::next, _WlzPolygonDomain::nvertices, _WlzBoundList::poly, WLZ_ERR_DOMAIN_NULL, and WLZ_ERR_NONE.

◆ WlzBoundaryDomain()

WlzObject* WlzBoundaryDomain	(	WlzObject *	gvnObj,
		WlzErrorNum *	dstErr
	)

Computes a new domain object with pixels/voxels only at the boundary of the given object.

Returns

New domain object.

            The boundary pixels/voxels are computed using erosion and
            diffdom. The alternative of computing the boundary and then
            filling along polygon vertices gets it wrong in places.

Parameters

gvnObj	Given object.
dstErr	Destination error pointer, may be NULL.

References _WlzObject::type, WLZ_26_CONNECTED, WLZ_2D_DOMAINOBJ, WLZ_3D_DOMAINOBJ, WLZ_8_CONNECTED, WLZ_ERR_NONE, WLZ_ERR_OBJECT_NULL, WLZ_ERR_OBJECT_TYPE, WlzAssignObject(), WlzDiffDomain(), WlzErosion(), and WlzFreeObj().

Referenced by WlzDomainFill3D(), WlzLineSkeleton(), WlzLineSkeletonSegment(), and WlzPointsFromDomObj().

◆ WlzBoundaryToObj()

WlzObject* WlzBoundaryToObj	(	WlzObject *	boundary,
		WlzPolyFillMode	fillMode,
		WlzErrorNum *	dstErr
	)

Return a domain object corresponding to the input boundary object.

Returns: Domain object corresponding to the input boundary, NULL on error.

Parameters

boundary	Input boundary object.
fillMode	Fill mode for the individual polyline boundaries. If the input object is a genuine boundary object then there will be no self-intersecting polylines and `fillMode = WLZ_SIMPLE_FILL` is appropriate. See WlzPolyToObj().
dstErr	Error return

Source:: WlzBoundToObj.c

References _WlzDomain::b, _WlzValues::core, _WlzObject::domain, _WlzPlaneDomain::domains, _WlzPlaneDomain::kol1, _WlzPlaneDomain::lastkl, _WlzPlaneDomain::lastln, _WlzPlaneDomain::lastpl, _WlzPlaneDomain::line1, _WlzValues::obj, _WlzDomain::p, _WlzPlaneDomain::plane1, _WlzObject::type, _WlzPlaneDomain::type, _WlzObject::values, _WlzPlaneDomain::voxel_size, WLZ_3D_DOMAINOBJ, WLZ_BOUNDLIST, WLZ_EMPTY_DOMAIN, WLZ_EMPTY_OBJ, WLZ_ERR_DOMAIN_NULL, WLZ_ERR_DOMAIN_TYPE, WLZ_ERR_NONE, WLZ_ERR_OBJECT_NULL, WLZ_ERR_OBJECT_TYPE, WLZ_PLANEDOMAIN_BOUNDLIST, WLZ_PLANEDOMAIN_DOMAIN, WLZ_TRANS_OBJ, WlzAssignDomain(), WlzBoundToObj(), WlzFreeObj(), WlzFreePlaneDomain(), WlzMakeEmpty(), WlzMakeMain(), and WlzMakePlaneDomain().

◆ WlzBoundToObj()

WlzObject* WlzBoundToObj	(	WlzBoundList *	bound,
		WlzPolyFillMode	fillMode,
		WlzErrorNum *	dstNum
	)

Convert the input boundary list to a domain object. Use WlzBoundaryToObj if conversion of a 3D stack of boundary list is required or if the boundary is available as a first class object.

Returns: Domain object corresponding to the input boundary domain, NULL on error.

Parameters

bound	Input boundary list domain.
fillMode	Polyline fill mode, see WlzPolyToObj().
dstNum	Error return.

Source:: WlzBoundToObj.c

References _WlzBoundList::down, _WlzBoundList::next, _WlzBoundList::poly, _WlzBoundList::type, WLZ_4_CONNECTED, WLZ_BOUNDLIST_PIECE, WLZ_ERR_NONE, WLZ_ERR_OBJECT_NULL, WLZ_VERTEX_FILL, WlzDiffDomain(), WlzErosion(), WlzFreeObj(), WlzPolyToObj(), and WlzUnion2().

Referenced by WlzBoundaryToObj(), and WlzDomainFill().

◆ WlzObjToBoundary()

WlzObject* WlzObjToBoundary	(	WlzObject *	obj,
		int	wrap,
		WlzErrorNum *	dstErr
	)

Computes a recursive boundary structure for the given input object, with the specified number of vertices repeated in each boundary polygon to ensure wrap-around. All boundary polygon arcs lie in one of the 8 directions vertical, horizontal, diagonal.

Returns: New boundary object, NULL on error.

Parameters

obj	Given input object.
wrap	Number of overlapping vertices within each polygon.
dstErr	Destination error pointer, mat be NULL.

References _WlzDomain::b, _WlzValues::core, _WlzDomain::core, _WlzObject::domain, _WlzPlaneDomain::domains, _WlzBoundList::down, _WlzBoundList::freeptr, _WlzDomain::i, _WlzPlaneDomain::kol1, _WlzPlaneDomain::lastkl, _WlzPlaneDomain::lastln, _WlzPlaneDomain::lastpl, _WlzPlaneDomain::line1, _WlzBoundList::linkcount, _WlzBoundList::next, _WlzValues::obj, _WlzDomain::p, _WlzPlaneDomain::plane1, _WlzDomain::poly, _WlzBoundList::poly, _WlzObject::type, _WlzPlaneDomain::type, _WlzBoundList::type, _WlzBoundList::up, _WlzObject::values, _WlzPlaneDomain::voxel_size, WLZ_2D_DOMAINOBJ, WLZ_2D_POLYGON, WLZ_3D_DOMAINOBJ, WLZ_BOUNDLIST, WLZ_BOUNDLIST_HOLE, WLZ_BOUNDLIST_PIECE, WLZ_EMPTY_DOMAIN, WLZ_EMPTY_OBJ, WLZ_ERR_DOMAIN_NULL, WLZ_ERR_DOMAIN_TYPE, WLZ_ERR_NONE, WLZ_ERR_OBJECT_NULL, WLZ_ERR_OBJECT_TYPE, WLZ_PLANEDOMAIN_BOUNDLIST, WLZ_PLANEDOMAIN_DOMAIN, WLZ_PLANEDOMAIN_POLYGON, WLZ_TRANS_OBJ, WlzAssignDomain(), WlzFreeObj(), WlzFreePlaneDomain(), WlzIntervalCount(), WlzMakeBoundList(), WlzMakeMain(), WlzMakePlaneDomain(), and _WlzBoundList::wrap.

Referenced by WlzCMeshCompSurfMapToDomain(), WlzDomainFill(), WlzDomainFill3D(), WlzObjToConvexHull(), WlzTransposeObj(), and WlzVerticesFromObjBnd2I().

◆ WlzBoundDecimate()

WlzBoundList* WlzBoundDecimate	(	WlzBoundList *	bound,
		double	maxDist,
		WlzErrorNum *	dstErr
	)

Decimate a boundary list using WlzPolyDecimate() on the boundary polylines.

Returns: decimated boundary list, NULL on error

Parameters

bound	input boundary list
maxDist	distance parameter to test for vertex removal
dstErr	error return

Source:: WlzPolyDecimate.c

References _WlzBoundList::down, _WlzBoundList::next, _WlzBoundList::poly, _WlzBoundList::type, WLZ_ERR_DOMAIN_NULL, WLZ_ERR_NONE, WlzAssignBoundList(), WlzAssignPolygonDomain(), WlzFreeBoundList(), WlzMakeBoundList(), WlzPolyDecimate(), and _WlzBoundList::wrap.

◆ WlzBoundSmooth()

WlzBoundList* WlzBoundSmooth	(	WlzBoundList *	bound,
		int	iterations,
		WlzErrorNum *	dstErr
	)

Smooth a boundary list using WlzPolySmooth().

Returns: new boundlist, NULL on error

Parameters

bound	input boundary list
iterations	number of iterations for smoothing the polylines
dstErr	error return

Source:: WlzPolySmooth.c

References _WlzBoundList::down, _WlzBoundList::next, _WlzBoundList::poly, _WlzBoundList::type, WLZ_ERR_DOMAIN_NULL, WLZ_ERR_NONE, WlzAssignBoundList(), WlzAssignPolygonDomain(), WlzFreeBoundList(), WlzMakeBoundList(), WlzPolySmooth(), and _WlzBoundList::wrap.

◆ WlzBoundTo8Bound()

WlzObject* WlzBoundTo8Bound	(	WlzObject *	gvnObj,
		WlzErrorNum *	dstErr
	)

Computes a new boundary list from the given one, such that the new boundary list has 8-connected polylines.

Returns: New object with boundary list or NULL on error.

Parameters

gvnObj	Object with given boundary list.
dstErr	Destination error pointer, may be NULL.

References _WlzDomain::b, _WlzValues::core, _WlzDomain::core, _WlzObject::domain, _WlzBoundList::next, _WlzBoundList::poly, _WlzObject::type, _WlzBoundList::type, WLZ_BOUNDLIST, WLZ_ERR_DOMAIN_NULL, WLZ_ERR_DOMAIN_TYPE, WLZ_ERR_NONE, WLZ_ERR_OBJECT_NULL, WlzFreeObj(), WlzMakeBoundList(), WlzPolyTo8Polygon(), and _WlzBoundList::wrap.

Files

Data Structures

Functions

Detailed Description

Function Documentation

◆ WlzBoundaryToPolyObjArray()

◆ WlzBoundObjToPolyDomArray()

◆ WlzBoundPolyCount()

◆ WlzBoundVtxCount()

◆ WlzBoundaryDomain()

◆ WlzBoundaryToObj()

◆ WlzBoundToObj()

◆ WlzObjToBoundary()

◆ WlzBoundDecimate()

◆ WlzBoundSmooth()

◆ WlzBoundTo8Bound()