ON_SubDMesh Class Reference

ON_SubDMesh is used to store a high density traditional quad mesh of a SubD surface or a mesh of a SubD control net. In general, is is better to use an ON_SubDMeshFragmentIterator(subd) that iterates the ON_MeshFragments cached on the ON_SubD. More...

#include <opennurbs_subd.h>

Public Member Functions
	ON_SubDMesh ()=default
	ON_SubDMesh (const ON_SubDMesh &)=default
	~ON_SubDMesh ()=default
unsigned int	AbsoluteSubDDisplayDensity () const
ON_BoundingBox	BoundingBox () const
void	Clear ()
void	ClearTree ()
ON__UINT64	ContentSerialNumber () const
ON_SubDMesh	Copy () const
ON_SubDMesh &	CopyFrom (const ON_SubDMesh &src)
unsigned int	DisplayDensity () const
ON_SubDDisplayParameters	DisplayParameters () const
const ON_SubDMeshFragment *	FaceFragment (const class ON_SubDFace *face) const
const ON_SubDMeshFragment *	FirstFragment () const
	linked list of mesh fragments More...
unsigned int	FragmentCount () const
const ON_RTree &	FragmentTree () const
bool	GetEdgeCenterPointAndNormal (const class ON_SubDEdge *edge, unsigned int edge_face_index, double *P, double *N) const
bool	GetFaceCenterPointAndNormal (const class ON_SubDFace *face, double *P, double *N) const
bool	GetTightBoundingBox (ON_BoundingBox &bbox, bool bGrowBox, const ON_Xform *xform) const
bool	IsEmpty () const
ON_SubDMesh &	operator= (const ON_SubDMesh &)=default
ON_SubD	SubD () const
ON_SubDRef	SubDRef () const
class ON_SubDMeshImpl *	SubLimple () const
unsigned int	SubLimpleUseCount () const
ON_Mesh *	ToMesh (ON_Mesh *destination_mesh) const
ON_Mesh *	ToMesh (unsigned int mesh_density, ON_Mesh *destination_mesh) const
bool	Transform (const ON_Xform &xform)
bool	Update (bool bShareUpdate)

Static Public Member Functions
static ON_SubDMesh *	Create (const ON_SubD &subd, const class ON_SubDDisplayParameters &limit_mesh_parameters, ON_SubDMesh *destination_mesh)
static ON_SubDMesh *	Create (ON_SubDFaceIterator fit, const class ON_SubDDisplayParameters &limit_mesh_parameters, ON_SubDMesh *destination_mesh)
static void	Swap (ON_SubDMesh &a, ON_SubDMesh &b)
static ON_Mesh *	ToMesh (class ON_SubDMeshFragmentIterator &frit, unsigned int mesh_density, ON_Mesh *destination_mesh)

Static Public Attributes
static const ON_SubDMesh	Empty

Friends
class	ON_SubDMeshImpl

Detailed Description

ON_SubDMesh is used to store a high density traditional quad mesh of a SubD surface or a mesh of a SubD control net. In general, is is better to use an ON_SubDMeshFragmentIterator(subd) that iterates the ON_MeshFragments cached on the ON_SubD.

ON_SubDMesh

Constructor & Destructor Documentation

ON_SubDMesh() [1/2]

ON_SubDMesh::ON_SubDMesh ( )

default

~ON_SubDMesh()

ON_SubDMesh::~ON_SubDMesh ( )

default

ON_SubDMesh() [2/2]

ON_SubDMesh::ON_SubDMesh ( const ON_SubDMesh &  )

default

Member Function Documentation

AbsoluteSubDDisplayDensity()

unsigned int ON_SubDMesh::AbsoluteSubDDisplayDensity

(

)

const

Returns: The absolute subd display density used to create this display mesh.

BoundingBox()

ON_BoundingBox ON_SubDMesh::BoundingBox

(

)

const

Clear()

void ON_SubDMesh::Clear

(

)

Description: Clears everything.

ClearTree()

void ON_SubDMesh::ClearTree

(

)

Description: If the tree is not needed and memory resources are tight, then call ClearTree() to remove the RTree.

ContentSerialNumber()

ON__UINT64 ON_SubDMesh::ContentSerialNumber

(

)

const

Returns: A runtime number that changes if the limit mesh content changes. 0: Empty limit mesh Remarks: This is a runtime number. It is not saved in archives and begins at 1 with each new runtime instance of the opennurbs library.

Copy()

ON_SubDMesh ON_SubDMesh::Copy

(

)

const

CopyFrom()

ON_SubDMesh& ON_SubDMesh::CopyFrom

(

const ON_SubDMesh &

src

)

Create() [1/2]

static ON_SubDMesh* ON_SubDMesh::Create ( const ON_SubD &  subd, const class ON_SubDDisplayParameters &  limit_mesh_parameters, ON_SubDMesh *  destination_mesh  )

static

Create() [2/2]

static ON_SubDMesh* ON_SubDMesh::Create ( ON_SubDFaceIterator  fit, const class ON_SubDDisplayParameters &  limit_mesh_parameters, ON_SubDMesh *  destination_mesh  )

static

Description: This version is for expert users who want to take responsibility for managing the subd and limit mesh

DisplayDensity()

unsigned int ON_SubDMesh::DisplayDensity

(

)

const

Deprecated:

AbsoluteSubDDisplayDensity

DisplayParameters()

ON_SubDDisplayParameters ON_SubDMesh::DisplayParameters

(

)

const

FaceFragment()

const ON_SubDMeshFragment* ON_SubDMesh::FaceFragment

(

const class ON_SubDFace *

face

)

const

Parameters: face - [in] Returns: The first fragment for this face or nullptr if none is found. If the face is not a quad, then there will be multiple partial fragments for the face and this is the first on. The others follow using m_next_fragment.

FirstFragment()

const ON_SubDMeshFragment* ON_SubDMesh::FirstFragment

(

)

const

linked list of mesh fragments

FragmentCount()

unsigned int ON_SubDMesh::FragmentCount

(

)

const

FragmentTree()

const ON_RTree& ON_SubDMesh::FragmentTree

(

)

const

Description: The ON__INT_PTRs in the tree are const ON_SubDMeshFragment* pointers.

GetEdgeCenterPointAndNormal()

bool ON_SubDMesh::GetEdgeCenterPointAndNormal	(	const class ON_SubDEdge *	edge,
		unsigned int	edge_face_index,
		double *	P,
		double *	N
	)		const

Description: Get the limit surface point location and normal for the edge's midpoint from the limit mesh grid. Parameters: edge - [in] edge_face_index - [in] Index of the face to use for the normal. If the edge is a crease, then each attached face may have a different normal. Pass 0 when in doubt. P - [out] P = limit surface location or ON_3dPoint::NanPoint if not available. N - [out] N = limit surface unit normal or ON_3dVector::NanVector if not available. Returns: True if the point and normal were set from the limit mesh fragment. False if the limit mesh fragment was not found and nan values were returned.

GetFaceCenterPointAndNormal()

bool ON_SubDMesh::GetFaceCenterPointAndNormal	(	const class ON_SubDFace *	face,
		double *	P,
		double *	N
	)		const

Description: Get the limit surface point location and normal for the face's center from the limit mesh grid. Parameters: face - [in] P - [out] P = limit surface location or ON_3dPoint::NanPoint if not available. N - [out] N = limit surface unit normal or ON_3dVector::NanVector if not available. Returns: True if the point and normal were set from the limit mesh fragment. False if the limit mesh fragment was not found and nan values were returned.

GetTightBoundingBox()

bool ON_SubDMesh::GetTightBoundingBox	(	ON_BoundingBox &	bbox,
		bool	bGrowBox,
		const ON_Xform *	xform
	)		const

IsEmpty()

bool ON_SubDMesh::IsEmpty

(

)

const

operator=()

ON_SubDMesh& ON_SubDMesh::operator= ( const ON_SubDMesh &  )

default

SubD()

ON_SubD ON_SubDMesh::SubD

(

)

const

SubDRef()

ON_SubDRef ON_SubDMesh::SubDRef

(

)

const

SubLimple()

class ON_SubDMeshImpl* ON_SubDMesh::SubLimple

(

)

const

Description: Pretend this function and ON_SubDMeshImpl do not exist. Returns: Something that you are pretending does not exist. Remarks: It is intentional that the definition of ON_SubDMeshImpl class is not available in the opennurbs library interface (not in a header file). The size and design of ON_SubDMeshImpl will change constantly. If you choose to hack and whack so you can dereference an ON_SubDMeshImpl* pointer, then your code will crash unpredictably.

SubLimpleUseCount()

unsigned int ON_SubDMesh::SubLimpleUseCount

(

)

const

Swap()

static void ON_SubDMesh::Swap ( ON_SubDMesh &  a, ON_SubDMesh &  b  )

static

ToMesh() [1/3]

static ON_Mesh* ON_SubDMesh::ToMesh ( class ON_SubDMeshFragmentIterator &  frit, unsigned int  mesh_density, ON_Mesh *  destination_mesh  )

static

Description: Parameters: frit - [in] A fragment iterator from an ON_SubDMesh or ON_SubD. mesh_density - [in] Larger numbers return denser meshes. MinimumMeshDensity() <= mesh_density <= MaximumMeshDensity() destination_mesh - [in] If destination_mesh is not nullptr, then the returned mesh will be store here. Otherwise the returned mesh will be allocated with a call to new ON_Mesh(). Returns: If this limit mesh is not empty, an ON_Mesh representation of this limit mesh. Otherwise, nullptr.

ToMesh() [2/3]

ON_Mesh* ON_SubDMesh::ToMesh

(

ON_Mesh *

destination_mesh

)

const

Description: Parameters: destination_mesh - [in] If destination_mesh is not nullptr, then the returned mesh will be store here. Otherwise the returned mesh will be allocated with a call to new ON_Mesh(). Returns: If this limit mesh is not empty, an ON_Mesh representation of this limit mesh. Otherwise, nullptr.

ToMesh() [3/3]

ON_Mesh* ON_SubDMesh::ToMesh	(	unsigned int	mesh_density,
		ON_Mesh *	destination_mesh
	)		const

Description: Parameters: mesh_density - [in] Larger numbers return denser meshes. destination_mesh - [in] If destination_mesh is not nullptr, then the returned mesh will be store here. Otherwise the returned mesh will be allocated with a call to new ON_Mesh(). Returns: If this limit mesh is not empty, an ON_Mesh representation of this limit mesh. Otherwise, nullptr.

Transform()

bool ON_SubDMesh::Transform

(

const ON_Xform &

xform

)

Update()

bool ON_SubDMesh::Update

(

bool

bShareUpdate

)

Description: If the subd referenced by m_subd_ref changes, then call Update to update the limit mesh.

Friends And Related Function Documentation

ON_SubDMeshImpl

friend class ON_SubDMeshImpl

friend

Member Data Documentation

Empty

const ON_SubDMesh ON_SubDMesh::Empty

static