ON_SubDFaceNeighborhood Class Reference

#include <opennurbs_subd_data.h>

Public Member Functions
	ON_SubDFaceNeighborhood ()=default
	~ON_SubDFaceNeighborhood ()
bool	Subdivide (const ON_SubDFace *face)

Public Attributes
const ON_SubDVertex *	m_center_vertex1 = nullptr
const ON_SubDFace *	m_face0 = nullptr
	initial face More...
const class ON_SubDFace **	m_face1 = nullptr
unsigned int	m_face1_count = 0
unsigned char	m_reserved1 = 0

Detailed Description

ON_SubDFaceNeighborhood

Constructor & Destructor Documentation

ON_SubDFaceNeighborhood()

ON_SubDFaceNeighborhood::ON_SubDFaceNeighborhood ( )

default

~ON_SubDFaceNeighborhood()

ON_SubDFaceNeighborhood::~ON_SubDFaceNeighborhood

(

)

Member Function Documentation

Subdivide()

bool ON_SubDFaceNeighborhood::Subdivide

(

const ON_SubDFace *

face

)

Description: Apply a single iteration of the subdivision algorithm to face and save the results in this ON_SubDFaceNeighborhood. If a vertex of the initial face is extraordinary, the limit point and normal are calculated from face and saved on the subdivision.

The resulting section of a subdivision surface is suitable for limit surface and limit mesh evaluation of the original face. The ON_SubDFaceNeighborhood is designed to be used to calculate the limit surface and limit mesh for faces that have an extraordinary number of edges.

Member Data Documentation

m_center_vertex1

const ON_SubDVertex* ON_SubDFaceNeighborhood::m_center_vertex1 = nullptr

The center vertex will be a smooth vertex with valence = m_face0->m_edge_count. The edges and faces are sorted radially and all faces are quads.

In all other cases, m_center_vertex is null.

m_face0

const ON_SubDFace* ON_SubDFaceNeighborhood::m_face0 = nullptr

initial face

m_face1

const class ON_SubDFace** ON_SubDFaceNeighborhood::m_face1 = nullptr

m_face1_count

unsigned int ON_SubDFaceNeighborhood::m_face1_count = 0

m_face1[] is a list of the subdivision faces that subdivide the original face.
m_face1 is identical to m_center_vertex1->m_faces[]. The m_next_face pointers are set so that m_face1[i]->m_next_face = m_face1[i+1]. Note that m_face1[m_face1_count-1]->m_next_face may not be null.

m_reserved1

unsigned char ON_SubDFaceNeighborhood::m_reserved1 = 0