ON_MeshXPoint Class Reference

#include <opennurbs_mesh.h>

Public Member Functions
	ON_MeshXPoint ()
	this class must not have a vtable. More...
int	IsFacetCorner () const

Static Public Member Functions
static int	Compare2dLocation (const ON_MeshXPoint *p, const ON_MeshXPoint *q)
static int	Compare3dLocation (const ON_MeshXPoint *p, const ON_MeshXPoint *q)
static int	Compare3dLocationAndId (const ON_MeshXPoint *p, const ON_MeshXPoint *q)
static int	CompareLocationsAndId (const ON_MeshXPoint *p, const ON_MeshXPoint *q)
static int	CompareNextPrev (const ON_MeshXPoint *p, const ON_MeshXPoint *q)
static int	IsFacetEdge (const ON_MeshXPoint *p, const ON_MeshXPoint *q)

Public Attributes
double	m_bc [4]
ON__UINT32	m_event_sn
	m_event_sn must immediately follow m_point. More...
unsigned int	m_mesh_facet_index
ON__UINT_PTR	m_mesh_id
unsigned int	m_mesh_vertex_index
ON__UINT_PTR	m_other_id
double	m_other_parameter
class ON_MeshXPoint *	m_p [2]
	(previous,next) More...
ON_3dPoint	m_point
	m_point must be the first data member in this class. More...
ON__UINT16	m_point_status
ON_2dPoint	m_S
ON__INT_PTR	m_tag

Static Public Attributes
static const ON__UINT16	m_status_at_corner
	= 0x0010 More...
static const ON__UINT16	m_status_corner_mask
	= 0x001F More...
static const ON__UINT16	m_status_corner_value [4]
	= {0x0001,0x0002,0x0004,0x0008} More...
static const ON__UINT16	m_status_corner_value_mask
	= 0x000F More...
static const ON__UINT16	m_status_degenerate
	= 0x0100 More...
static const ON__UINT16	m_status_olap_edge_end
	= 0x0040 More...
static const ON__UINT16	m_status_olap_edge_mask
	= 0x0060 More...
static const ON__UINT16	m_status_olap_edge_start
	= 0x0020 More...
static const ON__UINT16	m_status_olap_facet_corner
	= 0x0080 More...

Friends
class	ON_MeshXPointPool

Constructor & Destructor Documentation

ON_MeshXPoint()

ON_MeshXPoint::ON_MeshXPoint

(

)

this class must not have a vtable.

Member Function Documentation

Compare2dLocation()

static int ON_MeshXPoint::Compare2dLocation ( const ON_MeshXPoint *  p, const ON_MeshXPoint *  q  )

static

Description: Dictionary compares the coordinates of m_S.

Compare3dLocation()

static int ON_MeshXPoint::Compare3dLocation ( const ON_MeshXPoint *  p, const ON_MeshXPoint *  q  )

static

Description: Dictionary compares the coordinates of m_point.

Compare3dLocationAndId()

static int ON_MeshXPoint::Compare3dLocationAndId ( const ON_MeshXPoint *  p, const ON_MeshXPoint *  q  )

static

Description: Dictionary the coordinates of m_point, then m_mesh_id.

CompareLocationsAndId()

static int ON_MeshXPoint::CompareLocationsAndId ( const ON_MeshXPoint *  p, const ON_MeshXPoint *  q  )

static

Description: Dictionary the coordinates of m_point, then m_mesh_id, then the coordinates of m_S.

CompareNextPrev()

static int ON_MeshXPoint::CompareNextPrev ( const ON_MeshXPoint *  p, const ON_MeshXPoint *  q  )

static

Description: Compares the next and previous pointers in m_p[]. (null,null) < (not null,null) < (null,not null) < (not null,not null)

IsFacetCorner()

int ON_MeshXPoint::IsFacetCorner

(

)

const

Returns: 0: not a facet corner 1: face.vi[0] corner 2: face.vi[1] corner 4: face.vi[2] corner 8: face.vi[3] corner

IsFacetEdge()

static int ON_MeshXPoint::IsFacetEdge ( const ON_MeshXPoint *  p, const ON_MeshXPoint *  q  )

static

Parameters: p - [in] edge starting point q - [in] edge ending point
Returns: 0: (p,q) are not the ends of a mesh facet edge +3: (p,q) is the edge from face.vi[0] to face.vi[1]. -3: (p,q) is the edge from face.vi[1] to face.vi[0]. +5: (p,q) is the edge from face.vi[2] to face.vi[0]. -5: (p,q) is the edge from face.vi[0] to face.vi[2]. +9: (p,q) is the edge from face.vi[3] to face.vi[0]. -9: (p,q) is the edge from face.vi[0] to face.vi[3]. +6: (p,q) is the edge from face.vi[1] to face.vi[2]. -6: (p,q) is the edge from face.vi[2] to face.vi[1]. +10: (p,q) is the edge from face.vi[3] to face.vi[1]. -10: (p,q) is the edge from face.vi[1] to face.vi[3]. +12: (p,q) is the edge from face.vi[2] to face.vi[3]. -12: (p,q) is the edge from face.vi[3] to face.vi[2].

Friends And Related Function Documentation

ON_MeshXPointPool

friend class ON_MeshXPointPool

friend

Member Data Documentation

m_bc

double ON_MeshXPoint::m_bc[4]

The values of m_bc[] are the mesh facet's barycentric coordinates for the point.

m_event_sn

ON__UINT32 ON_MeshXPoint::m_event_sn

m_event_sn must immediately follow m_point.

m_mesh_facet_index

unsigned int ON_MeshXPoint::m_mesh_facet_index

m_mesh_id

ON__UINT_PTR ON_MeshXPoint::m_mesh_id

m_mesh_vertex_index

unsigned int ON_MeshXPoint::m_mesh_vertex_index

If (0x0F & m_status_bits) = 1, 2, 4 or 8, then m_mesh_vertex_index = index of the mesh's vertex.

m_other_id

ON__UINT_PTR ON_MeshXPoint::m_other_id

m_other_parameter

double ON_MeshXPoint::m_other_parameter

The interpretation of m_other_id depends on what created the ON_MeshXPoint. ON_MeshXPlane::IntersectLine(): m_other_id = line_id ON_MeshXPlane::IntersectPlane(): m_other_id = plane_id

m_p

class ON_MeshXPoint* ON_MeshXPoint::m_p[2]

(previous,next)

The m_p[] pointers are used as previous and next pointers when connecting events in an intersection component. See ON_MeshXPoint::JoinPoints() for more details.

m_point

ON_3dPoint ON_MeshXPoint::m_point

m_point must be the first data member in this class.

m_point_status

ON__UINT16 ON_MeshXPoint::m_point_status

The bits of (m_status_corner_mask & m_point_status) are set to identify the corner or edge of the facet the mesh-plane intersection point lies on. Below "Cn" identifies a corner of the facet: Cn = mesh.m_V[face.vi[n]], n = 0, 1, 2 or 3.

(1 & m_point_status): set if C0 is an end point (2 & m_point_status): set if C1 is an end point (4 & m_point_status): set if C2 is an end point (8 & m_point_status): set if C3 is an end point (1 | 2): point is interior to the facet edge connecting C0 and C1 (2 | 4): point is interior to the facet edge connecting C1 and C2 (4 | 8): point is interior to the quad edge connecting C2 and C3 (1 | 8): point is interior to the quad edge connecting C3 and C0 (1 | 4): point is interior to the triangle edge connecting C0 and C2

(0x10 & m_point_status): set if the point is a corner point (not interior).

The bits of (m_status_olap_mask & m_point_status) reports overlap conditions.

(m_status_olap_facet & m_point_status): set if the point is the corner of a facet that is in the plane. (m_status_edge_01 & m_point_status): set if the facet edge connecting C0 and C1 is in the plane and the point is at the start or end of this facet edge. (m_status_edge_12 & m_point_status): set if the facet edge connecting C1 and C2 is in the plane and the point is at the start or end of this facet edge. (m_status_edge_23 & m_point_status): set if the quad facet edge connecting C2 and C3 is in the plane and the point is at the start or end of this edge. (m_status_edge_30 & m_point_status): set if the quad facet edge connecting C3 and C0 is in the plane and the point is at the start or end of this edge. (m_status_edge_20 & m_point_status): set if the triangle facet edge connecting C2 and C0 is in the plane and the point is at the start or end of this edge.

m_S

ON_2dPoint ON_MeshXPoint::m_S

Surface parameters If no surface parameters are on the mesh, m_S = (0.0,0.0).

m_status_at_corner

const ON__UINT16 ON_MeshXPoint::m_status_at_corner

static

= 0x0010

m_status_corner_mask

const ON__UINT16 ON_MeshXPoint::m_status_corner_mask

static

= 0x001F

m_status_corner_value

const ON__UINT16 ON_MeshXPoint::m_status_corner_value[4]

static

= {0x0001,0x0002,0x0004,0x0008}

m_status_corner_value_mask

const ON__UINT16 ON_MeshXPoint::m_status_corner_value_mask

static

= 0x000F

m_status_degenerate

const ON__UINT16 ON_MeshXPoint::m_status_degenerate

static

= 0x0100

m_status_olap_edge_end

const ON__UINT16 ON_MeshXPoint::m_status_olap_edge_end

static

= 0x0040

m_status_olap_edge_mask

const ON__UINT16 ON_MeshXPoint::m_status_olap_edge_mask

static

= 0x0060

m_status_olap_edge_start

const ON__UINT16 ON_MeshXPoint::m_status_olap_edge_start

static

= 0x0020

m_status_olap_facet_corner

const ON__UINT16 ON_MeshXPoint::m_status_olap_facet_corner

static

= 0x0080

m_tag

ON__INT_PTR ON_MeshXPoint::m_tag

The "m_tag" field is set to zero when an ON_MeshXPoint is created and when it is destroyed. It is copied when an ON_MeshXPoint class is copied. Nothing else in opennurbs modifies or uses this value.