Lookup tables for marching cells contouring. More...

#include <vtkMarchingCellsContourCases.h>

Public Types
using	CellCase = const int*
	Generic interface to retrieve a contour case entry for any supported cell type.

using	Edge = int[2]
	Returns the edge definitions for the given cell type as an array of (point index pairs), where each pair defines one edge of the cell.

using	EdgeArray = const Edge*

Static Public Member Functions
static CellCase	GetCellCase (int cellType, uint8_t caseIndex)

static EdgeArray	GetCellEdges (int cellType)

using	LineCase = int[2]
	Case tables for a line cell (VTK_LINE).

static const LineCase *	GetLineCases ()
	Case tables for a line cell (VTK_LINE).

static const LineCase &	GetLineCase (uint8_t caseIndex)
	Case tables for a line cell (VTK_LINE).

using	TriangleCase = int[3]
	Case tables for a triangle cell (VTK_TRIANGLE).

static const TriangleCase *	GetTriangleCases ()
	Case tables for a triangle cell (VTK_TRIANGLE).

static const TriangleCase &	GetTriangleCase (uint8_t caseIndex)
	Case tables for a triangle cell (VTK_TRIANGLE).

using	PixelCase = int[5]
	Case tables for a pixel cell (VTK_PIXEL).

static const PixelCase *	GetPixelCases ()
	Case tables for a pixel cell (VTK_PIXEL).

static const PixelCase &	GetPixelCase (uint8_t caseIndex)
	Case tables for a pixel cell (VTK_PIXEL).

using	QuadCase = int[5]
	Case tables for a quad cell (VTK_QUAD).

static const QuadCase *	GetQuadCases ()
	Case tables for a quad cell (VTK_QUAD).

static const QuadCase &	GetQuadCase (uint8_t caseIndex)
	Case tables for a quad cell (VTK_QUAD).

using	TetraCase = int[7]
	Case tables for a tetrahedron cell (VTK_TETRA).

static const TetraCase *	GetTetraCases ()
	Case tables for a tetrahedron cell (VTK_TETRA).

static const TetraCase &	GetTetraCase (uint8_t caseIndex)
	Case tables for a tetrahedron cell (VTK_TETRA).

using	VoxelCase = int[16]
	Case tables for a voxel cell (VTK_VOXEL).

static const VoxelCase *	GetVoxelCases ()
	Case tables for a voxel cell (VTK_VOXEL).

static const VoxelCase &	GetVoxelCase (uint8_t caseIndex)
	Case tables for a voxel cell (VTK_VOXEL).

using	HexahedronCase = int[16]
	Case tables for a hexahedron cell (VTK_HEXAHEDRON).

static const HexahedronCase *	GetHexahedronCases ()
	Case tables for a hexahedron cell (VTK_HEXAHEDRON).

static const HexahedronCase &	GetHexahedronCase (uint8_t caseIndex)
	Case tables for a hexahedron cell (VTK_HEXAHEDRON).

using	HexahedronWithPolygonCase = int[17]
	Case tables for a hexahedron cell with polygon output (VTK_HEXAHEDRON).

static const HexahedronWithPolygonCase *	GetHexahedronWithPolygonCases ()
	Case tables for a hexahedron cell with polygon output (VTK_HEXAHEDRON).

static const HexahedronWithPolygonCase &	GetHexahedronWithPolygonCase (uint8_t caseIndex)
	Case tables for a hexahedron cell with polygon output (VTK_HEXAHEDRON).

using	WedgeCase = int[13]
	Case tables for a wedge cell (VTK_WEDGE).

static const WedgeCase *	GetWedgeCases ()
	Case tables for a wedge cell (VTK_WEDGE).

static const WedgeCase &	GetWedgeCase (uint8_t caseIndex)
	Case tables for a wedge cell (VTK_WEDGE).

using	PyramidCase = int[13]
	Case tables for a pyramid cell (VTK_PYRAMID).

static const PyramidCase *	GetPyramidCases ()
	Case tables for a pyramid cell (VTK_PYRAMID).

static const PyramidCase &	GetPyramidCase (uint8_t caseIndex)
	Case tables for a pyramid cell (VTK_PYRAMID).

Detailed Description

Lookup tables for marching cells contouring.

vtkMarchingCellsContourCases provides the edge intersection tables used by marching cells algorithms to generate contours (isosurfaces/isolines) for each supported cell type.

For each cell type, a case index is computed by treating each vertex as a bit in a bitmask: bit i is set if vertex i's scalar value is greater than or equal to the contour value. This case index is then used to look up a list of edges that the contour surface intersects.

Each case entry is an array of edge indices terminated by -1. For surface cells (3D), edges are grouped into triangles (3 edges per triangle). For line cells (2D), edges are grouped into line segments (2 edges per segment). Edge indices refer to the cell type's own edge numbering convention, as returned by GetCellEdges().

The number of cases per cell type is 2^N where N is the number of vertices:

Line: 2^2 = 4 cases
Triangle: 2^3 = 8 cases
Pixel/Quad: 2^4 = 16 cases
Tetra: 2^4 = 16 cases
Voxel/Hex: 2^8 = 256 cases
Wedge: 2^6 = 64 cases
Pyramid: 2^5 = 32 cases

See also: vtkMarchingCellsClipCases

Definition at line 42 of file vtkMarchingCellsContourCases.h.

Member Typedef Documentation

◆ LineCase

using vtkMarchingCellsContourCases::LineCase = int[2]

Case tables for a line cell (VTK_LINE).

Each case entry is an array of 2 ints: one edge index followed by -1. There are 4 cases (2^2 vertices).

Definition at line 51 of file vtkMarchingCellsContourCases.h.

◆ TriangleCase

using vtkMarchingCellsContourCases::TriangleCase = int[3]

Case tables for a triangle cell (VTK_TRIANGLE).

Each case entry is an array of 3 ints: edge indices grouped into line segments, terminated by -1. There are 8 cases (2^3 vertices).

Definition at line 62 of file vtkMarchingCellsContourCases.h.

◆ PixelCase

using vtkMarchingCellsContourCases::PixelCase = int[5]

Case tables for a pixel cell (VTK_PIXEL).

Each case entry is an array of 5 ints: edge indices grouped into line segments, terminated by -1. There are 16 cases (2^4 vertices). Note: vtkPixel uses a different point ordering than vtkQuad (points 2 and 3 are swapped), so this table differs from QuadCases.

Definition at line 75 of file vtkMarchingCellsContourCases.h.

◆ QuadCase

using vtkMarchingCellsContourCases::QuadCase = int[5]

Case tables for a quad cell (VTK_QUAD).

Each case entry is an array of 5 ints: edge indices grouped into line segments, terminated by -1. There are 16 cases (2^4 vertices).

Definition at line 86 of file vtkMarchingCellsContourCases.h.

◆ TetraCase

using vtkMarchingCellsContourCases::TetraCase = int[7]

Case tables for a tetrahedron cell (VTK_TETRA).

Each case entry is an array of 7 ints: edge indices grouped into triangles (3 edges per triangle), terminated by -1. There are 16 cases (2^4 vertices).

Definition at line 97 of file vtkMarchingCellsContourCases.h.

◆ VoxelCase

using vtkMarchingCellsContourCases::VoxelCase = int[16]

Case tables for a voxel cell (VTK_VOXEL).

Each case entry is an array of 16 ints: edge indices grouped into triangles (3 edges per triangle), terminated by -1. There are 256 cases (2^8 vertices). Note: vtkVoxel uses a different point ordering than vtkHexahedron (points 2 and 3 are swapped, as are points 6 and 7), so this table differs from HexahedronCases.

Definition at line 111 of file vtkMarchingCellsContourCases.h.

◆ HexahedronCase

using vtkMarchingCellsContourCases::HexahedronCase = int[16]

Case tables for a hexahedron cell (VTK_HEXAHEDRON).

Each case entry is an array of 16 ints: edge indices grouped into triangles (3 edges per triangle), terminated by -1. There are 256 cases (2^8 vertices).

Definition at line 122 of file vtkMarchingCellsContourCases.h.

◆ HexahedronWithPolygonCase

using vtkMarchingCellsContourCases::HexahedronWithPolygonCase = int[17]

Case tables for a hexahedron cell with polygon output (VTK_HEXAHEDRON).

Each case entry is an array of 17 ints: edge indices grouped into polygons, terminated by -1. There are 256 cases (2^8 vertices).

Definition at line 133 of file vtkMarchingCellsContourCases.h.

◆ WedgeCase

using vtkMarchingCellsContourCases::WedgeCase = int[13]

Case tables for a wedge cell (VTK_WEDGE).

Each case entry is an array of 13 ints: edge indices grouped into triangles (3 edges per triangle), terminated by -1. There are 64 cases (2^6 vertices).

Definition at line 144 of file vtkMarchingCellsContourCases.h.

◆ PyramidCase

using vtkMarchingCellsContourCases::PyramidCase = int[13]

Case tables for a pyramid cell (VTK_PYRAMID).

Each case entry is an array of 13 ints: edge indices grouped into triangles (3 edges per triangle), terminated by -1. There are 32 cases (2^5 vertices).

Definition at line 155 of file vtkMarchingCellsContourCases.h.

◆ CellCase

using vtkMarchingCellsContourCases::CellCase = const int*

Generic interface to retrieve a contour case entry for any supported cell type.

Parameters

cellType	A VTK cell type constant (e.g. VTK_HEXAHEDRON, VTK_WEDGE).
caseIndex	The case index computed from the vertex inside/outside bitmask.

Returns: A pointer to the first edge index in the case entry, terminated by -1, or a pointer to -1 if the cell type is not supported.

Definition at line 167 of file vtkMarchingCellsContourCases.h.

◆ Edge

using vtkMarchingCellsContourCases::Edge = int[2]

Returns the edge definitions for the given cell type as an array of (point index pairs), where each pair defines one edge of the cell.

The array is terminated by a { -1, -1 } sentinel. Returns nullptr if the cell type is not supported.

Definition at line 176 of file vtkMarchingCellsContourCases.h.

◆ EdgeArray

using vtkMarchingCellsContourCases::EdgeArray = const Edge*

Definition at line 177 of file vtkMarchingCellsContourCases.h.

Member Function Documentation

◆ GetLineCases()

static const LineCase * vtkMarchingCellsContourCases::GetLineCases ( )

static

Case tables for a line cell (VTK_LINE).

Each case entry is an array of 2 ints: one edge index followed by -1. There are 4 cases (2^2 vertices).

◆ GetLineCase()

static const LineCase & vtkMarchingCellsContourCases::GetLineCase ( uint8_t caseIndex )

static

Case tables for a line cell (VTK_LINE).

Each case entry is an array of 2 ints: one edge index followed by -1. There are 4 cases (2^2 vertices).

◆ GetTriangleCases()

static const TriangleCase * vtkMarchingCellsContourCases::GetTriangleCases ( )

static

Case tables for a triangle cell (VTK_TRIANGLE).

Each case entry is an array of 3 ints: edge indices grouped into line segments, terminated by -1. There are 8 cases (2^3 vertices).

◆ GetTriangleCase()

static const TriangleCase & vtkMarchingCellsContourCases::GetTriangleCase ( uint8_t caseIndex )

static

Case tables for a triangle cell (VTK_TRIANGLE).

Each case entry is an array of 3 ints: edge indices grouped into line segments, terminated by -1. There are 8 cases (2^3 vertices).

◆ GetPixelCases()

static const PixelCase * vtkMarchingCellsContourCases::GetPixelCases ( )

static

Case tables for a pixel cell (VTK_PIXEL).

Each case entry is an array of 5 ints: edge indices grouped into line segments, terminated by -1. There are 16 cases (2^4 vertices). Note: vtkPixel uses a different point ordering than vtkQuad (points 2 and 3 are swapped), so this table differs from QuadCases.

◆ GetPixelCase()

static const PixelCase & vtkMarchingCellsContourCases::GetPixelCase ( uint8_t caseIndex )

static

Case tables for a pixel cell (VTK_PIXEL).

Each case entry is an array of 5 ints: edge indices grouped into line segments, terminated by -1. There are 16 cases (2^4 vertices). Note: vtkPixel uses a different point ordering than vtkQuad (points 2 and 3 are swapped), so this table differs from QuadCases.

◆ GetQuadCases()

static const QuadCase * vtkMarchingCellsContourCases::GetQuadCases ( )

static

Case tables for a quad cell (VTK_QUAD).

Each case entry is an array of 5 ints: edge indices grouped into line segments, terminated by -1. There are 16 cases (2^4 vertices).

◆ GetQuadCase()

static const QuadCase & vtkMarchingCellsContourCases::GetQuadCase ( uint8_t caseIndex )

static

Case tables for a quad cell (VTK_QUAD).

Each case entry is an array of 5 ints: edge indices grouped into line segments, terminated by -1. There are 16 cases (2^4 vertices).

◆ GetTetraCases()

static const TetraCase * vtkMarchingCellsContourCases::GetTetraCases ( )

static

Case tables for a tetrahedron cell (VTK_TETRA).

Each case entry is an array of 7 ints: edge indices grouped into triangles (3 edges per triangle), terminated by -1. There are 16 cases (2^4 vertices).

◆ GetTetraCase()

static const TetraCase & vtkMarchingCellsContourCases::GetTetraCase ( uint8_t caseIndex )

static

Case tables for a tetrahedron cell (VTK_TETRA).

Each case entry is an array of 7 ints: edge indices grouped into triangles (3 edges per triangle), terminated by -1. There are 16 cases (2^4 vertices).

◆ GetVoxelCases()

static const VoxelCase * vtkMarchingCellsContourCases::GetVoxelCases ( )

static

Case tables for a voxel cell (VTK_VOXEL).

Each case entry is an array of 16 ints: edge indices grouped into triangles (3 edges per triangle), terminated by -1. There are 256 cases (2^8 vertices). Note: vtkVoxel uses a different point ordering than vtkHexahedron (points 2 and 3 are swapped, as are points 6 and 7), so this table differs from HexahedronCases.

◆ GetVoxelCase()

static const VoxelCase & vtkMarchingCellsContourCases::GetVoxelCase ( uint8_t caseIndex )

static

Case tables for a voxel cell (VTK_VOXEL).

Each case entry is an array of 16 ints: edge indices grouped into triangles (3 edges per triangle), terminated by -1. There are 256 cases (2^8 vertices). Note: vtkVoxel uses a different point ordering than vtkHexahedron (points 2 and 3 are swapped, as are points 6 and 7), so this table differs from HexahedronCases.

◆ GetHexahedronCases()

static const HexahedronCase * vtkMarchingCellsContourCases::GetHexahedronCases ( )

static

Case tables for a hexahedron cell (VTK_HEXAHEDRON).

Each case entry is an array of 16 ints: edge indices grouped into triangles (3 edges per triangle), terminated by -1. There are 256 cases (2^8 vertices).

◆ GetHexahedronCase()

static const HexahedronCase & vtkMarchingCellsContourCases::GetHexahedronCase ( uint8_t caseIndex )

static

Case tables for a hexahedron cell (VTK_HEXAHEDRON).

Each case entry is an array of 16 ints: edge indices grouped into triangles (3 edges per triangle), terminated by -1. There are 256 cases (2^8 vertices).

◆ GetHexahedronWithPolygonCases()

static const HexahedronWithPolygonCase * vtkMarchingCellsContourCases::GetHexahedronWithPolygonCases ( )

static

Case tables for a hexahedron cell with polygon output (VTK_HEXAHEDRON).

Each case entry is an array of 17 ints: edge indices grouped into polygons, terminated by -1. There are 256 cases (2^8 vertices).

◆ GetHexahedronWithPolygonCase()

static const HexahedronWithPolygonCase & vtkMarchingCellsContourCases::GetHexahedronWithPolygonCase ( uint8_t caseIndex )

static

Case tables for a hexahedron cell with polygon output (VTK_HEXAHEDRON).

Each case entry is an array of 17 ints: edge indices grouped into polygons, terminated by -1. There are 256 cases (2^8 vertices).

◆ GetWedgeCases()

static const WedgeCase * vtkMarchingCellsContourCases::GetWedgeCases ( )

static

Case tables for a wedge cell (VTK_WEDGE).

Each case entry is an array of 13 ints: edge indices grouped into triangles (3 edges per triangle), terminated by -1. There are 64 cases (2^6 vertices).

◆ GetWedgeCase()

static const WedgeCase & vtkMarchingCellsContourCases::GetWedgeCase ( uint8_t caseIndex )

static

Case tables for a wedge cell (VTK_WEDGE).

Each case entry is an array of 13 ints: edge indices grouped into triangles (3 edges per triangle), terminated by -1. There are 64 cases (2^6 vertices).

◆ GetPyramidCases()

static const PyramidCase * vtkMarchingCellsContourCases::GetPyramidCases ( )

static

Case tables for a pyramid cell (VTK_PYRAMID).

Each case entry is an array of 13 ints: edge indices grouped into triangles (3 edges per triangle), terminated by -1. There are 32 cases (2^5 vertices).

◆ GetPyramidCase()

static const PyramidCase & vtkMarchingCellsContourCases::GetPyramidCase ( uint8_t caseIndex )

static

Case tables for a pyramid cell (VTK_PYRAMID).

Each case entry is an array of 13 ints: edge indices grouped into triangles (3 edges per triangle), terminated by -1. There are 32 cases (2^5 vertices).

◆ GetCellCase()

static CellCase vtkMarchingCellsContourCases::GetCellCase	(	int	cellType,
		uint8_t	caseIndex )

static

◆ GetCellEdges()

static EdgeArray vtkMarchingCellsContourCases::GetCellEdges ( int cellType )

static

The documentation for this class was generated from the following file:

Common/DataModel/vtkMarchingCellsContourCases.h

Public Types

Static Public Member Functions

Detailed Description

Member Typedef Documentation

◆ LineCase

◆ TriangleCase

◆ PixelCase

◆ QuadCase

◆ TetraCase

◆ VoxelCase

◆ HexahedronCase

◆ HexahedronWithPolygonCase

◆ WedgeCase

◆ PyramidCase

◆ CellCase

◆ Edge

◆ EdgeArray

Member Function Documentation

◆ GetLineCases()

◆ GetLineCase()

◆ GetTriangleCases()

◆ GetTriangleCase()

◆ GetPixelCases()

◆ GetPixelCase()

◆ GetQuadCases()

◆ GetQuadCase()

◆ GetTetraCases()

◆ GetTetraCase()

◆ GetVoxelCases()

◆ GetVoxelCase()

◆ GetHexahedronCases()

◆ GetHexahedronCase()

◆ GetHexahedronWithPolygonCases()

◆ GetHexahedronWithPolygonCase()

◆ GetWedgeCases()

◆ GetWedgeCase()

◆ GetPyramidCases()

◆ GetPyramidCase()

◆ GetCellCase()

◆ GetCellEdges()