PoMeshCrossSection Class Reference
[Representation]

Representation of cross section of a volume mesh. More...

#include <MeshViz/3Ddata/PoMeshCrossSection.h>

Inheritance diagram for PoMeshCrossSection:

List of all members.

Public Types
enum	CrossSectionMethod {   DEFAULT,   ISOSURFACE,   INTERSECTION }
Public Member Functions
virtual SoType	getTypeId () const
virtual const SoNodekitCatalog *	getNodekitCatalog () const
	PoMeshCrossSection ()
virtual void	rebuild ()
void	setCrossSectionMethod (CrossSectionMethod method=DEFAULT)
Static Public Member Functions
static SoType	getClassTypeId ()
static const SoNodekitCatalog *	getClassNodekitCatalog ()
Public Attributes
SoSFPlane	plane

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Detailed Description

Representation of cross section of a volume mesh.

Class to build a filled representation of a cross-section in a volume mesh.

If the field PoMesh::valuesIndex is not defined (or if coloringType = COLOR_INHERITED), the representation uses only one inherited color. If the field PoMesh::valuesIndex is defined (and if coloringType != COLOR_INHERITED), the representation is colored by using the current data mapping applied to each mesh node value. (see PoMesh for more explanations about the current data-mapping).

The vector data of the mesh for this representation is unused.

When using the ISOSURFACE mode, the cross section can be generated by using either a triangle strip set or an indexed face set depending on the preference variable SoPreference::OIV_3DDATA_USE_TRIANGLE_STRIP_SET

FILE FORMAT/DEFAULT

PoMeshCrossSection {

plane	Z=0 plane
valuesIndex	-1
coloringType	COLOR_INHERITED
vecsIndex	-1
valuesIndexForCellFilter	-1
moduleDataMapping	NULL

}

CATALOG PARTS

PoMeshCrossSection {
Separator alternateRep (from PoBase) {

AppearanceKit appearance (from PoBase)
Specifies the appearance of all the kit. By default lightModel.model=PHONG. material.diffuseColor is set when the kit is rebuilt, if the field coloringType is different from COLOR_INHERITED.
MatrixTransform domainTransform (from PoBase)
Corresponds to the domain transformation.
Group groupCrossSection
Contains a SoQuadMesh shape for ParalCartesianGrid3D and RegularCartesianGrid3D meshes and when the cross section is perpendicular to the X, Y or Z axis,  an indexed   shape otherwise, to draw the cross section of the mesh.
}
}



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Member Enumeration Documentation

enum PoMeshCrossSection::CrossSectionMethod

Specifies the method used to compute intersections.

See also:

setCrossSectionMethod().

Enumerator:

DEFAULT	Depending on the mesh type the cross section is computed either like an isosurface or by doing classic intersection. Classic intersections are done for PbParalCartesianGrid3D and PbRegularCartesianGrid3D. An isosurface is computed for all other mesh types.
ISOSURFACE	The cross section is computed like an isosurface.
INTERSECTION	The cross section is computed by doing classic intersections Be careful, this method doesn't support cell filtering (PoCellFilter).

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Constructor & Destructor Documentation

PoMeshCrossSection::PoMeshCrossSection

(

)

Constructor.

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Member Function Documentation

static const SoNodekitCatalog* PoMeshCrossSection::getClassNodekitCatalog

(

)

[static]

Returns the SoNodekitCatalog for this class.

Reimplemented from PoMesh3D.

static SoType PoMeshCrossSection::getClassTypeId

(

)

[static]

Returns the type identifier for this class.

Reimplemented from PoMesh3D.

virtual const SoNodekitCatalog* PoMeshCrossSection::getNodekitCatalog

(

)

const [virtual]

Returns the SoNodekitCatalog for this instance.

Reimplemented from PoMesh3D.

virtual SoType PoMeshCrossSection::getTypeId

(

)

const [virtual]

Returns the type identifier for this specific instance.

Reimplemented from PoMesh3D.

virtual void PoMeshCrossSection::rebuild

(

)

[virtual]

Forces node-kit rebuilding.

See PoBase.

Reimplemented from PoBase.

void PoMeshCrossSection::setCrossSectionMethod

(

CrossSectionMethod

method = DEFAULT

)

[inline]

Specifies the method used to build this shape.

By default PoMeshCrossSection builds a shape by computing an isosurface on a non regular mesh. The node's data are the distances to the plane. This method is safe but it uses a significant amount of memory for each instance of PoMeshCrossSection.

Calling setCrossSectionMethod(INTERSECTION) forces the use of the classic method. The classic method computes the shapes by intersecting each cell with the plane. However it can be risky as it assumes that each mesh's cell is convex and therefore that the intersection of a plane and a cell's face can produce only one edge. Using the classic method with concave faces may produce unpredictable results or an infinite loop.

The environment variable OIV_3DDATA_CROSS_SECTION_METHOD can also be set to specify the method used to build this shape. It can take the values INTERSECTION or ISOSURFACE. However, calling setCrossSectionMethod overrides this environment variable.

Parameters:

method

DEFAULT by default.

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Member Data Documentation

SoSFPlane PoMeshCrossSection::plane

Position of the cross section.

Z=0 plane by default.

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The documentation for this class was generated from the following file:
• MeshViz/3Ddata/PoMeshCrossSection.h