Parameters for the mesh generator.
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#include <MeshGenParams.h>
This class serves as container for mesh generator parameters. Client code can provide a class which derives from MeshGenParams and which provides custom implementations of the getMaxTriangleArea(Triangle* pT) method or the getMaxEdgeLength(Triangle* pT) method in order to gain control over the local density of the generated mesh. When the meshing algorithm decides if a certain triangle T must be refined, then it calls these functions.
 See also
 http://www.geom.at/advancedmeshgeneration/
◆ getMaxEdgeLength()
virtual double GEOM_FADE25D::MeshGenParams::getMaxEdgeLength 
( 
Triangle2 * 
pT  ) 


inlinevirtual 
 Parameters

pT  is a triangle for which the meshing algorithm checks if it must be refined. 
The default implementation of the present class returns the value maxEdgeLength (which is DBL_MAX if not changed by the user). This method can be overridden by the client software in order to control the local mesh density.
User Controlled Mesh Density, Edge Length
◆ getMaxTriangleArea()
virtual double GEOM_FADE25D::MeshGenParams::getMaxTriangleArea 
( 
Triangle2 * 
pT  ) 


inlinevirtual 
 Parameters

pT  is a triangle for which the meshing algorithm checks if it must be refined. 
The default implementation of the present class returns the value maxTriangleArea (which is the default value DBL_MAX if not changed by the user). This method can be overridden by the client software in order to control the local mesh density.
User Controlled Mesh Density, Area
◆ bAllowConstraintSplitting
bool GEOM_FADE25D::MeshGenParams::bAllowConstraintSplitting 
Defines if constraint segments can be splitted. Default: yes
◆ bKeepExistingSteinerPoints
bool GEOM_FADE25D::MeshGenParams::bKeepExistingSteinerPoints 
A previous call to refine() or refineAdvanced() may have created Steiner points. These may be partially or entirely removed during a later refinement call, even (!) if this later refinement takes place in a different zone. It depends on your application if this behavior is desired or not. Usually you want to preserve the points, thus the default value of /p bKeepExistingSteinerPoints is true.
◆ capAspectLimit
double GEOM_FADE25D::MeshGenParams::capAspectLimit 
Limits the quotient edgeLength / height. Default value: 10.0
◆ command
int GEOM_FADE25D::MeshGenParams::command 
A command for development, not for public use. Will vanish soon.
◆ gridLength
double GEOM_FADE25D::MeshGenParams::gridLength 
Set gridLength > 0 to mesh large enough areas with grid points. Border areas and narrow stripes where a grid does not fit are automatically meshed using classic Delaunay methods. By default gridLength=0 (off).
 Note
 The length of the diagonals in the grid is sqrt(2)*gridLength and the algorithm may automatically adapt the gridLength a bit such that the grid fits better into the shape.
Grid Meshing axis aligned
◆ gridVector
Vector2 GEOM_FADE25D::MeshGenParams::gridVector 
When gridmeshing is used the grid is aligned to the gridVector
. By default gridVector
is axis aligned.
Grid Meshing along Vector2(1.0,0.3,0.0)
◆ growFactor
double GEOM_FADE25D::MeshGenParams::growFactor 
Limits the growth of adjacent triangles. The mesh is constructed such that for any two adjacent triangles t0 and t1 (where t0 is the larger one) area(t0)/area(t1) < growFactor. Recommendation: growFactor>5.0, Default: growFactor=DBL_MAX
◆ growFactorMinArea
double GEOM_FADE25D::MeshGenParams::growFactorMinArea 
The growFactor value is ignored for triangles with a smaller area than growFactorMinArea. This value prevents generation of hundreds of tiny triangles around one that is unusually small. Default: 0.001
◆ maxEdgeLength
double GEOM_FADE25D::MeshGenParams::maxEdgeLength 
This value is returned by the default implementation of getMaxEdgeLength(Triangle* pT). Larger edges are automatically subdivided. If a custom implementation of getMaxEdgeLength(Triangle* pT) is provided then this value is ignored. Default value: DBL_MAX.
◆ maxHeightError
double GEOM_FADE25D::MeshGenParams::maxHeightError 
If pHeightGuideTriangulation is set and the height error exceeds locally maxHeightError then the triangulation is further refined.
◆ maxTriangleArea
double GEOM_FADE25D::MeshGenParams::maxTriangleArea 
This value is returned by the default implementation of getMaxTriangleArea(Triangle* pT). Larger triangles are automatically subdivided. If a custom implementation of getMaxTriangleArea(Triangle* pT) is provided then this value is ignored. Default value: DBL_MAX.
◆ minAngleDegree
double GEOM_FADE25D::MeshGenParams::minAngleDegree 
Minimum interior angle: Default: 20.0, maximum: 30.0
◆ minEdgeLength
double GEOM_FADE25D::MeshGenParams::minEdgeLength 
Edges below the minimum length are not subdivided. This parameter is useful to avoid tiny triangles. Default: 0.001
◆ pHeightGuideTriangulation
Fade_2D* GEOM_FADE25D::MeshGenParams::pHeightGuideTriangulation 
When new vertices are created then their height (zcoordinate) is usually computed from the existing triangles. In a situation where an extra triangulation with more accurate heights exists this extra triangulation cn be set als height guide triangulation. In this case the zcoordinates are computed from the triangles of the height guide triangulation.
The documentation for this class was generated from the following file: