Tet, Tet2

Synopsis

Set subobject values for tetrahedral Cell_Sets.

group Space3 { /* 3-space grid */
int nspace = 3;
};

group Space2 { /* 2-space grid */
int nspace = 2;
};

group Space1 { /* 1-space grid */
int nspace = 1;
};

Description

These cell types set values that define the members of this Cells Cell_Set as Tet cells, either with or without mid-edge nodes (cell_order = 2).

Modules that manipulate unstructured grids need the information defined here to correctly process this cell type.

Subobjects

cell_nnodes = 4
cell_nnodes = 10

How many nodes make up the cell. Cells with mid-edge nodes have more nodes.

cell_corner_nnodes=;

In cells with mid-edge nodes, a value that specifies how many of the nodes in the cell are corner nodes.

cell_ndim = 3

How many spatial dimensions make up the cell.

cell_order = 1 or 2

cell_order = 1 means the cell has corner nodes only. cell_order = 2 means the cell has mid-edge nodes.

There is no FLD routine to retrieve this value.

poly_flag = 0

A flag that, when not 0, signals the renderer that this is an unstructured mesh representing a geometry (Polyline, Polytri). The renderer can use faster algorithms to render the object.

There is no FLD routine to retrieve this value.

cell_type = 6 or 16

An integer that uniquely identifies the type of cells in this cell_set. This is one means of discovering this; cell_name is another.

cell_name = "Tet" or "Tet2"

A string that uniquely identifies the type of cells in this cell_set.

node_uvw[4][3] or [10][3]=

A float array that defines the uvws for the nodes. The uvws are necessary when you are interpolating within a cell by calculating derivatives. The coordinates are parametric.

cell_nfaces = 4;

An integer that defines how many faces are in the cell.

cell_face_nnodes[cell_nfaces]

An integer array that specifies how many nodes there are per cell face.

cell_face_connect[12] or [24]

An integer array that, for each face of the cell, specifies which order the nodes that make up the face should be interpreted in. It is necessary to know this, for example, when calculating normals.

cell_face_corner_nnodes[4]

An integer array that defines, for each face of the cell, how many corner nodes it has.

Examples

none.

Files

v/fld.v.

See Also

none.