About Creating a Custom Mesh (Legacy)

# About Creating a Custom Mesh (Legacy)

Create a custom polygon or polyface mesh by specifying vertices.

Specify individual vertices when you create a mesh using the 3DMESH, PFACE, and 3DFACE
commands.

## Understand Legacy Mesh Construction

The mesh density controls the number of facets in legacy polygonal and polyface meshes.
Density is defined in terms of a matrix of M and N vertices, like a grid consisting of columns and rows. M and N specify the column and row position, respectively, of any given vertex.

A mesh can be open or closed. If the start and end edges of the mesh do not touch,
a mesh is open in a given direction, as shown in the following illustrations.

## Create a Rectangular Mesh

With the 3DMESH command, you can create polygon meshes that are open in both the
M and N directions (like the X and Y axes of an XY plane). In most cases, you can use 3DMESH in conjunction with scripts or AutoLISP
routines when you know the mesh points.

As you create the mesh, you specify the size of the mesh in the M and N directions. The total number of vertices you specify for the mesh is equal to the
M value times the N value.

You can close the meshes with the PEDIT command.

You can use 3DMESH to construct irregular meshes.

### Example:

In the following example of text at the Command prompt, you enter the coordinate values
for each vertex to create the mesh in the illustration.

Command: 3dmesh

Mesh M size: 4

Mesh N size: 3

Vertex (0, 0): 10,1, 3

Vertex (0, 1): 10, 5, 5

Vertex (0, 2): 10,10, 3

Vertex (1, 0): 15,1, 0

Vertex (1, 1): 15, 5, 0

Vertex (1, 2): 15,10, 0

Vertex (2, 0): 20,1, 0

Vertex (2, 1): 20, 5, -1

Vertex (2, 2): 20,10 ,0

Vertex (3, 0): 25,1, 0

Vertex (3, 1): 25, 5, 0

Vertex (3, 2): 25,10, 0

## Create a Polyface Mesh

The PFACE command produces a polyface (polygon) mesh, with each face capable of having
numerous vertices. PFACE is typically used by applications rather than by direct user
input.

Creating a polyface mesh is like creating a rectangular mesh. To create a polyface
mesh, you specify coordinates for its vertices. You then define each face by entering
vertex numbers for all the vertices of that face. As you create the polyface mesh,
you can set specific edges to be invisible, assign them to layers, or give them colors.

To make the edge invisible, enter the vertex number as a negative value. For instance,
to make the edge between vertices 5 and 7 invisible in the following illustration,
you enter the following:

Face 3, vertex 3: -7

In the illustration, face 1 is defined by vertices 1, 5, 6, and 2. Face 2 is defined
by vertices 1, 4, 3, and 2. Face 3 is defined by vertices 1, 4, 7, and 5, and face
4 is defined by vertices 3, 4, 7, and 8.

## Create a Polyface Mesh By Specifying Vertexes

With the 3DFACE command, you can create a 3D polyface mesh by specifying each vertex,
and you can specify whether an edge segment is invisible.

If you select a 3DFACE object during some mesh smoothing operations (such as with
MESHSMOOTHMORE), you are prompted to convert 3DFACE objects to mesh objects.

ecify individual vertices when you create a mesh using the 3DMESH, PFACE, and 3DFACE commands. Understand Legacy Mesh Construction The mesh …mesh objects (MESHSMOOTH). Create custom meshes (legacy). Use 3DMESH to …create 2D and 3D games, apps and experiences. … Procedural Mesh Geometry. The Mesh class gives …Meshes and Terrains of all Game Objects which are marked as Navigation Static, and then processes them to create a …create 2D and 3D games, apps and … The Mesh Collider takes a Mesh Asset and builds its Collider based on that Mesh. It is far …create a mesh object, multiple lines called mesh lines crisscross the …. If you save the object to legacy format or EPS or PDF, the transparency on the …… RealFlow offers three different particle mesh types: Particle … Particle Mesh ( Legacy). … Click on Mesh shelf > Build Mesh to create the mesh.Creating a Profile. To create a high-throughput SSID profile: … By default, this parameter is enabled (legacy stations are allowed). Low-density Parity Check.Legacy); 9.4.2 POS ASCII file format … Gmsh is an automatic 3D finite element mesh generator with build-in pre- ….. To create a new geometry or to modify an existing geometry, select 'Geometry' in the tree.

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