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Flags. MEL
examples.
polySplitVertex [-caching boolean] [-constructionHistory boolean]
[-name string] [-nodeState int] [-worldSpace boolean]
polySplitVertex is undoable, queryable, and editable.
Use this command to split one or more vertices.A mesh is made up of
one or more faces. The faces are defined by edges which connect
vertices together. Typically a face will share vertices and edges
with adjacent faces in the same mesh. Sharing vertices and edges
helps reduce the amount of memory used by a mesh. It also ensures
that when a face is moved, all the connected faces move
together.
Sometimes you may want to separate a face from its connected faces
so that it may be moved in isolation. There are three ways to
accomplish this depending upon which parts of the face you want to
extract:
| polySplitVertex |
split one or more vertices so that each face that shared the
vertex acquires its own copy of the vertex |
| polySplitEdge |
split one or more edges so that each face that shared the
vertex acquires its own copy of the edge |
| polyChipOff |
completely extract the face so that it has its own vertices and
edges |
Notice that the area of affect of each operation is different.
polySplitVertex will affect all the edges and faces that shared the
vertex. This is the broadest effect. polySplitEdge will only affect
the faces which shared the edge and polyChipOff will affect a
specific face. If we just count vertices to measure the effect of
each command when splitting all components of a face, starting from
a 3x3 plane which has 16 vertices and we were to split the middle
face:
| polySplitVertex applied to the four vertices would end up
creating 12 new vertices |
| polySplitEdge applied to the four edges would end up creating 4
new vertices |
| polyChipOff applied to the middle face would end up creating 4
new vertices |
Note that polySplitVertex may create non-manifold geometry as a
part of this operation. You can use Polygons->Cleanup afterwards
to to clean up any non-manifold geometry.
| string |
The polySplitVert node name. |
In query mode, return type is based on queried flag.
polyAppend, polyAppendVertex, polyBevel, polyChipOff, polyCreateFacet, polyExtrudeEdge, polyExtrudeFacet, polySmooth, polySplit, polySubdivideEdge, polySubdivideFacet, polyTriangulate
caching, constructionHistory, name, nodeState,
worldSpace
| Long name (short name) |
Argument types |
Properties |
-worldSpace(-ws) |
boolean |
|
|
|
| Common flags |
-name(-n) |
string |
 |
|
Give a name to the resulting node. |
|
-constructionHistory(-ch) |
boolean |
 |
|
Turn the construction history on or off (where applicable). If
construction history is on then the corresponding node will be
inserted into the history chain for the mesh. If construction
history is off then the operation will be performed directly on the
object.
Note: If the object already has construction history then
this flag is ignored and the node will always be inserted into the
history chain. |
|
-caching(-cch) |
boolean |
 |
|
Toggle caching for all attributes so that no recomputation is
needed |
|
-nodeState(-nds) |
int |
|
|
Defines how to evaluate the node.
- 0: Normal
- 1: PassThrough
- 2: Blocking
- 3: Internally disabled. Will return to Normal state when
enabled
- 4: Internally disabled. Will return to PassThrough state when
enabled
- 5: Internally disabled. Will return to Blocking state when
enabled
|
|
| Flag can appear in Create mode of
command |
Flag can appear in Edit mode of command |
| Flag can appear in Query mode of command |
 Flag can be used more than once in a
command. |
// Objective: split the four middle vertices of a 3x3 plane so
// that the middle face can be moved seperately
// Create a 3x3 plane
//
polyPlane -sx 3 -sy 3 -name polyPlane;
// Result: polyPlane polyPlane1
// Count the number of vertices we start out with
//
polyEvaluate -vertex polyPlane;
// Result: 16
// Split the four middle vertices
//
polySplitVertex polyPlane.vtx[5] polyPlane.vtx[6] polyPlane.vtx[9] polyPlane.vtx[10];
// Result: polySplitVert1
// Count the number of vertices we have now
//
polyEvaluate -vertex polyPlane;
// Result: 28
// Note that because we split the 4 middle vertices, the 8
// surrounding faces have become non-manifold