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Synopsis

nurbsSquare [-caching boolean] [-center linear linear linear] [-centerX linear] [-centerY linear] [-centerZ linear] [-constructionHistory boolean] [-degree int] [-name string] [-nodeState int] [-normal linear linear linear] [-normalX linear] [-normalY linear] [-normalZ linear] [-object boolean] [-sideLength1 linear] [-sideLength2 linear] [-spansPerSide int]

nurbsSquare is undoable, queryable, and editable.

The nurbsSquare command creates a square

Return value

string[]Object name and node name

In query mode, return type is based on queried flag.

Flags

caching, center, centerX, centerY, centerZ, constructionHistory, degree, name, nodeState, normal, normalX, normalY, normalZ, object, sideLength1, sideLength2, spansPerSide
Long name (short name) Argument types Properties
-caching(-cch) boolean createqueryedit
Toggle caching for all attributes so that no recomputation is needed
-center(-c) linear linear linear createqueryedit
The center point of the square.
-centerX(-cx) linear createqueryedit
X of the center point.
Default: 0
-centerY(-cy) linear createqueryedit
Y of the center point.
Default: 0
-centerZ(-cz) linear createqueryedit
Z of the center point.
Default: 0
-degree(-d) int createqueryedit
The degree of the resulting circle: 1 - linear, 2 - quadratic, 3 - cubic, 5 - quintic, 7 - heptic
Default: 3
-nodeState(-nds) int createqueryedit

Maya dependency nodes have 6 possible states. The Normal (0), HasNoEffect (1), and Blocking (2) states can be used to alter how the graph is evaluated.

The Waiting-Normal (3), Waiting-HasNoEffect (4), Waiting-Blocking (5) are for internal use only. They temporarily shut off parts of the graph during interaction (e.g., manipulation). The understanding is that once the operation is done, the state will be reset appropriately, e.g. Waiting-Blocking will reset back to Blocking.

The Normal and Blocking cases apply to all nodes, while HasNoEffect is node specific; many nodes do not support this option. Plug-ins store state in the MPxNode::state attribute. Anyone can set it or check this attribute. Additional details about each of these 3 states follow.

State Description
Normal The normal node state. This is the default.
HasNoEffect

The HasNoEffect option (a.k.a. pass-through), is used in cases where there is an operation on an input producing an output of the same data type. Nearly all deformers support this state, as do a few other nodes. As stated earlier, it is not supported by all nodes.

It’s typical to implement support for the HasNoEffect state in the node’s compute method and to perform appropriate operations. Plug-ins can also support HasNoEffect.

The usual implementation of this state is to copy the input directly to the matching output without applying the algorithm in the node. For deformers, applying this state leaves the input geometry undeformed on the output.

Blocking

This is implemented in the depend node base class and applies to all nodes. Blocking is applied during the evaluation phase to connections. An evaluation request to a blocked connection will return as failures, causing the destination plug to retain its current value. Dirty propagation is indirectly affected by this state since blocked connections are never cleaned.

When a node is set to Blocking the behavior is supposed to be the same as if all outgoing connections were broken. As long as nobody requests evaluation of the blocked node directly it won’t evaluate after that. Note that a blocked node will still respond to getAttr requests but a getAttr on a downstream node will not reevaluate the blocked node.

Setting the root transform of a hierarchy to Blocking won’t automatically influence child transforms in the hierarchy. To do this, you’d need to explicitly set all child nodes to the Blocking state.

For example, to set all child transforms to Blocking, you could use the following script. 


import maya.cmds as cmds
def blockTree(root):
nodesToBlock = []
for node in {child:1 for child in cmds.listRelatives( root, path=True, allDescendents=True )}.keys():
nodesToBlock += cmds.listConnections(node, source=True, destination=True )
for node in {source:1 for source in nodesToBlock}.keys():
cmds.setAttr( '%s.nodeState' % node, 2 )

Applying this script would continue to draw objects but things would not be animated.


Default: kdnNormal
-normal(-nr) linear linear linear createqueryedit
The normal of the plane in which the square will lie.
-normalX(-nrx) linear createqueryedit
X of the normal direction.
Default: 0
-normalY(-nry) linear createqueryedit
Y of the normal direction.
Default: 0
-normalZ(-nrz) linear createqueryedit
Z of the normal direction.
Default: 1
-sideLength1(-sl1) linear createqueryedit
The length of a side on the square.
Default: 1.0
-sideLength2(-sl2) linear createqueryedit
The length of an adjacent side on the square.
Default: 1.0
-spansPerSide(-sps) int createqueryedit
The number of spans per side determines the resolution of the square.
Default: 1
Common flags
-constructionHistory(-ch) boolean create
Turn the construction history on or off.
-name(-n) string create
Sets the name of the newly-created node. If it contains namespace path, the new node will be created under the specified namespace; if the namespace does not exist, it will be created.
-object(-o) boolean create
Create the result, or just the dependency node.
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.

MEL examples

// create degree 1 square with side length 2, center (0,0,0) on the
// x-y plane
nurbsSquare -nr 0 0 1 -d 1 -c 0 0 0 -sl1 2 -sl2 2 ;

// create degree 2 rectangle with length 2,4 at origin on the x-y plane
nurbsSquare -d 2 -nr 0 0 1 -c 0 0 0 -sl1 2 -sl2 4 ;

// create square of degree 3,side lengths 3, 4 spans per side
nurbsSquare -nr 0 0 1 -c 0 0 0 -d 3 -sl1 3 -sl2 3 -sps 4;