MPxSurfaceShape Class Reference
Related help topics: #include <MPxSurfaceShape.h>
Class Description
Parent class of all user defined shapes.
MPxSurfaceShape is the parent class of all user defined shapes. User defined shapes are dependency nodes (and DAG nodes) which contain overridable drawing, selection, and component methods.
This class can be used to implement new kinds of shapes within Maya that can have selectable/manipulatable components and behave in a similar manner to the default shapes in maya.
The UI dependent aspects of the shape should be implemented in a class derived from MPxSurfaceShapeUI. This includes the drawing and interactive selection of the shape and any components that the shape implements.
- Examples:
Inheritance diagram for MPxSurfaceShape:
Public Member Functions | |
| MPxSurfaceShape () | |
| Class constructor. More... | |
| virtual | ~MPxSurfaceShape () |
| Class destructor. | |
| virtual MPxNode::Type | type () const |
| Returns the type of node that this is. More... | |
| virtual bool | isBounded () const |
| This method should be overridden to return true if the user supplies a bounding box routine. More... | |
| virtual MBoundingBox | boundingBox () const |
| This method should be overridden to return a bounding box for the shape. More... | |
| virtual bool | evalNodeAffectsDrawDb (const MEvaluationNode &evaluationNode) |
| This method should be overridden to return true if the evaluationNode contains any dirty plugs that will affect the drawing of your plug-in. More... | |
| virtual void | transformUsing (const MMatrix &mat, const MObjectArray &componentList) |
| Transform the given components using the specified transformation matrix. More... | |
| virtual void | transformUsing (const MMatrix &mat, const MObjectArray &componentList, MVertexCachingMode cachingMode, MPointArray *pointCache) |
| Transform the given components using the specified transformation matrix. More... | |
| virtual void | tweakUsing (const MMatrix &mat, const MObjectArray &componentList, MVertexCachingMode cachingMode, MPointArray *pointCache, MArrayDataHandle &handle) |
| Transform the given components using the specified transformation matrix. More... | |
| bool | convertToTweakNodePlug (MPlug &plug) const |
| Check if a tweak node is connected to this node. More... | |
| virtual void | weightedTransformUsing (const MTransformationMatrix &xform, const MMatrix *space, const MObjectArray &componentList, MVertexCachingMode cachingMode, MPointArray *pointCache, const MPlane *freezePlane) |
| Transform the given components with interpolation using the specified transformation matrix. More... | |
| virtual void | weightedTweakUsing (const MTransformationMatrix &xform, const MMatrix *space, const MObjectArray &componentList, MVertexCachingMode cachingMode, MPointArray *pointCache, const MPlane *freezePlane, MArrayDataHandle &handle) |
| Transform the given components with interpolation using the specified transformation matrix. More... | |
| virtual bool | vertexOffsetDirection (MObject &component, MVectorArray &direction, MVertexOffsetMode mode, bool normalize) |
| This method should be overridden if the shape supports components that can be moved in the direction of the normal or UV's using the move vertex normal tool. More... | |
| virtual MObject | newControlPointComponent () const |
| The default action of this method is to return an MFnSingleIndexedComponent (of type MFn::kMeshVertComponent) in order to support rigid skinning binds. More... | |
| virtual void | componentToPlugs (MObject &component, MSelectionList &selectionList) const |
| Converts the given component into a selection list of plugs. More... | |
| virtual bool | match (const MSelectionMask &mask, const MObjectArray &componentList) const |
| This method is used to check for matches between a selection type (or mask) and a given component. More... | |
| virtual MatchResult | matchComponent (const MSelectionList &item, const MAttributeSpecArray &spec, MSelectionList &list) |
| This method is used to convert the string representation of a component into a component object and to validate that the indices. More... | |
| virtual MSelectionMask | getShapeSelectionMask () const |
| This routine must be overridden if the shape is to support interactive object selection in Viewport 2.0 and should provide information about the selection mask of the shape. More... | |
| virtual MSelectionMask | getComponentSelectionMask () const |
| This routine must be overridden if the shape is to support interactive component selection in Viewport 2.0 and should provide information about the selection mask of the shape component. More... | |
| virtual MObject | createFullVertexGroup () const |
| This method is used to create a component containing every vertex/CV in the object. More... | |
| virtual MObject | createFullRenderGroup () const |
| This method is used to create a component containing every renderable element in the object. More... | |
| virtual MFn::Type | renderGroupComponentType () const |
| This method is used to return the type of renderable components for this shape. More... | |
| virtual bool | deleteComponents (const MObjectArray &componentList, MDoubleArray &undoInfo) |
| This method should be overridden if the shape is to support deletion of components. More... | |
| virtual bool | undeleteComponents (const MObjectArray &componentList, MDoubleArray &undoInfo) |
| This method should be overridden if the shape is to support undeletion of components. More... | |
| virtual MObject | localShapeInAttr () const |
| Returns the attribute containing the shape's input geometry in local space. More... | |
| virtual MObject | localShapeOutAttr () const |
| Returns the attribute containing the shape's output geometry in local space. More... | |
| virtual MObject | worldShapeOutAttr () const |
| Returns the attribute containing the shape's output geometry in world space. More... | |
| virtual MObject | cachedShapeAttr () const |
| Returns the attribute containing the shape's cached geometry, if it has one. More... | |
| virtual MObject | geometryData () const |
| Returns the geometry data of the shape. More... | |
| virtual bool | canMakeLive () const |
| This method is used by Maya to determine whether a surface can be made live. More... | |
| virtual bool | closestPoint (const MPoint &raySource, const MVector &rayDirection, MPoint &theClosestPoint, MVector &theClosestNormal, bool findClosestOnMiss, double tolerance=MPoint_kTol) |
| This method is used by Maya for snapping queries when your surface is live. More... | |
| virtual void | closestPoint (const MPoint &toThisPoint, MPoint &theClosestPoint, double tolerance=MPoint_kTol) |
| This method is used by Maya in functions (such as select) that require closest point information from your surface. More... | |
| virtual bool | pointAtParm (const MPoint &atThisParm, MPoint &evaluatedPoint) |
| This method is used by Maya in functions (such as select) that require point at parameter values. More... | |
| virtual MPxGeometryIterator * | geometryIteratorSetup (MObjectArray &, MObject &, bool forReadOnly=false) |
| This method should be overridden by the user to return a geometry iterator compatible with the user's geometry. More... | |
| virtual bool | acceptsGeometryIterator (bool writeable=true) |
| If the shape can supply a component iterator then then this method should be overridden to return true. More... | |
| virtual bool | acceptsGeometryIterator (MObject &, bool writeable=true, bool forReadOnly=false) |
| If the shape can supply a component iterator then then this method should be overridden to return true. More... | |
| virtual bool | excludeAsPluginShape () const |
| A Maya viewport can be set to not display "Plugin Shapes", which means shapes derived from MPxSurfaceShape. More... | |
| MObjectArray | activeComponents () const |
| Returns a list of active (selected) components for the shape. More... | |
| bool | hasActiveComponents () const |
| This method is used to determine whether or not the shape has active (selected) components. More... | |
| void | childChanged (MChildChanged=kObjectChanged) |
| This method can be used to trigger the shape to recalculate its bounding box. More... | |
| bool | isRenderable () const |
| Returns true if the shape is a renderable shape. More... | |
| void | setRenderable (bool) |
| Specifies whether the shape is a renderable shape. More... | |
| MMatrix | getWorldMatrix (MDataBlock &, unsigned int) const |
| Returns MMatrix which takes a point from local object space to world space. More... | |
| Public Member Functions inherited from MPxNode | |
| MPxNode () | |
| Constructor. More... | |
| virtual | ~MPxNode () |
| Destructor. | |
| virtual void | postConstructor () |
| Post constructor. More... | |
| virtual MStatus | compute (const MPlug &, MDataBlock &) |
| This method should be overridden in user defined nodes. More... | |
| virtual bool | getInternalValue (const MPlug &, MDataHandle &) |
| This method is overridden by nodes that store attribute data in some internal format. More... | |
| virtual bool | setInternalValue (const MPlug &, const MDataHandle &) |
| This method is overridden by nodes that store attribute data in some internal format. More... | |
| virtual int | internalArrayCount (const MPlug &) const |
| This method is overridden by nodes that have internal array attributes which are not stored in Maya's datablock. More... | |
| virtual void | copyInternalData (MPxNode *) |
| This method is overridden by nodes that store attribute data in some internal format. More... | |
| virtual MStatus | legalConnection (const MPlug &, const MPlug &, bool asSrc, bool &isLegal) const |
| This method allows you to check for legal connections being made to attributes of this node. More... | |
| virtual MStatus | legalDisconnection (const MPlug &, const MPlug &, bool asSrc, bool &isLegal) const |
| This method allows you to check for legal disconnections being made to attributes of this node. More... | |
| virtual MStatus | setDependentsDirty (const MPlug &plug, MPlugArray &plugArray) |
| This method can be overridden in user defined nodes to specify which plugs should be set dirty based upon an input plug {plugBeingDirtied} which Maya is marking dirty. More... | |
| virtual MStatus | preEvaluation (const MDGContext &context, const MEvaluationNode &evaluationNode) |
| Prepare a node's internal state for threaded evaluation. More... | |
| virtual MStatus | postEvaluation (const MDGContext &context, const MEvaluationNode &evaluationNode, PostEvaluationType evalType) |
| Clean up node's internal state after threaded evaluation. More... | |
| virtual SchedulingType | schedulingType () const |
| When overridden this method controls the degree of parallelism supported by the node during threaded evaluation. More... | |
| virtual MStatus | connectionMade (const MPlug &, const MPlug &, bool asSrc) |
| This method gets called when connections are made to attributes of this node. More... | |
| virtual MStatus | connectionBroken (const MPlug &, const MPlug &, bool asSrc) |
| This method gets called when connections are broken with attributes of this node. More... | |
| virtual MStatus | dependsOn (const MPlug &, const MPlug &, bool &depends) const |
| This method may be overridden by the user defined node. More... | |
| virtual bool | isPassiveOutput (const MPlug &) const |
| This method may be overridden by the user defined node if it wants to provide output attributes which do not prevent value modifications to the destination attribute. More... | |
| virtual MStatus | shouldSave (const MPlug &, bool &isSaving) |
| This method may be overridden by the user defined node. More... | |
| virtual MPlug | passThroughToOne (const MPlug &) const |
| This method may be overridden by nodes that have a one-to-one relationship between an input attribute and a corresponding output attribute. More... | |
| virtual bool | passThroughToMany (const MPlug &, MPlugArray &) const |
| This method is overridden by nodes that want to control the traversal behavior of some Maya search algorithms which traverse the history/future of shape nodes looking for directly related nodes. More... | |
| virtual bool | isAbstractClass () const |
| Override this class to return true if this node is an abstract node. More... | |
| virtual MStringArray | getFilesToArchive (bool shortName=false, bool unresolvedName=false, bool markCouldBeImageSequence=false) const |
| Use this method to return all external files used by this node. More... | |
| virtual void | getExternalContent (MExternalContentInfoTable &table) const |
| Returns the external content (files) that this node depends on. More... | |
| bool | addExternalContentForFileAttr (MExternalContentInfoTable &, const MObject &attr) const |
| Adds content info to the specified table from a file path attribute. More... | |
| bool | setExternalContentForFileAttr (const MObject &attr, const MExternalContentLocationTable &) |
| Sets content info in the specified attribute from the table. More... | |
| virtual void | setExternalContent (const MExternalContentLocationTable &) |
| Changes the location of external content in batch. More... | |
| virtual MTypeId | typeId () const |
| Returns the TYPEID of this node. More... | |
| virtual MString | typeName () const |
| Returns the type name of this node. More... | |
| virtual MString | name () const |
| Returns the name of this particular instance of this class. More... | |
| virtual MObject | thisMObject () const |
| Returns the MObject associated with this user defined node. More... | |
| virtual MStatus | setExistWithoutInConnections (bool flag) |
| This method specifies whether or not the node can exist without input connections. More... | |
| virtual bool | existWithoutInConnections (MStatus *ReturnStatus=NULL) const |
| Determines whether or not this node can exist without input connections. More... | |
| virtual MStatus | setExistWithoutOutConnections (bool flag) |
| This method specifies whether or not the node can exist without output connections. More... | |
| virtual bool | existWithoutOutConnections (MStatus *ReturnStatus=NULL) const |
| Determines whether or not this node can exist without output connections. More... | |
| MDataBlock | _forceCache (const MDGContext &) |
| This method is obsolete. More... | |
| virtual bool | getInternalValueInContext (const MPlug &, MDataHandle &, MDGContext &) |
| This method is obsolete. More... | |
| virtual bool | setInternalValueInContext (const MPlug &, const MDataHandle &, MDGContext &) |
| This method is obsolete. More... | |
| virtual int | internalArrayCount (const MPlug &, const MDGContext &) const |
| This method is obsolete. More... | |
Static Public Member Functions | |
| static const char * | className () |
| Returns the name of this class. More... | |
| Static Public Member Functions inherited from MPxNode | |
| static MStatus | addAttribute (const MObject &attr) |
| This method adds a new attribute to a user defined node type during the type's initialization. More... | |
| static MStatus | inheritAttributesFrom (const MString &parentClassName) |
| This method allows a class of plugin node to inherit all of the attributes of a second class of plugin node. More... | |
| static MStatus | attributeAffects (const MObject &whenChanges, const MObject &isAffected) |
| This method specifies that a particular input attribute affects a specific output attribute. More... | |
| static const char * | className () |
| Returns the name of this class. More... | |
Static Public Attributes | |
| static MObject | mControlPoints |
| Control points for the derived shapes. | |
| static MObject | mControlValueX |
| X value of a control point. | |
| static MObject | mControlValueY |
| Y value of a control point. | |
| static MObject | mControlValueZ |
| Z value of a control point. | |
| static MObject | nodeBoundingBox |
| bounding box attribute | |
| static MObject | nodeBoundingBoxMin |
| bounding box minimum point | |
| static MObject | nodeBoundingBoxMinX |
| X component of boundingBoxMin. | |
| static MObject | nodeBoundingBoxMinY |
| Y component of boundingBoxMin. | |
| static MObject | nodeBoundingBoxMinZ |
| Z component of boundingBoxMin. | |
| static MObject | nodeBoundingBoxMax |
| bounding box maximum point | |
| static MObject | nodeBoundingBoxMaxX |
| X component of boundingBoxMax. | |
| static MObject | nodeBoundingBoxMaxY |
| Y component of boundingBoxMax. | |
| static MObject | nodeBoundingBoxMaxZ |
| Z component of boundingBoxMax. | |
| static MObject | nodeBoundingBoxSize |
| bounding box size vector | |
| static MObject | nodeBoundingBoxSizeX |
| X component of boundingBoxSize. | |
| static MObject | nodeBoundingBoxSizeY |
| Y component of boundingBoxSize. | |
| static MObject | nodeBoundingBoxSizeZ |
| Z component of boundingBoxSize. | |
| static MObject | center |
| object center attribute | |
| static MObject | boundingBoxCenterX |
| X component of boundingBoxCenter. | |
| static MObject | boundingBoxCenterY |
| Y component of boundingBoxCenter. | |
| static MObject | boundingBoxCenterZ |
| Z component of boundingBoxCenter. | |
| static MObject | matrix |
| matrix attribute | |
| static MObject | inverseMatrix |
| inverse matrix attribute | |
| static MObject | worldMatrix |
| world matrix attribute | |
| static MObject | worldInverseMatrix |
| inverse world matrix attribute | |
| static MObject | parentMatrix |
| parent matrix attribute | |
| static MObject | parentInverseMatrix |
| inverse parent matrix attribute | |
| static MObject | visibility |
| visibility attribute | |
| static MObject | intermediateObject |
| intermediate object attribute | |
| static MObject | isTemplated |
| template attribute | |
| static MObject | instObjGroups |
| instances object group info attribute | |
| static MObject | objectGroups |
| object groups attributes | |
| static MObject | objectGrpCompList |
| component in object groups attribute | |
| static MObject | objectGroupId |
| group id attribute | |
| static MObject | objectGroupColor |
| group id attribute | |
| static MObject | useObjectColor |
| controls choice of wireframe dormant object color | |
| static MObject | objectColor |
| the per object dormant wireframe color | |
| Static Public Attributes inherited from MPxNode | |
| static MObject | message |
| message attribute | |
| static MObject | isHistoricallyInteresting |
| is historically interesting attribute | |
| static MObject | caching |
| caching attribute | |
| static MObject | state |
| state attribute | |
| static MObject | frozen |
| frozen attribute | |
Additional Inherited Members | |
| Protected Member Functions inherited from MPxNode | |
| virtual MDataBlock | forceCache () |
| USE _forceCache() IN SCRIPT. More... | |
| virtual void | setMPSafe (bool flag) |
| USE _setMPSafe() IN SCRIPT. More... | |
| virtual MStatus | setDoNotWrite (bool flag) |
| USE _setDoNotWrite() IN SCRIPT. More... | |
| virtual bool | doNotWrite (MStatus *ReturnStatus=NULL) const |
| USE _doNotWrite() IN SCRIPT. More... | |
| virtual MDataBlock | forceCache (const MDGContext &) |
| This method is obsolete. More... | |
Member Enumeration Documentation
| enum MVertexCachingMode |
Vertex caching modes.
| enum MVertexOffsetMode |
| enum MatchResult |
Return values for the matchComponent() method.
| enum MChildChanged |
Constructor & Destructor Documentation
| OPENMAYA_MAJOR_NAMESPACE_OPEN MPxSurfaceShape | ( | ) |
Class constructor.
Any calls the MPxSurfaceShape methods must be done in the postConstructor method and not here.
Member Function Documentation
|
virtual |
Returns the type of node that this is.
This is used to differentiate user defined nodes that are derived off different MPx base classes.
It is not necessary to override this method.
- Returns
- Type of the node (MPxNode::kSurfaceShape)
Reimplemented from MPxNode.
|
virtual |
This method should be overridden to return true if the user supplies a bounding box routine.
Supplying a bounding box routine makes refresh and selection more efficient.
- Returns
- A boolean value indicating whether a bounding box routine has been supplied
- Examples:
|
virtual |
This method should be overridden to return a bounding box for the shape.
If this method is overridden, then MPxSurfaceShape::isBounded should also be overridden to return true.
- Returns
- The bounding box of the shape
- Examples:
|
virtual |
This method should be overridden to return true if the evaluationNode contains any dirty plugs that will affect the drawing of your plug-in.
- Parameters
-
[in] evaluationNode Evaluation information for this surface node
- Returns
- True if the evaluationNode contains plugs that will affect drawing
|
virtual |
Transform the given components using the specified transformation matrix.
This method should be overridden if the shape supports components that can be transformed using maya's move, scale, and rotate tools.
- Parameters
-
[in] matrix the matrix representing the transformation that is to be applied to the components [in] componentList a list of components to be tranformed. If the list is empty, it indicates that every point in the geometry should be transformed.
Reimplemented in MPxComponentShape.
- Examples:
|
virtual |
Transform the given components using the specified transformation matrix.
This method should be overridden if the shape supports components that can be transformed using maya's move, scale, and rotate tools.
- Parameters
-
[in] mat the matrix representing the transformation that is to be applied to the components [in] componentList a list of components to be transformed. If the list is empty, it indicates that every point in the geometry should be transformed. [in] cachingMode whether the points should be cached in the pointCache argument, or restored from the pointCache [in] pointCache used to store for undo and restore points during undo
Reimplemented in MPxComponentShape.
|
virtual |
Transform the given components using the specified transformation matrix.
This method should be overridden if the shape supports components that can be transformed using maya's move, scale, and rotate tools. This method is called when the shape has history & connected to a tweak node. The most common reason why the shape would be connected to a tweak node is if it is being deformed. When a shape is connected to a tweak node, transformations applied to the points are placed in the tweak node rather than in the shape itself.
- Parameters
-
[in] mat the matrix representing the transformation that is to be applied to the components [in] componentList a list of components to be tranformed. If the list is empty, it indicates that every point in the geometry should be transformed. [in] cachingMode whether the points should be cached in the pointCache argument, or restored from the pointCache [in] pointCache used to store for undo and restore points during undo [in] handle array data handle where the tweaks are stored
- Examples:
| bool convertToTweakNodePlug | ( | MPlug & | plug | ) | const |
Check if a tweak node is connected to this node.
If it is, then reset the supplied plug to contain the controlPoints attribute on the tweak node.
- Parameters
-
[in] plug plug which will be set to point to the associated tweak node plug if a tweak node is connected
- Returns
- true if a tweak node was found, false if the plug was unchanged
|
virtual |
Transform the given components with interpolation using the specified transformation matrix.
If not overridden, then a default implementation will be used to perform the transformation and interpolation. The default implementation calls setPoint() for each transformed point.
- Parameters
-
[in] xform the matrix representing the transformation that is to be applied to the components [in] space the matrix representing the transformation space to perform the interpolated transformation. A value of NULL indicates it should be ignored. [in] componentList a list of components to be transformed and their weights. This list will not be empty. [in] cachingMode whether the points should be added/updated in the pointCache, restored from the pointCache, or transform using use the original values in the pointCache. [in] pointCache used to store for undo and restore points during undo [in] freezePlane used for symmetric transformation of components. A value of NULL indicates it is not used and there is no symmetric transformation.
- Examples:
|
virtual |
Transform the given components with interpolation using the specified transformation matrix.
This method is called for transforming components using maya's move, scale, and rotate tools when the shape has history and is connected to a tweak node. The most common reason why the shape would be connected to a tweak node is if it is being deformed. When a shape is connected to a tweak node, transformations applied to the points are placed in the tweak node rather than in the shape itself.
If not overridden, then a default implementation will be used to perform the transformation and interpolation. The default implementation calls setPoint() for each transformed point.
- Parameters
-
[in] xform the matrix representing the transformation that is to be applied to the components [in] space the matrix representing the transformation space to perform the interpolated transformation. A value of NULL indicates it should be ignored. [in] componentList a list of components to be transformed and their weights. This list will not be empty. [in] cachingMode whether the points should be added/updated in the pointCache, restored from the pointCache, or transform using the original values in the pointCache. [in] pointCache used to store for undo and restore points during undo [in] freezePlane used for symmetric transformation of components. A value of NULL indicates it is not used and there is no symmetric transformation. [in] handle array data handle where the tweaks are stored
- Examples:
|
virtual |
This method should be overridden if the shape supports components that can be moved in the direction of the normal or UV's using the move vertex normal tool.
This method should calculate the offset direction for a vertex components. The direction vector array is an array of offsets corresponding to the elements in the component. The mode argument specifies the type of movement that is being performed.
The default for this method is to return false, i.e. no support for move normal tool.
- Parameters
-
[in] component [in] direction [in] mode The type of vertex movement
- mode = 0 -> normal
- mode = 1 -> U
- mode = 2 -> V
- mode = 3 -> UVN triad
- Parameters
-
[in] normalize specifies whether the offset vectors should be normalized
- Returns
- true if the shape supports the current mode, false if the shape cannot do the requested vertex move
- Examples:
|
virtual |
The default action of this method is to return an MFnSingleIndexedComponent (of type MFn::kMeshVertComponent) in order to support rigid skinning binds.
This method can be overridden to support other types of components such as MFnDoubleIndexedComponent and MFnTripleIndexedComponent and should return a new component of that type. The types allowed are those listed in the create() method docs for each MFn*IndexedComponent.
No argument is required.
The skinning code handles the deallocation of the new component.
- Returns
- The new component
|
virtual |
Converts the given component into a selection list of plugs.
This method is used to associate a shapes components into the corresponding attributes (plugs) within the shape. For example, it gets called by the translate manipulator to determine which attributes should be driven by the manipulator, and by the setKeyframe command to determine where to connect animCurves for components.
This method should be overridden if the shape supports components that can be selected and moved in Maya.
- Parameters
-
[in] component the component to be converted [in] list a selection list where the plug should be added
Reimplemented in MPxComponentShape.
- Examples:
|
virtual |
This method is used to check for matches between a selection type (or mask) and a given component.
If your shape has components representing attributes then this method is used to match up your components with selection masks.
This is used by sets and deformers to make sure that the selected components fall into the "vertex only" category. This is useful when you want to make sure that only a particular component can be deformed.
- Parameters
-
[in] mask the selection mask to test against [in] componentList a list of components to be tested
- Returns
- true the match was successfull
- false the match failed
Reimplemented in MPxComponentShape.
- Examples:
|
virtual |
This method is used to convert the string representation of a component into a component object and to validate that the indices.
This method should be overridden if the shape has components.
- Parameters
-
[in] item DAG selection item for the object being matched [in] spec attribute specification object [in] list list to add components to
- Returns
- The component match result
- Examples:
|
virtual |
This routine must be overridden if the shape is to support interactive object selection in Viewport 2.0 and should provide information about the selection mask of the shape.
- Returns
- The selection mask of the shape.
- Examples:
|
virtual |
This routine must be overridden if the shape is to support interactive component selection in Viewport 2.0 and should provide information about the selection mask of the shape component.
- Returns
- The selection mask of the shape components.
- Examples:
|
virtual |
This method is used to create a component containing every vertex/CV in the object.
This method is supposed to return non-NULL only if the dag object contains vertices/CVs (control points), so derived classes that do should override this method.
Eg: use MFnSingleIndexedComponent::setCompleteData( numVertices ) to specify that a component represents all the vertices of the shape.
- Returns
- A component containing all of the vertices in the shape.
Reimplemented in MPxComponentShape.
- Examples:
|
virtual |
This method is used to create a component containing every renderable element in the object.
This method is supposed to return non-NULL only if the dag object contains renderable components. Type of the return component should is the same as the one returned by MPxSurfaceShape::renderGroupComponentType().
Eg: use MFnSingleIndexedComponent::setCompleteData( numFaces ) to specify that a component represents all the faces of the shape.
- Returns
- A component containing all of renderable elements in the shape.
|
virtual |
This method is used to return the type of renderable components for this shape.
It should return a type among MFn::kMeshPolygonComponent, MFn::kSubdivFaceComponent and MFn::kSurfaceFaceComponent, which is used in the creation of per-face/patch shader assignment.
- Returns
- the type of renderable components for this shape.
|
virtual |
This method should be overridden if the shape is to support deletion of components.
A list of components to be deleted will be passed in as well as an array of doubles where information about each deleted component can be stored for undo purposes. A typical use for this array is to store knot values or weights for control points that are deleted.
- Parameters
-
[in] componentList List of components to be deleted [in] undoInfo Values used for undo purposes
- Returns
- true if this method was successful, false otherwise
|
virtual |
This method should be overridden if the shape is to support undeletion of components.
A list of components to be deleted will be passed in as well as an array of doubles where information about each deleted component is stored for undo purposes. A typical use for this array is to store knot values or weights for control points that are deleted.
- Parameters
-
[in] componentList List of components that were deleted [in] undoInfo Values used for undo purposes
- Returns
- true if this method was successful, false otherwise
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virtual |
Returns the attribute containing the shape's input geometry in local space.
The attribute must be writable and of a geometry data type (e.g. MFn::kGeometryData, MFn::kPluginGeometryData, etc).
This method will be called by Maya to determine if the shape has construction history and must be overridden if the shape is to support deformers.
- Returns
- The input attribute
Reimplemented in MPxComponentShape.
- Examples:
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virtual |
Returns the attribute containing the shape's output geometry in local space.
The attribute must be readable and of a geometry data type (e.g. MFn::kGeometryData, MFn::kPluginGeometryData, etc).
This method must be overridden if the shape is to support deformers.
- Returns
- The output attribute
- Examples:
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Returns the attribute containing the shape's output geometry in world space.
The attribute must be readable and of a geometry data type (e.g. MFn::kGeometryData, MFn::kPluginGeometryData, etc).
This method must be overridden if the shape is to support deformers.
- Returns
- The world space output attribute
- Examples:
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Returns the attribute containing the shape's cached geometry, if it has one.
The attribute must be readable, writable and of a geometry data type (e.g. MFn::kGeometryData, MFn::kPluginGeometryData, etc).
- Returns
- The attribute that stores the cached shape
- Examples:
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Returns the geometry data of the shape.
The geometry data must be derived from the MPxGeometryData class.
The data is used by Maya to add, edit and query component grouping (set) information for the shape. This set information is stored and managed by Maya's shape base class, geometryShape.
- Returns
- The geometry data of the shape
- Examples:
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This method is used by Maya to determine whether a surface can be made live.
It can be overridden to return true if you wish to allow your surface to be made live. If you return true, you will also need to implement both closestPoint() overloads. The default is to return false.
- Returns
- true if the surface can be made live, false otherwise
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This method is used by Maya for snapping queries when your surface is live.
If you override this method, you should set theClosestPoint to the closest point on your surface intersected by the ray defined by raySource and rayDirection. You should also populate the theClosestNormal parameter with the surface normal at that intersection point.
If no intersection is found and findClosestOnMiss is true, you should still provide a point on your surface closest to the ray defined by raySource and rayDirection. When used for live snapping, this allows the user to click and drag outside the bounds of a live surface and still have it snap to the nearest point on it within the viewport. Note, performing a pure 3D closest point of approach test in this situation may not give the most natural result for live mesh snapping. To provide behavior that matches Maya, you can project your surface onto the plane defined by the ray, then perform your calculations. This will account for view perspective and give accurate live snap points along the silhouette of the surface.
If findClosestOnMiss is false, you should not provide a point and normal when the ray misses.
canMakeLive() must also be overridden to return true.
- Parameters
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[in] raySource the origin of the ray to test against [in] rayDirection the direction of the ray to test against [out] theClosestPoint the closest point on your surface [out] theClosestNormal the normal at the closest point on your surface [in] findClosestOnMiss when true, you should calculate theClosestPoint and theClosestNormal even if the ray misses your surface. [in] tolerance tolerance to use in your calculations
- Returns
- true if theClosestPoint and theClosestNormal have been set, false otherwise
- Examples:
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This method is used by Maya in functions (such as select) that require closest point information from your surface.
If you've overridden canMakeLive() to return true, this method is also used by Maya for some snapping queries when your surface is live.
- Parameters
-
[in] toThisPoint the point to test against [out] theClosestPoint the closest point on your surface [in] tolerance tolerance to use in your calculations
This method is used by Maya in functions (such as select) that require point at parameter values.
This only makes sense for parametric surfaces such as NURBS.
- Parameters
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[in] atThisParm the parameter to check [out] evaluatedPoint the surface point
- Returns
- true if a point was found, false otherwise
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This method should be overridden by the user to return a geometry iterator compatible with the user's geometry.
A geometry iterator is used for iterating over the components of a shape, such as the vertices of a mesh, in a generic manner.
The components to be iterated over are passed to this function in on of two ways, as a list of components, or as a single component. Only one of these arguments is used at any particular time.
- Parameters
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[in] componentList a list of components to be iterated over [in] components the components to be iterated over [in] forReadOnly specifies whether the iterator is for read-only
- Returns
- The component match result
- Examples:
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If the shape can supply a component iterator then then this method should be overridden to return true.
The default is to return false.
- Parameters
-
[in] writeable is this component type writable by an iterator
- Returns
- true the shape can supply an iterator
- false the shape cannot supply an iterator
- Examples:
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virtual |
If the shape can supply a component iterator then then this method should be overridden to return true.
The default is to return false. The component argument can be used to when the shape has multiple components and not all of them can be iterator over.
- Parameters
-
[in] component the component to test [in] writeable is this component type writable by an iterator [in] forReadOnly is this component type readable by an iterator
- Returns
- true the shape can supply an iterator
- false the shape cannot supply an iterator
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A Maya viewport can be set to not display "Plugin Shapes", which means shapes derived from MPxSurfaceShape.
By overriding excludeAsPluginShape() to return false, you can change that behaviour so that this shape is still displayed even when the display of "Plugin Shapes" is disabled.
The default implementation returns true.
- Returns
- true to have this shape obey the "Plugin Shapes" settings in the viewport's "Show" menu; false to have it ignore that setting
| MObjectArray activeComponents | ( | ) | const |
Returns a list of active (selected) components for the shape.
- Returns
- An array of active components
| bool hasActiveComponents | ( | ) | const |
This method is used to determine whether or not the shape has active (selected) components.
- Returns
- true there are active components
- false there are no active components
| void childChanged | ( | MChildChanged | state = kObjectChanged | ) |
This method can be used to trigger the shape to recalculate its bounding box.
- Parameters
-
[in] state the type of change that has occurred
| bool isRenderable | ( | ) | const |
Returns true if the shape is a renderable shape.
Making a shape renderable allows the shape to have shading group assignments.
- Returns
- true the shape is renderable
- false the shape is not renderable
| void setRenderable | ( | bool | flag | ) |
Specifies whether the shape is a renderable shape.
Making a shape renderable allows the shape to have shading group assignments.
- Parameters
-
[in] flag true if the shape is to be renderable, false otherwise
| MMatrix getWorldMatrix | ( | MDataBlock & | block, |
| unsigned int | instanceGeom | ||
| ) | const |
Returns MMatrix which takes a point from local object space to world space.
- Parameters
-
[in] block a MDataBlock [in] instanceGeom the instance this MPxSurfaceShape corresponds to
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static |
Returns the name of this class.
- Returns
- The name of this class.
The documentation for this class was generated from the following files:
- MPxSurfaceShape.h
- MPxSurfaceShape.cpp