Open Inventor Release 2023.2.3
 
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SoBaseExtrusion Class Reference

Abstract base class for all extrusion-based shape nodes. More...

#include <Inventor/nodes/SoBaseExtrusion.h>

+ Inheritance diagram for SoBaseExtrusion:

Public Types

enum  ScaleMode {
  DEFAULT ,
  SPINE_ONLY ,
  SECTION_ONLY ,
  NONE
}
 
enum  ExtrusionMode {
  SMOOTH = 0 ,
  BASIC = 1 ,
  SMOOTH_WITHOUT_SELF_INTERSECTIONS = 2
}
 
- Public Types inherited from SoShape
enum  ShapeType {
  POINTS ,
  LINES ,
  POLYGONS ,
  TEXT
}
 Basic type for antialiased rendering for this shape (Do not consider the SoDrawStyle property currently in the state). More...
 

Public Member Functions

virtual SoType getTypeId () const
 Returns the type identifier for this specific instance.
 
- Public Member Functions inherited from SoShape
virtual SbBool affectsState () const
 Overrides default method on SoNode.
 
ShapeType getShapeType ()
 Gets the current shape Full Scene Antialiasing type.
 
- Public Member Functions inherited from SoNode
virtual void setOverride (const SbBool state)
 Turns the override flag on or off.
 
virtual SbBool isOverride () const
 Returns the state of the override flag.
 
virtual SoNodecopy (SbBool copyConnections=FALSE) const
 Creates and returns an exact copy of the node.
 
virtual void touch ()
 Marks an instance as modified, simulating a change to it.
 
- Public Member Functions inherited from SoFieldContainer
void setToDefaults ()
 Sets all fields in this object to their default values.
 
SbBool hasDefaultValues () const
 Returns TRUE if all of the object's fields have their default values.
 
SbBool fieldsAreEqual (const SoFieldContainer *fc) const
 Returns TRUE if this object's fields are exactly equal to fc's fields.
 
void copyFieldValues (const SoFieldContainer *fc, SbBool copyConnections=FALSE)
 Copies the contents of fc's fields into this object's fields.
 
SoNONUNICODE SbBool set (const char *fieldDataString)
 Sets one or more fields in this object to the values specified in the given string, which should be a string in the Open Inventor file format.
 
SbBool set (const SbString &fieldDataString)
 Sets one or more fields in this object to the values specified in the given string, which should be a string in the Open Inventor file format.
 
void get (SbString &fieldDataString)
 Returns the values of the fields of this object in the Open Inventor ASCII file format in the given string.
 
virtual int getFields (SoFieldList &list) const
 Appends references to all of this object's fields to resultList, and returns the number of fields appended.
 
virtual int getAllFields (SoFieldList &list) const
 Returns a list of fields, including the eventIn's and eventOut's.
 
virtual SoFieldgetField (const SbName &fieldName) const
 Returns a the field of this object whose name is fieldName.
 
virtual SoFieldgetEventIn (const SbName &fieldName) const
 Returns a the eventIn with the given name.
 
virtual SoFieldgetEventOut (const SbName &fieldName) const
 Returns the eventOut with the given name.
 
SbBool getFieldName (const SoField *field, SbName &fieldName) const
 Returns the name of the given field in the fieldName argument.
 
SbBool enableNotify (SbBool flag)
 Notification at this Field Container is enabled (if flag == TRUE) or disabled (if flag == FALSE).
 
SbBool isNotifyEnabled () const
 Notification is the process of telling interested objects that this object has changed.
 
virtual void setUserData (void *data)
 Sets application data.
 
void * getUserData (void) const
 Gets user application data.
 
- Public Member Functions inherited from SoBase
virtual SbName getName () const
 Returns the name of an instance.
 
virtual void setName (const SbName &name)
 Sets the name of an instance.
 
void setSynchronizable (const bool b)
 Sets this to be a ScaleViz synchronizable object.
 
bool isSynchronizable () const
 Gets the ScaleViz synchronizable state of this object.
 
- Public Member Functions inherited from SoRefCounter
void ref () const
 Adds a reference to an instance.
 
void unref () const
 Removes a reference from an instance.
 
void unrefNoDelete () const
 unrefNoDelete() should be called when it is desired to decrement the reference count, but not delete the instance if this brings the reference count to zero.
 
int getRefCount () const
 Returns current reference count.
 
void lock () const
 lock this instance.
 
void unlock () const
 unlock this instance.
 
- Public Member Functions inherited from SoTypedObject
SbBool isOfType (const SoType &type) const
 Returns TRUE if this object is of the type specified in type or is derived from that type.
 
template<typename TypedObjectClass >
SbBool isOfType () const
 Returns TRUE if this object is of the type of class TypedObjectClass or is derived from that class.
 

Static Public Member Functions

static SoType getClassTypeId ()
 Returns the type identifier for this class.
 
- Static Public Member Functions inherited from SoShape
static SoType getClassTypeId ()
 Returns the type identifier for this class.
 
static SbBool isPrimitiveRestartAvailable (SoState *state=NULL)
 Returns TRUE if the primitive restart feature is available.
 
- Static Public Member Functions inherited from SoNode
static SoType getClassTypeId ()
 Returns the type identifier for this class.
 
static SoNodegetByName (const SbName &name)
 A node's name can be set using SoBase::setName().
 
static int getByName (const SbName &name, SoNodeList &list)
 A node's name can be set using SoBase::setName().
 
- Static Public Member Functions inherited from SoFieldContainer
static SoType getClassTypeId ()
 Returns the type of this class.
 
- Static Public Member Functions inherited from SoBase
static SoType getClassTypeId ()
 Returns type identifier for this class.
 
- Static Public Member Functions inherited from SoTypedObject
static SoType getClassTypeId ()
 Returns the type identifier for this class.
 

Public Attributes

SoSFBool beginCap
 If TRUE, begin planar cap surfaces generated.
 
SoSFBool endCap
 If TRUE, end planar cap surfaces generated.
 
SoMFVec3f spine
 Spine points.
 
SoSFEnum scaleMode
 Scaling behavior of the extrusion.
 
SoSFEnum extrusionMode
 Construction behavior of the extrusion.
 
- Public Attributes inherited from SoShape
SoSFBool boundingBoxIgnoring
 Whether to ignore this node during bounding box traversal.
 

Friends

class inventor::impl::SoExtrusionImpl
 

Detailed Description

Abstract base class for all extrusion-based shape nodes.

This node is the abstract base class for all extrusion-based shape (geometry) nodes. It is used as a repository for convenience functions for subclasses and to provide a type identifier to make it easy to determine whether a shape is extrusion-based.

All extrusion-based shapes are created by extruding a 2D shape along a 3D spine. The user can determine which caps are created using the fields beginCap and endCap.

The scaleMode field is used to select the points that will be scaled by the scaleFactor in the current transformation (for example SoTransform), if any. Translation and rotation are applied in all cases.

The extrusionMode field is used to select the extrusion algorithm.

FILE FORMAT/DEFAULT

    This is an abstract class. See the reference page of a derived class for the format and default values.

SEE ALSO

SoExtrusion, SoCircularExtrusion

Definition at line 76 of file SoBaseExtrusion.h.

Member Enumeration Documentation

◆ ExtrusionMode

Enumerator
SMOOTH 

Default extrusion algorithm.

The algorithm uses constant section parts cut at spine points in a way similar to what a framer would do to build a frame. This provides a better continuity of the shape and avoids cracks.

This algorithm determines the piecewise extrusion directions as a vector between consecutive spine points. This means that zero or really small distances between consecutive points can produce odd extrusion directions and result in wrong geometry. It is up to the application to filter spine points to avoid these cases. The algorithm can produce odd geometries when spines points are overlapping or zigzags.

BASIC 

Old extrusion algorithm.

It does not guarantee that extrusion portions have constant section and shapes could be more twisted.

SMOOTH_WITHOUT_SELF_INTERSECTIONS 

Smooth but avoids self intersections caused by large curvature radius of the spine.

When the spine has curves with a large curvature radius compared to the radius of the extrusion section, SMOOTH generation might produce self intersections. Use this mode to avoid self intersections at the cost of some localized violation of the extrusion smoothness. (Section parts at spine joints may not be constant where self intersections were present.) This mode is useful to avoid artifacts in boolean results when SoBaseExtrusion derived objects are used as operands for CSG operations.

Definition at line 97 of file SoBaseExtrusion.h.

◆ ScaleMode

Enumerator
DEFAULT 

Default scaling.

Every point in the generated geometry is scaled.

SPINE_ONLY 

Only the spine points are scaled.

The cross section points are not scaled, so the cross section shape is undistorted even is scaling is non-uniform.

SECTION_ONLY 

Only the cross section points are scaled.

Not currently implemented.

NONE 

Ignores the scaling state.

Not currently implemented.

Definition at line 83 of file SoBaseExtrusion.h.

Member Function Documentation

◆ getClassTypeId()

static SoType SoBaseExtrusion::getClassTypeId ( )
static

Returns the type identifier for this class.


◆ getTypeId()

virtual SoType SoBaseExtrusion::getTypeId ( ) const
virtual

Returns the type identifier for this specific instance.

Reimplemented from SoShape.

Reimplemented in SoCircularExtrusion, and SoExtrusion.

Friends And Related Symbol Documentation

◆ inventor::impl::SoExtrusionImpl

friend class inventor::impl::SoExtrusionImpl
friend

Definition at line 193 of file SoBaseExtrusion.h.

Member Data Documentation

◆ beginCap

SoSFBool SoBaseExtrusion::beginCap

If TRUE, begin planar cap surfaces generated.

Default is TRUE.

Definition at line 132 of file SoBaseExtrusion.h.

◆ endCap

SoSFBool SoBaseExtrusion::endCap

If TRUE, end planar cap surfaces generated.

Default is TRUE.

Definition at line 137 of file SoBaseExtrusion.h.

◆ extrusionMode

SoSFEnum SoBaseExtrusion::extrusionMode

Construction behavior of the extrusion.

Use enum ExtrusionMode. Default is SMOOTH.

Definition at line 154 of file SoBaseExtrusion.h.

◆ scaleMode

SoSFEnum SoBaseExtrusion::scaleMode

Scaling behavior of the extrusion.

Use enum ScaleMode. Default is DEFAULT.

Definition at line 148 of file SoBaseExtrusion.h.

◆ spine

SoMFVec3f SoBaseExtrusion::spine

Spine points.

Default is [0 0 0, 0 1 0].

Definition at line 142 of file SoBaseExtrusion.h.


The documentation for this class was generated from the following file: