Open Inventor Release 2023.2.3
 
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SoDepthBuffer Class Reference

VSG extension Depth buffer parameters node. More...

#include <Inventor/nodes/SoDepthBuffer.h>

+ Inheritance diagram for SoDepthBuffer:

Public Types

enum  DepthWriteFunction {
  NEVER = SoDepthBufferElement::NEVER ,
  LESS = SoDepthBufferElement::LESS ,
  EQUAL = SoDepthBufferElement::EQUAL ,
  LEQUAL = SoDepthBufferElement::LEQUAL ,
  GREATER = SoDepthBufferElement::GREATER ,
  NOTEQUAL = SoDepthBufferElement::NOTEQUAL ,
  GEQUAL = SoDepthBufferElement::GEQUAL ,
  ALWAYS = SoDepthBufferElement::ALWAYS
}
 Depth function mode as defined by OpenGL. More...
 

Public Member Functions

virtual SoType getTypeId () const
 Returns the type identifier for this specific instance.
 
 SoDepthBuffer ()
 Constructor.
 
virtual void setOverride (const SbBool state)
 Turns the override flag on or off.
 
virtual SbBool isOverride () const
 Returns the state of the override flag.
 
- Public Member Functions inherited from SoNode
virtual SoNodecopy (SbBool copyConnections=FALSE) const
 Creates and returns an exact copy of the node.
 
virtual SbBool affectsState () const
 Returns TRUE if a node has an effect on the state during traversal.
 
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 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 test
 Enable depth buffer testing (glEnable).
 
SoSFBool write
 Enable depth buffer writing (glDepthMask).
 
SoSFEnum function
 Depth comparison function to use (glDepthFunc).
 
SoSFVec2f range
 Value range for the depth buffer (glDepthRange).
 
SoSFBool clearBuffer
 If true, the depth buffer is cleared when the node is traversed.
 

Detailed Description

VSG extension Depth buffer parameters node.

This class specifies the depth buffer parameters used for rendering, including:

  • Depth buffer test enabled,
  • Depth buffer writing enabled,
  • Depth buffer range, and
  • Depth comparison function.

It can also be used to clear the depth buffer by setting the clearBuffer field to true.

To control whether frame buffer color components are written or not, see SoColorMask.

Limitations:

  • Transparency:
    The "depth peeling" transparency types (SORTED_PIXEL) do not work correctly if this node is used to change depth buffer settings.
  • Test function
    By default SoDepthBuffer sets the OpenGL depth buffer test function to LESS. (Meaning that only fragments with a depth value strictly less than the current depth buffer value will be rendered.) This is NOT the same as the Open Inventor default.

    By default Open Inventor sets the depth buffer test function to LEQUAL and this value is recommended for most applications. Some Open Inventor features, for example SoGradientBackground, will not work correctly with the depth buffer test function set to LESS.

FILE FORMAT/DEFAULT

    DepthBuffer {
    test TRUE
    write TRUE
    function LESS
    range (0.0,1.0)
    clearBuffer FALSE
    }

ACTION BEHAVIOR

SEE ALSO

SoPolygonOffset, SoDepthOffset, SoColorMask, SoGLRenderAction

Definition at line 91 of file SoDepthBuffer.h.

Member Enumeration Documentation

◆ DepthWriteFunction

Depth function mode as defined by OpenGL.

Enumerator
NEVER 

Never passes.

LESS 

Passes if the incoming depth value is less than the stored depth value.

EQUAL 

Passes if the incoming depth value is equal to the stored depth value.

LEQUAL 

Passes if the incoming depth value is less than or equal to the stored depth value.

GREATER 

Passes if the incoming depth value is greater than the stored depth value.

NOTEQUAL 

Passes if the incoming depth value is not equal to the stored depth value.

GEQUAL 

Passes if the incoming depth value is greater than or equal to the stored depth value.

ALWAYS 

Always passes.

Definition at line 100 of file SoDepthBuffer.h.

Constructor & Destructor Documentation

◆ SoDepthBuffer()

SoDepthBuffer::SoDepthBuffer ( )

Constructor.

Member Function Documentation

◆ getClassTypeId()

static SoType SoDepthBuffer::getClassTypeId ( )
static

Returns the type identifier for this class.


◆ getTypeId()

virtual SoType SoDepthBuffer::getTypeId ( ) const
virtual

Returns the type identifier for this specific instance.

Reimplemented from SoNode.

◆ isOverride()

virtual SbBool SoDepthBuffer::isOverride ( ) const
inlinevirtual

Returns the state of the override flag.

Reimplemented from SoNode.

Definition at line 170 of file SoDepthBuffer.h.

◆ setOverride()

virtual void SoDepthBuffer::setOverride ( const SbBool  state)
inlinevirtual

Turns the override flag on or off.



The following property nodes are affected by the override flag: SoBaseColor, SoColorIndex, SoComplexity, SoDepthBuffer, SoDrawStyle, SoEnvironment, SoFont, SoFullSceneAntialiasing, SoLightModel, SoMaterial, SoMaterialBinding, SoPackedColor, SoPattern, SoPickStyle, SoPolygonOffset, SoShapeHints, SoVertexProperty, SoTextProperty.

Every node has an override flag associated with it. The override flag is a powerful mechanism typically used (sparingly) near the top of a scene graph. When this flag is set, any nodes of the same type encountered later in the graph are ignored even if they also have their own override flag set. For example, you might insert a line-style SoDrawStyle node at the top of a graph to ensure that the whole scene is drawn as wireframe objects, regardless of drawing styles specified lower in the scene graph. Use the setOverride() method to set and reset the override flag. The isOverride() method returns the state of the override flag.

Normally, the override flag is not used within a scene graph for modeling. Use it in applications where you need to specify a temporary change to the whole graph.

Note: The override flag is not written to a file.

Setting the override flag on a node whose field values are not inherited (for example on a sphere with a radius of 7) has no effect on other nodes in the graph of that type.

Reimplemented from SoNode.

Definition at line 164 of file SoDepthBuffer.h.

Member Data Documentation

◆ clearBuffer

SoSFBool SoDepthBuffer::clearBuffer

If true, the depth buffer is cleared when the node is traversed.

The extent of the buffer that is actually cleared may be limited using an SoViewportClipping node. Default is FALSE.

Note: Be careful when using this feature along with a transparency mode other than SoGLRenderAction::NO_SORT because the objects rendering order might be different from their ordering in the scene graph.

NOTE: field available since Open Inventor 8.6

Definition at line 156 of file SoDepthBuffer.h.

◆ function

SoSFEnum SoDepthBuffer::function

Depth comparison function to use (glDepthFunc).

Use enum DepthWriteFunction. Default is LESS.

Definition at line 137 of file SoDepthBuffer.h.

◆ range

SoSFVec2f SoDepthBuffer::range

Value range for the depth buffer (glDepthRange).

Default is [0.0-1.0]. The range will be clamped to [0.0-1.0] by OpenGL.

Definition at line 143 of file SoDepthBuffer.h.

◆ test

SoSFBool SoDepthBuffer::test

Enable depth buffer testing (glEnable).

Default is TRUE.

Note that disabling depth testing will prevent the depth buffer from being updated even if depth buffer writing is set to TRUE.

Definition at line 126 of file SoDepthBuffer.h.

◆ write

SoSFBool SoDepthBuffer::write

Enable depth buffer writing (glDepthMask).

Default is TRUE.

Definition at line 131 of file SoDepthBuffer.h.


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