sodepthbuffer(3)
NAME
SoDepthBuffer - The SoDepthBuffer class is a node used to control the
GL depth buffer.
SYNOPSIS
#include <SoDepthBuffer.h> Inherits SoNode. Public Types enum DepthWriteFunction { NEVER = SoDepthBufferElement::NEVER, ALWAYS = SoDepthBufferElement::ALWAYS, LESS = SoDepthBufferElement::LESS, LEQUAL = SoDepthBufferElement::LEQUAL, EQUAL = SoDepthBufferElement::EQUAL, GEQUAL = SoDepthBufferElement::GEQUAL, GREATER = SoDepthBufferElement::GREATER, NOTEQUAL = SoDepthBufferElement::NOTEQUAL } Public Member Functions virtual SoType getTypeId (void) const SoDepthBuffer (void) virtual void GLRender (SoGLRenderAction *action) Static Public Member Functions static SoType getClassTypeId (void) static void initClass (void) Public Attributes SoSFBool test SoSFBool write SoSFEnum function SoSFVec2f range Protected Member Functions virtual const SoFieldData * getFieldData (void) const virtual ~SoDepthBuffer () Static Protected Member Functions static const SoFieldData ** getFieldDataPtr (void)
Detailed Description
The SoDepthBuffer class is a node used to control the GL depth buffer.
With this node you can control properties related to the OpenGL depth
buffer in a variety of ways.
o you can enable and disable depth buffer testing during rendering,
- o you can enable and disable writing to the depth buffer during
- rendering,
- o you can set the function used for the depth buffer testing, and
- o you can set the value range used in the depth buffer.
- The value range setting is useful if you need to segment the 3D world
into different segments with different depth buffer resolutions to get a more optimal depth buffer resolution distribution than what a single, uniform depth buffer value range can give you. - Be aware that this class is an extension for Coin, and it is not
available in the original SGI Open Inventor v2.1 API. - Since:
- Coin 3.0
Member Enumeration Documentation
- enum SoDepthBuffer::DepthWriteFunction
- Enumeration for the various depth functions.
- Enumerator:
- NEVER Never passes.
- ALWAYS Always passes.
- LESS Passes if the incoming depth value is less than the stored depth
value.
- LEQUAL Passes if the incoming depth value is less than or equal to the
stored depth value.
- EQUAL Passes if the incoming depth value is equal to the stored depth
value.
- GEQUAL Passes if the incoming depth value is greater 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.
Constructor & Destructor Documentation
- SoDepthBuffer::SoDepthBuffer (void)
- Constructor.
- SoDepthBuffer::~SoDepthBuffer () [protected, virtual]
- Destructor.
Member Function Documentation
- SoType SoDepthBuffer::getClassTypeId (void) [static]
- This static method returns the SoType object associated with objects of this class.
- Reimplemented from SoNode.
- SoType SoDepthBuffer::getTypeId (void) const [virtual]
- Returns the type identification of an object derived from a class
inheriting SoBase. This is used for run-time type checking and 'downward' casting. - Usage example:
void foo(SoNode * node)
{if (node->getTypeId() == SoFile::getClassTypeId()) {SoFile * filenode = (SoFile *)node; // safe downward cast, knows the type}} - For application programmers wanting to extend the library with new
nodes, engines, nodekits, draggers or others: this method needs to be
overridden in all subclasses. This is typically done as part of setting up the full type system for extension classes, which is usually
accomplished by using the pre-defined macros available through for
instance Inventor/nodes/SoSubNode.h (SO_NODE_INIT_CLASS and
SO_NODE_CONSTRUCTOR for node classes), Inventor/engines/SoSubEngine.h (for engine classes) and so on. - For more information on writing Coin extensions, see the class
documentation of the toplevel superclasses for the various class
groups. - Implements SoBase.
- const SoFieldData ** SoDepthBuffer::getFieldDataPtr (void) [static,
- protected]
This API member is considered internal to the library, as it is not likely to be of interest to the application programmer. - Reimplemented from SoNode.
- const SoFieldData * SoDepthBuffer::getFieldData (void) const [protected,
- virtual]
Returns a pointer to the class-wide field data storage object for this instance. If no fields are present, returns NULL. - Reimplemented from SoFieldContainer.
- void SoDepthBuffer::initClass (void) [static]
- Sets up initialization for data common to all instances of this class, like submitting necessary information to the Coin type system.
- Reimplemented from SoNode.
- void SoDepthBuffer::GLRender (SoGLRenderAction * action) [virtual]
- Action method for the SoGLRenderAction.
- This is called during rendering traversals. Nodes influencing the
rendering state in any way or who wants to throw geometry primitives at OpenGL overrides this method. - Reimplemented from SoNode.
Member Data Documentation
- SoSFBool SoDepthBuffer::test
- Enable depth buffer testing. Defaults to TRUE.
- SoSFBool SoDepthBuffer::write
- Enable depth buffer writing. Defaults to TRUE.
- SoSFEnum SoDepthBuffer::function
- Which depth function to use. Defaults to LESS.
- SoSFVec2f SoDepthBuffer::range
- The value range for the depth buffer data. Defaults to [0.0-1.0]. The
range will be clamped to [0.0-1.0].
Author
- Generated automatically by Doxygen for Coin from the source code.