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The SoDepthBuffer class is a node used to control the GL depth buffer. More...
#include <SoDepthBuffer.h>
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) |
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.
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.
Enumeration for the various depth functions.
SoDepthBuffer::SoDepthBuffer | ( | void | ) |
Constructor.
SoDepthBuffer::~SoDepthBuffer | ( | ) | [protected, virtual] |
Destructor.
SoType SoDepthBuffer::getClassTypeId | ( | void | ) | [static] |
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.
Enable depth buffer testing. Defaults to TRUE.
Enable depth buffer writing. Defaults to TRUE.
Which depth function to use. Defaults to LESS.
The value range for the depth buffer data. Defaults to [0.0-1.0]. The range will be clamped to [0.0-1.0].
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