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SoGLColorIndexElement Class Reference
[Elements (mostly for internal use)]

The SoGLColorIndexElement class sets the current OpenGL color. More...

#include <Inventor/elements/SoGLColorIndexElement.h>

Inheritance diagram for SoGLColorIndexElement:

SoReplacedElement SoElement List of all members.

Public Member Functions

virtual void init (SoState *state)
virtual void push (SoState *state)
int32_t getNum (void) const
void send (const int index)

Static Public Member Functions

void initClass (void)
SbBool isColorIndexMode (SoState *state)
void set (SoState *const state, SoNode *const node, const int32_t numindices, const int32_t *const indices)
const SoGLColorIndexElementgetInstance (SoState *state)

Protected Member Functions

virtual ~SoGLColorIndexElement ()

Detailed Description

The SoGLColorIndexElement class sets the current OpenGL color.

This element is only used when the OpenGL canvas is in colorindex mode, ie where colors for individual pixels are fetched from a color lookup table ("CLUT"). The usual thing to do is to set up a canvas in RGBA truecolor mode.

One common use for colorindex mode OpenGL canvases is to use one in the overlay planes (which are usually limited to only 2 or 4 available colors), if supported by the OpenGL hardware and / or driver.

See also:
SoColorIndex


Constructor & Destructor Documentation

SoGLColorIndexElement::~SoGLColorIndexElement  )  [protected, virtual]
 

The destructor.


Member Function Documentation

void SoGLColorIndexElement::initClass void   )  [static]
 

Initialize relevant common data for all instances, like the type system.

Reimplemented from SoReplacedElement.

SbBool SoGLColorIndexElement::isColorIndexMode SoState state  )  [static]
 

Returns TRUE if the current GL context is in color index mode.

void SoGLColorIndexElement::init SoState state  )  [virtual]
 

This function initializes the element type in the given SoState. It is called for the first element of each enabled element type in SoState objects.

Reimplemented from SoReplacedElement.

void SoGLColorIndexElement::push SoState state  )  [virtual]
 

This method is called every time a new element is required in one of the stacks. This happens when a writable element is requested, using SoState::getElement() or indirectly SoElement::getElement(), and the depth of the current element is less than the state depth.

Override this method if your element needs to copy data from the previous top of stack. The push() method is called on the new element, and the previous element can be found using SoElement::getNextInStack().

Reimplemented from SoElement.

void SoGLColorIndexElement::set SoState *const  state,
SoNode *const  node,
const int32_t  numindices,
const int32_t *const  indices
[static]
 

Sets current color indices.

const SoGLColorIndexElement * SoGLColorIndexElement::getInstance SoState state  )  [static]
 

Returns the current element.

int32_t SoGLColorIndexElement::getNum void   )  const
 

Returns number of color indices in element.

void SoGLColorIndexElement::send const int  index  ) 
 

Sends color index index to OpenGL.


The documentation for this class was generated from the following files:
Generated on Tue Jul 27 23:53:05 2004 for Coin by doxygen 1.3.7