SoLightElement(3)

NAME
SoLightElement - The SoLightElement class manages the currently active light sources.

SYNOPSIS

#include <Inventor/elements/SoLightElement.h>

Inherits SoAccumulatedElement.

  Public Member Functions
virtual void init (SoState *state)
virtual void push (SoState *state)

  Static Public Member Functions
static SoType getClassTypeId (void)
static int getClassStackIndex (void)
static void * createInstance (void)
static void initClass (void)
static void add (SoState *const state, SoLight *const light, const SbMatrix &matrix)
static const SoNodeList & getLights (SoState *const state)
static const SbMatrix & getMatrix (SoState *const state, const int index)

  Protected Member Functions
SoLightElement (void)
virtual ~SoLightElement ()

  Protected Attributes
SoNodeList lights
SbList< SbMatrix > * matrixlist

  Additional Inherited Members

Detailed Description

The SoLightElement class manages the currently active light sources.

Constructor & Destructor Documentation

  SoLightElement::SoLightElement (void) [protected]
Constructor.

  SoLightElement::~SoLightElement (void) [protected], [virtual]
Destructor.

Member Function Documentation

  SoType SoLightElement::getClassTypeId (void) [static]
This static method returns the SoType object associated with objects of this class.

  int SoLightElement::getClassStackIndex (void) [static]
This static method returns the state stack index for the class.

  void * SoLightElement::createInstance (void) [static]
This API member is considered internal to the library, as it is not likely to be of interest to the application programmer.
 Creates a new instance of the class type corresponding to the SoType object.

  void SoLightElement::initClass (void) [static]
Initialize relevant common data for all instances, like the type system.

  void SoLightElement::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 SoAccumulatedElement.

  void SoLightElement::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 SoAccumulatedElement.

  void SoLightElement::add (SoState *const state, SoLight *const light, const SbMatrix & matrix) [static]
Adds light to the list of active lights. matrix should transform the light from the world coordinate system to the view reference coordinate system.

  const SoNodeList & SoLightElement::getLights (SoState *const state) [static]
Returns the list of light nodes.

  const SbMatrix & SoLightElement::getMatrix (SoState *const state, const int index) [static]
Get matrix which transforms light index from the world coordinate system to the view reference system.

Member Data Documentation

  SoLightElement::lights [protected]
List of current light nodes.

  SoLightElement::matrixlist [protected]
List of matrices to map from world coordinates to view reference coordinates. To avoid getting a hugs element (sizeof), this list is only allocated in the bottom element, and the pointer to this list is passed along to the other elements.

Author

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