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The SoGLViewingMatrixElement class is used to store the current viewing matrix.The viewing matrix contains the inverse camera coordinate system matrix. The camera coordinate system is built from the field values in the current SoCamera (currently either SoPerspectiveCamera or SoOrthographicCamera) and any transformations prior to the camera in the scene graph. More...
#include <Inventor/elements/SoGLViewingMatrixElement.h>
Public Member Functions | |
virtual void | init (SoState *state) |
FIXME: write doc. | |
virtual void | push (SoState *state) |
virtual void | pop (SoState *state, const SoElement *prevTopElement) |
Static Public Member Functions | |
static void | initClass (void) |
static uint32_t | getNodeId (SoState *const state) |
static SbMatrix | getResetMatrix (SoState *state) |
Protected Member Functions | |
virtual | ~SoGLViewingMatrixElement () |
virtual void | setElt (const SbMatrix &matrix) |
The SoGLViewingMatrixElement class is used to store the current viewing matrix.
The viewing matrix contains the inverse camera coordinate system matrix. The camera coordinate system is built from the field values in the current SoCamera (currently either SoPerspectiveCamera or SoOrthographicCamera) and any transformations prior to the camera in the scene graph.
SoGLViewingMatrixElement::~SoGLViewingMatrixElement | ( | void | ) | [protected, virtual] |
The destructor.
void SoGLViewingMatrixElement::initClass | ( | void | ) | [static] |
This static method initializes static data for the SoViewingMatrixElement class.
Reimplemented from SoViewingMatrixElement.
uint32_t SoGLViewingMatrixElement::getNodeId | ( | SoState *const | state | ) | [static] |
Returns the node id of the current camera node. This is used by SoGLModelMatrixElement to detect a change in the viewing matrix inside an SoTransformSeparator node.
Returns the matrix that should be used by SoGLModelMatrixElement when the transformation should be reset during traversal (typically when encountering an SoResetTransform node). It is not sufficient to simply load the viewing matrix, since the transformations that were applied before the camera needs to be accounted for.
This function is an extension for Coin, and it is not available in the original SGI Open Inventor v2.1 API.
void SoGLViewingMatrixElement::setElt | ( | const SbMatrix & | matrix | ) | [protected, virtual] |
Sets the current viewing matrix.
Reimplemented from SoViewingMatrixElement.
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