Element that stores the rectangular area within the current viewport region that needs to be updated when rendering. More...
#include <Inventor/elements/SoGLUpdateAreaElement.h>
Public Member Functions | |
| virtual void | init (SoState *state) |
| Initializes element. | |
| virtual void | push (SoState *state) |
| Override push() and pop() methods to keep GL up to date. | |
| virtual void | pop (SoState *state, const SoElement *prevTopElement) |
| virtual SbBool | matches (const SoElement *elt) const |
| Returns TRUE if the update areas match in both elements. | |
| virtual SoElement * | copyMatchInfo () const |
| Create and return a copy of this element. | |
| virtual void | print (FILE *fp) const |
| Prints element (for debugging) | |
Static Public Member Functions | |
| static void | set (SoState *state, const SbVec2f &origin, const SbVec2f &size) |
| Sets the current update area in the state. May have GL side effects. | |
| static SbBool | get (SoState *state, SbVec2f &origin, SbVec2f &size) |
| Returns current update area from the state. | |
| static SbVec2f | getDefaultOrigin () |
| Returns the default update area origin and size. | |
| static SbVec2f | getDefaultSize () |
| static void | initClass () |
| Initializes the SoGLUpdateAreaElement class. | |
Protected Member Functions | |
| virtual | ~SoGLUpdateAreaElement () |
Protected Attributes | |
| SbVec2f | origin |
| SbVec2f | size |
Detailed Description
It can be used for partial rendering updates when applications know that only a portion of the objects need to be rerendered. Cameras can use the info in this element to set up a view volume against which culling can be performed. This element also sets up the GL scissor box to limit drawing.
The update area is specified in normalized viewport coordinates, where (0,0) is the lower left corner of the viewport and (1,1) is the upper right corner. The area is given as an origin and a size.
Definition at line 80 of file SoGLUpdateAreaElement.h.
Constructor & Destructor Documentation
| virtual SoGLUpdateAreaElement::~SoGLUpdateAreaElement | ( | ) | [protected, virtual] |
Member Function Documentation
| static SbBool SoGLUpdateAreaElement::get | ( | SoState * | state, |
| SbVec2f & | origin, | ||
| SbVec2f & | size | ||
| ) | [static] |
Returns TRUE if the update area is the default, namely, the entire viewport.
| static SbVec2f SoGLUpdateAreaElement::getDefaultOrigin | ( | ) | [inline, static] |
Definition at line 97 of file SoGLUpdateAreaElement.h.
| static SbVec2f SoGLUpdateAreaElement::getDefaultSize | ( | ) | [inline, static] |
Definition at line 98 of file SoGLUpdateAreaElement.h.
| static void SoGLUpdateAreaElement::initClass | ( | ) | [static] |
Reimplemented from SoElement.
Implements SoElement.
| virtual void SoGLUpdateAreaElement::pop | ( | SoState * | state, |
| const SoElement * | prevTopElement | ||
| ) | [virtual] |
Reimplemented from SoElement.
| virtual void SoGLUpdateAreaElement::print | ( | FILE * | fp | ) | const [virtual] |
Reimplemented from SoElement.
| static void SoGLUpdateAreaElement::set | ( | SoState * | state, |
| const SbVec2f & | origin, | ||
| const SbVec2f & | size | ||
| ) | [static] |
Member Data Documentation
SbVec2f SoGLUpdateAreaElement::origin [protected] |
Definition at line 118 of file SoGLUpdateAreaElement.h.
SbVec2f SoGLUpdateAreaElement::size [protected] |
Definition at line 118 of file SoGLUpdateAreaElement.h.
The documentation for this class was generated from the following file:
- MeVis/ThirdParty/Sources/Inventor/inventor/lib/database/include/Inventor/elements/SoGLUpdateAreaElement.h
