soglpointsizeelement(3)
NAME
SoGLPointSizeElement
SYNOPSIS
#include <Inventor/elements/SoGLPointSizeElement.h> Inherits SoPointSizeElement.
Detailed Description
The SoGLPointSizeElement class changes the pointsize setting of the
OpenGL render state.
Requests from the scenegraph to change the pointsize when rendering
point primitives will be made through this element, which forwards it
to the appropriate native OpenGL call.
- The Coin library does not place any bounds on the values of the
pointsize, but be aware that the range and granularity of what is valid pointsizes depends on the underlying OpenGL implementation. Application programmers using point primitives (typically through the SoPointSet node) should heed these boundary values. They can be acquired by
running the following code from within a valid OpenGL context: - GLfloat bounds[2];
glGetFloatv(GL_POINT_SIZE_RANGE, bounds);
GLfloat granularity[1];
glGetFloatv(GL_POINT_SIZE_GRANULARITY, granularity); - Another, perhaps more convenient, way of acquiring the OpenGL
implementation limits with regard to pointsizes is to use the
So*GLWidgetgetPointSizeLimits() method in the GUI 'glue' interface
library you are using (SoQt, SoXt, SoGtk, SoWin, ...). - Public Member Functions
- virtual void init (SoState *state)
virtual void push (SoState *state)
virtual void pop (SoState *state, const SoElement *prevTopElement) - Static Public Member Functions
- static SoType getClassTypeId (void)
static int getClassStackIndex (void)
static void * createInstance (void)
static void initClass (void) - Protected Member Functions
- virtual ~SoGLPointSizeElement () virtual void setElt (float size)
Constructor & Destructor Documentation
- SoGLPointSizeElement::~SoGLPointSizeElement (void) [protected, virtual]
- The destructor.
Member Function Documentation
- SoType SoGLPointSizeElement::getClassTypeId (void) [static]
- This static method returns the class type.
- Reimplemented from SoPointSizeElement.
- int SoGLPointSizeElement::getClassStackIndex (void) [static]
- This static method returns the state stack index for the class.
- Reimplemented from SoPointSizeElement.
- void * SoGLPointSizeElement::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.
- Reimplemented from SoPointSizeElement.
- void SoGLPointSizeElement::initClass (void) [static]
- Initialize relevant common data for all instances, like the type
system. - Reimplemented from SoPointSizeElement.
- Referenced by SoElement::initElements().
- void SoGLPointSizeElement::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 SoPointSizeElement.
- References SoPointSizeElement::init().
- void SoGLPointSizeElement::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.
- References SoElement::capture(), SoFloatElement::data, and
SoElement::getNextInStack(). - void SoGLPointSizeElement::pop (SoState * state, const SoElement *
- prevTopElement) [virtual]
This method is callled when the state is popped, and the depth of the
element is bigger than the current state depth. pop() is called on the new top of stack, and a pointer to the previous top of stack is passed in prevTopElement. - Override this method if you need to copy some state information from
the previous top of stack. - Reimplemented from SoElement.
- References SoFloatElement::data.
- void SoGLPointSizeElement::setElt (float val) [protected, virtual]
- This API member is considered internal to the library, as it is not likely to be of interest to the application programmer.
- Reimplemented from SoFloatElement.
- References SoFloatElement::data.
Author
- Generated automatically by Doxygen for Coin from the source code.