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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. More...
#include <Inventor/elements/SoGLPointSizeElement.h>
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 void | initClass (void) |
Protected Member Functions | |
virtual | ~SoGLPointSizeElement () |
virtual void | setElt (float size) |
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*GLWidget::getPointSizeLimits() method in the GUI "glue" interface library you are using (SoQt, SoXt, SoGtk, SoWin, ...).
SoGLPointSizeElement::~SoGLPointSizeElement | ( | void | ) | [protected, virtual] |
The destructor.
void SoGLPointSizeElement::initClass | ( | void | ) | [static] |
Initialize relevant common data for all instances, like the type system.
Reimplemented from SoPointSizeElement.
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.
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