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SoPickAction - The SoPickAction class is the base class for picking actions. The basis for all interaction features that Coin provides for the application programmer is the pick actions. Draggers, manipulators, SoSelection nodes, etc all make use of the functionality provided by the pick actions for selecting and manipulating scene geometry in various ways.
#include <Inventor/actions/SoPickAction.h> Inherits SoAction. Inherited by SoRayPickAction. Public Member Functions void setViewportRegion (const SbViewportRegion &newregion) const SbViewportRegion & getViewportRegion (void) void enableCulling (const SbBool flag) SbBool isCullingEnabled (void) const Static Public Member Functions static void initClass (void) Protected Member Functions SoPickAction (const SbViewportRegion &viewportregion) virtual ~SoPickAction (void) virtual void beginTraversal (SoNode *node) Protected Attributes SbViewportRegion vpRegion
The SoPickAction class is the base class for picking actions. The basis for all interaction features that Coin provides for the application programmer is the pick actions. Draggers, manipulators, SoSelection nodes, etc all make use of the functionality provided by the pick actions for selecting and manipulating scene geometry in various ways. This class is not supposed to be used directly by the application programmer, as it is more a place-holder for the common interface of picking operations. It does not contain any actual code for doing scenegraph picks. Coin provides a fully functional picking action for the application programmer to use through the SoRayPickAction class (which inherits the SoPickAction class). See also: SoSelection
Constructor & Destructor Documentation
SoPickAction::SoPickAction (const SbViewportRegion &viewportregion) [protected] Constructor. SoPickAction::~SoPickAction (void) [protected, virtual] Destructor.
Member Function Documentation
void SoPickAction::initClass (void) [static] Initializes the run-time type system for this class, and sets up the enabled elements and action method list. Reimplemented from SoAction. Reimplemented in SoRayPickAction. void SoPickAction::setViewportRegion (const SbViewportRegion &newregion) Set a new viewport region to replace the one passed in with the constructor. const SbViewportRegion & SoPickAction::getViewportRegion (void) Returns the viewport region used by the action. void SoPickAction::enableCulling (const SbBoolflag) Don't calculate bounding boxes and try to do culling when picking. This can provide a speed-up in cases where the default setting of on would be inefficient. SbBool SoPickAction::isCullingEnabled (void) const Returns the current state of the culling flag. void SoPickAction::beginTraversal (SoNode *node) [protected, virtual] This virtual method is called from SoAction::apply(), and is the entry point for the actual scenegraph traversal. It can be overridden to initialize the action at traversal start, for specific initializations in the action subclasses inheriting SoAction. Default method just calls traverse(), which any overridden implementation of the method must do too (or call SoAction::beginTraversal()) to trigger the scenegraph traversal. Reimplemented from SoAction. Reimplemented in SoRayPickAction.
Member Data Documentation
SbViewportRegion SoPickAction::vpRegion [protected] The viewport region used by pick actions.
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