NAME
SoPickStyle -
The SoPickStyle class is a node for setting up how to do picking.
By default, all geometry in a scene is available for picking. Upon
writing applications with interaction possibilities, this is often not
what you want. To exclude parts of the scene graph from pick actions,
use the SoPickStyle::UNPICKABLE.
SYNOPSIS
#include <Inventor/nodes/SoPickStyle.h>
Inherits SoNode.
Public Types
enum Style { SHAPE = SoPickStyleElement::SHAPE, BOUNDING_BOX =
SoPickStyleElement::BOUNDING_BOX, UNPICKABLE =
SoPickStyleElement::UNPICKABLE, SHAPE_ON_TOP =
SoPickStyleElement::SHAPE_ON_TOP, BOUNDING_BOX_ON_TOP =
SoPickStyleElement::BOUNDING_BOX_ON_TOP, SHAPE_FRONTFACES =
SoPickStyleElement::SHAPE_FRONTFACES }
Public Member Functions
SoPickStyle (void)
virtual void doAction (SoAction *action)
virtual void callback (SoCallbackAction *action)
virtual void pick (SoPickAction *action)
Static Public Member Functions
static void initClass (void)
Public Attributes
SoSFEnum style
Protected Member Functions
virtual ~SoPickStyle ()
Detailed Description
The SoPickStyle class is a node for setting up how to do picking.
By default, all geometry in a scene is available for picking. Upon
writing applications with interaction possibilities, this is often not
what you want. To exclude parts of the scene graph from pick actions,
use the SoPickStyle::UNPICKABLE.
You can also optimize pick operations by using the
SoPickStyle::BOUNDING_BOX pickstyle.
FILE FORMAT/DEFAULTS:
PickStyle {
style SHAPE
}
See also:
SoRayPickAction
Member Enumeration Documentation
enum SoPickStyle::Style Enumeration of the available picking strategies.
Enumerator:
SHAPE Do ’exact’ picks, finding the correct intersection point(s),
etc.
BOUNDING_BOX
Only compare pick intersection with the bounding boxes of
shapes. This is usually much faster than SoPickStyle::SHAPE.
UNPICKABLE
The geometry following this node in the scene will not be
available for picking.
SHAPE_ON_TOP
Do exact picks, like SHAPE, but sort the shape to the front of
the list of picked points so it appears to be the frontmost
item. This does not affect the SoPickedPoint pick coordinate
though, just the sorting by depth done on the picked point list.
Since:
Coin 3.0
BOUNDING_BOX_ON_TOP
Do picks against the enclosing bounding box of the object, like
BOUNDING_BOX, but sort the shape to the front of the list of
picked points so it appears to be the frontmost item. This does
not affect the SoPickedPoint pick coordinate though, just the
sorting by depth done on the picked point list.
Since:
Coin 3.0
SHAPE_FRONTFACES
Do exact picks, like SHAPE, but cull all the backface
intersections from the list. Note that this logic is relative to
the ray, not the view, in case the ray and the view direction
are not aligned.
The behaviour of this setting will also depend on the SoShapeStyle
vertexOrdering and shapeType setting, which are used to flip frontfaces
to become backfaces and vice versa and to turn backface culling on and
off.
Since:
Coin 3.0
Constructor & Destructor Documentation
SoPickStyle::SoPickStyle (void) Constructor.
SoPickStyle::~SoPickStyle () [protected, virtual] Destructor.
Member Function Documentation
void SoPickStyle::initClass (void) [static] Sets up initialization for data
common to all instances of this class, like submitting necessary
information to the Coin type system.
Reimplemented from SoNode.
void SoPickStyle::doAction (SoAction * action) [virtual] This function
performs the typical operation of a node for any action.
Reimplemented from SoNode.
void SoPickStyle::callback (SoCallbackAction * action) [virtual] Action
method for SoCallbackAction.
Simply updates the state according to how the node behaves for the
render action, so the application programmer can use the
SoCallbackAction for extracting information about the scene graph.
Reimplemented from SoNode.
void SoPickStyle::pick (SoPickAction * action) [virtual] Action method for
SoPickAction.
Does common processing for SoPickAction action instances.
Reimplemented from SoNode.
Member Data Documentation
SoSFEnum SoPickStyle::style Which strategy to use for the picking actions
for subsequent shapes in the scene graph. Default value is
SoPickStyle::SHAPE.
Author
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