SoLassoScreenDrawer Class Reference

VSG extension Interactively draw a lasso in normalized screen space. More...

#include <Inventor/drawers/SoLassoScreenDrawer.h>

Inheritance diagram for SoLassoScreenDrawer:
SoPolyLineScreenDrawer SoScreenDrawer SoNode SoFieldContainer SoBase SoRefCounter SoTypedObject

List of all members.

Public Member Functions

virtual SoType getTypeId () const
 SoLassoScreenDrawer ()
virtual void reset ()

Static Public Member Functions

static SoType getClassTypeId ()

Detailed Description

VSG extension Interactively draw a lasso in normalized screen space.

This class can be used to interactively draw a lasso (freeform shape) on screen.

When the lasso is finished, an event is raised to notify the application (see SoPolyLineScreenDrawer::onFinish ). Points are returned as normalized coordinates in the range -1..1, which is conveniently the default view volume for an SoOrthographicCamera node.

The line color and simplification threshold are specified by fields in the parent class SoPolyLineScreenDrawer.

Please see SoPolyLineScreenDrawer for general notes and code example.

Lasso specific notes:

Screen drawer classes must be initialized by calling SoInteraction::init(). High level viewer init methods, like SoWin::init(), automatically do this. However, if the application is calling SoDB::init() directly, then it is usually necessary to also call SoInteraction::init() before using the screen drawer classes.




SoEllipseScreenDrawer, SoPolyLineScreenDrawer, SoPolygonScreenDrawer, SoRectangleScreenDrawer

See related examples:

CustomScreenDrawer, MedicalFreeHandCutting, CSGClippingGroup, EditingExtrusion, Editing

Constructor & Destructor Documentation

SoLassoScreenDrawer::SoLassoScreenDrawer (  ) 


Member Function Documentation

static SoType SoLassoScreenDrawer::getClassTypeId (  )  [static]

Returns the type identifier for this class.

Reimplemented from SoPolyLineScreenDrawer.

virtual SoType SoLassoScreenDrawer::getTypeId (  )  const [virtual]

Returns the type identifier for this specific instance.

Reimplemented from SoPolyLineScreenDrawer.

virtual void SoLassoScreenDrawer::reset (  )  [virtual]

Clears the points in the line and resets internal state to initial values. This cancels any current drawing. Since Open Inventor 10.7.3

Reimplemented from SoPolyLineScreenDrawer.

The documentation for this class was generated from the following file:

Open Inventor Toolkit reference manual, generated on 12 Sep 2022
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