Interactively draws a polygon in normalized screen space. More...
#include <Inventor/drawers/SoPolygonScreenDrawer.h>
Public Member Functions | |
virtual SoType | getTypeId () const |
SoPolygonScreenDrawer () | |
virtual void | clear () |
Static Public Member Functions | |
static SoType | getClassTypeId () |
This class can be used to interactively draw a polygon on screen.
When the polygon 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 additional notes and code example.
Polygon specific notes:
[C++]
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.
point | [] |
color | 1 0 0 |
simplificationThreshold | 5 |
isClosed | TRUE |
SoEllipseScreenDrawer, SoLassoScreenDrawer, SoPolyLineScreenDrawer, SoRectangleScreenDrawer
CustomScreenDrawer, MedicalFreeHandCutting, CSGClippingGroup, EditingPicking
SoPolygonScreenDrawer::SoPolygonScreenDrawer | ( | ) |
Constructor.
virtual void SoPolygonScreenDrawer::clear | ( | ) | [inline, virtual] |
Convenience method to clear the points in the line.
Reimplemented from SoPolyLineScreenDrawer.
static SoType SoPolygonScreenDrawer::getClassTypeId | ( | ) | [static] |
Returns the type identifier for this class.
Reimplemented from SoPolyLineScreenDrawer.
virtual SoType SoPolygonScreenDrawer::getTypeId | ( | ) | const [virtual] |
Returns the type identifier for this specific instance.
Reimplemented from SoPolyLineScreenDrawer.