Interactively draw an ellipse in normalized screen space. More...
#include <Inventor/drawers/SoEllipseScreenDrawer.h>
Public Types | |
enum | CreationMethod { CORNER_CORNER, CENTER_CORNER } |
Public Member Functions | |
virtual SoType | getTypeId () const |
SoEllipseScreenDrawer () | |
Static Public Member Functions | |
static SoType | getClassTypeId () |
Public Attributes | |
SoSFEnum | method |
SoSFUInt32 | nbPoint |
This class can be used to interactively draw an ellipse on screen.
When the ellipse 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 is specified by the color field in the parent class SoPolyLineScreenDrawer.
Please see SoPolyLineScreenDrawer for general notes and code example.
Ellipse 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 | 0 |
isClosed | TRUE |
method | CORNER_CORNER |
nbPoint | 16 |
SoLassoScreenDrawer, SoPolyLineScreenDrawer, SoPolygonScreenDrawer, SoRectangleScreenDrawer,
CustomScreenDrawer, MedicalFreeHandCutting, CSGClippingGroup
SoEllipseScreenDrawer::SoEllipseScreenDrawer | ( | ) |
Constructor.
static SoType SoEllipseScreenDrawer::getClassTypeId | ( | ) | [static] |
Returns the type identifier for this class.
Reimplemented from SoPolyLineScreenDrawer.
virtual SoType SoEllipseScreenDrawer::getTypeId | ( | ) | const [virtual] |
Returns the type identifier for this specific instance.
Reimplemented from SoPolyLineScreenDrawer.
Method to create ellipse.
Use enum CreationMethod. Default is CORNER_CORNER.
Number of points in generated ellipse.
Default is 16. Must be > 0.