com.openinventor.inventor.drawers

Class SoEllipseScreenDrawer

java.lang.Object

com.openinventor.inventor.Inventor

com.openinventor.inventor.misc.SoBase

com.openinventor.inventor.fields.SoFieldContainer

com.openinventor.inventor.nodes.SoNode

com.openinventor.inventor.drawers.SoScreenDrawer

com.openinventor.inventor.drawers.SoPolyLineScreenDrawer

com.openinventor.inventor.drawers.SoEllipseScreenDrawer

All Implemented Interfaces:

SafeDisposable

public class SoEllipseScreenDrawer
extends SoPolyLineScreenDrawer

Interactively draw an ellipse in normalized screen space. 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:

• The ellipse can be specified by the 2 corners of its bounding box (default) or by its center and one corner of its bounding box (see CreationMethod).
• The simplificationThreshold field does not apply to this node. The number of points in the ellipse is specified using the nbPoint field.
• The isClosed field does apply to this node (but false is not very useful).
• If user finishes an ellipse, then the next click will automatically clear the polyline (begin a new ellipse).
• SbEventHandlers:
  • OnStart : Triggered on LeftMouseDown input event.
  • OnMove : Triggered on MouseMove input events (after Start).
  • OnFinish : Triggered on LeftMouseUp input event.

USAGE

• Press and drag left mouse to draw the ellipse.
• Release to finish the ellipse.
• Press Escape to cancel construction of the ellipse.

File format/default:

EllipseScreenDrawer {

point	[]
color	1 0 0
simplificationThreshold	0
isClosed	true
method	CORNER_CORNER
nbPoint	16

}

See also:

SoLassoScreenDrawer, SoPolyLineScreenDrawer, SoPolygonScreenDrawer, SoRectangleScreenDrawer,

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	SoEllipseScreenDrawer.CreationMethods Methods to create ellipse.

Nested classes/interfaces inherited from class com.openinventor.inventor.drawers.SoPolyLineScreenDrawer

SoPolyLineScreenDrawer.EventArg

Nested classes/interfaces inherited from class com.openinventor.inventor.nodes.SoNode

SoNode.RenderModes

Nested classes/interfaces inherited from class com.openinventor.inventor.Inventor

Inventor.ConstructorCommand

Field Summary

Fields

Modifier and Type	Field and Description
SoSFEnum<SoEllipseScreenDrawer.CreationMethods>	method Method to create ellipse.
SoSFUInt32	nbPoint Number of points in generated ellipse.

Fields inherited from class com.openinventor.inventor.drawers.SoPolyLineScreenDrawer

color, doCCW, isClosed, linePattern, linePatternScaleFactor, lineWidth, onFinish, onMove, onStart, point, simplificationThreshold

Fields inherited from class com.openinventor.inventor.drawers.SoScreenDrawer

sceneGraph

Fields inherited from class com.openinventor.inventor.Inventor

VERBOSE_LEVEL, ZeroHandle

Constructor Summary

Constructors

Constructor and Description
SoEllipseScreenDrawer() Constructor.

Method Summary

Methods inherited from class com.openinventor.inventor.drawers.SoPolyLineScreenDrawer

clear

Methods inherited from class com.openinventor.inventor.nodes.SoNode

affectsState, callback, copy, copy, distribute, doAction, getAlternateRep, getBoundingBox, getByName, getMatrix, getPrimitiveCount, getRenderEngineMode, getRenderUnitID, GLRender, GLRenderBelowPath, GLRenderInPath, GLRenderOffPath, grabEventsCleanup, grabEventsSetup, handleEvent, isBoundingBoxIgnoring, isOverride, pick, rayPick, search, setOverride, touch, write

Methods inherited from class com.openinventor.inventor.fields.SoFieldContainer

copyFieldValues, copyFieldValues, enableNotify, fieldsAreEqual, get, getAllFields, getEventIn, getEventOut, getField, getFieldName, hasDefaultValues, isNotifyEnabled, set, setToDefaults

Methods inherited from class com.openinventor.inventor.misc.SoBase

dispose, getName, isDisposable, isSynchronizable, setName, setSynchronizable

Methods inherited from class com.openinventor.inventor.Inventor

getNativeResourceHandle

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

method

public final SoSFEnum<SoEllipseScreenDrawer.CreationMethods> method

Method to create ellipse. . Default is CORNER_CORNER.

nbPoint

public final SoSFUInt32 nbPoint

Number of points in generated ellipse. Default is 16. Must be > 0.

Constructor Detail

SoEllipseScreenDrawer

public SoEllipseScreenDrawer()

Constructor.