com.openinventor.inventor.drawers

Class SoScreenDrawer

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

All Implemented Interfaces:

SafeDisposable

Direct Known Subclasses:

SoPolyLineScreenDrawer

public class SoScreenDrawer
extends SoNode

Base class to draw a scene graph in screen space. This node displays the scene graph specified by the sceneGraph field in screen space normalized in the range ([-1, 1]x[-1, 1]x[-1, 1]) relative to the current viewport.

The specified scene graph is automatically rendered using an SoAnnotation node, an SoPickStyle node with style = UNPICKABLE, and an SoOrthographicCamera node.

Classes derived from SoScreenDrawer are normally used to implement dynamically drawing a 2D shape, for example a rectangle, in response to mouse events. Applications will typically use one of these derived classes, for example, SoEllipseScreenDrawer, SoRectangleScreenDrawer, SoPolygonScreenDrawer or SoLassoScreenDrawer.

Please see SoPolyLineScreenDrawer for important notes about these classes and a code example.

Applications may also implement their own custom screen drawer classes. The convenient onMouseDown(), onMouseMove(), ... methods can be implemented by sub-classes to customize behaviors for specific events, but the application can also reimplement the handleEvent() method to handle any event.

There should only be one SoScreenDrawer derived node in the sceneGraph (to avoid conflicts in mouse events).

NOTE: This node and its subclasses use screen coordinates ranging from -1 to 1. (Because this is the default view volume for an SoOrthographicCamera node.) Be careful because other classes in Open Inventor use normalized screen coordinates ranging from 0 to 1. In particular the SbViewportRegion normalize() method and the SbViewVolume methods that project from 3D to 2D and vice-versa.

See also:

SoEllipseScreenDrawerSoLassoScreenDrawerSoPolygonScreenDrawerSoPolyLineScreenDrawerSoRectangleScreenDrawer

Nested Class Summary

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

Inventor.ConstructorCommand

Field Summary

Fields

Modifier and Type	Field and Description
SoSFNode	sceneGraph Scene graph to render.

Fields inherited from class com.openinventor.inventor.Inventor

VERBOSE_LEVEL, ZeroHandle

Constructor Summary

Constructors

Constructor and Description
SoScreenDrawer() Constructor.

Method Summary

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

affectsState, callback, copy, copy, distribute, doAction, getAlternateRep, getBoundingBox, getByName, getMatrix, getPrimitiveCount, 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, getEXTERNPROTO, getName, getPROTO, isDisposable, isSynchronizable, setName, setSynchronizable

Methods inherited from class com.openinventor.inventor.Inventor

getAddress, getNativeResourceHandle, startInternalThreads, stopInternalThreads

Methods inherited from class java.lang.Object

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

Field Detail

sceneGraph

public final SoSFNode sceneGraph

Scene graph to render.

Constructor Detail

SoScreenDrawer

public SoScreenDrawer()

Constructor.