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SoScreenDrawer Class

Base class to draw a scene graph in screen space.

Inheritance Hierarchy

Namespace: OIV.Inventor.Drawers
Assembly: OIV.Inventor (in OIV.Inventor.dll) Version: 2024.1.2.0 (2024.1.2)
Syntax
public class SoScreenDrawer : SoNode

The SoScreenDrawer type exposes the following members.

Constructors
  NameDescription
Public methodSoScreenDrawer

Constructor.

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Methods
  NameDescription
Public methodAffectsState

Returns true if a node has an effect on the state during traversal.

(Inherited from SoNode.)
Public methodCallback
Public methodCopy
Calls Copy(false).
(Inherited from SoNode.)
Public methodCopy(Boolean)

Creates and returns an exact copy of the node.

(Inherited from SoNode.)
Public methodCopyFieldValues(SoFieldContainer)
Calls CopyFieldValues(fc, false).
(Inherited from SoFieldContainer.)
Public methodCopyFieldValues(SoFieldContainer, Boolean)

Copies the contents of fc's fields into this object's fields.

(Inherited from SoFieldContainer.)
Public methodDispose
Releases all resources used by SoDisposable.
(Inherited from SoDisposable.)
Public methodDistribute
(Inherited from SoNode.)
Public methodDoAction
Public methodEnableNotify

Notification at this Field Container is enabled (if flag == true) or disabled (if flag == false).

(Inherited from SoFieldContainer.)
Public methodEquals
Determines whether the specified Object is equal to the current Object.
(Inherited from Object.)
Public methodFieldsAreEqual

Returns true if this object's fields are exactly equal to fc's fields.

(Inherited from SoFieldContainer.)
Public methodGet

Returns the values of the fields of this object in the Open Inventor ASCII file format in the given string.

(Inherited from SoFieldContainer.)
Public methodGetAllFields

Returns a list of fields, including the eventIn's and eventOut's.

(Inherited from SoFieldContainer.)
Public methodGetAlternateRep

This method is called by actions to allow the node to provide an "alternate representation" when appropriate (typically depending on the action type).

(Inherited from SoNode.)
Public methodGetBoundingBox
Public methodGetEventIn

Returns a the eventIn with the given name.

(Inherited from SoFieldContainer.)
Public methodGetEventOut

Returns the eventOut with the given name.

(Inherited from SoFieldContainer.)
Public methodGetField

Returns a the field of this object whose name is fieldName.

(Inherited from SoFieldContainer.)
Public methodGetFieldName

Returns the name of the given field in the fieldName argument.

(Inherited from SoFieldContainer.)
Public methodGetFields

Appends references to all of this object's fields to resultList, and returns the number of fields appended.

(Inherited from SoFieldContainer.)
Public methodGetHashCode
Overrides GetHashCode().
(Inherited from SoNetBase.)
Public methodGetMatrix
(Inherited from SoNode.)
Public methodGetName

Returns the name of an instance.

(Inherited from SoBase.)
Public methodGetPrimitiveCount
Public methodGetRenderEngineMode

Returns the supported Render engine mode.

(Inherited from SoNode.)
Public methodGetRenderUnitID
(Inherited from SoNode.)
Public methodGetStringName (Inherited from SoBase.)
Public methodGetType
Gets the Type of the current instance.
(Inherited from Object.)
Public methodGLRender
Public methodGLRenderBelowPath
(Inherited from SoNode.)
Public methodGLRenderInPath
(Inherited from SoNode.)
Public methodGLRenderOffPath
(Inherited from SoNode.)
Public methodGrabEventsCleanup
(Inherited from SoNode.)
Public methodGrabEventsSetup
(Inherited from SoNode.)
Public methodHandleEvent

Traversal routine for OIV.Inventor.Actions.SoHandleEventAction - this will call action->setHandled() if the event is handled.

(Overrides SoNodeHandleEvent(SoHandleEventAction).)
Public methodHasDefaultValues

Returns true if all of the object's fields have their default values.

(Inherited from SoFieldContainer.)
Public methodIsBoundingBoxIgnoring

This method is used by getBoundingBox action traversal to know if the current node must be traversed or not, ie the bounding should be ignored.

(Inherited from SoNode.)
Public methodIsNotifyEnabled

Notification is the process of telling interested objects that this object has changed.

(Inherited from SoFieldContainer.)
Public methodIsOverride

Returns the state of the override flag.

(Inherited from SoNode.)
Public methodIsSynchronizable

Gets the ScaleViz synchronizable state of this object.

(Inherited from SoBase.)
Public methodNormalizePoint

Returns position normalized in range -1..1 relative to specified viewport.

Public methodPick
(Inherited from SoNode.)
Public methodRayPick
Public methodReset

Resets internal state to initial values.

Public methodSearch
(Inherited from SoNode.)
Public methodSet

Sets one or more fields in this object to the values specified in the given string, which should be a string in the Open Inventor file format.

(Inherited from SoFieldContainer.)
Public methodSetName (Inherited from SoBase.)
Public methodSetOverride

Turns the override flag on or off.

(Inherited from SoNode.)
Public methodSetSynchronizable

Sets this to be a ScaleViz synchronizable object.

(Inherited from SoBase.)
Public methodSetToDefaults

Sets all fields in this object to their default values.

(Inherited from SoFieldContainer.)
Public methodToString
Converts this SoBase structure to a human readable string.
(Inherited from SoBase.)
Public methodTouch

Marks an instance as modified, simulating a change to it.

(Inherited from SoNode.)
Public methodWrite
(Inherited from SoNode.)
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Properties
  NameDescription
Public propertyIsDisposable
ISafeDisposable interface implementation.
(Inherited from SoDisposable.)
Public propertysceneGraph

Scene graph to render.

Public propertyUserData
Gets or sets the user data to be contained by the field container.
(Inherited from SoFieldContainer.)
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Remarks

This node displays the scene graph specified by the OIV.Inventor.Drawers.SoScreenDrawer.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 OIV.Inventor.Nodes.SoAnnotation node, an OIV.Inventor.Nodes.SoPickStyle node with style = UNPICKABLE, and an OIV.Inventor.Nodes.SoOrthographicCamera node.

Classes derived from OIV.Inventor.Drawers.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, OIV.Inventor.Drawers.SoEllipseScreenDrawer, OIV.Inventor.Drawers.SoRectangleScreenDrawer, OIV.Inventor.Drawers.SoPolygonScreenDrawer or OIV.Inventor.Drawers.SoLassoScreenDrawer.

Please see OIV.Inventor.Drawers.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 OIV.Inventor.Drawers.SoScreenDrawer.HandleEvent(OIV.Inventor.Actions.SoHandleEventAction) method to handle any event.

There should only be one OIV.Inventor.Drawers.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 OIV.Inventor.Nodes.SoOrthographicCamera node.) Be careful because other classes in Open Inventor use normalized screen coordinates ranging from 0 to 1. In particular the OIV.Inventor.SbViewportRegion normalize() method and the OIV.Inventor.SbViewVolume methods that project from 3D to 2D and vice-versa.

See Also