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SoViewport Class

Viewport parameters node.

Inheritance Hierarchy

Namespace: OIV.Inventor.Nodes
Assembly: OIV.Inventor (in OIV.Inventor.dll) Version: 10.12.3.0 (10.12.3.0)
Syntax
public class SoViewport : SoNode

The SoViewport type exposes the following members.

Constructors
  NameDescription
Public methodSoViewport

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

default actions behavior

(Overrides SoNodeDoAction(SoAction).)
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
Public methodGetName

Returns the name of an instance.

(Inherited from SoBase.)
Public methodGetPrimitiveCount
(Inherited from SoNode.)
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
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 methodPick
Public methodRayPick
(Inherited from SoNode.)
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 propertyorigin

Specifies the position of the viewport in pixels.

Public propertysize

Specifies the size of the viewport in pixels.

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 specifies the viewport used for rendering.

The view volume specified by the current camera will be mapped into this region of the render target (e.g. the viewer window). By default Open Inventor manages the viewport to be the entire render target, even if the window (for example) is resized. So this node is useful for rendering objects in a specific part of the window, for example screen locked annotation graphics like legends and a "compass".

Remember that the camera node's viewportMapping field is set to ADJUST_CAMERA by default. In this mode the camera automatically adjusts its view volume to have the same aspect ratio as the viewport (widening for example) to avoid distorting shapes in the scene. But note that the camera will compare the aspect ratio of its view volume to the aspect ratio of the viewport that is in effect when the camera node is traversed. So it's generally better to create a camera for each viewport and make sure the camera node is traversed after the viewport node. If using multiple viewports with the same camera, generally the viewports should all have the aspect ratio.

Tip: You can use the OIV.Inventor.Nodes.SoDepthBuffer node to clear the depth buffer in the viewport region to ensure annotation graphics render correctly. However, in general, you should put an OIV.Inventor.Nodes.SoViewportClipping node before this node to limit the effect of the depth buffer clear to the desired viewport.

If you want to place multiple "views" inside the same window, consider the OIV.Inventor.Gui.View.PoView and OIV.Inventor.Gui.View.PoSceneView nodes. Views allow the application to specify multiple cameras, each with its own separate viewport Views can be used, for example, to subdivide the window into multiple independent views of a 3D scene or to create an inset "bird's eye" view inside the window, without the overhead of creating separate windows. The advantage of using the view nodes over OIV.Inventor.Nodes.SoViewport is that when mouse event locations are mapped back into 3D space, Open Inventor automatically uses the view volume of the camera associated with the view node whose viewport currently contains the mouse cursor.

Note Note

Node available since Open Inventor 8.6

FILE FORMAT/DEFAULT

Viewport {
origin (0,0)
size (0,0)
}

ACTION BEHAVIOR

OIV.Inventor.Actions.SoGLRenderAction Sets: OIV.Inventor.Elements.SoViewportRegionElement

See Also