| SoScreenDrawer Class |
Base class to draw a scene graph in screen space.
Inheritance HierarchyOIV.InventorSoNetBase
OIV.InventorSoDisposable
OIV.Inventor.MiscSoBase
OIV.Inventor.FieldsSoFieldContainer
OIV.Inventor.NodesSoNode
OIV.Inventor.DrawersSoScreenDrawer
OIV.Inventor.DrawersSoPolyLineScreenDrawer
Namespace: OIV.Inventor.Drawers
Assembly: OIV.Inventor (in OIV.Inventor.dll) Version: 2024.2.2.0 (10.16.2.0)
SyntaxThe SoScreenDrawer type exposes the following members.
Constructors| Name | Description | |
|---|---|---|
 | SoScreenDrawer | Constructor. |
Methods| Name | Description | |
|---|---|---|
| AffectsState | Returns true if a node has an effect on the state during traversal. |
| Callback | (Overrides SoNodeCallback(SoCallbackAction).) |
| Copy | Calls Copy(false). (Inherited from SoNode.) |
| Copy(Boolean) | Creates and returns an exact copy of the node. |
| CopyFieldValues(SoFieldContainer) | Calls CopyFieldValues(fc, false). (Inherited from SoFieldContainer.) |
| CopyFieldValues(SoFieldContainer, Boolean) | Copies the contents of fc's fields into this object's fields. |
| Dispose |
Releases all resources used by SoDisposable.
(Inherited from SoDisposable.) |
| Distribute | (Inherited from SoNode.) |
| DoAction | (Overrides SoNodeDoAction(SoAction).) |
| EnableNotify | Notification at this Field Container is enabled (if flag == true) or disabled (if flag == false). |
| Equals | Determines whether the specified Object is equal to the current Object. (Inherited from Object.) |
| FieldsAreEqual | Returns true if this object's fields are exactly equal to fc's fields. |
| Get | Returns the values of the fields of this object in the Open Inventor ASCII file format in the given string. |
| GetAllFields | Returns a list of fields, including the eventIn's and eventOut's. |
| GetAlternateRep | This method is called by actions to allow the node to provide an "alternate representation" when appropriate (typically depending on the action type). |
| GetBoundingBox | (Overrides SoNodeGetBoundingBox(SoGetBoundingBoxAction).) |
| GetEventIn | Returns a the eventIn with the given name. |
| GetEventOut | Returns the eventOut with the given name. |
| GetField | Returns a the field of this object whose name is fieldName. |
| GetFieldName | Returns the name of the given field in the fieldName argument. |
| GetFields | Appends references to all of this object's fields to resultList, and returns the number of fields appended. |
| GetHashCode |
Overrides GetHashCode().
(Inherited from SoNetBase.) |
| GetMatrix | (Inherited from SoNode.) |
| GetName | Returns the name of an instance. |
| GetPrimitiveCount | (Overrides SoNodeGetPrimitiveCount(SoGetPrimitiveCountAction).) |
| GetRenderEngineMode | Returns the supported Render engine mode. |
| GetRenderUnitID | (Inherited from SoNode.) |
| GetStringName | (Inherited from SoBase.) |
| GetType | Gets the Type of the current instance. (Inherited from Object.) |
| GLRender | (Overrides SoNodeGLRender(SoGLRenderAction).) |
| GLRenderBelowPath | (Inherited from SoNode.) |
| GLRenderInPath | (Inherited from SoNode.) |
| GLRenderOffPath | (Inherited from SoNode.) |
| GrabEventsCleanup | (Inherited from SoNode.) |
| GrabEventsSetup | (Inherited from SoNode.) |
| HandleEvent | Traversal routine for OIV.Inventor.Actions.SoHandleEventAction - this will call action->setHandled() if the event is handled. |
| HasDefaultValues | Returns true if all of the object's fields have their default values. |
| IsBoundingBoxIgnoring | 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. |
| IsNotifyEnabled | Notification is the process of telling interested objects that this object has changed. |
| IsOverride | Returns the state of the override flag. |
| IsSynchronizable | Gets the ScaleViz synchronizable state of this object. |
| NormalizePoint | Returns position normalized in range -1..1 relative to specified viewport. |
| Pick | (Inherited from SoNode.) |
| RayPick | (Overrides SoNodeRayPick(SoRayPickAction).) |
| Reset | Resets internal state to initial values. |
| Search | (Inherited from SoNode.) |
| Set | 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. |
| SetName | (Inherited from SoBase.) |
| SetOverride | Turns the override flag on or off. |
| SetSynchronizable | Sets this to be a ScaleViz synchronizable object. |
| SetToDefaults | Sets all fields in this object to their default values. |
| ToString |
Converts this SoBase structure to a human readable string.
(Inherited from SoBase.) |
| Touch | Marks an instance as modified, simulating a change to it. |
| Write | (Inherited from SoNode.) |
Properties| Name | Description | |
|---|---|---|
 | IsDisposable | ISafeDisposable interface implementation.
(Inherited from SoDisposable.) |
| sceneGraph | Scene graph to render. |
| UserData |
Gets or sets the user data to be contained by the field container.
(Inherited from SoFieldContainer.) |
RemarksThis 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