SoPointLightManip Class Reference
[Manips]

Point light node with 3D interface for editing location. More...

#include <Inventor/manips/SoPointLightManip.h>

Inheritance diagram for SoPointLightManip:
SoPointLight SoLight SoNode SoFieldContainer SoBase SoRefCounter SoTypedObject

List of all members.

Public Member Functions

virtual SoType getTypeId () const
 SoPointLightManip ()
SoDraggergetDragger ()
SbBool replaceNode (SoPath *p)
SbBool replaceManip (SoPath *p, SoPointLight *newOne) const

Static Public Member Functions

static SoType getClassTypeId ()

Detailed Description

Point light node with 3D interface for editing location.

SoPointLightManip is the base class for all SoPointLight nodes that have a built-in 3D user interface (this is the only such class provided with the Open Inventor toolkit). Since it is derived from SoPointLight, any changes to its fields result in a change of lighting for nodes that follow it in the scene graph. In this case, the interface edits the location field. Also, the color of the manipulator's geometry will reflect the color of the light (but you can not edit the color using this manipulator).

Typically, you will want to replace a regular SoPointLight with an SoPointLightManip (as when the user selects a light to be edited), or vice versa (as when the user is done moving the light and the interface should go away). Use the replaceNode() method to insert a manipulator into a scene graph, and the replaceManip() method to remove it when done.

The SoPointLightManip utilizes an SoPointLightDragger to provide a 3D interface. However, the manipulator differs from the dragger; it lights other objects in the scene because, as an SoPointLight, it alters the state. The fields values and movement of the dragger, on the other hand, affect only the dragger itself. To find out more about how the interface works and what each part will do, see the reference page for SoPointLightDragger. The interfaces of the dragger and the manipulator are identical.

The SoPointLightManip utilizes its dragger by adding it as a hidden child. When an action is applied to the manipulator, such as rendering or handling events, the manipulator first traverses the dragger, and then the manipulator adds its lighting parameters to the state. When you click-drag-release over the manipulator, it passes these events down to the dragger, which moves as a result ("I can't <B> help </B> it, I'm a dragger!").

The manipulator maintains consistency between the fields of the dragger and its own fields. Let's say you use the mouse to translate the dragger . Callbacks insure that the location field of the manipulator will change by the same amount, thus changing the lighting of nodes which follow in the scene graph. Similarly, if you set the location field of the SoPointLightManip, the manipulator will place the dragger accordingly.

Because the dragger is a hidden child, you can see the dragger on screen and interact with it, but the dragger does not show up when you write the manipulator to file. Also, any SoPath will end at the manipulator. (See the Actions section of this reference page for a complete description of when the dragger is traversed).

You can get this dragger from the manipulator using the getDragger() method. You will need to do this if you want to change the geometry of a manipulator, since the geometry actually belongs to the dragger.

FILE FORMAT/DEFAULT

ACTION BEHAVIOR

SEE ALSO

SoDragger, SoPointLight, SoPointLightDragger, SoDirectionalLightManip, SoSpotLightManip


Constructor & Destructor Documentation

SoPointLightManip::SoPointLightManip (  ) 

Constructor.


Member Function Documentation

static SoType SoPointLightManip::getClassTypeId (  )  [static]

Returns the type identifier for this class.

Reimplemented from SoPointLight.

SoDragger* SoPointLightManip::getDragger (  ) 

Returns the dragger being used by this manipulator.

You can customize this dragger just like you would with any other dragger. You can change geometry using the setPart() method, or add callbacks using the methods found in the SoDragger reference page.

virtual SoType SoPointLightManip::getTypeId (  )  const [virtual]

Returns the type identifier for this specific instance.

Reimplemented from SoPointLight.

SbBool SoPointLightManip::replaceManip ( SoPath p,
SoPointLight newOne 
) const

Replaces the tail of the path, which must be this manipulator, with the given SoPointLight node.

If the path has a nodekit, this will try to use setPart() to insert the new node. Otherwise, the manipulator requires that the next to last node in the path chain be a group.

The field values from the manipulator will be copied to the point light node, and the manipulator will be replaced.

The manipulator will not call ref() or unref() on the node which is replacing it.

The manipulator will not make any changes to field connections. The calling process is thus responsible for keeping track of its own nodes and field connections.

SbBool SoPointLightManip::replaceNode ( SoPath p  ) 

Replaces the tail of the path with this manipulator.

The tail of the path must be an SoPointLight node (or subclass thereof). If the path has a nodekit, this will try to use setPart() to insert the manipulator. Otherwise, the manipulator requires that the next to last node in the path chain be a group.

The field values from the point light node will be copied to this manipulator, and the light node will be replaced.

The manipulator will not call ref() on the node it is replacing.

The old node will disappear if it has no references other than from the input path p and its parent, since this manipulator will be replacing it in both of those places. Nor will the manipulator make any changes to field connections of the old node. The calling process is thus responsible for keeping track of its own nodes and field connections.


The documentation for this class was generated from the following file:

Open Inventor Toolkit reference manual, generated on 30 May 2021
Copyright © Thermo Fisher Scientific All rights reserved.
http://www.openinventor.com/