Action Classes

Actions are objects that traverse a scene graph to drive some scene-related process. More...

Classes
class	SoAction
	The SoAction class is the base class for all traversal actions. More...
class	SoBoxHighlightRenderAction
	The SoBoxHighlightRenderAction class renders the scene with highlighted boxes around selections. More...
class	SoCallbackAction
	The SoCallbackAction class invokes callbacks at specific nodes. More...
class	SoGLRenderAction
	The SoGLRenderAction class renders the scene graph with OpenGL calls. More...
class	SoGetBoundingBoxAction
	The SoGetBoundingBoxAction class calculates bounding boxes for nodes and subgraphs. More...
class	SoGetMatrixAction
	The SoGetMatrixAction class is an action for accumulating the transformation matrix of a subgraph. More...
class	SoGetPrimitiveCountAction
	The SoGetPrimitiveCountAction class counts the primitives in a scene. More...
class	SoHandleEventAction
	The SoHandleEventAction class distributes user events to the scene. More...
class	SoLineHighlightRenderAction
	The SoLineHighlightRenderAction class renders selections with line highlighting. More...
class	SoPickAction
	The SoPickAction class is the base class for picking actions. More...
class	SoRayPickAction
	The SoRayPickAction class does ray intersection with scene graphs. More...
class	SoReorganizeAction
	The SoReorganizeAction class reorganizes your scene graph to optimize traversal/rendering. More...
class	SoSearchAction
	The SoSearchAction class provides methods for searching through scene graphs. More...
class	SoToVRMLAction
	The SoToVRMLAction class builds a new scene graph using only VRML 1.0 nodes. More...
class	SoToVRML2Action
	The SoToVRML2Action class builds a new scene graph, using only VRML97/VRML2 nodes. More...
class	SoWriteAction
	The SoWriteAction class writes a scene graph to file. More...
class	SoAudioRenderAction
	The SoAudioRenderAction class renders the aural parts of the scene graph. More...
class	SoActionMethodList
	The SoActionMethodList class contains function pointers for action methods. More...
class	SoEnabledElementsList
	The SoEnabledElementsList class is a container for type info for element types that are enabled in actions. More...
class	SoIntersectionDetectionAction
	The SoIntersectionDetectionAction class is for detecting intersecting primitives in a scene. More...

Detailed Description

Actions are objects that traverse a scene graph to drive some scene-related process.

One example is OpenGL rendering, and another one ray picking. At the most basic level, most action management will be done for the user behind the scenes in an SoSceneManager object, and the only actions one might need to get acquainted with are SoSearchAction and SoWriteAction.

For more advanced usage of Coin, one might want (or need) to take full control over driving all the actions oneself, in which case one will also need to know about the SoGLRenderAction, SoHandleEventAction, SoGetBoundingBoxAction, and SoRayPickAction.

The remaining actions are mostly more special-purpose actions of various kinds, except for the SoCallbackAction.

Before going to the step of implementing an extension action, one should really take a good look at the SoCallbackAction class, which is a general-purpose action that can be used as the framework for implementing almost any traversal-based process, with callback-hooks for all kinds of events that happen during traversal. In most cases, one can avoid the hassle of writing a new action, and just use SoCallbackAction instead.