actions(3)

NAME

Actions

Detailed Description

Classes

class SoAction

The SoAction class is the base class for all traversal actions.

Applying actions is the basic mechanism in Coin for executing various
operations on scene graphs or paths within scene graphs, including
search operations, rendering, interaction through picking, etc. "

class SoAudioRenderAction

The SoAudioRenderAction class renders the aural parts of the scene graph.

Applying this method at a root node for a scene graph, path or pathlist will render all sound-related nodes contained within that instance to
the current SoAudioDevice. "

class SoBoxHighlightRenderAction

The SoBoxHighlightRenderAction class renders the scene with highlighted boxes around selections.

This action performs the same tasks as its parent class,
SoGLRenderAction, with the added ability to render highlighted bounding boxes around geometry in selected nodes. This is a simple but
convenient way of giving feedback to the user upon interaction with the scene graph. "

class SoCallbackAction

The SoCallbackAction class invokes callbacks at specific nodes.

This action has mechanisms for tracking traversal position and
traversal state. In combination with the ability to pass geometry
primitives to callback actions set by the user, this does for instance make it rather straightforward to extract the geometry of a scene
graph. "

class SoGLRenderAction

The SoGLRenderAction class renders the scene graph with OpenGL calls.

Applying this method at a root node for a scene graph, path or pathlist will render all geometry contained within that instance to the current OpenGL context. "

class SoGetBoundingBoxAction

The SoGetBoundingBoxAction class calculates bounding boxes for nodes and subgraphs.

If this action is applied to a path or scene graph root, it will
calculate the bounding box and the center point of the geometry
contained within the scene. "

class SoGetMatrixAction

The SoGetMatrixAction class is an action for accumulating the transformation matrix of a subgraph.

This action makes it easy to calculate and convert to and from the
global coordinate system of your scene and local coordinates of parts
in a hierarchical model. "

class SoGetPrimitiveCountAction

The SoGetPrimitiveCountAction class counts the primitives in a scene.

Apply this action to a scene if you need to know the number of
primitives present in a scenegraph, or parts of a scenegraph. "

class SoHandleEventAction

The SoHandleEventAction class distributes user events to the scene.

This is the action used by the GUI viewer classes to pass interaction
events from the window system to the nodes in the scene graph. "

class SoLineHighlightRenderAction

The SoLineHighlightRenderAction class renders selections with line highlighting.

See the documentation of SoBoxHighlightRenderAction. "

class SoPickAction

The SoPickAction class is the base class for picking actions.

The basis for all interaction features that Coin provides for the
application programmer is the pick actions. Draggers, manipulators,
SoSelection nodes, etc all make use of the functionality provided by the pick actions for selecting and manipulating scene geometry in
various ways. "

class SoRayPickAction

The SoRayPickAction class does ray intersection with scene graphs.

For interaction with the scene graph geometry, it is necessary to be
able to do intersection testing for rays. This functionality is
provided by the SoRayPickAction class. "

class SoSearchAction

The SoSearchAction class provides methods for searching through scene graphs.

Nodes can be searched for by pointer, type, and name, or a combination of those criteria. Types can be interpreted as exact types, or the type can match nodes derived from it. Every single node can be searched, or normal traversal rules can be followed when searching (this is
especially important to note with regard to switch nodes). "

class SoToVRMLAction

The SoToVRMLAction class builds a new scene graph using only VRML 1.0 nodes.

This action is used for converting a scene graph of VRML2/VRML97 nodes to a new scene graph using only VRML1 compatible nodes. "

class SoToVRML2Action

The SoToVRML2Action class builds a new scene graph, using only VRML97/VRML2 nodes.

This action is used for converting a scene graph of VRML1/Coin nodes to a new scene graph using only VRML97/VRML2 nodes. "

class SoWriteAction

The SoWriteAction class writes a scene graph to file.

When applied to a scene, this action writes its contents to the stream contained within an SoOutput instance. This can be a file, a memory buffer or a system filehandle like stdout, for instance. "

class SoReorganizeAction

The SoReorganizeAction class reorganizes your scene graph to optimize traversal/rendering.

class SoIntersectionDetectionAction

The SoIntersectionDetectionAction class is for detecting intersecting primitives in a scene.

Note that only collisions between actual geometry in the scene is
detected, so the contents of some special nodes like e.g. SoText2 and SoImage (which projects to screen-plane bitmap graphics, and not actual polygons) will not be considered for collision detection. "

class SoActionMethodList

The SoActionMethodList class contains function pointers for action methods.

An SoActionMethodList contains one function pointer per node type. Each action contains an SoActioMethodList to know which functions to call
during scene graph traversal. "

class SoEnabledElementsList

The SoEnabledElementsList class is a container for type info for element types that are enabled in actions.

This class is probably not interesting for the application programmer. "

Version 2.5.0 28 Jun 2008 Actions(3)