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All of the classes discussed here are located in the j3dui.control.mappers.intuitive package. Table 19. 2 summarizes the basic classes and interfaces that the framework provides for generalized intuitive coordinate mapping. Figure 19. 3 shows the relationship of the building blocks.

Table 19. 2 Classes and interfaces related to intuitive coordinate mapping

Class/Interface	Description	Input Events	Output Events
IntutiveDragMapper	A coordinate mapper for input drag to source drag conversion. Uses a plug-in to per-form a specific type of coordinate mapping	InputDragTarget	SourceDragTarget
IntuitiveDragMapperPlugin	The abstract base class for intuitive drag mapper plug-ins
SourceDragTarget	Event interface for reporting source drag gestures
SourceDragSplitter	Source drag event splitter	SourceDragTarget	SourceDragTarget
SourceDragFilter	The source drag filter, which uses a plug-in to perform a specific filtering operation	SourceDragTarget	SourceDragTarget
AbsoluteSourceDragPlugin	A source drag filter plug-in that interprets the drag with an absolute drag origin
RelativeSourceDragPlugin	A source drag filter plug-in that interprets the drag with a relative drag origin
SourceDragMapper	A coordinate mapper for source drag to target drag to actuation conversion. Uses a plug-in to perform a specific type of coordinate mapping	SourceDragTarget	ActuationTarget
SourceDragMapperPlugin	The abstract base class for source drag mapper plug-ins
DirectSourceDragPlugin	A source drag mapper plug-in that performs source scale and target offset, and that maps source dimensions to none, one, or more output dimensions
AxisAngleSourceDragPlugin	A source drag mapper plug-in that maps a rotation about a fixed source axis to a rotation about the corresponding tar-get axis

In the following discussion of the framework's building blocks for intuitive map-ping, you'll notice a number of similarities with earlier building blocks. This should come as no surprise because many of the same operations still need to be performed, such as input drag mapping, output actuation mapping, and drag filtering, only here these operations involve 3D source space instead of 2D input space. Also, source and target spaces are defined in terms of nodes living in those spaces. The building blocks automatically configure such nodes for live access of their local-to-Vworld transforms, and make extensive use of the framework's local-to-local spatial transform utilities— the Mapper.toTargetSpace methods— to perform source-to-target spatial transforms.

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