locatingpin.hpp File Reference

Implementing the Placement mechanics. More...

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Description

Implementing the Placement mechanics.

The various specifications how to place some MObject (logically) within the Session are given by small LocatingPin objects forming a chain. For resolving the actual position, at the moment (10/07) we use a preliminary implementation to support the most common Placement types (fixed and relative). It is comprised of the nested LocatingSolution and the functions FixedLocation::resolve(LocatingSolution&) and RelativeLocation::resolve(LocatingSolution&) etc. If this is to be extended, we'll need a real spatial discrete constraint solver (and this probably will be some library implementation, because the problem is anything but trivial).

Todo:

this can be considered a preliminary sketch without being backed by actual functionality. Just enough to be able to drive the design of other parts ahead. See esp. TICKET #100, which contains an idea for a refactoring.

Definition in file locatingpin.hpp.

#include "steam/common.hpp"
#include "lib/time/timevalue.hpp"
#include <utility>
#include <memory>

Namespaces
namespace	steam
	Steam-Layer implementation namespace root.
namespace	steam::asset
	The asset subsystem of the Steam-Layer.
namespace	steam::mobject
	Media-Objects, edit operations and high-level session.
namespace	steam::mobject::session
	Namespace of Session and user visible high-level objects.

Typedefs
typedef PlacementRef< MObject >	PlaRef
	TODO: as of 5/09 the idea is to phase out direct dependency on the placement class and recast those dependencies in terms of PlacementRef.

Classes
class	LocatingPin
	Positioning specification, possibly chained to further specifications. More...
struct	LocatingPin::LocatingSolution

Functions
bool	operator== (LocatingPin const &pin1, LocatingPin const &pin2)
	check for equivalent definition of a complete locating chain