Main change is that features take reference to containing object instead
of pointer, as the feature must always belong to some object. Feature
groups now return references to features and features return reference
to containing object, as these cannot be null.
Passing `*this` to AbstractFeature (and Camera[23]D) constructor might
now clash with deleted copy constructor, added templated constructor to
catch and resolve these ambiguous cases.
Makes some cases less consistent (and some convenience shortcuts
impossible), but goes well with the attitude "don't use pointer when it
can't be null".
Use AbstractFeature<dimensions, T>, AbstractGroupedFeature<...>,
AbstractFeatureGroup<...>, FeatureGroup<...> like before and add two
kinds of aliases instead of only one, one with *Basic* for abstract type
and one for Float type.
Partially reverts commit 572efce3f7.
Use Animable<dimensions, T> and AnimableGroup<dimensions, T> like before
and add two kinds of aliases instead of only one:
BasicAnimable[Group]2D<T>/BasicAnimable[Group]3D<T> for abstract type
and Animable[Group]2D/Animable[Group]3D for Float.
Partially reverts commit c32c12b387.
Use AbstractObject<dimensions, T> like before and add two kinds of
aliases instead of only one:
AbstractBasicObject2D<T>/AbstractBasicObject3D<T> for abstract type and
AbstractObject2D/AbstractObject2D for Float.
Makes it easier to use AbstractObject in templates of fixed dimensions
(e.g. Bullet integration, where it can now be written as
`AbstractBasicObject2D<btScalar>` instead of potentially confusing
`AbstractBasicObject<2, btScalar>`).
Partially reverts commit cfd405c32c.
Allows to animate objects, pause, repeat and resume the animations. The
user implements animation step and can perform actions on state changes.
Each Animable is part of some group which is optimized for case when no
animation is running, thus it is possible to create multiple independent
"animation islands" to improve performance.
Vladimír Vondruš