NewAnimation creates and returns a pointer to a new Animation object.

TODO.

The animated values are linearly interpolated between keyframes.

The animated values remain constant to the output of the first keyframe, until the next keyframe.

Animation is a keyframe animation, containing channels.

A Channel associates an animation parameter channel to an interpolation sampler.

MorphChannel is the IChannel for morph geometries.

NodeChannel is the IChannel for all node transforms.

IChannel is the interface for all channel types.

InterpolationType specifies the interpolation type.

PositionChannel is the animation channel for a node's position.

RotationChannel is the animation channel for a node's rotation.

ScaleChannel is the animation channel for a node's scale.