evaluate method
Model-space matrices of every node in pose, column-major, 16 floats
each, into out (nodeCount * 16 long). A node the file gave as a
matrix uses that matrix.
Implementation
void evaluate(Pose pose, Float32List out) {
for (final n in _order) {
final o = n * 16;
final node = model.nodes[n];
if (node.translation == null) {
out.setAll(o, node.local.storage);
} else {
_compose(pose, n, out, o);
}
final parent = _parents[n];
if (parent >= 0) _multiplyInPlace(out, parent * 16, o);
}
}