static vector<Segment> segmentsFromBranch(const Branch& branch) {
vector<Segment> segments = branch.body();
for (const auto& childBranch : branch.branches()) {
auto branchSegments = segmentsFromBranch(childBranch);
move(begin(branchSegments), end(branchSegments), back_inserter(segments));
}
return segments;
}
void WireFrameTreeRenderer::drawBranch(const Branch& branch, ID2D1DeviceContext2& context) {
drawSegments(branch.body(), context);
drawBranches(branch.branches(), context);
drawLeaves(branch.leaves(), context);
}