Method AddPoint

src/KeyFrame.cpp:131–153

Add a new point on the key-frame. Each point has a primary coordinate, a left handle, and a right handle.

// Add a new point on the key-frame.  Each point has a primary coordinate,
// a left handle, and a right handle.
void Keyframe::AddPoint(Point p) {
	// candidate is not less (greater or equal) than the new point in
	// the X coordinate.
	std::vector<Point>::iterator candidate =
		std::lower_bound(begin(Points), end(Points), p.co.X, IsPointBeforeX);
	if (candidate == end(Points)) {
		// New point X is greater than all other points' X, add to
		// back.
		Points.push_back(p);
	} else if ((*candidate).co.X == p.co.X) {
		// New point is at same X coordinate as some point, overwrite
		// point.
		*candidate = p;
	} else {
		// New point needs to be inserted before candidate; thus move
		// candidate and all following one to the right and insert new
		// point then where candidate was.
		size_t const candidate_index = candidate - begin(Points);
		Points.push_back(p); // Make space; could also be a dummy point. INVALIDATES candidate!
		std::move_backward(begin(Points) + candidate_index, end(Points) - 1, end(Points));
		Points[candidate_index] = p;
	}
}

// Add a new point on the key-frame, interpolate is optional (default: BEZIER)
void Keyframe::AddPoint(double x, double y, InterpolationType interpolate)