Repository: godotengine/godot
File: editor/plugins/path_3d_editor_plugin.cpp (C++)

Code before:
	Transform3D gt = path->get_global_transform();
	Transform3D it = gt.affine_inverse();

	static const int click_dist = 10; //should make global

	Ref<InputEventMouseButton> mb = p_event;

	if (mb.is_valid()) {
		Point2 mbpos(mb->get_position().x, mb->get_position().y);

		if (!mb->is_pressed()) {
			set_handle_clicked(false);
		}

		if (mb->is_pressed() && mb->get_button_index() == MouseButton::LEFT && (curve_create->is_pressed() || (curve_edit->is_pressed() && mb->is_ctrl_pressed()))) {
			//click into curve, break it down
			Vector<Vector3> v3a = c->tessellate();
			int rc = v3a.size();
			int closest_seg = -1;
			Vector3 closest_seg_point;

			if (rc >= 2) {
				int idx = 0;
				const Vector3 *r = v3a.ptr();
				float closest_d = 1e20;

				if (p_camera->unproject_position(gt.xform(c->get_point_position(0))).distance_to(mbpos) < click_dist) {
					return EditorPlugin::AFTER_GUI_INPUT_PASS; //nope, existing
				}

				for (int i = 0; i < c->get_point_count() - 1; i++) {
					//find the offset and point index of the place to break up
					int j = idx;
					if (p_camera->unproject_position(gt.xform(c->get_point_position(i + 1))).distance_to(mbpos) < click_dist) {
						return EditorPlugin::AFTER_GUI_INPUT_PASS; //nope, existing
					}

					while (j < rc && c->get_point_position(i + 1) != r[j]) {
						Vector3 from = r[j];
						Vector3 to = r[j + 1];
						real_t cdist = from.distance_to(to);
						from = gt.xform(from);
						to = gt.xform(to);
						if (cdist > 0) {
							Vector2 s[2];
							s[0] = p_camera->unproject_position(from);
							s[1] = p_camera->unproject_position(to);
							Vector2 inters = Geometry2D::get_closest_point_to_segment(mbpos, s);
							float d = inters.distance_to(mbpos);

							if (d < 10 && d < closest_d) {

Review comment (suggestion):
```suggestion
			// Collect primary-handles.
```

Code after:
	}

	// 2. Draw handles when selected.
	if (Path3DEditorPlugin::singleton->get_edited_path() == path) {
		PackedVector3Array handle_lines;
		PackedVector3Array primary_handle_points;
		PackedVector3Array secondary_handle_points;
		PackedInt32Array collected_secondary_handle_ids; // Avoid shadowing member on Node3DEditorGizmo.

		_secondary_handles_info.resize(c->get_point_count() * 3);

		for (int idx = 0; idx < c->get_point_count(); idx++) {
			// Collect primary-handles.
			const Vector3 pos = c->get_point_position(idx);
			primary_handle_points.append(pos);

			HandleInfo info;
			info.point_idx = idx;

			// Collect in-handles except for the first point.
			if (idx > 0) {
				info.type = HandleType::HANDLE_TYPE_IN;
				const int handle_idx = idx * 3 + 0;
				collected_secondary_handle_ids.append(handle_idx);
				_secondary_handles_info.write[handle_idx] = info;

				const Vector3 in = c->get_point_in(idx);
				secondary_handle_points.append(pos + in);
				handle_lines.append(pos);
				handle_lines.append(pos + in);
			}

			// Collect out-handles except for the last point.
			if (idx < c->get_point_count()) {
				info.type = HandleType::HANDLE_TYPE_OUT;
				const int handle_idx = idx * 3 + 1;
				collected_secondary_handle_ids.append(handle_idx);
				_secondary_handles_info.write[handle_idx] = info;

				const Vector3 out = c->get_point_out(idx);
				secondary_handle_points.append(pos + out);
				handle_lines.append(pos);
				handle_lines.append(pos + out);
			}

			// Collect tilt-handles.
			{
				{
					info.type = HandleType::HANDLE_TYPE_TILT;
					const int handle_idx = idx * 3 + 2;
					collected_secondary_handle_ids.append(handle_idx);