diff -r 121a40d5e34c -r 8e1c9f18ae15 src/vertexmap.cpp
--- a/src/vertexmap.cpp	Tue Jul 27 13:23:34 2021 +0300
+++ b/src/vertexmap.cpp	Tue Jul 27 16:29:00 2021 +0300
@@ -28,12 +28,29 @@
 void VertexMap::build()
 {
 	this->map.clear();
+	this->vertices.clear();
 	this->model->apply<ldraw::Object>([&](const ldraw::Object* object)
 	{
 		for (int i = 0; i < object->numPoints(); i += 1)
 		{
 			const glm::vec3& point = object->getPoint(i);
-			this->map[qHash(point)].insert(object->id);
+			const unsigned int hash = qHash(point);
+			this->map[hash].insert(object->id);
+			this->vertices[hash] = point;
 		}
 	});
+	Q_EMIT this->verticesChanged();
 }
+
+/**
+ * @brief Apply \c fn for all vertices in the map.
+ * @param fn
+ */
+void VertexMap::apply(ApplyFunction fn) const
+{
+	for (auto it = this->map.cbegin(); it != this->map.cend(); ++it)
+	{
+		const glm::vec3& point = this->vertices.at(it->first);
+		fn(point, it->second);
+	}
+}