Add trianglesToIB

QTProject/triangle.cpp

@@ -192,6 +192,17 @@ void ibToTriangles(QVector<Vertex> *vb, QVector<unsigned int> &ib, QVector<Trian
     }
 }
 
+void trianglesToIB(const QVector<Triangle> &triangles, QVector<unsigned int> &ib) {
+    ib.reserve(ib.length() + triangles.length() * 3);
+    QVectorIterator<Triangle> it(triangles);
+    while (it.hasNext()) {
+        Triangle triangle = it.next();
+        ib.push_back(triangle.u_idx());
+        ib.push_back(triangle.v_idx());
+        ib.push_back(triangle.w_idx());
+    }
+}
+
 Triangle::Neighbor Triangle::Neighbors::get_neighbor(Triangle::Edge::Name name) const {
     switch (name) {
         case Triangle::Edge::Name::uv:

QTProject/triangle.h

@@ -73,6 +73,7 @@ class Triangle {
 
 Triangle::Edge::Name rotate_edge_name(Triangle::Edge::Name edge);
 void ibToTriangles(QVector<Vertex> *vb, QVector<unsigned int> &ib, QVector<Triangle> &triangles);
+void trianglesToIB(const QVector<Triangle> &triangles, QVector<unsigned int> &ib);
 
 QDebug operator<<(QDebug d, const Triangle &triangle);