Add method for turning patches into triangles

QTProject/subdivision.cpp

@@ -489,6 +489,19 @@ QVector<unsigned int> Subdivision::getPatchIndexBuffer(QVector<unsigned int> ib)
 }
 
 /**
+ * Turns a patch index buffer into an index buffer of triangles.
+ */
+QVector<unsigned int> Subdivision::getTriangles(QVector<unsigned int> ib) {
+    QVector<unsigned int> new_ib;
+    for (int i = 0; i < ib.length(); i += 12) {
+        new_ib.push_back(ib[i+3]);
+        new_ib.push_back(ib[i+6]);
+        new_ib.push_back(ib[i+7]);
+    }
+    return new_ib;
+}
+
+/**
  * Generates index buffers containing all regular and all irregular triangles in the input index buffer.
  *
  * @param index_buffer Index buffer describing triangles.

QTProject/subdivision.h

@@ -62,6 +62,7 @@ private:
 
     //Geht davon aus, dass jeder 3D-Punkt nur einmal im Vertex-Buffer vorkommt!
     QVector<unsigned int> getPatchIndexBuffer(QVector<unsigned int> ib);
+    QVector<unsigned int> getTriangles(QVector<unsigned int> ib);
 
     /**
      * @brief matchAndCompleteTriangle if tx ty matches sxsy, sysz or szsy, fill tz with third source vertex index.