Write new vertices at the end of the buffer

QTProject/subdivision.cpp

@@ -317,13 +317,14 @@ void Subdivision::precomputeVertexTable(Subdivision::Tables &tables, Input &inpu
     QVector<QVector<unsigned int> > duplicates;//for debugging
     QVector<unsigned int> ib_combined = input.index_irregular_buffer + input.index_regular_buffer;
     unsigned int offset = 0;
+    unsigned int output_offset = input.vertex_buffer.size() + tables.edge_indices.size() / 4;
     for (int i = 0; i < input.vertex_buffer.length(); i++){
         //hat evtl viel redundanz
 
         QVector<Vertex> adj_v;//helfer
         tables.vertex_offsets.push_back(offset);
         tables.vertex_indices.push_back(i);
-        modified_vertices.insert(i, i);
+        modified_vertices.insert(i, output_offset + i);
         offset++;
 
         Vertex originalVertex = input.vertex_buffer[i];
@@ -745,7 +746,7 @@ Subdivision::Result Subdivision::runShader(Input input, Tables &tables) {
     runEdgeShader(tables.edge_indices.size() / 4, input.vb_handle, edge_indices_handle, output_handle, edge_offset);
     int edgeTime = timer.elapsed();
     timer.restart();
-    int vertex_offset = 0;
+    int vertex_offset = edge_offset + tables.edge_indices.size() / 4;
     runVertexShader(input.vertex_buffer.size(), input.vb_handle, vertex_indices_handle, vertex_offsets_handle, output_handle, vertex_offset);
     int vertexTime = timer.elapsed();