Generate map from old vertex index to new one

QTProject/subdivision.cpp

@@ -172,8 +172,9 @@ Subdivision::Tables Subdivision::precomputeTables(Input input) {
     precomputeEdgeTable(tables, triangles, triangles_regular, (unsigned int) vb.length());
     qCDebug(log_timing) << "precomputeEdgeTable:" << formatTimeMeasurement(subTimer.elapsed());
 
+    QMap<unsigned int, unsigned int> modified_vertices;
     subTimer.restart();
-    precomputeVertexTable(tables, input);
+    precomputeVertexTable(tables, input, modified_vertices);
     qCDebug(log_timing) << "precomputeVertexTable:" << formatTimeMeasurement(subTimer.elapsed());
 
     //tables.patch_index_regular = getPatchIndexBuffer(ib, QVector<unsigned int>());//TODO pass regular and irregular index buffer?
@@ -303,7 +304,7 @@ void Subdivision::precomputeEdgeTable(Subdivision::Tables &tables, QVector<Trian
     }
 }
 
-void Subdivision::precomputeVertexTable(Subdivision::Tables &tables, Input &input) {
+void Subdivision::precomputeVertexTable(Subdivision::Tables &tables, Input &input, QMap<unsigned int, unsigned int> &modified_vertices) {
     //compute vertex table
     //Format: First entry: original vertex. Other entries: adjacent vertices.
     QVector<QVector<unsigned int> > duplicates;//for debugging
@@ -315,6 +316,7 @@ void Subdivision::precomputeVertexTable(Subdivision::Tables &tables, Input &inpu
         QVector<Vertex> adj_v;//helfer
         tables.vertex_offsets.push_back(offset);
         tables.vertex_indices.push_back(i);
+        modified_vertices.insert(i, i);
         offset++;
 
         Vertex originalVertex = input.vertex_buffer[i];

QTProject/subdivision.h

@@ -57,7 +57,7 @@ private:
     QOpenGLShaderProgram *initComputeShaderProgram(QString &source);
     Tables precomputeTables(Input input);
     void precomputeEdgeTable(Subdivision::Tables &tables, QVector<Triangle> &triangles, QVector<Triangle> &triangles_regular, unsigned int offset);
-    void precomputeVertexTable(Subdivision::Tables &tables, Input &input);
+    void precomputeVertexTable(Subdivision::Tables &tables, Input &input, QMap<unsigned int, unsigned int> &modified_vertices);
     void findRegular(QVector<unsigned int> index_buffer, QVector<Vertex> vertex_buffer, QVector<unsigned int> &regular, QVector<unsigned int> &irregular);
     Result runShader(Input input, Tables &tables);
     void runVertexShader(GLuint size, GLuint vb_handle, GLuint vertex_indices_handle, GLuint vertex_offsets_handle, GLuint output_handle);