Update index buffer after precomputeVertexTable

QTProject/subdivision.cpp

@@ -177,7 +177,10 @@ Subdivision::Tables Subdivision::precomputeTables(Input 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?
+    subTimer.restart();
+    updateIndexBuffer(tables.index_buffer, modified_vertices);
+    qCDebug(log_timing) << "updateIndexBuffer:" << formatTimeMeasurement(subTimer.elapsed());
+
     qCDebug(log_subdiv) << "Precompute Tables Done";
     return tables;
 }
@@ -380,6 +383,13 @@ void Subdivision::precomputeVertexTable(Subdivision::Tables &tables, Input &inpu
     }
 }
 
+void Subdivision::updateIndexBuffer(QVector<unsigned int> &index_buffer, QMap<unsigned int, unsigned int> map) {
+    for (int i = 0; i < index_buffer.length(); i++) {
+        unsigned int old = index_buffer[i];
+        index_buffer[i] = map.value(old, old);
+    }
+}
+
 void Subdivision::splitRegular(Mesh *mesh) {
     QTime totalTimer;
     totalTimer.start();

QTProject/subdivision.h

@@ -58,6 +58,7 @@ private:
     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, QMap<unsigned int, unsigned int> &modified_vertices);
+    void updateIndexBuffer(QVector<unsigned int> &index_buffer, QMap<unsigned int, unsigned int> map);
     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);