started patch detection. compiles, not used yet. stopped because I don't know…

QTProject/subdivision.cpp

@@ -318,6 +318,39 @@ Subdivision::Tables Subdivision::precomputeTables(Input input) {
     return tables;
 }
 
+void Subdivision::extractPatches(QVector<unsigned int> index_buffer, QVector<Vertex> vertex_buffer, QVector<Subdivision::Patch> &patches){
+    patches.clear();
+
+    for (unsigned int i = 0; i < index_buffer.length()-2; i += 3){
+        Vertex vx = vertex_buffer[index_buffer[i]];
+        Vertex vy = vertex_buffer[index_buffer[i+1]];
+        Vertex vz = vertex_buffer[index_buffer[i+2]];
+
+        int countx = 0;
+        int county = 0;
+        int countz = 0;
+        for(unsigned int j = 0; j < index_buffer.length(); j++){
+            if (j != i && j != i+1 && j != i+2){
+                if (vx.samePos(vertex_buffer[index_buffer[j]])){
+                    countx++;
+                }
+                if (vy.samePos(vertex_buffer[index_buffer[j]])){
+                    county++;
+                }
+                if (vz.samePos(vertex_buffer[index_buffer[j]])){
+                    countz++;
+                }
+            }
+        }
+        if (countx != 5 || county != 5 || countz != 5){
+            //triangle is irregular
+        }
+
+    }
+
+
+}
+
 Subdivision::Result Subdivision::runShader(Input input, Tables &tables) {
     qDebug()<<"Running compute shader";
 

QTProject/subdivision.h

@@ -37,6 +37,12 @@ private:
       QVector<Vertex> vertex_buffer;
     };
 
+    struct Patch
+    {
+        QVector<unsigned int> index_buffer;
+        bool is_regular;
+    };
+
     QOpenGLFunctions_4_3_Core *f;
     QOpenGLShaderProgram *edgeShader;
     QOpenGLShaderProgram *vertexShader;
@@ -46,6 +52,8 @@ private:
     Result runShader(Input input, Tables &tables);
     void runVertexShader(GLuint size, GLuint vb_handle, GLuint vertex_indices_handle, GLuint vertex_offsets_handle, GLuint output_handle);
     void runEdgeShader(GLuint size, GLuint vb_handle, GLuint edge_indices_handle, GLuint output_handle, GLuint offset);
+
+    void extractPatches(QVector<unsigned int> index_buffer, QVector<Vertex> vertex_buffer, QVector<Patch> &patches);
 };
 
 #endif