rows working correctly

cosets/CMakeLists.txt

@@ -15,3 +15,5 @@ add_custom_command(
             ${CMAKE_CURRENT_SOURCE_DIR}/src/shaders
             ${CMAKE_CURRENT_BINARY_DIR}/shaders
 )
+
+add_executable(coxeter src/tc.cpp)

cosets/src/main.cpp

@@ -29,16 +29,16 @@ public:
 
       program = build_program("main", vs, fs);
 
-      float verts_data[4 * VERTS_N]{
-         +.5f, +.5f, 0.f, 0.f,
-         +.5f, -.5f, 0.f, 0.f,
-         -.5f, -.5f, 0.f, -.1f,
-         -.5f, +.5f, 0.f, -.1f,
+      glm::vec4 verts_data[VERTS_N]{
+         {+0.5, +0.5, +0.5, +0.0},
+         {+0.5, -0.5, +0.5, +0.0},
+         {-0.5, -0.5, +0.5, +0.0},
+         {-0.5, +0.5, +0.5, +0.0},
 
-         +.5f, +.5f, 0.f, .1f,
-         +.5f, -.5f, 0.f, .1f,
-         -.5f, -.5f, 0.2f, .0f,
-         -.5f, +.5f, 0.2f, .0f,
+         {+0.5, +0.5, +0.5, -0.5},
+         {+0.5, -0.5, +0.5, -0.5},
+         {-0.5, -0.5, +0.5, +0.5},
+         {-0.5, +0.5, +0.5, +0.5},
       };
 
       glGenBuffers(1, &verts);

cosets/src/tc.cpp

@@ -0,0 +1,62 @@
+#include <iostream>
+#include <vector>
+
+struct Row {
+   std::vector<int>::const_iterator l;
+   std::vector<int>::const_iterator r;
+
+   int from;
+   int to;
+
+   Row(const std::vector<int> &vec, int from, int to) {
+      this->l = vec.begin();
+      this->r = vec.end();
+      this->from = from;
+      this->to = to;
+   }
+};
+
+std::ostream &operator<<(std::ostream &out, const Row &row) {
+   out << "[ " << row.from << " | ";
+   auto it = row.l;
+   while (it != row.r) {
+      out << *it << " ";
+      it++;
+   }
+   out << "| " << row.to << " ]";
+   return out;
+}
+
+int main(int argc, char *argv[]) {
+   int gens = 2;
+   std::vector<std::vector<int>> ids{
+      {0, 0},
+      {1, 1},
+      {0, 1, 0, 1, 0, 1}
+   };
+
+   std::vector<int> &id = ids[2];
+   Row row(id, 8, 9);
+
+   std::cout << row << std::endl;
+
+   row.l++;
+   row.from = 6;
+
+   std::cout << row << std::endl;
+
+//   std::vector<std::vector<char>> vecs{
+//      {'a', 'o', 'e', 'u'},
+//      {'p'},
+//      {'q', 'j', 'k'},
+//   };
+//
+//   for (const auto& vec : vecs) {
+//      for (const auto& ch : vec) {
+//         std::cout << ch;
+//      }
+//      std::cout << std::endl;
+//   }
+
+   return 0;
+}