From 5451196183e23d145bc6f078cb354baa9071b7d7 Mon Sep 17 00:00:00 2001
From: allem <allemang.d@gmail.com>
Date: Sun, 15 Sep 2019 16:19:10 -0400
Subject: [PATCH] easier distinction between orientations

---
 cosets/src/main.cpp      |  6 +++---
 cosets/src/util/mesh.hpp | 14 +++++++-------
 2 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/cosets/src/main.cpp b/cosets/src/main.cpp
index 86d02ab..daa64a1 100644
--- a/cosets/src/main.cpp
+++ b/cosets/src/main.cpp
@@ -40,7 +40,7 @@ public:
 
       const int N = 3;
       const Mults &mults = schlafli<N>({5, 3});
-      vert_data = vertices<N>(mults, {5, 1, 1});
+      vert_data = vertices<N>(mults, {1, 1, 1});
       edge_data = edges<N>(mults);
       face_data = faces<N>(mults);
 
@@ -112,8 +112,8 @@ public:
       glEnable(GL_CULL_FACE);
 
       glBindVertexArray(vert_vao);
-      glUniform4f(0, 1, 1, 1, 1);
-//      glDrawArrays(GL_POINTS, 0, vert_data.size());
+      glUniform4f(0, 1, 0, 0, 1);
+      glDrawArrays(GL_POINTS, 0, vert_data.size());
 
       glBindVertexArray(edge_vao);
       glUniform4f(0, 1, 0, 0, 1);
diff --git a/cosets/src/util/mesh.hpp b/cosets/src/util/mesh.hpp
index 07e552e..e5d0d39 100644
--- a/cosets/src/util/mesh.hpp
+++ b/cosets/src/util/mesh.hpp
@@ -70,11 +70,15 @@ std::vector<int> faces(const Mults &mults) {
 
    Table *t_vert = solve<N>({}, mults);
 
+   // todo: try the combinations individually and try to find the pattern.
+
    // for each *kind* of face
+//   std::vector<int> sg_face{0,1};
    for (const auto &sg_face : combinations(N, 2)) {
       Table *cs_face = solve<N>(sg_face, mults);
 
       // for each *kind* of edge
+//      std::vector<int> sg_edge{1};
       for (const auto &sg_edge : combinations(sg_face, 1)) {
          Table *cs_edge = solve(sg_face, sg_edge, mults);
 
@@ -95,17 +99,13 @@ std::vector<int> faces(const Mults &mults) {
                }
                res.push_back(t_vert->apply(0, c_face));
 
-               int s = 0;
-               s += c_edge.size();
-               s += c_face.size();
-               s += sg_edge[0];
-               s += sg_face[0] + sg_face[1];
+               int s = c_edge.size() + sg_edge[0];
+               int t = c_face.size() + sg_face[0] + sg_face[1];
 
-               if (s % 2 == 0) {
+               if (s % 2 == 0 xor t % 2 == 0) {
                   std::swap(res[res.size() - 1], res[res.size() - 2]);
                }
             }
-//            break;
          }
       }
    }