nilrider:: nlrOrder flag to order the triangles correctly

rogueviz/nilrider/level.cpp

@@ -247,6 +247,13 @@ void level::init() {
     // println(hlog, shFloor[i].s, " to ", shFloor[i].e);
     }
   
+  if(flags & nrlOrder) {
+    sort(triangles.begin(), triangles.end(), [this] (triangledata a, triangledata b) {
+      return atan2(spin(120*degree)*(a.where - start.where)) < atan2(spin(120*degree)*(b.where - start.where));
+      });
+    for(auto t: triangles) println(hlog, t.where);
+    }
+
   cgi.extra_vertices();
   init_plan();
   }

rogueviz/nilrider/levels.cpp

@@ -370,11 +370,15 @@ level heisenberg0(
   "!!!!!!!!!!!!!!!!"
   },
   8, 8,
-  f_heisenberg0
+  f_heisenberg0,
+  {
+    // the solver[0.25] result is 49:15
+    goal{0x40FFd0, "Collect all triangles in below 0:55", basic_check(55, 999)}
+    }
   );
 
 level rotwell(
-  "Deep Well", 'd', 0,
+  "Deep Well", 'd', nrlOrder,
   "Can you escape this well?",
   -7.5*dft_block, 7.5*dft_block, 8.5*dft_block, -8.5*dft_block,
   {

rogueviz/nilrider/nilrider.h

@@ -36,6 +36,7 @@ struct planpoint {
 using plan_t = vector<planpoint>;
 
 constexpr flagtype nrlPolar = Flag(1);
+constexpr flagtype nrlOrder = Flag(2);
 
 struct statue {
   transmatrix T;