inforder basics

inforder.cpp

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+// Hyperbolic Rogue -- infinite-order tessellations
+// Copyright (C) 2011-2019 Zeno Rogue, see 'hyper.cpp' for details
+
+/** \file inforder3.cpp
+ *  \brief infinite-order tessellations
+ *
+ *  very simple
+ */
+
+#include "hyper.h"
+
+namespace hr {
+
+EX namespace inforder {
+
+  struct hrmap_inforder : hrmap_hyperbolic {
+
+    heptagon *create_step(heptagon *h, int direction) {
+      auto h1 = tailored_alloc<heptagon> (S7);
+      bool par = h->s == hsA && direction == 0;
+      h->c.connect(direction, h1, par ? 1 + hrand(2) : 0, false);
+
+      h1->alt = NULL;
+      h1->s = hsA;
+      h1->cdata = NULL;
+      h1->distance = h->distance + (par ? -1 : 1);
+      h1->c7 = newCell(S7, h1);
+
+      return h1;
+      }
+
+    };
+  
+  EX hrmap* new_map() { return new hrmap_inforder; }  
+  
+  EX int celldistance(cell *c1, cell *c2) {
+    int d = 0;
+    while(true) {
+      if(c1 == c2) return d;
+      else if(c1->master->distance >= c2->master->distance) c1 = c1->move(0), d++;
+      else c2 = c2->move(0), d++;
+      }
+    }
+  
+  EX }
+
+
+}