From 4f4cf365eae07e04298459bf8f9e27ad0cfcc834 Mon Sep 17 00:00:00 2001
From: Jaron Kent-Dobias <jaron@kent-dobias.com>
Date: Wed, 5 Dec 2018 19:16:28 -0500
Subject: now takes Lx and Ly for anisotropic fracture

---
 lib/src/graph.cpp | 29 +++++++++++++++--------------
 1 file changed, 15 insertions(+), 14 deletions(-)

(limited to 'lib/src/graph.cpp')

diff --git a/lib/src/graph.cpp b/lib/src/graph.cpp
index e5f374e..f2e8065 100644
--- a/lib/src/graph.cpp
+++ b/lib/src/graph.cpp
@@ -1,10 +1,11 @@
 
 #include "graph.hpp"
 
-graph::graph(unsigned int L) {
-  double dx = 1.0 / L;
-  unsigned int nv = 2 * pow(L / 2, 2);
-  unsigned int ne = pow(L, 2);
+graph::graph(unsigned int Nx, unsigned int Ny) {
+  L = {(double)Nx, (double)Ny};
+
+  unsigned int ne = Nx * Ny;
+  unsigned int nv = ne / 2;
 
   vertices.resize(nv);
   edges.reserve(ne);
@@ -13,22 +14,22 @@ graph::graph(unsigned int L) {
   dual_edges.reserve(ne);
 
   for (unsigned int i = 0; i < nv; i++) {
-    vertices[i].r.x = dx * ((1 + i / (L / 2)) % 2 + 2 * (i % (L / 2)));
-    vertices[i].r.y = dx * (i / (L / 2));
+    vertices[i].r.x = (double)((1 + i / (Nx / 2)) % 2 + 2 * (i % (Nx / 2)));
+    vertices[i].r.y = (double)(i / (Nx / 2));
 
-    dual_vertices[i].r.x = dx * ((i / (L / 2)) % 2 + 2 * (i % (L / 2)));
-    dual_vertices[i].r.y = dx * (i / (L / 2));
+    dual_vertices[i].r.x = (double)((i / (Nx / 2)) % 2 + 2 * (i % (Nx / 2)));
+    dual_vertices[i].r.y = (double)(i / (Nx / 2));
   }
 
-  for (unsigned int x = 0; x < L; x++) {
-    for (unsigned int y = 0; y < L; y++) {
-      unsigned int v1 = (L * x) / 2 + ((y + x % 2) / 2) % (L / 2);
-      unsigned int v2 = ((L * (x + 1)) / 2 + ((y + (x + 1) % 2) / 2) % (L / 2)) % nv;
+  for (unsigned int x = 0; x < Ny; x++) {
+    for (unsigned int y = 0; y < Nx; y++) {
+      unsigned int v1 = (Nx * x) / 2 + ((y + x % 2) / 2) % (Nx / 2);
+      unsigned int v2 = ((Nx * (x + 1)) / 2 + ((y + (x + 1) % 2) / 2) % (Nx / 2)) % nv;
 
       edges.push_back({v1, v2});
 
-      unsigned int dv1 = (L * x) / 2 + ((y + (x + 1) % 2) / 2) % (L / 2);
-      unsigned int dv2 = ((L * (x + 1)) / 2 + ((y + x % 2) / 2) % (L / 2)) % nv;
+      unsigned int dv1 = (Nx * x) / 2 + ((y + (x + 1) % 2) / 2) % (Nx / 2);
+      unsigned int dv2 = ((Nx * (x + 1)) / 2 + ((y + x % 2) / 2) % (Nx / 2)) % nv;
 
       dual_edges.push_back({dv1, dv2});
     }
-- 
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