From e0582a8bff4cd38b1feb4acfa82806d90f4fbbd9 Mon Sep 17 00:00:00 2001
From: yuniersoad <yunier.soad@gmail.com>
Date: Tue, 14 May 2013 19:38:40 +0000
Subject: [PATCH] Fixing conversion error in ENgetnodevalue EN_TANKDIAM

The Tank.A(area) is calculated as:
 Tank[j].A = PI*SQR(Tank[j].A/Ucf[ELEV])/4.0; //diameter is stored in Tank[j].A
so the right equation to get the diameter back is  sqrt(4.0/PI*Tank[index-Njuncs].A)*Ucf[ELEV];
---
 src/epanet.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/epanet.c b/src/epanet.c
index 34e8d53..69095a4 100755
--- a/src/epanet.c
+++ b/src/epanet.c
@@ -1460,7 +1460,7 @@ int DLLEXPORT ENgetnodevalue(int index, int code, float *value)
          v = 0.0;
          if ( index > Njuncs )
          {
-            v = 4.0/PI*sqrt(Tank[index-Njuncs].A)*Ucf[ELEV];
+            v = sqrt(4.0/PI*Tank[index-Njuncs].A)*Ucf[ELEV];
          }
          break;