From 3194d478f34a3fc49bd355800c347607d9e41c57 Mon Sep 17 00:00:00 2001
From: Jose Luis Cercos-Pita <jlcercos@gmail.com>
Date: Fri, 11 Jul 2014 17:01:04 +0200
Subject: [PATCH] Fixed box generation for small draft values

---
 src/Mod/Ship/shipHydrostatics/Tools.py | 21 +++++++++++++++------
 1 file changed, 15 insertions(+), 6 deletions(-)

diff --git a/src/Mod/Ship/shipHydrostatics/Tools.py b/src/Mod/Ship/shipHydrostatics/Tools.py
index b440f4fc4..88449d722 100644
--- a/src/Mod/Ship/shipHydrostatics/Tools.py
+++ b/src/Mod/Ship/shipHydrostatics/Tools.py
@@ -216,8 +216,11 @@ def wettedArea(shape, draft, trim):
     # Create the "sea" box
     L = xmax - xmin
     B = bbox.YMax - bbox.YMin
-    p = Vector(-1.5*L, -1.5*B, bbox.ZMin - 1.0)
-    box = Part.makeBox(3.0*L, 3.0*B, - bbox.ZMin + 1.0, p)
+    p = Vector(-1.5 * L, -1.5 * B, bbox.ZMin - 1.0)
+    try:
+        box = Part.makeBox(3.0 * L, 3.0 * B, - bbox.ZMin + 1.0, p)
+    except:
+        return 0.0
 
     for f in shape.Faces:
         try:
@@ -274,8 +277,11 @@ def FloatingArea(ship, draft, trim):
     # Create the "sea" box
     L = xmax - xmin
     B = bbox.YMax - bbox.YMin
-    p = Vector(-1.5*L, -1.5*B, bbox.ZMin - 1.0)
-    box = Part.makeBox(3.0*L, 3.0*B, - bbox.ZMin + 1.0, p)
+    p = Vector(-1.5 * L, -1.5 * B, bbox.ZMin - 1.0)
+    try:
+        box = Part.makeBox(3.0 * L, 3.0 * B, - bbox.ZMin + 1.0, p)
+    except:
+        return [area, cf]
 
     maxX = bbox.XMin / Units.Metre.Value
     minX = bbox.XMax / Units.Metre.Value
@@ -368,8 +374,11 @@ def mainFrameCoeff(ship, draft):
     # Create the "sea" box
     L = xmax - xmin
     B = bbox.YMax - bbox.YMin
-    p = Vector(-1.5*L, -1.5*B, bbox.ZMin - 1.0)
-    box = Part.makeBox(1.5*L + x, 3.0*B, - bbox.ZMin + 1.0, p)
+    p = Vector(-1.5 * L, -1.5 * B, bbox.ZMin - 1.0)
+    try:
+        box = Part.makeBox(1.5 * L, 3.0 * B, - bbox.ZMin + 1.0, p)
+    except:
+        return cm
 
     maxY = bbox.YMin / Units.Metre.Value
     minY = bbox.YMax / Units.Metre.Value