From: bangerth <bangerth@0785d39b-7218-0410-832d-ea1e28bc413d>
Date: Fri, 24 Aug 2007 16:16:41 +0000 (+0000)
Subject: Truncate very small values to reduce hassle with round-off
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ac565f2f717a33b134951c4820c1aa3a32881268;p=dealii-svn.git

Truncate very small values to reduce hassle with round-off

git-svn-id: https://svn.dealii.org/trunk@15037 0785d39b-7218-0410-832d-ea1e28bc413d
---

diff --git a/tests/base/functions_01.cc b/tests/base/functions_01.cc
index e60e683734..ed1298b327 100644
--- a/tests/base/functions_01.cc
+++ b/tests/base/functions_01.cc
@@ -106,7 +106,14 @@ check_function(const Functions::FlowFunction<dim>& f,
   for (unsigned int i=0;i<values.size();++i)
     for (unsigned int j=0;j<values[i].size();++j)
       {
-	patches[0].data(j, i) = values[i](j);
+					 // generate data, but
+					 // truncate too small values
+					 // to avoid output that
+					 // depends on round-off
+	if (std::fabs (values[i](j)) > 1e-10)
+	  patches[0].data(j, i) = values[i](j);
+	else
+	  patches[0].data(j, i) = 0;
 	Assert (values[i](j) == values2[j][i], ExcInternalError());
       }
   
diff --git a/tests/base/functions_01/cmp/generic b/tests/base/functions_01/cmp/generic
index 5cd8b6eca2..1ff91be864 100644
--- a/tests/base/functions_01/cmp/generic
+++ b/tests/base/functions_01/cmp/generic
@@ -10,35 +10,35 @@ DEAL::Laplacians 0.719980
 # For a description of the GNUPLOT format see the GNUPLOT manual.
 #
 # <x> <y> <comp> <comp> <comp> 
--1.00000 -1.00000 0.00000 0.00000 3.74940e-33 
--0.500000 -1.00000 -3.06162e-17 1.87470e-33 3.06162e-17 
-0.00000 -1.00000 -6.12323e-17 0.00000 0.00000 
-0.500000 -1.00000 -3.06162e-17 -1.87470e-33 -3.06162e-17 
-1.00000 -1.00000 0.00000 0.00000 -3.74940e-33 
+-1.00000 -1.00000 0.00000 0.00000 0.00000 
+-0.500000 -1.00000 0.00000 0.00000 0.00000 
+0.00000 -1.00000 0.00000 0.00000 0.00000 
+0.500000 -1.00000 0.00000 0.00000 0.00000 
+1.00000 -1.00000 0.00000 0.00000 0.00000 
 
--1.00000 -0.500000 -1.87470e-33 3.06162e-17 3.06162e-17 
+-1.00000 -0.500000 0.00000 0.00000 0.00000 
 -0.500000 -0.500000 -0.250000 0.250000 0.250000 
 0.00000 -0.500000 -0.500000 0.00000 0.00000 
 0.500000 -0.500000 -0.250000 -0.250000 -0.250000 
-1.00000 -0.500000 -1.87470e-33 -3.06162e-17 -3.06162e-17 
+1.00000 -0.500000 0.00000 0.00000 0.00000 
 
--1.00000 0.00000 0.00000 6.12323e-17 0.00000 
+-1.00000 0.00000 0.00000 0.00000 0.00000 
 -0.500000 0.00000 0.00000 0.500000 0.00000 
 0.00000 0.00000 0.00000 0.00000 0.00000 
 0.500000 0.00000 0.00000 -0.500000 0.00000 
-1.00000 0.00000 0.00000 -6.12323e-17 0.00000 
+1.00000 0.00000 0.00000 0.00000 0.00000 
 
--1.00000 0.500000 1.87470e-33 3.06162e-17 -3.06162e-17 
+-1.00000 0.500000 0.00000 0.00000 0.00000 
 -0.500000 0.500000 0.250000 0.250000 -0.250000 
 0.00000 0.500000 0.500000 0.00000 0.00000 
 0.500000 0.500000 0.250000 -0.250000 0.250000 
-1.00000 0.500000 1.87470e-33 -3.06162e-17 3.06162e-17 
+1.00000 0.500000 0.00000 0.00000 0.00000 
 
--1.00000 1.00000 0.00000 0.00000 -3.74940e-33 
--0.500000 1.00000 3.06162e-17 1.87470e-33 -3.06162e-17 
-0.00000 1.00000 6.12323e-17 0.00000 0.00000 
-0.500000 1.00000 3.06162e-17 -1.87470e-33 3.06162e-17 
-1.00000 1.00000 0.00000 0.00000 3.74940e-33 
+-1.00000 1.00000 0.00000 0.00000 0.00000 
+-0.500000 1.00000 0.00000 0.00000 0.00000 
+0.00000 1.00000 0.00000 0.00000 0.00000 
+0.500000 1.00000 0.00000 0.00000 0.00000 
+1.00000 1.00000 0.00000 0.00000 0.00000 
 
 
 DEAL:: Functions::StokesCosine<3>
@@ -241,129 +241,129 @@ attribute "element type" string "cubes"
 attribute "ref" string "positions"
 object "data" class array type float rank 1 shape 4 items 125 data follows
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-	0.00000	1.87470e-33	0.00000	-1.87470e-33
-	1.53081e-17	1.53081e-17	-1.87470e-33	-1.53081e-17
-	3.06162e-17	0.00000	0.00000	0.00000
-	1.53081e-17	-1.53081e-17	1.87470e-33	1.53081e-17
-	0.00000	-1.87470e-33	0.00000	1.87470e-33
-	0.00000	3.74940e-33	0.00000	0.00000
-	0.00000	3.06162e-17	0.00000	0.00000
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-	-3.06162e-17	0.00000	0.00000	0.00000
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 attribute "dep" string "positions"
 object "deal data" class field
diff --git a/tests/base/functions_01/cmp/i686-pc-linux-gnu+gcc3.3 b/tests/base/functions_01/cmp/i686-pc-linux-gnu+gcc3.3
deleted file mode 100644
index e2ed5efa87..0000000000
--- a/tests/base/functions_01/cmp/i686-pc-linux-gnu+gcc3.3
+++ /dev/null
@@ -1,485 +0,0 @@
-object "vertices" class array type float rank 1 shape 2 items 25 data follows
--1	-1	
--0.5	-1	
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--0.5	0.5	
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-attribute "element type" string "quads"
-attribute "ref" string "positions"
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-attribute "dep" string "positions"
-object "deal data" class field
-component "positions" value "vertices"
-component "connections" value "cells"
-component "data" value "data"
-attribute 
-end
-object "vertices" class array type float rank 1 shape 2 items 25 data follows
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