From: wolf <wolf@0785d39b-7218-0410-832d-ea1e28bc413d>
Date: Fri, 24 Aug 2001 14:34:18 +0000 (+0000)
Subject: reverse_grey_scale_color_function
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9bad4969ce2ef3170e77f3886503823952cf2d88;p=dealii-svn.git

reverse_grey_scale_color_function


git-svn-id: https://svn.dealii.org/trunk@4911 0785d39b-7218-0410-832d-ea1e28bc413d
---

diff --git a/deal.II/base/include/base/data_out_base.h b/deal.II/base/include/base/data_out_base.h
index 1d9ff22c20..32840acbdc 100644
--- a/deal.II/base/include/base/data_out_base.h
+++ b/deal.II/base/include/base/data_out_base.h
@@ -890,6 +890,24 @@ class DataOutBase
 						    const double min_value,
 						    const double max_value);
 	
+					 /**
+					  * This is one more
+					  * alternative color function
+					  * producing a grey scale
+					  * between white (lowest
+					  * values) and black (highest
+					  * values), i.e. the scale is
+					  * reversed to the previous
+					  * one. You may use it by
+					  * setting the
+					  * @p{color_function}
+					  * variable to the address of
+					  * this function.
+					  */
+	static RgbValues reverse_grey_scale_color_function (const double value,
+							    const double min_value,
+							    const double max_value);
+	
 					 /**
 					  * Constructor.
 					  */
diff --git a/deal.II/base/source/data_out_base.all_dimensions.cc b/deal.II/base/source/data_out_base.all_dimensions.cc
index 395f2970fe..4604412c0b 100644
--- a/deal.II/base/source/data_out_base.all_dimensions.cc
+++ b/deal.II/base/source/data_out_base.all_dimensions.cc
@@ -222,6 +222,7 @@ DataOutBase::EpsFlags::default_color_function (const double x,
 };
 
 
+
 DataOutBase::EpsFlags::RgbValues
 DataOutBase::EpsFlags::grey_scale_color_function (const double x,
 						  const double xmin,
@@ -235,6 +236,19 @@ DataOutBase::EpsFlags::grey_scale_color_function (const double x,
 
 
 
+DataOutBase::EpsFlags::RgbValues
+DataOutBase::EpsFlags::reverse_grey_scale_color_function (const double x,
+							  const double xmin,
+							  const double xmax)
+{
+  DataOutBase::EpsFlags::RgbValues rgb_values;
+  rgb_values.red = rgb_values.blue = rgb_values.green
+		 = 1-(x-xmin)/(xmax-xmin);
+  return rgb_values;
+};
+
+
+
 bool DataOutBase::EpsCell2d::operator < (const EpsCell2d &e) const
 {
 				   // note the "wrong" order in
diff --git a/deal.II/doc/news/2001/c-3-1.html b/deal.II/doc/news/2001/c-3-1.html
index ef7d213ef1..f4963f8afd 100644
--- a/deal.II/doc/news/2001/c-3-1.html
+++ b/deal.II/doc/news/2001/c-3-1.html
@@ -158,6 +158,12 @@ documentation, etc</a>.
 <h3>base</h3>
 
 <ol>
+  <li> <p> 
+       New: Color function <code
+       class="member">DataOutBase::EpsFlags::reverse_grey_scale_color_function</code>.
+       <br>
+       (WB 2001/08/24)
+
   <li> <p> 
        New: Function <code class="member">QProjector::project_to_child</code>
        generates quadrature formulae which act on the area which a
@@ -200,7 +206,6 @@ documentation, etc</a>.
        <br>
        (GK 2001/05/17)
 
-
   <li> <p>
        New: There is now a new <code
        class="class">AutoDerivativeFunction</code> class that