Squashed 'kiwi/' content from commit 268028e

git-subtree-dir: kiwi
git-subtree-split: 268028ee4a694dcd89e4b1e683bf2f9ac48c08d9

kiwi/strength.h

@@ -0,0 +1,44 @@
+/*-----------------------------------------------------------------------------
+| Copyright (c) 2013-2017, Nucleic Development Team.
+|
+| Distributed under the terms of the Modified BSD License.
+|
+| The full license is in the file LICENSE, distributed with this software.
+|----------------------------------------------------------------------------*/
+#pragma once
+#include <algorithm>
+
+
+namespace kiwi
+{
+
+namespace strength
+{
+
+inline double create( double a, double b, double c, double w = 1.0 )
+{
+	double result = 0.0;
+	result += std::max( 0.0, std::min( 1000.0, a * w ) ) * 1000000.0;
+	result += std::max( 0.0, std::min( 1000.0, b * w ) ) * 1000.0;
+	result += std::max( 0.0, std::min( 1000.0, c * w ) );
+	return result;
+}
+
+
+const double required = create( 1000.0, 1000.0, 1000.0 );
+
+const double strong = create( 1.0, 0.0, 0.0 );
+
+const double medium = create( 0.0, 1.0, 0.0 );
+
+const double weak = create( 0.0, 0.0, 1.0 );
+
+
+inline double clip( double value )
+{
+	return std::max( 0.0, std::min( required, value ) );
+}
+
+} // namespace strength
+
+} // namespace kiwi