INTEGRATION: CWS presentationengine01 (1.1.2); FILE ADDED

2004/11/01 22:24:39 thb 1.1.2.1: #110496# Initial revision

1 files changed, 95 insertions, 0 deletions

diff --git a/slideshow/source/inc/lerp.hxx b/slideshow/source/inc/lerp.hxx
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+/*************************************************************************
+ *
+ *  $RCSfile: lerp.hxx,v $
+ *
+ *  $Revision: 1.2 $
+ *
+ *  last change: $Author: rt $ $Date: 2004-11-26 19:18:01 $
+ *
+ *  The Contents of this file are made available subject to the terms of
+ *  either of the following licenses
+ *
+ *         - GNU Lesser General Public License Version 2.1
+ *         - Sun Industry Standards Source License Version 1.1
+ *
+ *  Sun Microsystems Inc., October, 2000
+ *
+ *  GNU Lesser General Public License Version 2.1
+ *  =============================================
+ *  Copyright 2000 by Sun Microsystems, Inc.
+ *  901 San Antonio Road, Palo Alto, CA 94303, USA
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License version 2.1, as published by the Free Software Foundation.
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ *  MA  02111-1307  USA
+ *
+ *
+ *  Sun Industry Standards Source License Version 1.1
+ *  =================================================
+ *  The contents of this file are subject to the Sun Industry Standards
+ *  Source License Version 1.1 (the "License"); You may not use this file
+ *  except in compliance with the License. You may obtain a copy of the
+ *  License at http://www.openoffice.org/license.html.
+ *
+ *  Software provided under this License is provided on an "AS IS" basis,
+ *  WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
+ *  WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
+ *  MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
+ *  See the License for the specific provisions governing your rights and
+ *  obligations concerning the Software.
+ *
+ *  The Initial Developer of the Original Code is: Sun Microsystems, Inc.
+ *
+ *  Copyright: 2000 by Sun Microsystems, Inc.
+ *
+ *  All Rights Reserved.
+ *
+ *  Contributor(s): _______________________________________
+ *
+ *
+ ************************************************************************/
+
+#ifndef _SLIDESHOW_LERP_HXX
+#define _SLIDESHOW_LERP_HXX
+
+#ifndef _SAL_TYPES_H_
+#include <sal/types.h>
+#endif
+
+namespace presentation
+{
+    namespace internal
+    {
+
+        /** Generic linear interpolator
+
+            @tpl ValueType
+            Must have operator+ and operator* defined, and should
+            have value semantics.
+
+            @param t
+            As usual, t must be in the [0,1] range
+        */
+        template< typename ValueType > ValueType lerp( const ValueType&     rFrom,
+                                                       const ValueType&     rTo,
+                                                       double               t )
+        {
+            // This is only to suppress a double->int warning. All other
+            // types should be okay here.
+            return static_cast<ValueType>( (1.0-t)*rFrom + t*rTo );
+        }
+
+    }
+}
+
+#endif /* _SLIDESHOW_LERP_HXX */