Added new convert type "Reciprocal" to convert x to 1/x.

[synfig.git] / synfig-core / trunk / src / synfig / valuenode_reciprocal.cpp

diff --git a/synfig-core/trunk/src/synfig/valuenode_reciprocal.cpp b/synfig-core/trunk/src/synfig/valuenode_reciprocal.cpp
new file mode 100644 (file)
index 0000000..4af2051
--- /dev/null
+++ b/synfig-core/trunk/src/synfig/valuenode_reciprocal.cpp
@@ -0,0 +1,179 @@
+/* === S Y N F I G ========================================================= */
+/*!    \file valuenode_reciprocal.cpp
+**     \brief Implementation of the "Reciprocal" valuenode conversion.
+**
+**     $Id$
+**
+**     \legal
+**     Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
+**     Copyright (c) 2007 Chris Moore
+**
+**     This package is free software; you can redistribute it and/or
+**     modify it under the terms of the GNU General Public License as
+**     published by the Free Software Foundation; either version 2 of
+**     the License, or (at your option) any later version.
+**
+**     This package 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
+**     General Public License for more details.
+**     \endlegal
+*/
+/* ========================================================================= */
+
+/* === H E A D E R S ======================================================= */
+
+#ifdef USING_PCH
+#      include "pch.h"
+#else
+#ifdef HAVE_CONFIG_H
+#      include <config.h>
+#endif
+
+#include "valuenode_reciprocal.h"
+#include "valuenode_const.h"
+#include "general.h"
+
+#endif
+
+/* === U S I N G =========================================================== */
+
+using namespace std;
+using namespace etl;
+using namespace synfig;
+
+/* === M A C R O S ========================================================= */
+
+/* === G L O B A L S ======================================================= */
+
+/* === P R O C E D U R E S ================================================= */
+
+/* === M E T H O D S ======================================================= */
+
+ValueNode_Reciprocal::ValueNode_Reciprocal(const ValueBase::Type &x):
+       LinkableValueNode(x)
+{
+}
+
+ValueNode_Reciprocal::ValueNode_Reciprocal(const ValueNode::Handle &x):
+       LinkableValueNode(x->get_type())
+{
+       set_link("link", x);
+       set_link("epsilon",  ValueNode_Const::create(Real(0.000001)));
+       set_link("infinite", ValueNode_Const::create(Real(999999.0)));
+}
+
+ValueNode_Reciprocal*
+ValueNode_Reciprocal::create(const ValueBase &x)
+{
+       return new ValueNode_Reciprocal(ValueNode_Const::create(x));
+}
+
+LinkableValueNode*
+ValueNode_Reciprocal::create_new()const
+{
+       return new ValueNode_Reciprocal(get_type());
+}
+
+ValueNode_Reciprocal::~ValueNode_Reciprocal()
+{
+       unlink_all();
+}
+
+bool
+ValueNode_Reciprocal::set_link_vfunc(int i,ValueNode::Handle x)
+{
+       assert(i >= 0 && i < link_count());
+       switch(i)
+       {
+       case 0:  link_     = x; break;
+       case 1:  epsilon_  = x; break;
+       case 2:  infinite_ = x; break;
+       default: return false;
+       }
+
+       signal_child_changed()(i);
+       signal_value_changed()();
+       return true;
+}
+
+ValueNode::LooseHandle
+ValueNode_Reciprocal::get_link_vfunc(int i)const
+{
+       assert(i >= 0 && i < link_count());
+       if(i==0) return link_;
+       if(i==1) return epsilon_;
+       if(i==2) return infinite_;
+
+       return 0;
+}
+
+int
+ValueNode_Reciprocal::link_count()const
+{
+       return 3;
+}
+
+String
+ValueNode_Reciprocal::link_local_name(int i)const
+{
+       assert(i >= 0 && i < link_count());
+       if(i==0) return _("Link");
+       if(i==1) return _("Epsilon");
+       if(i==2) return _("Infinite");
+       return String();
+}
+
+String
+ValueNode_Reciprocal::link_name(int i)const
+{
+       assert(i >= 0 && i < link_count());
+       if(i==0) return "link";
+       if(i==1) return "epsilon";
+       if(i==2) return "infinite";
+       return String();
+}
+
+int
+ValueNode_Reciprocal::get_link_index_from_name(const String &name)const
+{
+       if(name=="link")     return 0;
+       if(name=="epsilon")  return 1;
+       if(name=="infinite") return 2;
+
+       throw Exception::BadLinkName(name);
+}
+
+ValueBase
+ValueNode_Reciprocal::operator()(Time t)const
+{
+       Real link     = (*link_)    (t).get(Real());
+       Real epsilon  = (*epsilon_) (t).get(Real());
+       Real infinite = (*infinite_)(t).get(Real());
+
+       if (abs(link) < epsilon)
+               if (link < 0)
+                       return -infinite;
+               else
+                       return infinite;
+       else
+               return 1.0f / link;
+}
+
+String
+ValueNode_Reciprocal::get_name()const
+{
+       return "reciprocal";
+}
+
+String
+ValueNode_Reciprocal::get_local_name()const
+{
+       return _("Reciprocal");
+}
+
+bool
+ValueNode_Reciprocal::check_type(ValueBase::Type type)
+{
+       return type==ValueBase::TYPE_REAL;
+}