Added a new valuenode type for real values: 'Exponent'. Given a real value, it sets...

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

diff --git a/synfig-core/trunk/src/synfig/valuenode_exp.cpp b/synfig-core/trunk/src/synfig/valuenode_exp.cpp
new file mode 100644 (file)
index 0000000..b553b1b
--- /dev/null
+++ b/synfig-core/trunk/src/synfig/valuenode_exp.cpp
@@ -0,0 +1,178 @@
+/* === S Y N F I G ========================================================= */
+/*!    \file valuenode_exp.cpp
+**     \brief Template File
+**
+**     $Id$
+**
+**     \legal
+**     Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
+**
+**     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_exp.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_Exp::ValueNode_Exp(const ValueBase &value):
+       LinkableValueNode(value.get_type())
+{
+       switch(value.get_type())
+       {
+       case ValueBase::TYPE_REAL:
+               set_link("exp",ValueNode_Const::create(Real(1)));
+               set_link("scale",ValueNode_Const::create(value.get(Real())));
+               break;
+       default:
+               throw Exception::BadType(ValueBase::type_name(value.get_type()));
+       }
+
+       DCAST_HACK_ENABLE();
+}
+
+LinkableValueNode*
+ValueNode_Exp::create_new()const
+{
+       return new ValueNode_Exp(get_type());
+}
+
+ValueNode_Exp*
+ValueNode_Exp::create(const ValueBase &x)
+{
+       return new ValueNode_Exp(x);
+}
+
+ValueNode_Exp::~ValueNode_Exp()
+{
+       unlink_all();
+}
+
+ValueBase
+ValueNode_Exp::operator()(Time t)const
+{
+       return (exp((*exp_)(t).get(Real())) *
+                       (*scale_)(t).get(Real()));
+}
+
+String
+ValueNode_Exp::get_name()const
+{
+       return "exp";
+}
+
+String
+ValueNode_Exp::get_local_name()const
+{
+       return _("Exponential");
+}
+
+bool
+ValueNode_Exp::set_link_vfunc(int i,ValueNode::Handle x)
+{
+       assert(i==0 || i==1);
+       if(i==0)
+       {
+               exp_=x;
+               signal_child_changed()(i);signal_value_changed()();
+               return true;
+       }
+       if(i==1)
+       {
+               scale_=x;
+               signal_child_changed()(i);signal_value_changed()();
+               return true;
+       }
+       return false;
+}
+
+ValueNode::LooseHandle
+ValueNode_Exp::get_link_vfunc(int i)const
+{
+       assert(i==0 || i==1);
+       if(i==0)
+               return exp_;
+       if(i==1)
+               return scale_;
+
+       return 0;
+}
+
+int
+ValueNode_Exp::link_count()const
+{
+       return 2;
+}
+
+String
+ValueNode_Exp::link_name(int i)const
+{
+       assert(i==0 || i==1);
+       if(i==0)
+               return "exp";
+       if(i==1)
+               return "scale";
+       return String();
+}
+
+String
+ValueNode_Exp::link_local_name(int i)const
+{
+       assert(i==0 || i==1);
+       if(i==0)
+               return _("Exponent");
+       if(i==1)
+               return _("Scale");
+       return String();
+}
+
+int
+ValueNode_Exp::get_link_index_from_name(const String &name)const
+{
+       if(name=="exp")
+               return 0;
+       if(name=="scale")
+               return 1;
+
+       throw Exception::BadLinkName(name);
+}
+
+bool
+ValueNode_Exp::check_type(ValueBase::Type type)
+{
+       return type==ValueBase::TYPE_REAL;
+}