more updates

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

diff --git a/synfig-core/trunk/src/synfig/valuenode_segcalctangent.cpp b/synfig-core/trunk/src/synfig/valuenode_segcalctangent.cpp
new file mode 100644 (file)
index 0000000..ba7844f
--- /dev/null
+++ b/synfig-core/trunk/src/synfig/valuenode_segcalctangent.cpp
@@ -0,0 +1,186 @@
+/* === S I N F G =========================================================== */
+/*!    \file valuenode_segcalctangent.cpp
+**     \brief Template File
+**
+**     $Id: valuenode_segcalctangent.cpp,v 1.1.1.1 2005/01/04 01:23:15 darco Exp $
+**
+**     \legal
+**     Copyright (c) 2002 Robert B. Quattlebaum Jr.
+**
+**     This software and associated documentation
+**     are CONFIDENTIAL and PROPRIETARY property of
+**     the above-mentioned copyright holder.
+**
+**     You may not copy, print, publish, or in any
+**     other way distribute this software without
+**     a prior written agreement with
+**     the copyright holder.
+**     \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_segcalctangent.h"
+#include "valuenode_const.h"
+#include "valuenode_composite.h"
+#include "general.h"
+#include "exception.h"
+#include <ETL/hermite>
+#include <ETL/calculus>
+#include "segment.h"
+
+#endif
+
+/* === U S I N G =========================================================== */
+
+using namespace std;
+using namespace etl;
+using namespace sinfg;
+
+/* === 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_SegCalcTangent::ValueNode_SegCalcTangent(const ValueBase::Type &x):
+       LinkableValueNode(x)
+{
+       if(x!=ValueBase::TYPE_VECTOR)
+               throw Exception::BadType(ValueBase::type_name(x));
+       
+       segment_=ValueNode_Composite::create(ValueBase::TYPE_SEGMENT);
+       amount_=ValueNode_Const::create(Real(0.5));
+}
+
+ValueNode_SegCalcTangent*
+ValueNode_SegCalcTangent::create(const ValueBase &x)
+{
+       return new ValueNode_SegCalcTangent(x.get_type());
+}
+
+ValueNode_SegCalcTangent::~ValueNode_SegCalcTangent()
+{
+       unlink_all();
+}
+
+ValueBase
+ValueNode_SegCalcTangent::operator()(Time t)const
+{
+       Segment segment((*segment_)(t).get(Segment()));
+
+       etl::hermite<Vector> curve(segment.p1,segment.p2,segment.t1,segment.t2);
+       etl::derivative< etl::hermite<Vector> > deriv(curve);
+       
+#ifdef ETL_FIXED_DERIVATIVE
+       return deriv((*amount_)(t).get(Real()))*(0.5);
+#else
+       return deriv((*amount_)(t).get(Real()))*(-0.5);
+#endif
+       
+}
+
+
+String
+ValueNode_SegCalcTangent::get_name()const
+{
+       return "segcalctangent";
+}
+
+String
+ValueNode_SegCalcTangent::get_local_name()const
+{
+       return _("SegCalcTangent");
+}
+               
+bool
+ValueNode_SegCalcTangent::check_type(ValueBase::Type type)
+{
+       return type==ValueBase::TYPE_VECTOR;
+}
+
+bool
+ValueNode_SegCalcTangent::set_link_vfunc(int i,ValueNode::Handle x)
+{
+       assert(i==0 || i==1);
+       if(i==0)
+       {
+               segment_=x;
+               signal_child_changed()(i);signal_value_changed()();
+               return true;
+       }
+       if(i==1)
+       {
+               amount_=x;
+               signal_child_changed()(i);signal_value_changed()();
+               return true;
+       }
+       return false;
+}
+
+ValueNode::LooseHandle
+ValueNode_SegCalcTangent::get_link_vfunc(int i)const
+{
+       assert(i==0 || i==1);
+       if(i==0)
+               return segment_;
+       if(i==1)
+               return amount_;
+
+       return 0;
+}
+
+int
+ValueNode_SegCalcTangent::link_count()const
+{
+       return 2;
+}
+
+String
+ValueNode_SegCalcTangent::link_name(int i)const
+{
+       assert(i==0 || i==1);
+       if(i==0)
+               return "segment";
+       if(i==1)
+               return "amount";
+       return String();
+}
+
+String
+ValueNode_SegCalcTangent::link_local_name(int i)const
+{
+       assert(i==0 || i==1);
+       if(i==0)
+               return _("Segment");
+       if(i==1)
+               return _("Amount");
+       return String();
+}
+
+int
+ValueNode_SegCalcTangent::get_link_index_from_name(const String &name)const
+{
+       if(name=="segment")
+               return 0;
+       if(name=="amount")
+               return 1;
+       
+       throw Exception::BadLinkName(name);
+}
+
+LinkableValueNode*
+ValueNode_SegCalcTangent::create_new()const
+{
+       return new ValueNode_SegCalcTangent(ValueBase::TYPE_VECTOR);
+}