--- /dev/null
+/* === S Y N F I G ========================================================= */
+/*! \file valuenode_timedswap.cpp
+** \brief Template File
+**
+** $Id: valuenode_timedswap.cpp,v 1.1.1.1 2005/01/04 01:23:15 darco Exp $
+**
+** \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 "general.h"
+#include "valuenode_timedswap.h"
+#include "valuenode_const.h"
+#include <stdexcept>
+#include "color.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_TimedSwap::ValueNode_TimedSwap(ValueBase::Type type):
+ LinkableValueNode(type)
+{
+ set_before(ValueNode_Const::create(type));
+ set_after(ValueNode_Const::create(type));
+ set_swap_time_real(1.0);
+ set_swap_length_real(1.0);
+
+ DCAST_HACK_ENABLE();
+}
+
+ValueNode_TimedSwap*
+ValueNode_TimedSwap::create(const ValueBase& x)
+{
+ return new ValueNode_TimedSwap(x.get_type());
+}
+
+
+LinkableValueNode*
+ValueNode_TimedSwap::create_new()const
+{
+ return new ValueNode_TimedSwap(get_type());
+}
+
+
+synfig::ValueNode_TimedSwap::~ValueNode_TimedSwap()
+{
+ unlink_all();
+}
+
+
+
+bool
+ValueNode_TimedSwap::set_before(const ValueNode::Handle &x)
+{
+ if(!x || x->get_type()!=get_type()
+ && !PlaceholderValueNode::Handle::cast_dynamic(x))
+ return false;
+
+ before=x;
+
+ return true;
+}
+
+ValueNode::Handle
+ValueNode_TimedSwap::get_before()const
+{
+ return before;
+}
+
+
+bool
+ValueNode_TimedSwap::set_after(const ValueNode::Handle &x)
+{
+ if(!x || x->get_type()!=get_type()
+ && !PlaceholderValueNode::Handle::cast_dynamic(x))
+ return false;
+
+ after=x;
+
+ return true;
+}
+
+ValueNode::Handle
+ValueNode_TimedSwap::get_after()const
+{
+ return after;
+}
+
+
+void
+ValueNode_TimedSwap::set_swap_time_real(Time x)
+{
+ set_swap_time(ValueNode_Const::create(x));
+}
+
+bool
+ValueNode_TimedSwap::set_swap_time(const ValueNode::Handle &x)
+{
+ if(!x
+ || !ValueBase(ValueBase::TYPE_TIME).same_as(x->get_type())
+ && !PlaceholderValueNode::Handle::cast_dynamic(x)
+ )
+ return false;
+ swap_time=x;
+ return true;
+}
+
+ValueNode::Handle
+ValueNode_TimedSwap::get_swap_time()const
+{
+ return swap_time;
+}
+
+void
+ValueNode_TimedSwap::set_swap_length_real(Time x)
+{
+ set_swap_length(ValueNode_Const::create(x));
+}
+
+bool
+ValueNode_TimedSwap::set_swap_length(const ValueNode::Handle &x)
+{
+ if(!x || (
+ !ValueBase(ValueBase::TYPE_TIME).same_as(x->get_type())
+ && !PlaceholderValueNode::Handle::cast_dynamic(x)
+ )
+ )
+ return false;
+ swap_length=x;
+ return true;
+}
+
+ValueNode::Handle
+ValueNode_TimedSwap::get_swap_length()const
+{
+ return swap_length;
+}
+
+
+
+synfig::ValueBase
+synfig::ValueNode_TimedSwap::operator()(Time t)const
+{
+ Time swptime=(*swap_time)(t).get(Time());
+ Time swplength=(*swap_length)(t).get(Time());
+
+ if(t>swptime)
+ return (*after)(t);
+
+ if(t<=swptime && t>swptime-swplength)
+ {
+ Real amount=(swptime-t)/swplength;
+ // if amount==0.0, then we are after
+ // if amount==1.0, then we are before
+
+ switch(get_type())
+ {
+ case ValueBase::TYPE_REAL:
+ {
+ Real a=(*after)(t).get(Real());
+ Real b=(*before)(t).get(Real());
+ return (b-a)*amount+a;
+ }
+ case ValueBase::TYPE_VECTOR:
+ {
+ Vector a=(*after)(t).get(Vector());
+ Vector b=(*before)(t).get(Vector());
+ return (b-a)*amount+a;
+ }
+ case ValueBase::TYPE_ANGLE:
+ {
+ Angle a=(*after)(t).get(Angle());
+ Angle b=(*before)(t).get(Angle());
+ return (b-a)*amount+a;
+ }
+ case ValueBase::TYPE_COLOR:
+ {
+ Color a=(*after)(t).get(Color());
+ Color b=(*before)(t).get(Color());
+ // note: Shouldn't this use a straight blend?
+ return (b-a)*amount+a;
+ }
+ case ValueBase::TYPE_INTEGER:
+ {
+ float a=(float)(*after)(t).get(int());
+ float b=(float)(*before)(t).get(int());
+ return static_cast<int>((b-a)*amount+a+0.5f);
+ }
+ default:
+ break;
+ }
+ }
+
+
+ /*! \todo this should interpolate from
+ ** before to after over the period defined
+ ** by swap_length */
+
+ return (*before)(t);
+}
+
+
+bool
+ValueNode_TimedSwap::set_link_vfunc(int i,ValueNode::Handle x)
+{
+ assert(i>=0 && i<4);
+ switch(i)
+ {
+ case 0:
+ return set_before(x);
+ case 1:
+ return set_after(x);
+ case 2:
+ return set_swap_time(x);
+ case 3:
+ return set_swap_length(x);
+ }
+ return 0;
+}
+
+ValueNode::LooseHandle
+ValueNode_TimedSwap::get_link_vfunc(int i)const
+{
+ assert(i>=0 && i<4);
+ switch(i)
+ {
+ case 0:
+ return get_before();
+ case 1:
+ return get_after();
+ case 2:
+ return get_swap_time();
+ case 3:
+ return get_swap_length();
+ }
+ return 0;
+}
+
+int
+ValueNode_TimedSwap::link_count()const
+{
+ return 4;
+}
+
+String
+ValueNode_TimedSwap::link_local_name(int i)const
+{
+ assert(i>=0 && i<4);
+ switch(i)
+ {
+ case 0:
+ return _("Before");
+ case 1:
+ return _("After");
+ case 2:
+ return _("Swap Time");
+ case 3:
+ return _("Swap Duration");
+ }
+ return 0;
+}
+
+String
+ValueNode_TimedSwap::link_name(int i)const
+{
+ assert(i>=0 && i<4);
+ switch(i)
+ {
+ case 0:
+ return "before";
+ case 1:
+ return "after";
+ case 2:
+ return "time";
+ case 3:
+ return "length";
+ }
+ return 0;
+}
+
+int
+ValueNode_TimedSwap::get_link_index_from_name(const String &name)const
+{
+ if(name=="before")
+ return 0;
+ if(name=="after")
+ return 1;
+ if(name=="time")
+ return 2;
+ if(name=="length")
+ return 3;
+
+ throw Exception::BadLinkName(name);
+}
+
+String
+ValueNode_TimedSwap::get_name()const
+{
+ return "timed_swap";
+}
+
+String
+ValueNode_TimedSwap::get_local_name()const
+{
+ return _("Timed Swap");
+}
+
+bool
+ValueNode_TimedSwap::check_type(ValueBase::Type type)
+{
+ if(!type)
+ return false;
+ return true;
+}
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