Remove ancient trunk folder from svn repository

[synfig.git] / synfig-core / src / synfig / valuenode_pow.cpp

diff --git a/synfig-core/src/synfig/valuenode_pow.cpp b/synfig-core/src/synfig/valuenode_pow.cpp
new file mode 100644 (file)
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+/* === S Y N F I G ========================================================= */
+/*!    \file valuenode_pow.cpp
+**     \brief Implementation of the "Power" valuenode conversion.
+**
+**     $Id$
+**
+**     \legal
+**     Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
+**     Copyright (c) 2007, 2008 Chris Moore
+**     Copyright (c) 2009 Nikita Kitaev
+**
+**     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_pow.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_Pow::ValueNode_Pow(const ValueBase &x):
+       LinkableValueNode(x.get_type())
+{
+       Real value(x.get(Real()));
+       Real infinity(999999.0);
+       Real epsilon(0.000001);
+
+       set_link("base",     ValueNode_Const::create(Real(value)));
+       set_link("power",    ValueNode_Const::create(Real(1)));
+       set_link("epsilon",  ValueNode_Const::create(Real(epsilon)));
+       set_link("infinite", ValueNode_Const::create(Real(infinity)));
+}
+
+ValueNode_Pow*
+ValueNode_Pow::create(const ValueBase &x)
+{
+       return new ValueNode_Pow(x);
+}
+
+LinkableValueNode*
+ValueNode_Pow::create_new()const
+{
+       return new ValueNode_Pow(get_type());
+}
+
+ValueNode_Pow::~ValueNode_Pow()
+{
+       unlink_all();
+}
+
+bool
+ValueNode_Pow::set_link_vfunc(int i,ValueNode::Handle value)
+{
+       assert(i>=0 && i<link_count());
+
+       switch(i)
+       {
+       case 0: CHECK_TYPE_AND_SET_VALUE(base_,     ValueBase::TYPE_REAL);
+       case 1: CHECK_TYPE_AND_SET_VALUE(power_,    ValueBase::TYPE_REAL);
+       case 2: CHECK_TYPE_AND_SET_VALUE(epsilon_,  ValueBase::TYPE_REAL);
+       case 3: CHECK_TYPE_AND_SET_VALUE(infinite_, ValueBase::TYPE_REAL);
+       }
+       return false;
+}
+
+ValueNode::LooseHandle
+ValueNode_Pow::get_link_vfunc(int i)const
+{
+       assert(i>=0 && i<link_count());
+
+       if(i==0) return base_;
+       if(i==1) return power_;
+       if(i==2) return epsilon_;
+       if(i==3) return infinite_;
+       return 0;
+}
+
+int
+ValueNode_Pow::link_count()const
+{
+       return 4;
+}
+
+String
+ValueNode_Pow::link_local_name(int i)const
+{
+       assert(i>=0 && i<link_count());
+
+       if(i==0) return _("Base");
+       if(i==1) return _("Power");
+       if(i==2) return _("Epsilon");
+       if(i==3) return _("Infinite");
+       return String();
+}
+
+String
+ValueNode_Pow::link_name(int i)const
+{
+       assert(i>=0 && i<link_count());
+
+       if(i==0) return "base";
+       if(i==1) return "power";
+       if(i==2) return "epsilon";
+       if(i==3) return "infinite";
+       return String();
+}
+
+int
+ValueNode_Pow::get_link_index_from_name(const String &name)const
+{
+       if(name=="base")     return 0;
+       if(name=="power")    return 1;
+       if(name=="epsilon")  return 2;
+       if(name=="infinite") return 3;
+
+       throw Exception::BadLinkName(name);
+}
+
+ValueBase
+ValueNode_Pow::operator()(Time t)const
+{
+       if (getenv("SYNFIG_DEBUG_VALUENODE_OPERATORS"))
+               printf("%s:%d operator()\n", __FILE__, __LINE__);
+
+       Real base     = (*base_)    (t).get(Real());
+       Real power    = (*power_)   (t).get(Real());
+       Real epsilon  = (*epsilon_) (t).get(Real());
+       Real infinite = (*infinite_)(t).get(Real());
+
+
+
+       if (epsilon < 0.00000001)
+               epsilon = 0.00000001;
+
+       //Filters for special/undefined cases
+
+       if (abs(power) < epsilon) //x^0 = 1
+               return 1;
+       if (abs(base) < epsilon)
+               if (power > 0) //0^x=0
+                       return Real(0);
+               else
+                       if ( ( ((int) power) % 2 != 0) && (base < 0) ) //(-0)^(-odd)=-inf
+                               return -infinite;
+                       else
+                               return infinite;
+
+       if (base <= epsilon && ((int) power) != power) //negative number to fractional power -> undefined
+               power = ((int) power);  //so round off power to nearest integer
+
+       return pow(base,power);
+
+}
+
+String
+ValueNode_Pow::get_name()const
+{
+       return "power";
+}
+
+String
+ValueNode_Pow::get_local_name()const
+{
+       return _("Power");
+}
+
+bool
+ValueNode_Pow::check_type(ValueBase::Type type)
+{
+       return type==ValueBase::TYPE_REAL;
+}