+++ /dev/null
-/* === 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;
-}
projects / synfig.git / blobdiff