synfig-core/trunk/src/synfig/valuenode_linear.cpp

   1 /* === S Y N F I G ========================================================= */
   2 /*!     \file valuenode_linear.cpp
   3 **      \brief Implementation of the "Linear" valuenode conversion.
   4 **
   5 **      $Id$
   6 **
   7 **      \legal
   8 **      Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
   9 **      Copyright (c) 2007, 2008 Chris Moore
  10 **
  11 **      This package is free software; you can redistribute it and/or
  12 **      modify it under the terms of the GNU General Public License as
  13 **      published by the Free Software Foundation; either version 2 of
  14 **      the License, or (at your option) any later version.
  15 **
  16 **      This package is distributed in the hope that it will be useful,
  17 **      but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 **      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  19 **      General Public License for more details.
  20 **      \endlegal
  21 */
  22 /* ========================================================================= */
  23
  24 /* === H E A D E R S ======================================================= */
  25
  26 #ifdef USING_PCH
  27 #       include "pch.h"
  28 #else
  29 #ifdef HAVE_CONFIG_H
  30 #       include <config.h>
  31 #endif
  32
  33 #include "valuenode_linear.h"
  34 #include "valuenode_const.h"
  35 #include "general.h"
  36 #include "color.h"
  37 #include <ETL/misc>
  38
  39 #endif
  40
  41 /* === U S I N G =========================================================== */
  42
  43 using namespace std;
  44 using namespace etl;
  45 using namespace synfig;
  46
  47 /* === M A C R O S ========================================================= */
  48
  49 /* === G L O B A L S ======================================================= */
  50
  51 /* === P R O C E D U R E S ================================================= */
  52
  53 /* === M E T H O D S ======================================================= */
  54
  55 ValueNode_Linear::ValueNode_Linear(const ValueBase &value):
  56         LinkableValueNode(value.get_type())
  57 {
  58         switch(get_type())
  59         {
  60         case ValueBase::TYPE_ANGLE:
  61                 set_link("slope",ValueNode_Const::create(Angle::deg(0)));
  62                 set_link("offset",ValueNode_Const::create(value.get(Angle())));
  63                 break;
  64         case ValueBase::TYPE_COLOR:
  65                 set_link("slope",ValueNode_Const::create(Color(0,0,0,0)));
  66                 set_link("offset",ValueNode_Const::create(value.get(Color())));
  67                 break;
  68         case ValueBase::TYPE_INTEGER:
  69                 set_link("slope",ValueNode_Const::create(int(0)));
  70                 set_link("offset",ValueNode_Const::create(value.get(int())));
  71                 break;
  72         case ValueBase::TYPE_REAL:
  73                 set_link("slope",ValueNode_Const::create(Real(0)));
  74                 set_link("offset",ValueNode_Const::create(value.get(Real())));
  75                 break;
  76         case ValueBase::TYPE_TIME:
  77                 set_link("slope",ValueNode_Const::create(Time(0)));
  78                 set_link("offset",ValueNode_Const::create(value.get(Time())));
  79                 break;
  80         case ValueBase::TYPE_VECTOR:
  81                 set_link("slope",ValueNode_Const::create(Vector(0,0)));
  82                 set_link("offset",ValueNode_Const::create(value.get(Vector())));
  83                 break;
  84         default:
  85                 throw Exception::BadType(ValueBase::type_local_name(get_type()));
  86         }
  87
  88         DCAST_HACK_ENABLE();
  89 }
  90
  91 LinkableValueNode*
  92 ValueNode_Linear::create_new()const
  93 {
  94         return new ValueNode_Linear(get_type());
  95 }
  96
  97 ValueNode_Linear*
  98 ValueNode_Linear::create(const ValueBase &x)
  99 {
 100         return new ValueNode_Linear(x);
 101 }
 102
 103 ValueNode_Linear::~ValueNode_Linear()
 104 {
 105         unlink_all();
 106 }
 107
 108 ValueBase
 109 ValueNode_Linear::operator()(Time t)const
 110 {
 111         switch(get_type())
 112         {
 113         case ValueBase::TYPE_ANGLE:
 114                 return (*m_)(t).get( Angle())*t+(*b_)(t).get( Angle());
 115         case ValueBase::TYPE_COLOR:
 116                 return (*m_)(t).get( Color())*t+(*b_)(t).get( Color());
 117         case ValueBase::TYPE_INTEGER:
 118                 return round_to_int((*m_)(t).get(int())*t+(*b_)(t).get(int()));
 119         case ValueBase::TYPE_REAL:
 120                 return (*m_)(t).get(  Real())*t+(*b_)(t).get(  Real());
 121         case ValueBase::TYPE_TIME:
 122                 return (*m_)(t).get(  Time())*t+(*b_)(t).get(  Time());
 123         case ValueBase::TYPE_VECTOR:
 124                 return (*m_)(t).get(Vector())*t+(*b_)(t).get(Vector());
 125         default:
 126                 assert(0);
 127                 break;
 128         }
 129         return ValueBase();
 130 }
 131
 132
 133 String
 134 ValueNode_Linear::get_name()const
 135 {
 136         return "linear";
 137 }
 138
 139 String
 140 ValueNode_Linear::get_local_name()const
 141 {
 142         return _("Linear");
 143 }
 144
 145 bool
 146 ValueNode_Linear::check_type(ValueBase::Type type)
 147 {
 148         return
 149                 type==ValueBase::TYPE_ANGLE             ||
 150                 type==ValueBase::TYPE_COLOR             ||
 151                 type==ValueBase::TYPE_INTEGER   ||
 152                 type==ValueBase::TYPE_REAL              ||
 153                 type==ValueBase::TYPE_TIME              ||
 154                 type==ValueBase::TYPE_VECTOR    ;
 155 }
 156
 157 bool
 158 ValueNode_Linear::set_link_vfunc(int i,ValueNode::Handle value)
 159 {
 160         assert(i>=0 && i<link_count());
 161
 162         switch(i)
 163         {
 164         case 0: CHECK_TYPE_AND_SET_VALUE(m_, get_type());
 165         case 1: CHECK_TYPE_AND_SET_VALUE(b_, get_type());
 166         }
 167         return false;
 168 }
 169
 170 ValueNode::LooseHandle
 171 ValueNode_Linear::get_link_vfunc(int i)const
 172 {
 173         assert(i>=0 && i<link_count());
 174
 175         if(i==0) return m_;
 176         if(i==1) return b_;
 177         return 0;
 178 }
 179
 180 int
 181 ValueNode_Linear::link_count()const
 182 {
 183         return 2;
 184 }
 185
 186 String
 187 ValueNode_Linear::link_name(int i)const
 188 {
 189         assert(i>=0 && i<link_count());
 190
 191         if(i==0) return "slope";
 192         if(i==1) return "offset";
 193         return String();
 194 }
 195
 196 String
 197 ValueNode_Linear::link_local_name(int i)const
 198 {
 199         assert(i>=0 && i<link_count());
 200
 201         if(i==0)
 202                 switch(get_type())
 203                 {
 204                 case ValueBase::TYPE_ANGLE:
 205                 case ValueBase::TYPE_COLOR:
 206                 case ValueBase::TYPE_INTEGER:
 207                 case ValueBase::TYPE_REAL:
 208                 case ValueBase::TYPE_TIME:
 209                         return _("Rate");
 210                 case ValueBase::TYPE_VECTOR:
 211                 default:
 212                         return _("Slope");
 213                 }
 214         if(i==1)
 215                 return _("Offset");
 216         return String();
 217 }
 218
 219 int
 220 ValueNode_Linear::get_link_index_from_name(const String &name)const
 221 {
 222         if(name=="slope")  return 0;
 223         if(name=="offset") return 1;
 224
 225         throw Exception::BadLinkName(name);
 226 }