synfig-core/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
  89 LinkableValueNode*
  90 ValueNode_Linear::create_new()const
  91 {
  92         return new ValueNode_Linear(get_type());
  93 }
  94
  95 ValueNode_Linear*
  96 ValueNode_Linear::create(const ValueBase &x)
  97 {
  98         return new ValueNode_Linear(x);
  99 }
 100
 101 ValueNode_Linear::~ValueNode_Linear()
 102 {
 103         unlink_all();
 104 }
 105
 106 ValueBase
 107 ValueNode_Linear::operator()(Time t)const
 108 {
 109         if (getenv("SYNFIG_DEBUG_VALUENODE_OPERATORS"))
 110                 printf("%s:%d operator()\n", __FILE__, __LINE__);
 111
 112         switch(get_type())
 113         {
 114         case ValueBase::TYPE_ANGLE:
 115                 return (*m_)(t).get( Angle())*t+(*b_)(t).get( Angle());
 116         case ValueBase::TYPE_COLOR:
 117                 return (*m_)(t).get( Color())*t+(*b_)(t).get( Color());
 118         case ValueBase::TYPE_INTEGER:
 119                 return round_to_int((*m_)(t).get(int())*t+(*b_)(t).get(int()));
 120         case ValueBase::TYPE_REAL:
 121                 return (*m_)(t).get(  Real())*t+(*b_)(t).get(  Real());
 122         case ValueBase::TYPE_TIME:
 123                 return (*m_)(t).get(  Time())*t+(*b_)(t).get(  Time());
 124         case ValueBase::TYPE_VECTOR:
 125                 return (*m_)(t).get(Vector())*t+(*b_)(t).get(Vector());
 126         default:
 127                 assert(0);
 128                 break;
 129         }
 130         return ValueBase();
 131 }
 132
 133
 134 String
 135 ValueNode_Linear::get_name()const
 136 {
 137         return "linear";
 138 }
 139
 140 String
 141 ValueNode_Linear::get_local_name()const
 142 {
 143         return _("Linear");
 144 }
 145
 146 bool
 147 ValueNode_Linear::check_type(ValueBase::Type type)
 148 {
 149         return
 150                 type==ValueBase::TYPE_ANGLE             ||
 151                 type==ValueBase::TYPE_COLOR             ||
 152                 type==ValueBase::TYPE_INTEGER   ||
 153                 type==ValueBase::TYPE_REAL              ||
 154                 type==ValueBase::TYPE_TIME              ||
 155                 type==ValueBase::TYPE_VECTOR    ;
 156 }
 157
 158 bool
 159 ValueNode_Linear::set_link_vfunc(int i,ValueNode::Handle value)
 160 {
 161         assert(i>=0 && i<link_count());
 162
 163         switch(i)
 164         {
 165         case 0: CHECK_TYPE_AND_SET_VALUE(m_, get_type());
 166         case 1: CHECK_TYPE_AND_SET_VALUE(b_, get_type());
 167         }
 168         return false;
 169 }
 170
 171 ValueNode::LooseHandle
 172 ValueNode_Linear::get_link_vfunc(int i)const
 173 {
 174         assert(i>=0 && i<link_count());
 175
 176         if(i==0) return m_;
 177         if(i==1) return b_;
 178         return 0;
 179 }
 180
 181 int
 182 ValueNode_Linear::link_count()const
 183 {
 184         return 2;
 185 }
 186
 187 String
 188 ValueNode_Linear::link_name(int i)const
 189 {
 190         assert(i>=0 && i<link_count());
 191
 192         if(i==0) return "slope";
 193         if(i==1) return "offset";
 194         return String();
 195 }
 196
 197 String
 198 ValueNode_Linear::link_local_name(int i)const
 199 {
 200         assert(i>=0 && i<link_count());
 201
 202         if(i==0)
 203                 switch(get_type())
 204                 {
 205                 case ValueBase::TYPE_ANGLE:
 206                 case ValueBase::TYPE_COLOR:
 207                 case ValueBase::TYPE_INTEGER:
 208                 case ValueBase::TYPE_REAL:
 209                 case ValueBase::TYPE_TIME:
 210                         return _("Rate");
 211                 case ValueBase::TYPE_VECTOR:
 212                 default:
 213                         return _("Slope");
 214                 }
 215         if(i==1)
 216                 return _("Offset");
 217         return String();
 218 }
 219
 220 int
 221 ValueNode_Linear::get_link_index_from_name(const String &name)const
 222 {
 223         if(name=="slope")  return 0;
 224         if(name=="offset") return 1;
 225
 226         throw Exception::BadLinkName(name);
 227 }
 228
 229
 230 LinkableValueNode::Vocab
 231 ValueNode_Linear::get_children_vocab_vfunc()const
 232 {
 233         LinkableValueNode::Vocab ret;
 234
 235         switch(get_type())
 236         {
 237         case ValueBase::TYPE_ANGLE:
 238         case ValueBase::TYPE_COLOR:
 239         case ValueBase::TYPE_INTEGER:
 240         case ValueBase::TYPE_REAL:
 241         case ValueBase::TYPE_TIME:
 242                 ret.push_back(ParamDesc(ValueBase(),"slope")
 243                         .set_local_name(_("Rate"))
 244                         .set_description(_("Value that is multiplied by the current time (in seconds)"))
 245                 );
 246         break;
 247         case ValueBase::TYPE_VECTOR:
 248         default:
 249                 ret.push_back(ParamDesc(ValueBase(),"slope")
 250                         .set_local_name(_("Slope"))
 251                         .set_description(_("Value that is multiplied by the current time (in seconds)"))
 252                 );
 253         }
 254
 255         ret.push_back(ParamDesc(ValueBase(),"offset")
 256                 .set_local_name(_("Offset"))
 257                 .set_description(_("Returned value when the current time is zero"))
 258         );
 259
 260         return ret;
 261 }