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         Vocab ret(get_children_vocab());
  59         set_children_vocab(ret);
  60         switch(get_type())
  61         {
  62         case ValueBase::TYPE_ANGLE:
  63                 set_link("slope",ValueNode_Const::create(Angle::deg(0)));
  64                 set_link("offset",ValueNode_Const::create(value.get(Angle())));
  65                 break;
  66         case ValueBase::TYPE_COLOR:
  67                 set_link("slope",ValueNode_Const::create(Color(0,0,0,0)));
  68                 set_link("offset",ValueNode_Const::create(value.get(Color())));
  69                 break;
  70         case ValueBase::TYPE_INTEGER:
  71                 set_link("slope",ValueNode_Const::create(int(0)));
  72                 set_link("offset",ValueNode_Const::create(value.get(int())));
  73                 break;
  74         case ValueBase::TYPE_REAL:
  75                 set_link("slope",ValueNode_Const::create(Real(0)));
  76                 set_link("offset",ValueNode_Const::create(value.get(Real())));
  77                 break;
  78         case ValueBase::TYPE_TIME:
  79                 set_link("slope",ValueNode_Const::create(Time(0)));
  80                 set_link("offset",ValueNode_Const::create(value.get(Time())));
  81                 break;
  82         case ValueBase::TYPE_VECTOR:
  83                 set_link("slope",ValueNode_Const::create(Vector(0,0)));
  84                 set_link("offset",ValueNode_Const::create(value.get(Vector())));
  85                 break;
  86         default:
  87                 throw Exception::BadType(ValueBase::type_local_name(get_type()));
  88         }
  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         if (getenv("SYNFIG_DEBUG_VALUENODE_OPERATORS"))
 112                 printf("%s:%d operator()\n", __FILE__, __LINE__);
 113
 114         switch(get_type())
 115         {
 116         case ValueBase::TYPE_ANGLE:
 117                 return (*m_)(t).get( Angle())*t+(*b_)(t).get( Angle());
 118         case ValueBase::TYPE_COLOR:
 119                 return (*m_)(t).get( Color())*t+(*b_)(t).get( Color());
 120         case ValueBase::TYPE_INTEGER:
 121                 return round_to_int((*m_)(t).get(int())*t+(*b_)(t).get(int()));
 122         case ValueBase::TYPE_REAL:
 123                 return (*m_)(t).get(  Real())*t+(*b_)(t).get(  Real());
 124         case ValueBase::TYPE_TIME:
 125                 return (*m_)(t).get(  Time())*t+(*b_)(t).get(  Time());
 126         case ValueBase::TYPE_VECTOR:
 127                 return (*m_)(t).get(Vector())*t+(*b_)(t).get(Vector());
 128         default:
 129                 assert(0);
 130                 break;
 131         }
 132         return ValueBase();
 133 }
 134
 135
 136 String
 137 ValueNode_Linear::get_name()const
 138 {
 139         return "linear";
 140 }
 141
 142 String
 143 ValueNode_Linear::get_local_name()const
 144 {
 145         return _("Linear");
 146 }
 147
 148 bool
 149 ValueNode_Linear::check_type(ValueBase::Type type)
 150 {
 151         return
 152                 type==ValueBase::TYPE_ANGLE             ||
 153                 type==ValueBase::TYPE_COLOR             ||
 154                 type==ValueBase::TYPE_INTEGER   ||
 155                 type==ValueBase::TYPE_REAL              ||
 156                 type==ValueBase::TYPE_TIME              ||
 157                 type==ValueBase::TYPE_VECTOR    ;
 158 }
 159
 160 bool
 161 ValueNode_Linear::set_link_vfunc(int i,ValueNode::Handle value)
 162 {
 163         assert(i>=0 && i<link_count());
 164
 165         switch(i)
 166         {
 167         case 0: CHECK_TYPE_AND_SET_VALUE(m_, get_type());
 168         case 1: CHECK_TYPE_AND_SET_VALUE(b_, get_type());
 169         }
 170         return false;
 171 }
 172
 173 ValueNode::LooseHandle
 174 ValueNode_Linear::get_link_vfunc(int i)const
 175 {
 176         assert(i>=0 && i<link_count());
 177
 178         if(i==0) return m_;
 179         if(i==1) return b_;
 180         return 0;
 181 }
 182
 183 LinkableValueNode::Vocab
 184 ValueNode_Linear::get_children_vocab_vfunc()const
 185 {
 186         if(children_vocab.size())
 187                 return children_vocab;
 188
 189         LinkableValueNode::Vocab ret;
 190
 191         switch(get_type())
 192         {
 193         case ValueBase::TYPE_ANGLE:
 194         case ValueBase::TYPE_COLOR:
 195         case ValueBase::TYPE_INTEGER:
 196         case ValueBase::TYPE_REAL:
 197         case ValueBase::TYPE_TIME:
 198                 ret.push_back(ParamDesc(ValueBase(),"slope")
 199                         .set_local_name(_("Rate"))
 200                         .set_description(_("Value that is multiplied by the current time (in seconds)"))
 201                 );
 202         break;
 203         case ValueBase::TYPE_VECTOR:
 204         default:
 205                 ret.push_back(ParamDesc(ValueBase(),"slope")
 206                         .set_local_name(_("Slope"))
 207                         .set_description(_("Value that is multiplied by the current time (in seconds)"))
 208                 );
 209         }
 210
 211         ret.push_back(ParamDesc(ValueBase(),"offset")
 212                 .set_local_name(_("Offset"))
 213                 .set_description(_("Returned value when the current time is zero"))
 214         );
 215
 216         return ret;
 217 }