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

   1 /* === S Y N F I G ========================================================= */
   2 /*!     \file valuenode_linear.cpp
   3 **      \brief Template File
   4 **
   5 **      $Id$
   6 **
   7 **      \legal
   8 **      Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
   9 **
  10 **      This package is free software; you can redistribute it and/or
  11 **      modify it under the terms of the GNU General Public License as
  12 **      published by the Free Software Foundation; either version 2 of
  13 **      the License, or (at your option) any later version.
  14 **
  15 **      This package is distributed in the hope that it will be useful,
  16 **      but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 **      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  18 **      General Public License for more details.
  19 **      \endlegal
  20 */
  21 /* ========================================================================= */
  22
  23 /* === H E A D E R S ======================================================= */
  24
  25 #ifdef USING_PCH
  26 #       include "pch.h"
  27 #else
  28 #ifdef HAVE_CONFIG_H
  29 #       include <config.h>
  30 #endif
  31
  32 #include "valuenode_linear.h"
  33 #include "valuenode_const.h"
  34 #include "general.h"
  35 #include "color.h"
  36
  37 #endif
  38
  39 /* === U S I N G =========================================================== */
  40
  41 using namespace std;
  42 using namespace etl;
  43 using namespace synfig;
  44
  45 /* === M A C R O S ========================================================= */
  46
  47 /* === G L O B A L S ======================================================= */
  48
  49 /* === P R O C E D U R E S ================================================= */
  50
  51 /* === M E T H O D S ======================================================= */
  52
  53 ValueNode_Linear::ValueNode_Linear(const ValueBase &value):
  54         LinkableValueNode(value.get_type())
  55 {
  56         switch(get_type())
  57         {
  58         case ValueBase::TYPE_ANGLE:
  59                 set_link("slope",ValueNode_Const::create(Angle::deg(0)));
  60                 set_link("offset",ValueNode_Const::create(value.get(Angle())));
  61                 break;
  62         case ValueBase::TYPE_COLOR:
  63                 set_link("slope",ValueNode_Const::create(Color(0,0,0,0)));
  64                 set_link("offset",ValueNode_Const::create(value.get(Color())));
  65                 break;
  66         case ValueBase::TYPE_INTEGER:
  67                 set_link("slope",ValueNode_Const::create(int(0)));
  68                 set_link("offset",ValueNode_Const::create(value.get(int())));
  69                 break;
  70         case ValueBase::TYPE_REAL:
  71                 set_link("slope",ValueNode_Const::create(Real(0)));
  72                 set_link("offset",ValueNode_Const::create(value.get(Real())));
  73                 break;
  74         case ValueBase::TYPE_TIME:
  75                 set_link("slope",ValueNode_Const::create(Time(0)));
  76                 set_link("offset",ValueNode_Const::create(value.get(Time())));
  77                 break;
  78         case ValueBase::TYPE_VECTOR:
  79                 set_link("slope",ValueNode_Const::create(Vector(0,0)));
  80                 set_link("offset",ValueNode_Const::create(value.get(Vector())));
  81                 break;
  82         default:
  83                 throw Exception::BadType(ValueBase::type_name(get_type()));
  84         }
  85
  86         DCAST_HACK_ENABLE();
  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         switch(get_type())
 110         {
 111         case ValueBase::TYPE_ANGLE:
 112                 return (*m_)(t).get( Angle())*t+(*b_)(t).get( Angle());
 113         case ValueBase::TYPE_COLOR:
 114                 return (*m_)(t).get( Color())*t+(*b_)(t).get( Color());
 115         case ValueBase::TYPE_INTEGER:
 116         {
 117                 Real ret = (*m_)(t).get(int())*t+(*b_)(t).get(int()) + 0.5f;
 118                 if (ret < 0) return static_cast<int>(ret-1);
 119                 return static_cast<int>(ret);
 120         }
 121         case ValueBase::TYPE_REAL:
 122                 return (*m_)(t).get(  Real())*t+(*b_)(t).get(  Real());
 123         case ValueBase::TYPE_TIME:
 124                 return (*m_)(t).get(  Time())*t+(*b_)(t).get(  Time());
 125         case ValueBase::TYPE_VECTOR:
 126                 return (*m_)(t).get(Vector())*t+(*b_)(t).get(Vector());
 127         default:
 128                 assert(0);
 129                 break;
 130         }
 131         return ValueBase();
 132 }
 133
 134
 135 String
 136 ValueNode_Linear::get_name()const
 137 {
 138         return "linear";
 139 }
 140
 141 String
 142 ValueNode_Linear::get_local_name()const
 143 {
 144         return _("Linear");
 145 }
 146
 147 bool
 148 ValueNode_Linear::check_type(ValueBase::Type type)
 149 {
 150         return
 151                 type==ValueBase::TYPE_ANGLE             ||
 152                 type==ValueBase::TYPE_COLOR             ||
 153                 type==ValueBase::TYPE_INTEGER   ||
 154                 type==ValueBase::TYPE_REAL              ||
 155                 type==ValueBase::TYPE_TIME              ||
 156                 type==ValueBase::TYPE_VECTOR    ;
 157 }
 158
 159 bool
 160 ValueNode_Linear::set_link_vfunc(int i,ValueNode::Handle x)
 161 {
 162         assert(i==0 || i==1);
 163         if(i==0)
 164         {
 165                 m_=x;
 166                 signal_child_changed()(i);signal_value_changed()();
 167                 return true;
 168         }
 169         if(i==1)
 170         {
 171                 b_=x;
 172                 signal_child_changed()(i);signal_value_changed()();
 173                 return true;
 174         }
 175         return false;
 176 }
 177
 178 ValueNode::LooseHandle
 179 ValueNode_Linear::get_link_vfunc(int i)const
 180 {
 181         assert(i==0 || i==1);
 182         if(i==0) return m_;
 183         if(i==1) return b_;
 184         return 0;
 185 }
 186
 187 int
 188 ValueNode_Linear::link_count()const
 189 {
 190         return 2;
 191 }
 192
 193 String
 194 ValueNode_Linear::link_name(int i)const
 195 {
 196         assert(i==0 || i==1);
 197         if(i==0) return "slope";
 198         if(i==1) return "offset";
 199         return String();
 200 }
 201
 202 String
 203 ValueNode_Linear::link_local_name(int i)const
 204 {
 205         assert(i==0 || i==1);
 206         if(i==0)
 207                 switch(get_type())
 208                 {
 209                 case ValueBase::TYPE_ANGLE:
 210                 case ValueBase::TYPE_COLOR:
 211                 case ValueBase::TYPE_INTEGER:
 212                 case ValueBase::TYPE_REAL:
 213                 case ValueBase::TYPE_TIME:
 214                         return _("Rate");
 215                 case ValueBase::TYPE_VECTOR:
 216                 default:
 217                         return _("Slope");
 218                 }
 219         if(i==1)
 220                 return _("Offset");
 221         return String();
 222 }
 223
 224 int
 225 ValueNode_Linear::get_link_index_from_name(const String &name)const
 226 {
 227         if(name=="slope")  return 0;
 228         if(name=="offset") return 1;
 229
 230         throw Exception::BadLinkName(name);
 231 }