synfig-core/tags/synfig_0_61_07_rc3/src/synfig/valuenode_timedswap.cpp

   1 /* === S Y N F I G ========================================================= */
   2 /*!     \file valuenode_timedswap.cpp
   3 **      \brief Template File
   4 **
   5 **      $Id$
   6 **
   7 **      \legal
   8 **      Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
   9 **      Copyright (c) 2007 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 "general.h"
  34 #include "valuenode_timedswap.h"
  35 #include "valuenode_const.h"
  36 #include <stdexcept>
  37 #include "color.h"
  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_TimedSwap::ValueNode_TimedSwap(const ValueBase &value):
  56         LinkableValueNode(value.get_type())
  57 {
  58         switch(get_type())
  59         {
  60         case ValueBase::TYPE_ANGLE:
  61                 set_link("before",ValueNode_Const::create(value.get(Angle())));
  62                 set_link("after",ValueNode_Const::create(value.get(Angle())));
  63                 break;
  64         case ValueBase::TYPE_COLOR:
  65                 set_link("before",ValueNode_Const::create(value.get(Color())));
  66                 set_link("after",ValueNode_Const::create(value.get(Color())));
  67                 break;
  68         case ValueBase::TYPE_INTEGER:
  69                 set_link("before",ValueNode_Const::create(value.get(int())));
  70                 set_link("after",ValueNode_Const::create(value.get(int())));
  71                 break;
  72         case ValueBase::TYPE_REAL:
  73                 set_link("before",ValueNode_Const::create(value.get(Real())));
  74                 set_link("after",ValueNode_Const::create(value.get(Real())));
  75                 break;
  76         case ValueBase::TYPE_TIME:
  77                 set_link("before",ValueNode_Const::create(value.get(Time())));
  78                 set_link("after",ValueNode_Const::create(value.get(Time())));
  79                 break;
  80         case ValueBase::TYPE_VECTOR:
  81                 set_link("before",ValueNode_Const::create(value.get(Vector())));
  82                 set_link("after",ValueNode_Const::create(value.get(Vector())));
  83                 break;
  84         default:
  85                 throw Exception::BadType(ValueBase::type_name(get_type()));
  86         }
  87
  88         set_link("time",ValueNode_Const::create(Time(2)));
  89         set_link("length",ValueNode_Const::create(Time(1)));
  90
  91         DCAST_HACK_ENABLE();
  92 }
  93
  94 ValueNode_TimedSwap*
  95 ValueNode_TimedSwap::create(const ValueBase& x)
  96 {
  97         return new ValueNode_TimedSwap(x);
  98 }
  99
 100
 101 LinkableValueNode*
 102 ValueNode_TimedSwap::create_new()const
 103 {
 104         return new ValueNode_TimedSwap(get_type());
 105 }
 106
 107
 108 synfig::ValueNode_TimedSwap::~ValueNode_TimedSwap()
 109 {
 110         unlink_all();
 111 }
 112
 113
 114
 115 bool
 116 ValueNode_TimedSwap::set_before(const ValueNode::Handle &x)
 117 {
 118         if(!x || x->get_type()!=get_type()
 119                 && !PlaceholderValueNode::Handle::cast_dynamic(x))
 120                 return false;
 121
 122         before=x;
 123
 124         return true;
 125 }
 126
 127 ValueNode::Handle
 128 ValueNode_TimedSwap::get_before()const
 129 {
 130         return before;
 131 }
 132
 133
 134 bool
 135 ValueNode_TimedSwap::set_after(const ValueNode::Handle &x)
 136 {
 137         if(!x || x->get_type()!=get_type()
 138                 && !PlaceholderValueNode::Handle::cast_dynamic(x))
 139                 return false;
 140
 141         after=x;
 142
 143         return true;
 144 }
 145
 146 ValueNode::Handle
 147 ValueNode_TimedSwap::get_after()const
 148 {
 149         return after;
 150 }
 151
 152
 153 bool
 154 ValueNode_TimedSwap::set_swap_time(const ValueNode::Handle &x)
 155 {
 156         if(!x || (!ValueBase(x->get_type()).same_type_as(ValueBase::TYPE_TIME) &&
 157                           !PlaceholderValueNode::Handle::cast_dynamic(x)))
 158                 return false;
 159
 160         swap_time=x;
 161         return true;
 162 }
 163
 164 ValueNode::Handle
 165 ValueNode_TimedSwap::get_swap_time()const
 166 {
 167         return swap_time;
 168 }
 169
 170 bool
 171 ValueNode_TimedSwap::set_swap_length(const ValueNode::Handle &x)
 172 {
 173         if(!x || (!ValueBase(x->get_type()).same_type_as(ValueBase::TYPE_TIME) &&
 174                           !PlaceholderValueNode::Handle::cast_dynamic(x)))
 175                 return false;
 176
 177         swap_length=x;
 178         return true;
 179 }
 180
 181 ValueNode::Handle
 182 ValueNode_TimedSwap::get_swap_length()const
 183 {
 184         return swap_length;
 185 }
 186
 187
 188
 189 synfig::ValueBase
 190 synfig::ValueNode_TimedSwap::operator()(Time t)const
 191 {
 192         Time swptime=(*swap_time)(t).get(Time());
 193         Time swplength=(*swap_length)(t).get(Time());
 194
 195         if(t>swptime)
 196                 return (*after)(t);
 197
 198         if(t<=swptime && t>swptime-swplength)
 199         {
 200                 Real amount=(swptime-t)/swplength;
 201                 // if amount==0.0, then we are after
 202                 // if amount==1.0, then we are before
 203
 204                 switch(get_type())
 205                 {
 206                 case ValueBase::TYPE_ANGLE:
 207                         {
 208                                 Angle a=(*after)(t).get(Angle());
 209                                 Angle b=(*before)(t).get(Angle());
 210                                 return (b-a)*amount+a;
 211                         }
 212                 case ValueBase::TYPE_COLOR:
 213                         {
 214                                 Color a=(*after)(t).get(Color());
 215                                 Color b=(*before)(t).get(Color());
 216                                 // note: Shouldn't this use a straight blend?
 217                                 return (b-a)*amount+a;
 218                         }
 219                 case ValueBase::TYPE_INTEGER:
 220                         {
 221                                 float a=(float)(*after)(t).get(int());
 222                                 float b=(float)(*before)(t).get(int());
 223                                 return static_cast<int>((b-a)*amount+a+0.5f);
 224                         }
 225                 case ValueBase::TYPE_REAL:
 226                         {
 227                                 Real a=(*after)(t).get(Real());
 228                                 Real b=(*before)(t).get(Real());
 229                                 return (b-a)*amount+a;
 230                         }
 231                 case ValueBase::TYPE_TIME:
 232                         {
 233                                 Time a=(*after)(t).get(Time());
 234                                 Time b=(*before)(t).get(Time());
 235                                 return (b-a)*amount+a;
 236                         }
 237                 case ValueBase::TYPE_VECTOR:
 238                         {
 239                                 Vector a=(*after)(t).get(Vector());
 240                                 Vector b=(*before)(t).get(Vector());
 241                                 return (b-a)*amount+a;
 242                         }
 243                 default:
 244                         break;
 245                 }
 246         }
 247
 248
 249         /*! \todo this should interpolate from
 250         **      before to after over the period defined
 251         **      by swap_length */
 252
 253         return (*before)(t);
 254 }
 255
 256
 257 bool
 258 ValueNode_TimedSwap::set_link_vfunc(int i,ValueNode::Handle x)
 259 {
 260         assert(i>=0 && i<4);
 261         switch(i)
 262         {
 263         case 0: return set_before(x);
 264         case 1: return set_after(x);
 265         case 2: return set_swap_time(x);
 266         case 3: return set_swap_length(x);
 267         }
 268         return false;
 269 }
 270
 271 ValueNode::LooseHandle
 272 ValueNode_TimedSwap::get_link_vfunc(int i)const
 273 {
 274         assert(i>=0 && i<4);
 275         switch(i)
 276         {
 277         case 0: return get_before();
 278         case 1: return get_after();
 279         case 2: return get_swap_time();
 280         case 3: return get_swap_length();
 281         }
 282         return 0;
 283 }
 284
 285 int
 286 ValueNode_TimedSwap::link_count()const
 287 {
 288         return 4;
 289 }
 290
 291 String
 292 ValueNode_TimedSwap::link_local_name(int i)const
 293 {
 294         assert(i>=0 && i<4);
 295         switch(i)
 296         {
 297         case 0: return _("Before");
 298         case 1: return _("After");
 299         case 2: return _("Swap Time");
 300         case 3: return _("Swap Duration");
 301         default:return String();
 302         }
 303 }
 304
 305 String
 306 ValueNode_TimedSwap::link_name(int i)const
 307 {
 308         assert(i>=0 && i<4);
 309         switch(i)
 310         {
 311         case 0: return "before";
 312         case 1: return "after";
 313         case 2: return "time";
 314         case 3: return "length";
 315         default:return String();
 316         }
 317 }
 318
 319 int
 320 ValueNode_TimedSwap::get_link_index_from_name(const String &name)const
 321 {
 322         if(name=="before")      return 0;
 323         if(name=="after")       return 1;
 324         if(name=="time")        return 2;
 325         if(name=="length")      return 3;
 326
 327         throw Exception::BadLinkName(name);
 328 }
 329
 330 String
 331 ValueNode_TimedSwap::get_name()const
 332 {
 333         return "timed_swap";
 334 }
 335
 336 String
 337 ValueNode_TimedSwap::get_local_name()const
 338 {
 339         return _("Timed Swap");
 340 }
 341
 342 bool
 343 ValueNode_TimedSwap::check_type(ValueBase::Type type)
 344 {
 345         return
 346                 type==ValueBase::TYPE_ANGLE ||
 347                 type==ValueBase::TYPE_COLOR ||
 348                 type==ValueBase::TYPE_INTEGER ||
 349                 type==ValueBase::TYPE_REAL ||
 350                 type==ValueBase::TYPE_TIME ||
 351                 type==ValueBase::TYPE_VECTOR;
 352 }