synfig-core/tags/synfig_0_61_03/synfig-core/src/synfig/valuenode_timedswap.cpp

   1 /* === S Y N F I G ========================================================= */
   2 /*!     \file valuenode_timedswap.cpp
   3 **      \brief Template File
   4 **
   5 **      $Id: valuenode_timedswap.cpp,v 1.1.1.1 2005/01/04 01:23:15 darco Exp $
   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 "general.h"
  33 #include "valuenode_timedswap.h"
  34 #include "valuenode_const.h"
  35 #include <stdexcept>
  36 #include "color.h"
  37
  38 #endif
  39
  40 /* === U S I N G =========================================================== */
  41
  42 using namespace std;
  43 using namespace etl;
  44 using namespace synfig;
  45
  46 /* === M A C R O S ========================================================= */
  47
  48 /* === G L O B A L S ======================================================= */
  49
  50 /* === P R O C E D U R E S ================================================= */
  51
  52 /* === M E T H O D S ======================================================= */
  53
  54 ValueNode_TimedSwap::ValueNode_TimedSwap(ValueBase::Type type):
  55         LinkableValueNode(type)
  56 {
  57         set_before(ValueNode_Const::create(type));
  58         set_after(ValueNode_Const::create(type));
  59         set_swap_time_real(1.0);
  60         set_swap_length_real(1.0);
  61
  62         DCAST_HACK_ENABLE();
  63 }
  64
  65 ValueNode_TimedSwap*
  66 ValueNode_TimedSwap::create(const ValueBase& x)
  67 {
  68         return new ValueNode_TimedSwap(x.get_type());
  69 }
  70
  71
  72 LinkableValueNode*
  73 ValueNode_TimedSwap::create_new()const
  74 {
  75         return new ValueNode_TimedSwap(get_type());
  76 }
  77
  78
  79 synfig::ValueNode_TimedSwap::~ValueNode_TimedSwap()
  80 {
  81         unlink_all();
  82 }
  83
  84
  85
  86 bool
  87 ValueNode_TimedSwap::set_before(const ValueNode::Handle &x)
  88 {
  89         if(!x || x->get_type()!=get_type()
  90                 && !PlaceholderValueNode::Handle::cast_dynamic(x))
  91                 return false;
  92
  93         before=x;
  94
  95         return true;
  96 }
  97
  98 ValueNode::Handle
  99 ValueNode_TimedSwap::get_before()const
 100 {
 101         return before;
 102 }
 103
 104
 105 bool
 106 ValueNode_TimedSwap::set_after(const ValueNode::Handle &x)
 107 {
 108         if(!x || x->get_type()!=get_type()
 109                 && !PlaceholderValueNode::Handle::cast_dynamic(x))
 110                 return false;
 111
 112         after=x;
 113
 114         return true;
 115 }
 116
 117 ValueNode::Handle
 118 ValueNode_TimedSwap::get_after()const
 119 {
 120         return after;
 121 }
 122
 123
 124 void
 125 ValueNode_TimedSwap::set_swap_time_real(Time x)
 126 {
 127         set_swap_time(ValueNode_Const::create(x));
 128 }
 129
 130 bool
 131 ValueNode_TimedSwap::set_swap_time(const ValueNode::Handle &x)
 132 {
 133         if(!x
 134                 || !ValueBase(ValueBase::TYPE_TIME).same_as(x->get_type())
 135                 && !PlaceholderValueNode::Handle::cast_dynamic(x)
 136         )
 137                 return false;
 138         swap_time=x;
 139         return true;
 140 }
 141
 142 ValueNode::Handle
 143 ValueNode_TimedSwap::get_swap_time()const
 144 {
 145         return swap_time;
 146 }
 147
 148 void
 149 ValueNode_TimedSwap::set_swap_length_real(Time x)
 150 {
 151         set_swap_length(ValueNode_Const::create(x));
 152 }
 153
 154 bool
 155 ValueNode_TimedSwap::set_swap_length(const ValueNode::Handle &x)
 156 {
 157         if(!x || (
 158                 !ValueBase(ValueBase::TYPE_TIME).same_as(x->get_type())
 159                 && !PlaceholderValueNode::Handle::cast_dynamic(x)
 160                 )
 161         )
 162                 return false;
 163         swap_length=x;
 164         return true;
 165 }
 166
 167 ValueNode::Handle
 168 ValueNode_TimedSwap::get_swap_length()const
 169 {
 170         return swap_length;
 171 }
 172
 173
 174
 175 synfig::ValueBase
 176 synfig::ValueNode_TimedSwap::operator()(Time t)const
 177 {
 178         Time swptime=(*swap_time)(t).get(Time());
 179         Time swplength=(*swap_length)(t).get(Time());
 180
 181         if(t>swptime)
 182                 return (*after)(t);
 183
 184         if(t<=swptime && t>swptime-swplength)
 185         {
 186                 Real amount=(swptime-t)/swplength;
 187                 // if amount==0.0, then we are after
 188                 // if amount==1.0, then we are before
 189
 190                 switch(get_type())
 191                 {
 192                 case ValueBase::TYPE_REAL:
 193                         {
 194                                 Real a=(*after)(t).get(Real());
 195                                 Real b=(*before)(t).get(Real());
 196                                 return (b-a)*amount+a;
 197                         }
 198                 case ValueBase::TYPE_VECTOR:
 199                         {
 200                                 Vector a=(*after)(t).get(Vector());
 201                                 Vector b=(*before)(t).get(Vector());
 202                                 return (b-a)*amount+a;
 203                         }
 204                 case ValueBase::TYPE_ANGLE:
 205                         {
 206                                 Angle a=(*after)(t).get(Angle());
 207                                 Angle b=(*before)(t).get(Angle());
 208                                 return (b-a)*amount+a;
 209                         }
 210                 case ValueBase::TYPE_COLOR:
 211                         {
 212                                 Color a=(*after)(t).get(Color());
 213                                 Color b=(*before)(t).get(Color());
 214                                 // note: Shouldn't this use a straight blend?
 215                                 return (b-a)*amount+a;
 216                         }
 217                 case ValueBase::TYPE_INTEGER:
 218                         {
 219                                 float a=(float)(*after)(t).get(int());
 220                                 float b=(float)(*before)(t).get(int());
 221                                 return static_cast<int>((b-a)*amount+a+0.5f);
 222                         }
 223                 default:
 224                         break;
 225                 }
 226         }
 227
 228
 229         /*! \todo this should interpolate from
 230         **      before to after over the period defined
 231         **      by swap_length */
 232
 233         return (*before)(t);
 234 }
 235
 236
 237 bool
 238 ValueNode_TimedSwap::set_link_vfunc(int i,ValueNode::Handle x)
 239 {
 240         assert(i>=0 && i<4);
 241         switch(i)
 242         {
 243         case 0:
 244                 return set_before(x);
 245         case 1:
 246                 return set_after(x);
 247         case 2:
 248                 return set_swap_time(x);
 249         case 3:
 250                 return set_swap_length(x);
 251         }
 252         return 0;
 253 }
 254
 255 ValueNode::LooseHandle
 256 ValueNode_TimedSwap::get_link_vfunc(int i)const
 257 {
 258         assert(i>=0 && i<4);
 259         switch(i)
 260         {
 261         case 0:
 262                 return get_before();
 263         case 1:
 264                 return get_after();
 265         case 2:
 266                 return get_swap_time();
 267         case 3:
 268                 return get_swap_length();
 269         }
 270         return 0;
 271 }
 272
 273 int
 274 ValueNode_TimedSwap::link_count()const
 275 {
 276         return 4;
 277 }
 278
 279 String
 280 ValueNode_TimedSwap::link_local_name(int i)const
 281 {
 282         assert(i>=0 && i<4);
 283         switch(i)
 284         {
 285         case 0:
 286                 return _("Before");
 287         case 1:
 288                 return _("After");
 289         case 2:
 290                 return _("Swap Time");
 291         case 3:
 292                 return _("Swap Duration");
 293         }
 294         return 0;
 295 }
 296
 297 String
 298 ValueNode_TimedSwap::link_name(int i)const
 299 {
 300         assert(i>=0 && i<4);
 301         switch(i)
 302         {
 303         case 0:
 304                 return "before";
 305         case 1:
 306                 return "after";
 307         case 2:
 308                 return "time";
 309         case 3:
 310                 return "length";
 311         }
 312         return 0;
 313 }
 314
 315 int
 316 ValueNode_TimedSwap::get_link_index_from_name(const String &name)const
 317 {
 318         if(name=="before")
 319                 return 0;
 320         if(name=="after")
 321                 return 1;
 322         if(name=="time")
 323                 return 2;
 324         if(name=="length")
 325                 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         if(!type)
 346                 return false;
 347         return true;
 348 }