synfig-core/trunk/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 #include <ETL/misc>
  39
  40 #endif
  41
  42 /* === U S I N G =========================================================== */
  43
  44 using namespace std;
  45 using namespace etl;
  46 using namespace synfig;
  47
  48 /* === M A C R O S ========================================================= */
  49
  50 /* === G L O B A L S ======================================================= */
  51
  52 /* === P R O C E D U R E S ================================================= */
  53
  54 /* === M E T H O D S ======================================================= */
  55
  56 ValueNode_TimedSwap::ValueNode_TimedSwap(const ValueBase &value):
  57         LinkableValueNode(value.get_type())
  58 {
  59         switch(get_type())
  60         {
  61         case ValueBase::TYPE_ANGLE:
  62                 set_link("before",ValueNode_Const::create(value.get(Angle())));
  63                 set_link("after",ValueNode_Const::create(value.get(Angle())));
  64                 break;
  65         case ValueBase::TYPE_COLOR:
  66                 set_link("before",ValueNode_Const::create(value.get(Color())));
  67                 set_link("after",ValueNode_Const::create(value.get(Color())));
  68                 break;
  69         case ValueBase::TYPE_INTEGER:
  70                 set_link("before",ValueNode_Const::create(value.get(int())));
  71                 set_link("after",ValueNode_Const::create(value.get(int())));
  72                 break;
  73         case ValueBase::TYPE_REAL:
  74                 set_link("before",ValueNode_Const::create(value.get(Real())));
  75                 set_link("after",ValueNode_Const::create(value.get(Real())));
  76                 break;
  77         case ValueBase::TYPE_TIME:
  78                 set_link("before",ValueNode_Const::create(value.get(Time())));
  79                 set_link("after",ValueNode_Const::create(value.get(Time())));
  80                 break;
  81         case ValueBase::TYPE_VECTOR:
  82                 set_link("before",ValueNode_Const::create(value.get(Vector())));
  83                 set_link("after",ValueNode_Const::create(value.get(Vector())));
  84                 break;
  85         default:
  86                 throw Exception::BadType(ValueBase::type_name(get_type()));
  87         }
  88
  89         set_link("time",ValueNode_Const::create(Time(2)));
  90         set_link("length",ValueNode_Const::create(Time(1)));
  91
  92         DCAST_HACK_ENABLE();
  93 }
  94
  95 ValueNode_TimedSwap*
  96 ValueNode_TimedSwap::create(const ValueBase& x)
  97 {
  98         return new ValueNode_TimedSwap(x);
  99 }
 100
 101
 102 LinkableValueNode*
 103 ValueNode_TimedSwap::create_new()const
 104 {
 105         return new ValueNode_TimedSwap(get_type());
 106 }
 107
 108
 109 synfig::ValueNode_TimedSwap::~ValueNode_TimedSwap()
 110 {
 111         unlink_all();
 112 }
 113
 114
 115
 116 bool
 117 ValueNode_TimedSwap::set_before(const ValueNode::Handle &x)
 118 {
 119         if(!x || x->get_type()!=get_type()
 120                 && !PlaceholderValueNode::Handle::cast_dynamic(x))
 121                 return false;
 122
 123         before=x;
 124
 125         return true;
 126 }
 127
 128 ValueNode::Handle
 129 ValueNode_TimedSwap::get_before()const
 130 {
 131         return before;
 132 }
 133
 134
 135 bool
 136 ValueNode_TimedSwap::set_after(const ValueNode::Handle &x)
 137 {
 138         if(!x || x->get_type()!=get_type()
 139                 && !PlaceholderValueNode::Handle::cast_dynamic(x))
 140                 return false;
 141
 142         after=x;
 143
 144         return true;
 145 }
 146
 147 ValueNode::Handle
 148 ValueNode_TimedSwap::get_after()const
 149 {
 150         return after;
 151 }
 152
 153
 154 bool
 155 ValueNode_TimedSwap::set_swap_time(const ValueNode::Handle &x)
 156 {
 157         if(!x || (!ValueBase(x->get_type()).same_type_as(ValueBase::TYPE_TIME) &&
 158                           !PlaceholderValueNode::Handle::cast_dynamic(x)))
 159                 return false;
 160
 161         swap_time=x;
 162         return true;
 163 }
 164
 165 ValueNode::Handle
 166 ValueNode_TimedSwap::get_swap_time()const
 167 {
 168         return swap_time;
 169 }
 170
 171 bool
 172 ValueNode_TimedSwap::set_swap_length(const ValueNode::Handle &x)
 173 {
 174         if(!x || (!ValueBase(x->get_type()).same_type_as(ValueBase::TYPE_TIME) &&
 175                           !PlaceholderValueNode::Handle::cast_dynamic(x)))
 176                 return false;
 177
 178         swap_length=x;
 179         return true;
 180 }
 181
 182 ValueNode::Handle
 183 ValueNode_TimedSwap::get_swap_length()const
 184 {
 185         return swap_length;
 186 }
 187
 188
 189
 190 synfig::ValueBase
 191 synfig::ValueNode_TimedSwap::operator()(Time t)const
 192 {
 193         Time swptime=(*swap_time)(t).get(Time());
 194         Time swplength=(*swap_length)(t).get(Time());
 195
 196         if(t>swptime)
 197                 return (*after)(t);
 198
 199         if(t<=swptime && t>swptime-swplength)
 200         {
 201                 Real amount=(swptime-t)/swplength;
 202                 // if amount==0.0, then we are after
 203                 // if amount==1.0, then we are before
 204
 205                 switch(get_type())
 206                 {
 207                 case ValueBase::TYPE_ANGLE:
 208                         {
 209                                 Angle a=(*after)(t).get(Angle());
 210                                 Angle b=(*before)(t).get(Angle());
 211                                 return (b-a)*amount+a;
 212                         }
 213                 case ValueBase::TYPE_COLOR:
 214                         {
 215                                 Color a=(*after)(t).get(Color());
 216                                 Color b=(*before)(t).get(Color());
 217                                 // note: Shouldn't this use a straight blend?
 218                                 return (b-a)*amount+a;
 219                         }
 220                 case ValueBase::TYPE_INTEGER:
 221                         {
 222                                 float a=(float)(*after)(t).get(int());
 223                                 float b=(float)(*before)(t).get(int());
 224                                 return round_to_int((b-a)*amount+a);
 225                         }
 226                 case ValueBase::TYPE_REAL:
 227                         {
 228                                 Real a=(*after)(t).get(Real());
 229                                 Real b=(*before)(t).get(Real());
 230                                 return (b-a)*amount+a;
 231                         }
 232                 case ValueBase::TYPE_TIME:
 233                         {
 234                                 Time a=(*after)(t).get(Time());
 235                                 Time b=(*before)(t).get(Time());
 236                                 return (b-a)*amount+a;
 237                         }
 238                 case ValueBase::TYPE_VECTOR:
 239                         {
 240                                 Vector a=(*after)(t).get(Vector());
 241                                 Vector b=(*before)(t).get(Vector());
 242                                 return (b-a)*amount+a;
 243                         }
 244                 default:
 245                         break;
 246                 }
 247         }
 248
 249
 250         /*! \todo this should interpolate from
 251         **      before to after over the period defined
 252         **      by swap_length */
 253
 254         return (*before)(t);
 255 }
 256
 257
 258 bool
 259 ValueNode_TimedSwap::set_link_vfunc(int i,ValueNode::Handle x)
 260 {
 261         assert(i>=0 && i<4);
 262         switch(i)
 263         {
 264         case 0: return set_before(x);
 265         case 1: return set_after(x);
 266         case 2: return set_swap_time(x);
 267         case 3: return set_swap_length(x);
 268         }
 269         return false;
 270 }
 271
 272 ValueNode::LooseHandle
 273 ValueNode_TimedSwap::get_link_vfunc(int i)const
 274 {
 275         assert(i>=0 && i<4);
 276         switch(i)
 277         {
 278         case 0: return get_before();
 279         case 1: return get_after();
 280         case 2: return get_swap_time();
 281         case 3: return get_swap_length();
 282         }
 283         return 0;
 284 }
 285
 286 int
 287 ValueNode_TimedSwap::link_count()const
 288 {
 289         return 4;
 290 }
 291
 292 String
 293 ValueNode_TimedSwap::link_local_name(int i)const
 294 {
 295         assert(i>=0 && i<4);
 296         switch(i)
 297         {
 298         case 0: return _("Before");
 299         case 1: return _("After");
 300         case 2: return _("Swap Time");
 301         case 3: return _("Swap Duration");
 302         default:return String();
 303         }
 304 }
 305
 306 String
 307 ValueNode_TimedSwap::link_name(int i)const
 308 {
 309         assert(i>=0 && i<4);
 310         switch(i)
 311         {
 312         case 0: return "before";
 313         case 1: return "after";
 314         case 2: return "time";
 315         case 3: return "length";
 316         default:return String();
 317         }
 318 }
 319
 320 int
 321 ValueNode_TimedSwap::get_link_index_from_name(const String &name)const
 322 {
 323         if(name=="before")      return 0;
 324         if(name=="after")       return 1;
 325         if(name=="time")        return 2;
 326         if(name=="length")      return 3;
 327
 328         throw Exception::BadLinkName(name);
 329 }
 330
 331 String
 332 ValueNode_TimedSwap::get_name()const
 333 {
 334         return "timed_swap";
 335 }
 336
 337 String
 338 ValueNode_TimedSwap::get_local_name()const
 339 {
 340         return _("Timed Swap");
 341 }
 342
 343 bool
 344 ValueNode_TimedSwap::check_type(ValueBase::Type type)
 345 {
 346         return
 347                 type==ValueBase::TYPE_ANGLE ||
 348                 type==ValueBase::TYPE_COLOR ||
 349                 type==ValueBase::TYPE_INTEGER ||
 350                 type==ValueBase::TYPE_REAL ||
 351                 type==ValueBase::TYPE_TIME ||
 352                 type==ValueBase::TYPE_VECTOR;
 353 }