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

   1 /* === S Y N F I G ========================================================= */
   2 /*!     \file valuenode_animated.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 <vector>
  33 #include <list>
  34 #include <stdexcept>
  35
  36 #include <cmath>
  37
  38 #include <ETL/bezier>
  39 #include <ETL/hermite>
  40 #include <ETL/spline>
  41 #include <ETL/handle>
  42 #include <ETL/misc>
  43
  44 #include <algorithm>
  45 #include <typeinfo>
  46
  47 #include "canvas.h"
  48 #include "general.h"
  49 #include "valuenode_animated.h"
  50 #include "valuenode_const.h"
  51 #include "exception.h"
  52 #include "gradient.h"
  53
  54 #endif
  55
  56 /* === U S I N G =========================================================== */
  57
  58 using namespace std;
  59 using namespace etl;
  60 using namespace synfig;
  61
  62 /* === M A C R O S ========================================================= */
  63
  64 // Fast binary search implementation
  65 /*
  66 template<typename I, typename T> inline I
  67 binary_find(I begin, I end, const T& value)
  68 {
  69         I iter(begin+(end-begin)/2);
  70
  71         while(end-begin>1 && !(*iter==value))
  72         {
  73                 ((*iter<value)?begin:end) = iter;
  74
  75                 iter = begin+(end-begin)/2;
  76         }
  77         return iter;
  78 }
  79 */
  80
  81 /*
  82 template<typename T> String tangent_info(T a, T b, T v)
  83 {
  84         return "...";
  85 }
  86
  87 String tangent_info(Vector a, Vector b, Vector v)
  88 {
  89         if(a==b)
  90                 return strprintf("(should be zero) T=[%f,%f], Pp=[%f,%f], Pn=[%f,%f]",v[0],v[1],a[0],a[1],b[0],b[1]);
  91         else
  92                 return strprintf("(should NOT be zero) T=[%f,%f], Pp=[%f,%f], Pn=[%f,%f]",v[0],v[1],a[0],a[1],b[0],b[1]);
  93 }
  94 */
  95
  96 template <class T>
  97 struct subtractor : public std::binary_function<T, T, T>
  98 {
  99         T operator()(const T &a,const T &b)const
 100         {
 101                 return a-b;
 102         }
 103 };
 104
 105 template <>
 106 struct subtractor<Angle> : public std::binary_function<Angle, Angle, Angle>
 107 {
 108         Angle operator()(const Angle &a,const Angle &b)const
 109         {
 110                 return a.dist(b);
 111         }
 112 };
 113
 114 template <class T>
 115 struct magnitude : public std::unary_function<float, T>
 116 {
 117         float operator()(const T &a)const
 118         {
 119                 return abs(a);
 120         }
 121 };
 122
 123 template <>
 124 struct magnitude<Angle> : public std::unary_function<float, Angle>
 125 {
 126         float operator()(const Angle &a)const
 127         {
 128                 return abs(Angle::rad(a).get());
 129         }
 130 };
 131
 132 template <>
 133 struct magnitude<Vector> : public std::unary_function<float, Vector>
 134 {
 135         float operator()(const Vector &a)const
 136         {
 137                 return a.mag();
 138         }
 139 };
 140
 141 template <>
 142 struct magnitude<Color> : public std::unary_function<float, Color>
 143 {
 144         float operator()(const Color &a)const
 145         {
 146                 return abs(a.get_y());
 147         }
 148 };
 149
 150
 151
 152
 153
 154 template <class T>
 155 struct is_angle_type
 156 {
 157         bool operator()()const
 158         {
 159                 return false;
 160         }
 161 };
 162
 163 template <>
 164 struct is_angle_type<Angle>
 165 {
 166         bool operator()()const
 167         {
 168                 return true;
 169         }
 170 };
 171
 172 /* === G L O B A L S ======================================================= */
 173
 174 /* === C L A S S E S ======================================================= */
 175
 176 template<typename T>
 177 class _Hermite : public synfig::ValueNode_Animated
 178 {
 179 public:
 180         typedef T value_type;
 181         affine_combo<value_type,Time> affine_combo_func;
 182         subtractor<value_type>  subtract_func;
 183         magnitude<value_type>   magnitude_func;
 184         is_angle_type<value_type>       is_angle;
 185 private:
 186         struct PathSegment
 187         {
 188                 is_angle_type<value_type>       is_angle;
 189                 subtractor<value_type>  subtract_func;
 190
 191                 mutable hermite<Time,Time> first;
 192                 mutable hermite<value_type,Time> second;
 193                 WaypointList::iterator start;
 194                 WaypointList::iterator end;
 195
 196                 value_type resolve(const Time &t)const
 197                 {
 198                         bool start_static(start->is_static());
 199                         bool end_static(end->is_static());
 200
 201                         if(!start_static || !end_static)
 202                         {
 203                                 //if(!start_static)
 204                                         second.p1()=start->get_value(t).get(value_type());
 205                                 if(start->get_after()==INTERPOLATION_CONSTANT || end->get_before()==INTERPOLATION_CONSTANT)
 206                                         return second.p1();
 207                                 //if(!end_static)
 208                                         second.p2()=end->get_value(t).get(value_type());
 209
 210                                 // At the moment, the only type of non-constant interpolation
 211                                 // that we support is linear.
 212                                 second.t1()=
 213                                 second.t2()=subtract_func(second.p2(),second.p1());
 214
 215                                 second.sync();
 216                         }
 217
 218                         return second(first(t));
 219                 }
 220         };
 221         typedef vector <
 222                 PathSegment
 223                 /*
 224                 pair <
 225                         hermite<Time,Time>,
 226                         hermite<value_type,Time>
 227                 >
 228                 */
 229         > curve_list_type;
 230
 231         curve_list_type curve_list;
 232
 233         // Bounds of this curve
 234         Time r,s;
 235
 236 public:
 237         ValueNode* clone(const GUID& deriv_guid)const
 238         {
 239                 { ValueNode* x(find_value_node(get_guid()^deriv_guid).get()); if(x)return x; }
 240                 _Hermite<T>* ret(new _Hermite<T>());
 241                 ret->set_guid(get_guid()^deriv_guid);
 242                 for(WaypointList::const_iterator iter=waypoint_list().begin();iter!=waypoint_list().end();++iter)
 243                         ret->add(iter->clone(deriv_guid));
 244                 return ret;
 245         }
 246
 247         _Hermite()
 248         {
 249                 set_type(ValueBase(value_type()).get_type());
 250         }
 251
 252         virtual WaypointList::iterator new_waypoint(Time t, ValueBase value)
 253         {
 254                 // Make sure we are getting data of the correct type
 255                 //if(data.type!=type)
 256                 //      return waypoint_list_type::iterator();
 257
 258                 try { find(t); throw Exception::BadTime(_("A waypoint already exists at this point in time")); } catch(Exception::NotFound) { };
 259                 Waypoint waypoint(value,t);
 260                 waypoint.set_parent_value_node(this);
 261
 262                 waypoint_list_.push_back(waypoint);
 263                 WaypointList::iterator ret=waypoint_list_.end();
 264                 --ret;
 265
 266                 if(is_angle())
 267                 {
 268                         ret->set_before(INTERPOLATION_LINEAR);
 269                         ret->set_after(INTERPOLATION_LINEAR);
 270                 }
 271
 272                 changed();
 273
 274                 return ret;
 275         }
 276
 277         virtual WaypointList::iterator new_waypoint(Time t, ValueNode::Handle value_node)
 278         {
 279                 // Make sure we are getting data of the correct type
 280                 //if(data.type!=type)
 281                 //      return waypoint_list_type::iterator();
 282                 try { find(t); throw Exception::BadTime(_("A waypoint already exists at this point in time")); } catch(Exception::NotFound) { };
 283
 284                 Waypoint waypoint(value_node,t);
 285                 waypoint.set_parent_value_node(this);
 286
 287                 waypoint_list_.push_back(waypoint);
 288                 WaypointList::iterator ret=waypoint_list_.end();
 289                 --ret;
 290
 291                 if(is_angle())
 292                 {
 293                         ret->set_before(INTERPOLATION_LINEAR);
 294                         ret->set_after(INTERPOLATION_LINEAR);
 295                 }
 296
 297                 changed();
 298
 299                 return ret;
 300         }
 301
 302         virtual void on_changed()
 303         {
 304                 ValueNode_Animated::on_changed();
 305
 306                 if(waypoint_list_.size()<=1)
 307                         return;
 308                 std::sort(waypoint_list_.begin(),waypoint_list_.end());
 309                 //waypoint_list_.sort();
 310
 311                 r=waypoint_list_.front().get_time();
 312                 s=waypoint_list_.back().get_time();
 313
 314                 curve_list.clear();
 315
 316                 WaypointList::iterator prev,iter,next=waypoint_list_.begin();
 317                 int i=0;
 318
 319                 for(iter=next++;iter!=waypoint_list_.end() && next!=waypoint_list_.end();prev=iter,iter=next++,i++)
 320                 {
 321                         typename curve_list_type::value_type curve;
 322                         WaypointList::iterator after_next(next);
 323                         ++after_next;
 324
 325                         curve.start=iter;
 326                         curve.end=next;
 327
 328                         // Set up the positions
 329                         curve.first.set_rs(iter->get_time(), next->get_time());
 330                         curve.second.set_rs(iter->get_time(), next->get_time());
 331
 332                         Waypoint::Interpolation iter_get_after(iter->get_after());
 333                         Waypoint::Interpolation next_get_after(next->get_after());
 334                         Waypoint::Interpolation iter_get_before(iter->get_before());
 335                         Waypoint::Interpolation next_get_before(next->get_before());
 336
 337                         if(is_angle())
 338                         {
 339                                 if(iter_get_after==INTERPOLATION_TCB)
 340                                         iter_get_after=INTERPOLATION_LINEAR;
 341                                 if(next_get_after==INTERPOLATION_TCB)
 342                                         next_get_after=INTERPOLATION_LINEAR;
 343                                 if(iter_get_before==INTERPOLATION_TCB)
 344                                         iter_get_before=INTERPOLATION_LINEAR;
 345                                 if(next_get_before==INTERPOLATION_TCB)
 346                                         next_get_before=INTERPOLATION_LINEAR;
 347                         }
 348
 349                         if(iter->is_static() && next->is_static())
 350                         {
 351                                 curve.second.p1()=iter->get_value().get(T());
 352                                 curve.second.p2()=next->get_value().get(T());
 353                                 if(iter_get_after==INTERPOLATION_CONSTANT || next_get_before==INTERPOLATION_CONSTANT)
 354                                 {
 355                                         // Sections must be constant on both sides.
 356                                         // NOTE: this is commented out because of some
 357                                         // user interface issues. Namely, if a section is
 358                                         // constant and the user turns off the constant on
 359                                         // one waypoint, this will end up turning it back on.
 360                                         // Confusing.
 361                                         //iter->get_after()=next->get_before()=INTERPOLATION_CONSTANT;
 362                                         curve.second.p1()=
 363                                         curve.second.p2()=iter->get_value().get(T());
 364                                         curve.second.t1()=
 365                                         curve.second.t2()=subtract_func(curve.second.p1(),curve.second.p2());
 366                                 }
 367                                 else
 368                                 {
 369                                         if(iter_get_after==INTERPOLATION_TCB && iter!=waypoint_list_.begin() && !is_angle())
 370                                         {
 371                                                 if(iter->get_before()!=INTERPOLATION_TCB && !curve_list.empty())
 372                                                 {
 373                                                         curve.second.t1()=curve_list.back().second.t2();
 374                                                 }
 375                                                 else
 376                                                 {
 377
 378                                                 const Real& t(iter->get_tension());             // Tension
 379                                                 const Real& c(iter->get_continuity());  // Continuity
 380                                                 const Real& b(iter->get_bias());                        // Bias
 381
 382                                                 // The folloing line works where the previous line fails.
 383                                                 value_type Pp; Pp=curve_list.back().second.p1();        // P_{i-1}
 384
 385                                                 const value_type& Pc(curve.second.p1());        // P_i
 386                                                 const value_type& Pn(curve.second.p2());        // P_{i+1}
 387
 388                                                 // TCB
 389                                                 value_type vect(static_cast<value_type>(subtract_func(Pc,Pp)*(((1.0-t)*(1.0+c)*(1.0+b))/2.0)+(Pn-Pc)*(((1.0-t)*(1.0-c)*(1.0-b))/2.0)));
 390
 391                                                 // Tension Only
 392                                                 //value_type vect=(value_type)((Pn-Pp)*(1.0-t));
 393
 394                                                 // Linear
 395                                                 //value_type vect=(value_type)(Pn-Pc);
 396
 397                                                 // Debugging stuff
 398                                                 //synfig::info("%d:t1: %s",i,tangent_info(Pp,Pn,vect).c_str());
 399
 400                                                 // Adjust for time
 401                                                 //vect=value_type(vect*(curve.second.get_dt()*2.0)/(curve.second.get_dt()+curve_list.back().second.get_dt()));
 402                                                 //vect=value_type(vect*(curve.second.get_dt())/(curve_list.back().second.get_dt()));
 403
 404                                                 curve.second.t1()=vect;
 405                                                 }
 406                                         }
 407                                         else if(
 408                                                 iter_get_after==INTERPOLATION_LINEAR || iter_get_after==INTERPOLATION_HALT ||
 409                                                 (iter_get_after==INTERPOLATION_TCB && iter==waypoint_list_.begin()))
 410                                         {
 411                                                 curve.second.t1()=subtract_func(curve.second.p2(),curve.second.p1());
 412                                         }
 413
 414                                         if(iter_get_before==INTERPOLATION_TCB && iter->get_after()!=INTERPOLATION_TCB && !curve_list.empty())
 415                                         {
 416                                                 curve_list.back().second.t2()=curve.second.t1();
 417                                                 curve_list.back().second.sync();
 418                                         }
 419
 420
 421                                         if(next_get_before==INTERPOLATION_TCB && after_next!=waypoint_list_.end()  && !is_angle())
 422                                         {
 423                                                 const Real &t(next->get_tension());             // Tension
 424                                                 const Real &c(next->get_continuity());  // Continuity
 425                                                 const Real &b(next->get_bias());                        // Bias
 426                                                 const value_type &Pp(curve.second.p1());        // P_{i-1}
 427                                                 const value_type &Pc(curve.second.p2());        // P_i
 428                                                 value_type Pn; Pn=after_next->get_value().get(T());     // P_{i+1}
 429
 430                                                 // TCB
 431                                                 value_type vect(static_cast<value_type>(subtract_func(Pc,Pp)*(((1.0-t)*(1.0-c)*(1.0+b))/2.0)+(Pn-Pc)*(((1.0-t)*(1.0+c)*(1.0-b))/2.0)));
 432
 433                                                 // Tension Only
 434                                                 //value_type vect((value_type)((Pn-Pp)*(1.0-t)));
 435
 436                                                 // Linear
 437                                                 //value_type vect=(value_type)(Pc-Pp);
 438
 439                                                 // Debugging stuff
 440                                                 //synfig::info("%d:t2: %s",i,tangent_info(Pp,Pn,vect).c_str());
 441
 442                                                 // Adjust for time
 443                                                 //vect=value_type(vect*(curve.second.get_dt()*2.0)/(curve.second.get_dt()+(after_next->get_time()-next->get_time())));
 444                                                 //vect=value_type(vect*(curve.second.get_dt()/((after_next->get_time()-next->get_time()))));
 445
 446                                                 curve.second.t2()=vect;
 447                                         }
 448                                         else if(
 449                                                 next_get_before==INTERPOLATION_LINEAR || next_get_before==INTERPOLATION_HALT ||
 450                                                 (next_get_before==INTERPOLATION_TCB && after_next==waypoint_list_.end()))
 451                                         {
 452                                                 curve.second.t2()=subtract_func(curve.second.p2(),curve.second.p1());
 453                                         }
 454
 455                                         // Adjust for time
 456                                         const float timeadjust(0.5);
 457
 458                                         if(iter_get_after==INTERPOLATION_HALT)
 459                                                 curve.second.t1()*=0;
 460                                         else if(iter_get_after != INTERPOLATION_LINEAR && !curve_list.empty())
 461                                                 curve.second.t1()*=(curve.second.get_dt()*(timeadjust+1))/(curve.second.get_dt()*timeadjust+curve_list.back().second.get_dt());
 462
 463                                         if(next_get_before==INTERPOLATION_HALT)
 464                                                 curve.second.t2()*=0;
 465                                         else if(next_get_before != INTERPOLATION_LINEAR && after_next!=waypoint_list_.end())
 466                                                 curve.second.t2()*=(curve.second.get_dt()*(timeadjust+1))/(curve.second.get_dt()*timeadjust+(after_next->get_time()-next->get_time()));
 467                                 } // not CONSTANT
 468                         }
 469
 470                         // Set up the time to the default stuff
 471                         curve.first.set_rs(iter->get_time(), next->get_time());
 472                         curve.first.p1()=iter->get_time();
 473                         curve.first.p2()=next->get_time();
 474                         curve.first.t1()=(curve.first.p2()-curve.first.p1())*(1.0f-iter->get_time_tension());
 475                         curve.first.t2()=(curve.first.p2()-curve.first.p1())*(1.0f-next->get_time_tension());
 476
 477
 478                         curve.first.sync();
 479                         curve.second.sync();
 480
 481                         curve_list.push_back(curve);
 482                 }
 483         }
 484
 485         virtual ValueBase operator()(Time t)const
 486         {
 487                 if(waypoint_list_.empty())
 488                         return value_type();    //! \todo Perhaps we should throw something here?
 489                 if(waypoint_list_.size()==1)
 490                         return waypoint_list_.front().get_value(t);
 491                 if(t<=r)
 492                         return waypoint_list_.front().get_value(t);
 493                 if(t>=s)
 494                         return waypoint_list_.back().get_value(t);
 495
 496                 typename curve_list_type::const_iterator iter;
 497
 498                 // This next line will set iter to the
 499                 // correct iterator for the given time.
 500                 for(iter=curve_list.begin();iter<curve_list.end() && t>=iter->first.get_s();++iter)
 501                         continue;
 502                 if(iter==curve_list.end())
 503                         return waypoint_list_.back().get_value(t);
 504                 return iter->resolve(t);
 505         }
 506 };
 507
 508
 509 template<typename T>
 510 class _Constant : public synfig::ValueNode_Animated
 511 {
 512 public:
 513         typedef T value_type;
 514
 515 private:
 516
 517         // Bounds of this curve
 518         Time r,s;
 519
 520 public:
 521         ValueNode* clone(const GUID& deriv_guid)const
 522         {
 523                 { ValueNode* x(find_value_node(get_guid()^deriv_guid).get()); if(x)return x; }
 524                 _Constant<T>* ret(new _Constant<T>());
 525                 ret->set_guid(get_guid()^deriv_guid);
 526                 for(WaypointList::const_iterator iter=waypoint_list().begin();iter!=waypoint_list().end();++iter)
 527                         ret->add(iter->clone(deriv_guid));
 528                 return ret;
 529         }
 530
 531         _Constant()
 532         {
 533                 set_type(ValueBase(value_type()).get_type());
 534         }
 535
 536         virtual WaypointList::iterator new_waypoint(Time t, ValueBase value)
 537         {
 538                 // Make sure we are getting data of the correct type
 539                 //if(data.type!=type)
 540                 //      return waypoint_list_type::iterator();
 541                 try { find(t); throw Exception::BadTime(_("A waypoint already exists at this point in time")); } catch(Exception::NotFound) { };
 542
 543                 Waypoint waypoint(value,t);
 544                 waypoint.set_parent_value_node(this);
 545
 546                 waypoint_list_.push_back(waypoint);
 547                 WaypointList::iterator ret=waypoint_list_.end();
 548                 --ret;
 549                 changed();
 550
 551                 return ret;
 552         }
 553
 554         virtual WaypointList::iterator new_waypoint(Time t, ValueNode::Handle value_node)
 555         {
 556                 // Make sure we are getting data of the correct type
 557                 //if(data.type!=type)
 558                 //      return waypoint_list_type::iterator();
 559                 try { find(t); throw Exception::BadTime(_("A waypoint already exists at this point in time")); } catch(Exception::NotFound) { };
 560
 561                 Waypoint waypoint(value_node,t);
 562                 waypoint.set_parent_value_node(this);
 563
 564                 waypoint_list_.push_back(waypoint);
 565                 WaypointList::iterator ret=waypoint_list_.end();
 566                 --ret;
 567                 changed();
 568
 569                 return ret;
 570         }
 571
 572         virtual void on_changed()
 573         {
 574                 ValueNode_Animated::on_changed();
 575
 576                 if(waypoint_list_.size()<=1)
 577                         return;
 578                 std::sort(waypoint_list_.begin(),waypoint_list_.end());
 579                 //waypoint_list_.sort();
 580                 r=waypoint_list_.front().get_time();
 581                 s=waypoint_list_.back().get_time();
 582
 583         }
 584
 585         virtual ValueBase operator()(Time t)const
 586         {
 587                 if(waypoint_list_.size()==1)
 588                         return waypoint_list_.front().get_value(t);
 589                 if(waypoint_list_.empty())
 590                         return value_type();
 591                 if(t<=r)
 592                         return waypoint_list_.front().get_value(t);
 593                 if(t>=s)
 594                         return waypoint_list_.back().get_value(t);
 595
 596                 typename WaypointList::const_iterator iter;
 597                 typename WaypointList::const_iterator next;
 598
 599                 // This next line will set iter to the
 600                 // correct iterator for the given time.
 601                 for(next=waypoint_list_.begin(),iter=next++;next!=waypoint_list_.end() && t>=next->get_time();iter=next++)
 602                         continue;
 603
 604                 return iter->get_value(t);
 605         }
 606 };
 607
 608 class _AnimBool : public synfig::ValueNode_Animated
 609 {
 610 public:
 611         typedef bool value_type;
 612
 613 private:
 614
 615         // Bounds of this curve
 616         Time r,s;
 617
 618 public:
 619         ValueNode* clone(const GUID& deriv_guid)const
 620         {
 621                 { ValueNode* x(find_value_node(get_guid()^deriv_guid).get()); if(x)return x; }
 622                 _AnimBool* ret(new _AnimBool());
 623                 ret->set_guid(get_guid()^deriv_guid);
 624                 for(WaypointList::const_iterator iter=waypoint_list().begin();iter!=waypoint_list().end();++iter)
 625                         ret->add(iter->clone(deriv_guid));
 626                 return ret;
 627         }
 628
 629         _AnimBool()
 630         {
 631                 set_type(ValueBase(value_type()).get_type());
 632         }
 633
 634         virtual WaypointList::iterator new_waypoint(Time t, ValueBase value)
 635         {
 636                 // Make sure we are getting data of the correct type
 637                 //if(data.type!=type)
 638                 //      return waypoint_list_type::iterator();
 639                 try { find(t); throw Exception::BadTime(_("A waypoint already exists at this point in time")); } catch(Exception::NotFound) { };
 640
 641
 642                 Waypoint waypoint(value,t);
 643                 waypoint.set_parent_value_node(this);
 644
 645                 waypoint_list_.push_back(waypoint);
 646                 WaypointList::iterator ret=waypoint_list_.end();
 647                 --ret;
 648                 changed();
 649
 650                 return ret;
 651         }
 652
 653         virtual WaypointList::iterator new_waypoint(Time t, ValueNode::Handle value_node)
 654         {
 655                 // Make sure we are getting data of the correct type
 656                 //if(data.type!=type)
 657                 //      return waypoint_list_type::iterator();
 658                 try { find(t); throw Exception::BadTime(_("A waypoint already exists at this point in time")); } catch(Exception::NotFound) { };
 659
 660                 Waypoint waypoint(value_node,t);
 661                 waypoint.set_parent_value_node(this);
 662
 663                 waypoint_list_.push_back(waypoint);
 664                 WaypointList::iterator ret=waypoint_list_.end();
 665                 --ret;
 666                 changed();
 667
 668                 return ret;
 669         }
 670
 671         virtual void on_changed()
 672         {
 673                 ValueNode_Animated::on_changed();
 674
 675                 if(waypoint_list_.size()<=1)
 676                         return;
 677                 std::sort(waypoint_list_.begin(),waypoint_list_.end());
 678                 //waypoint_list_.sort();
 679                 r=waypoint_list_.front().get_time();
 680                 s=waypoint_list_.back().get_time();
 681
 682         }
 683
 684         virtual ValueBase operator()(Time t)const
 685         {
 686                 if(waypoint_list_.size()==1)
 687                         return waypoint_list_.front().get_value(t);
 688                 if(waypoint_list_.empty())
 689                         return false;
 690                 if(t<r)
 691                         return waypoint_list_.front().get_value(t);
 692                 if(t>s)
 693                         return waypoint_list_.back().get_value(t);
 694
 695                 WaypointList::const_iterator iter;
 696                 WaypointList::const_iterator next;
 697
 698                 // This next line will set iter to the
 699                 // correct iterator for the given time.
 700                 for(next=waypoint_list_.begin(),iter=next++;next!=waypoint_list_.end() && t>=next->get_time();iter=next++)
 701                         if(iter->get_time()==t)
 702                                 return iter->get_value(t);
 703
 704                 if(iter->get_time()==t)
 705                         return iter->get_value(t);
 706
 707                 if(next!=waypoint_list_.end())
 708                         return iter->get_value(t).get(bool()) || next->get_value(t).get(bool());
 709                 return iter->get_value(t);
 710         }
 711 };
 712
 713 /* === M E T H O D S ======================================================= */
 714
 715 ValueNode_Animated::ValueNode_Animated()
 716 {
 717         DCAST_HACK_ENABLE();
 718 }
 719
 720 int
 721 ValueNode_Animated::find(const Time& begin,const Time& end,std::vector<Waypoint*>& selected)
 722 {
 723         Time curr_time(begin);
 724         int ret(0);
 725
 726         // try to grab first waypoint
 727         try
 728         {
 729                 WaypointList::iterator iter;
 730                 iter=find(curr_time);
 731                 selected.push_back(&*iter);
 732                 ret++;
 733         }
 734         catch(...) { }
 735
 736         try
 737         {
 738                 WaypointList::iterator iter;
 739                 while(true)
 740                 {
 741                         iter=find_next(curr_time);
 742                         curr_time=iter->get_time();
 743                         if(curr_time>=end)
 744                                 break;
 745                         selected.push_back(&*iter);
 746                         ret++;
 747                 }
 748         }
 749         catch(...) { }
 750
 751         return ret;
 752 }
 753
 754 /*
 755 void
 756 ValueNode_Animated::manipulate_time(const Time& old_begin,const Time& old_end,const Time& new_begin,const Time& new_end)
 757 {
 758 #define old_2_new(x)    (((x)-old_begin)/(old_end-old_begin)*(new_end-new_begin)+new_begin)
 759         std::vector<Waypoint*> selected;
 760         std::vector<Waypoint*>::iterator iter;
 761
 762         if(find(old_begin,old_end,selected))
 763         {
 764                 // check to make sure this operation is OK
 765                 for(iter=selected.begin();iter!=selected.end();++iter)
 766                 {
 767                         try
 768                         {
 769                                 Time new_time(old_2_new((*iter)->get_time()));
 770                                 if(new_time>=old_begin && new_time<old_end)
 771                                         continue;
 772                                 find(new_time);
 773                                 // If we found a waypoint already at that time, then
 774                                 // we need to abort
 775                                 throw Exception::BadTime(_("Waypoint Conflict"));
 776                         }
 777                         catch(Exception::NotFound) { }
 778
 779                         selected.back()->set_time(old_2_new(selected.back()->get_time()));
 780                         selected.pop_back();
 781                 }
 782
 783
 784                 while(!selected.empty())
 785                 {
 786                         selected.back()->set_time(old_2_new(selected.back()->get_time()));
 787                         selected.pop_back();
 788                 }
 789
 790                 changed();
 791         }
 792 #undef old_2_new
 793 }
 794 */
 795
 796 Waypoint
 797 ValueNode_Animated::new_waypoint_at_time(const Time& time)const
 798 {
 799         Waypoint waypoint;
 800         try
 801         {
 802                 // Trivial case, we are sitting on a waypoint
 803                 waypoint=*find(time);
 804                 waypoint.make_unique();
 805         }
 806         catch(...)
 807         {
 808                 if(waypoint_list().empty())
 809                 {
 810                         waypoint.set_value((*this)(time));
 811                 }
 812                 else
 813                 {
 814                         WaypointList::const_iterator prev;
 815                         WaypointList::const_iterator next;
 816
 817                         bool has_prev(false), has_next(false);
 818
 819                         try { prev=find_prev(time); has_prev=true; } catch(...) { }
 820                         try { next=find_next(time); has_next=true; } catch(...) { }
 821
 822                         /*
 823                         WaypointList::const_iterator closest;
 824
 825                         if(has_prev&&!has_next)
 826                                 closest=prev;
 827                         else if(has_next&&!has_prev)
 828                                 closest=next;
 829                         else if(time-prev->get_time()<next->get_time()-time)
 830                                 closest=prev;
 831                         else
 832                                 closest=next;
 833
 834                         for(iter=waypoint_list().begin();iter!=waypoint_list().end();++iter)
 835                         {
 836                                 const Real dist(abs(iter->get_time()-time));
 837                                 if(dist<abs(closest->get_time()-time))
 838                                         closest=iter;
 839                         }
 840                         */
 841
 842                         if(has_prev && !prev->is_static())
 843                                 waypoint.set_value_node(prev->get_value_node());
 844                         if(has_next && !next->is_static())
 845                                 waypoint.set_value_node(next->get_value_node());
 846                         else
 847                                 waypoint.set_value((*this)(time));
 848
 849                         /*if(has_prev)
 850                                 waypoint.set_after(prev->get_before());
 851                         if(has_next)
 852                                 waypoint.set_before(next->get_after());
 853                         */
 854                 }
 855         }
 856         waypoint.set_time(time);
 857         waypoint.set_parent_value_node(const_cast<ValueNode_Animated*>(this));
 858 //      synfig::info("waypoint.get_after()=set to %d",waypoint.get_after());
 859 //      synfig::info("waypoint.get_before()=set to %d",waypoint.get_before());
 860
 861         return waypoint;
 862 }
 863
 864 ValueNode_Animated::WaypointList::iterator
 865 ValueNode_Animated::find(const UniqueID &x)
 866 {
 867         ValueNode_Animated::WaypointList::iterator iter;
 868         iter=std::find(waypoint_list().begin(),waypoint_list().end(),x);
 869         if(iter==waypoint_list().end() || iter->get_uid()!=x.get_uid())
 870                 throw Exception::NotFound(strprintf("ValueNode_Animated::find(): Can't find UniqueID %d",x.get_uid()));
 871         return iter;
 872 }
 873
 874 ValueNode_Animated::WaypointList::const_iterator
 875 ValueNode_Animated::find(const UniqueID &x)const
 876 {
 877         return const_cast<ValueNode_Animated*>(this)->find(x);
 878         /*
 879         ValueNode_Animated::WaypointList::const_iterator iter;
 880         iter=std::find(waypoint_list().begin(),waypoint_list().end(),x);
 881         if(iter!=waypoint_list().end() && iter->get_uid()!=x.get_uid())
 882                 throw Exception::NotFound(strprintf("ValueNode_Animated::find()const: Can't find UniqueID %d",x.get_uid()));
 883         return iter;
 884         */
 885 }
 886
 887 ValueNode_Animated::WaypointList::iterator
 888 ValueNode_Animated::find(const Time &x)
 889 {
 890         WaypointList::iterator iter(binary_find(waypoint_list().begin(),waypoint_list().end(),x));
 891
 892         if(iter!=waypoint_list().end() && x.is_equal(iter->get_time()))
 893                 return iter;
 894
 895         throw Exception::NotFound(strprintf("ValueNode_Animated::find(): Can't find Waypoint at %s",x.get_string().c_str()));
 896 }
 897
 898 ValueNode_Animated::WaypointList::const_iterator
 899 ValueNode_Animated::find(const Time &x)const
 900 {
 901         return const_cast<ValueNode_Animated*>(this)->find(x);
 902         /*
 903         WaypointList::const_iterator iter(binary_find(waypoint_list().begin(),waypoint_list().end(),x));
 904
 905         if(iter!=waypoint_list().end() && x.is_equal(iter->get_time()))
 906                 return iter;
 907
 908         throw Exception::NotFound(strprintf("ValueNode_Animated::find(): Can't find Waypoint at %s",x.get_string().c_str()));
 909         */
 910 }
 911
 912 ValueNode_Animated::WaypointList::iterator
 913 ValueNode_Animated::find_next(const Time &x)
 914 {
 915         WaypointList::iterator iter(binary_find(waypoint_list().begin(),waypoint_list().end(),x));
 916
 917         if(iter!=waypoint_list().end())
 918         {
 919                 if(iter->get_time().is_more_than(x))
 920                         return iter;
 921                 ++iter;
 922                 if(iter!=waypoint_list().end() && iter->get_time().is_more_than(x))
 923                         return iter;
 924         }
 925
 926         throw Exception::NotFound(strprintf("ValueNode_Animated::find_next(): Can't find Waypoint after %s",x.get_string().c_str()));
 927 }
 928
 929 ValueNode_Animated::WaypointList::const_iterator
 930 ValueNode_Animated::find_next(const Time &x)const
 931 {
 932         return const_cast<ValueNode_Animated*>(this)->find_next(x);
 933         /*
 934         WaypointList::const_iterator iter(binary_find(waypoint_list().begin(),waypoint_list().end(),x));
 935
 936         if(iter!=waypoint_list().end())
 937         {
 938                 if(iter->get_time()-Time::epsilon()>x)
 939                         return iter;
 940                 ++iter;
 941                 if(iter!=waypoint_list().end() && iter->get_time()-Time::epsilon()>x)
 942                         return iter;
 943         }
 944
 945         throw Exception::NotFound(strprintf("ValueNode_Animated::find_next(): Can't find Waypoint after %s",x.get_string().c_str()));
 946 */
 947 }
 948
 949 ValueNode_Animated::WaypointList::iterator
 950 ValueNode_Animated::find_prev(const Time &x)
 951 {
 952         WaypointList::iterator iter(binary_find(waypoint_list().begin(),waypoint_list().end(),x));
 953
 954         if(iter!=waypoint_list().end())
 955         {
 956                 if(iter->get_time().is_less_than(x))
 957                         return iter;
 958                 if(iter!=waypoint_list().begin() && (--iter)->get_time().is_less_than(x))
 959                         return iter;
 960         }
 961
 962         throw Exception::NotFound(strprintf("ValueNode_Animated::find_prev(): Can't find Waypoint after %s",x.get_string().c_str()));
 963 }
 964
 965 ValueNode_Animated::WaypointList::const_iterator
 966 ValueNode_Animated::find_prev(const Time &x)const
 967 {
 968         return const_cast<ValueNode_Animated*>(this)->find_prev(x);
 969         /*
 970         WaypointList::const_iterator iter(binary_find(waypoint_list().begin(),waypoint_list().end(),x));
 971
 972         if(iter!=waypoint_list().end())
 973         {
 974                 if(iter->get_time()+Time::epsilon()<x)
 975                         return iter;
 976                 if(iter!=waypoint_list().begin() && (--iter)->get_time()+Time::epsilon()<x)
 977                         return iter;
 978         }
 979         throw Exception::NotFound(strprintf("ValueNode_Animated::find_prev(): Can't find Waypoint after %s",x.get_string().c_str()));
 980         */
 981 }
 982
 983 void
 984 ValueNode_Animated::erase(const UniqueID &x)
 985 {
 986         waypoint_list().erase(find(x));
 987 }
 988
 989 ValueNode_Animated::WaypointList::iterator
 990 ValueNode_Animated::add(const Waypoint &x)
 991 {
 992         Waypoint waypoint(x);
 993         waypoint.set_parent_value_node(this);
 994         waypoint_list_.push_back(waypoint);
 995         //assert(waypoint_list_.back().get_parent_value_node()==this);
 996         WaypointList::iterator ret=waypoint_list_.end();
 997         --ret;
 998         changed();
 999         return ret;
1000 }
1001
1002 void
1003 ValueNode_Animated::set_type(ValueBase::Type t)
1004 {
1005         ValueNode::set_type(t);
1006 }
1007
1008 ValueNode_Animated::Handle
1009 synfig::ValueNode_Animated::create(ValueBase::Type type)
1010 {
1011         switch(type)
1012         {
1013                 case ValueBase::TYPE_TIME:
1014                         return ValueNode_Animated::Handle(new _Hermite<Time>);
1015                 case ValueBase::TYPE_REAL:
1016                         return ValueNode_Animated::Handle(new _Hermite<Vector::value_type>);
1017                 case ValueBase::TYPE_INTEGER:
1018                         return ValueNode_Animated::Handle(new _Hermite<int>);
1019                 case ValueBase::TYPE_ANGLE:
1020                         return ValueNode_Animated::Handle(new _Hermite<Angle>);
1021                 case ValueBase::TYPE_VECTOR:
1022                         return ValueNode_Animated::Handle(new _Hermite<Vector>);
1023                 case ValueBase::TYPE_COLOR:
1024                         return ValueNode_Animated::Handle(new _Hermite<Color>);
1025
1026                 case ValueBase::TYPE_STRING:
1027                         return ValueNode_Animated::Handle(new _Constant<String>);
1028                 case ValueBase::TYPE_GRADIENT:
1029                         return ValueNode_Animated::Handle(new _Hermite<Gradient>);
1030                 case ValueBase::TYPE_BOOL:
1031                         return ValueNode_Animated::Handle(new _AnimBool);
1032                 case ValueBase::TYPE_CANVAS:
1033                         return ValueNode_Animated::Handle(new _Constant<Canvas::LooseHandle>);
1034                 default:
1035                         throw
1036                                 Exception::BadType(strprintf(_("%s: You cannot use a %s in an animated ValueNode"),"synfig::ValueNode_Animated::create()",
1037                                         ValueBase::type_name(type).c_str())
1038                                 );
1039                         break;
1040         }
1041         return ValueNode_Animated::Handle();
1042 }
1043
1044 ValueNode_Animated::Handle
1045 ValueNode_Animated::create(const ValueBase& value, const Time& time)
1046 {
1047         return create(ValueNode::Handle(ValueNode_Const::create(value)),time);
1048 }
1049
1050 ValueNode_Animated::Handle
1051 ValueNode_Animated::create(ValueNode::Handle value_node, const Time& time)
1052 {
1053         ValueNode_Animated::Handle ret(create(value_node->get_type()));
1054         ret->new_waypoint(time,value_node);
1055         return ret;
1056 }
1057
1058 ValueNode_Animated::~ValueNode_Animated()
1059 {
1060 }
1061
1062 String
1063 ValueNode_Animated::get_name()const
1064 {
1065         return "animated";
1066 }
1067
1068 String
1069 ValueNode_Animated::get_local_name()const
1070 {
1071         return _("Animated");
1072 }
1073
1074 void ValueNode_Animated::get_times_vfunc(Node::time_set &set) const
1075 {
1076         //add all the way point times to the value node...
1077
1078         WaypointList::const_iterator    i = waypoint_list().begin(),
1079                                                                         end = waypoint_list().end();
1080
1081         for(; i != end; ++i)
1082         {
1083                 TimePoint t;
1084                 t.set_time(i->get_time());
1085                 t.set_before(i->get_before());
1086                 t.set_after(i->get_after());
1087                 t.set_guid(i->get_guid());
1088                 set.insert(t);
1089         }
1090 }
1091 struct timecmp
1092  {
1093         Time t;
1094
1095         timecmp(const Time &c) :t(c) {}
1096
1097         bool operator()(const Waypoint &rhs) const
1098         {
1099                 return t.is_equal(rhs.get_time());
1100         }
1101  };
1102
1103  ValueNode_Animated::findresult
1104  ValueNode_Animated::find_uid(const UniqueID &x)
1105  {
1106         findresult      f;
1107         f.second = false;
1108
1109         //search for it... and set the bool part of the return value to true if we found it!
1110         f.first = std::find(waypoint_list_.begin(), waypoint_list_.end(), x);
1111         if(f.first != waypoint_list_.end())
1112                 f.second = true;
1113
1114         return f;
1115  }
1116
1117  ValueNode_Animated::const_findresult
1118  ValueNode_Animated::find_uid(const UniqueID &x)const
1119  {
1120         const_findresult        f;
1121         f.second = false;
1122
1123         //search for it... and set the bool part of the return value to true if we found it!
1124         f.first = std::find(waypoint_list_.begin(), waypoint_list_.end(), x);
1125         if(f.first != waypoint_list_.end())
1126                 f.second = true;
1127
1128         return f;
1129  }
1130
1131  ValueNode_Animated::findresult
1132  ValueNode_Animated::find_time(const Time &x)
1133  {
1134         findresult      f;
1135         f.second = false;
1136
1137         //search for it... and set the bool part of the return value to true if we found it!
1138         f.first = std::find_if(waypoint_list_.begin(), waypoint_list_.end(), timecmp(x));
1139         if(f.first != waypoint_list_.end())
1140                 f.second = true;
1141
1142         return f;
1143  }
1144
1145 ValueNode_Animated::const_findresult
1146 ValueNode_Animated::find_time(const Time &x)const
1147 {
1148         const_findresult        f;
1149         f.second = false;
1150
1151         //search for it... and set the bool part of the return value to true if we found it!
1152         f.first = std::find_if(waypoint_list_.begin(), waypoint_list_.end(), timecmp(x));
1153         if(f.first != waypoint_list_.end())
1154                 f.second = true;
1155
1156         return f;
1157 }
1158
1159 void
1160 ValueNode_Animated::insert_time(const Time& location, const Time& delta)
1161 {
1162         if(!delta)
1163                 return;
1164         try
1165         {
1166                 WaypointList::iterator iter(find_next(location));
1167                 for(;iter!=waypoint_list().end();++iter)
1168                 {
1169                         iter->set_time(iter->get_time()+delta);
1170                 }
1171                 changed();
1172         }
1173         catch(Exception::NotFound) { }
1174 }