synfig-core/trunk/src/modules/mod_particle/plant.cpp

   1 /* === S Y N F I G ========================================================= */
   2 /*!     \file plant.cpp
   3 **      \brief Template
   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 <synfig/angle.h>
  33 #include "plant.h"
  34 #include <synfig/string.h>
  35 #include <synfig/time.h>
  36 #include <synfig/context.h>
  37 #include <synfig/paramdesc.h>
  38 #include <synfig/renddesc.h>
  39 #include <synfig/surface.h>
  40 #include <synfig/value.h>
  41 #include <synfig/valuenode.h>
  42
  43 #include <ETL/calculus>
  44 #include <ETL/bezier>
  45 #include <ETL/hermite>
  46 #include <vector>
  47
  48 #include <synfig/valuenode_bline.h>
  49
  50 #endif
  51
  52 using namespace etl;
  53
  54 /* === M A C R O S ========================================================= */
  55
  56 #define SAMPLES         300
  57 #define ROUND_END_FACTOR        (4)
  58 #define CUSP_THRESHOLD          (0.15)
  59 #define NO_LOOP_COOKIE          synfig::Vector(84951305,7836658)
  60 #define EPSILON                         (0.000000001)
  61 #define CUSP_TANGENT_ADJUST     (0.025)
  62
  63 /* === G L O B A L S ======================================================= */
  64
  65 SYNFIG_LAYER_INIT(Plant);
  66 SYNFIG_LAYER_SET_NAME(Plant,"plant");
  67 SYNFIG_LAYER_SET_LOCAL_NAME(Plant,_("Plant"));
  68 SYNFIG_LAYER_SET_CATEGORY(Plant,_("Other"));
  69 SYNFIG_LAYER_SET_VERSION(Plant,"0.1");
  70 SYNFIG_LAYER_SET_CVS_ID(Plant,"$Id$");
  71
  72 /* === P R O C E D U R E S ================================================= */
  73
  74 /* === M E T H O D S ======================================================= */
  75
  76
  77 Plant::Plant():
  78         split_angle(Angle::deg(10)),
  79         gravity(0,-0.1),
  80         velocity(0.3),
  81         perp_velocity(0.0),
  82         step(0.01),
  83         sprouts(10)
  84 {
  85         bounding_rect=Rect::zero();
  86         random_factor=0.2;
  87         random.set_seed(time(NULL));
  88
  89         bline.push_back(BLinePoint());
  90         bline.push_back(BLinePoint());
  91         bline.push_back(BLinePoint());
  92         bline[0].set_vertex(Point(0,1));
  93         bline[1].set_vertex(Point(0,-1));
  94         bline[2].set_vertex(Point(1,0));
  95         bline[0].set_tangent(bline[1].get_vertex()-bline[2].get_vertex()*0.5f);
  96         bline[1].set_tangent(bline[2].get_vertex()-bline[0].get_vertex()*0.5f);
  97         bline[2].set_tangent(bline[0].get_vertex()-bline[1].get_vertex()*0.5f);
  98         bline[0].set_width(1.0f);
  99         bline[1].set_width(1.0f);
 100         bline[2].set_width(1.0f);
 101         bline_loop=true;
 102         mass=(0.5);
 103         splits=5;
 104         drag=0.1;
 105         size=0.015;
 106         needs_sync_=true;
 107         sync();
 108         size_as_alpha=false;
 109 }
 110
 111 void
 112 Plant::branch(int n,int depth,float t, float stunt_growth, synfig::Point position,synfig::Vector vel)const
 113 {
 114         float next_split((1.0-t)/(splits-depth)+t/*+random_factor*random(40+depth,t*splits,0,0)/splits*/);
 115         for(;t<next_split;t+=step)
 116         {
 117                 vel[0]+=gravity[0]*step;
 118                 vel[1]+=gravity[1]*step;
 119                 vel*=(1.0-(drag)*step);
 120                 position[0]+=vel[0]*step;
 121                 position[1]+=vel[1]*step;
 122
 123                 particle_list.push_back(Particle(position, gradient(t)));
 124                 if (particle_list.size() % 1000000 == 0)
 125                         synfig::info("constructed %d million particles...", particle_list.size()/1000000);
 126
 127                 bounding_rect.expand(position);
 128         }
 129
 130         if(t>=1.0-stunt_growth)return;
 131
 132         synfig::Real sin_v=synfig::Angle::cos(split_angle).get();
 133         synfig::Real cos_v=synfig::Angle::sin(split_angle).get();
 134
 135         synfig::Vector velocity1(vel[0]*sin_v - vel[1]*cos_v + random_factor*random(Random::SMOOTH_COSINE, 30+n+depth, t*splits, 0.0f, 0.0f),
 136                                                          vel[0]*cos_v + vel[1]*sin_v + random_factor*random(Random::SMOOTH_COSINE, 32+n+depth, t*splits, 0.0f, 0.0f));
 137         synfig::Vector velocity2(vel[0]*sin_v + vel[1]*cos_v + random_factor*random(Random::SMOOTH_COSINE, 31+n+depth, t*splits, 0.0f, 0.0f),
 138                                                         -vel[0]*cos_v + vel[1]*sin_v + random_factor*random(Random::SMOOTH_COSINE, 33+n+depth, t*splits, 0.0f, 0.0f));
 139
 140         Plant::branch(n,depth+1,t,stunt_growth,position,velocity1);
 141         Plant::branch(n,depth+1,t,stunt_growth,position,velocity2);
 142 }
 143
 144 void
 145 Plant::calc_bounding_rect()const
 146 {
 147         std::vector<synfig::BLinePoint>::const_iterator iter,next;
 148
 149         bounding_rect=Rect::zero();
 150
 151         // Bline must have at least 2 points in it
 152         if(bline.size()<2)
 153                 return;
 154
 155         next=bline.begin();
 156
 157         if(bline_loop)
 158                 iter=--bline.end();
 159         else
 160                 iter=next++;
 161
 162         for(;next!=bline.end();iter=next++)
 163         {
 164                 bounding_rect.expand(iter->get_vertex());
 165                 bounding_rect.expand(next->get_vertex());
 166                 bounding_rect.expand(iter->get_vertex()+iter->get_tangent2()*0.3333333333333);
 167                 bounding_rect.expand(next->get_vertex()-next->get_tangent1()*0.3333333333333);
 168                 bounding_rect.expand(next->get_vertex()+next->get_tangent2()*velocity);
 169         }
 170         bounding_rect.expand_x(gravity[0]);
 171         bounding_rect.expand_y(gravity[1]);
 172         bounding_rect.expand_x(size);
 173         bounding_rect.expand_y(size);
 174 }
 175
 176 void
 177 Plant::sync()const
 178 {
 179         Mutex::Lock lock(mutex);
 180         if (!needs_sync_) return;
 181         time_t start_time; time(&start_time);
 182         particle_list.clear();
 183
 184         bounding_rect=Rect::zero();
 185
 186         // Bline must have at least 2 points in it
 187         if(bline.size()<2)
 188         {
 189                 needs_sync_=false;
 190                 return;
 191         }
 192
 193         std::vector<synfig::BLinePoint>::const_iterator iter,next;
 194
 195         etl::hermite<Vector> curve;
 196
 197         Real step(abs(this->step));
 198
 199         int seg(0);
 200
 201         next=bline.begin();
 202
 203         if(bline_loop)  iter=--bline.end(); // iter is the last  bline in the list; next is the first  bline in the list
 204         else                    iter=next++;            // iter is the first bline in the list; next is the second bline in the list
 205
 206         // loop through the bline; seg counts the blines as we do so; stop before iter is the last bline in the list
 207         for(;next!=bline.end();iter=next++,seg++)
 208         {
 209                 curve.p1()=iter->get_vertex();
 210                 curve.t1()=iter->get_tangent2();
 211                 curve.p2()=next->get_vertex();
 212                 curve.t2()=next->get_tangent1();
 213                 curve.sync();
 214                 etl::derivative<etl::hermite<Vector> > deriv(curve);
 215
 216                 Real f;
 217
 218                 int i=0, branch_count = 0, steps = round_to_int(1.0/step);
 219                 for(f=0.0;f<1.0;f+=step,i++)
 220                 {
 221                         Point point(curve(f));
 222
 223                         particle_list.push_back(Particle(point, gradient(0)));
 224                         if (particle_list.size() % 1000000 == 0)
 225                                 synfig::info("constructed %d million particles...", particle_list.size()/1000000);
 226
 227                         bounding_rect.expand(point);
 228
 229                         Real stunt_growth(random_factor * (random(Random::SMOOTH_COSINE,i,f+seg,0.0f,0.0f)/2.0+0.5));
 230                         stunt_growth*=stunt_growth;
 231
 232                         if((((i+1)*sprouts + steps/2) / steps) > branch_count) {
 233                                 Vector branch_velocity(deriv(f).norm()*velocity + deriv(f).perp().norm()*perp_velocity);
 234
 235                                 branch_velocity[0] += random_factor * random(Random::SMOOTH_COSINE, 1, f*splits, 0.0f, 0.0f);
 236                                 branch_velocity[1] += random_factor * random(Random::SMOOTH_COSINE, 2, f*splits, 0.0f, 0.0f);
 237
 238                                 branch_count++;
 239                                 branch(i, 0, 0,          // time
 240                                            stunt_growth, // stunt growth
 241                                            point, branch_velocity);
 242                         }
 243                 }
 244         }
 245
 246         time_t end_time; time(&end_time);
 247         if (end_time-start_time > 4)
 248                 synfig::info("Plant::sync() constructed %d particles in %d seconds\n",
 249                                          particle_list.size(), int(end_time-start_time));
 250         needs_sync_=false;
 251 }
 252
 253 bool
 254 Plant::set_param(const String & param, const ValueBase &value)
 255 {
 256         if(param=="bline" && value.get_type()==ValueBase::TYPE_LIST)
 257         {
 258                 bline=value;
 259                 bline_loop=value.get_loop();
 260                 needs_sync_=true;
 261
 262                 return true;
 263         }
 264         if(param=="seed" && value.same_type_as(int()))
 265         {
 266                 random.set_seed(value.get(int()));
 267                 needs_sync_=true;
 268                 return true;
 269         }
 270         IMPORT_PLUS(split_angle,needs_sync_=true);
 271         IMPORT_PLUS(gravity,needs_sync_=true);
 272         IMPORT_PLUS(gradient,needs_sync_=true);
 273         IMPORT_PLUS(velocity,needs_sync_=true);
 274         IMPORT_PLUS(perp_velocity,needs_sync_=true);
 275         IMPORT_PLUS(step,needs_sync_=true);
 276         IMPORT_PLUS(splits,needs_sync_=true);
 277         IMPORT_PLUS(sprouts,needs_sync_=true);
 278         IMPORT_PLUS(random_factor,needs_sync_=true);
 279         IMPORT_PLUS(drag,needs_sync_=true);
 280         IMPORT(size);
 281         IMPORT(size_as_alpha);
 282
 283         return Layer_Composite::set_param(param,value);
 284 }
 285 /*
 286 void
 287 Plant::set_time(Context context, Time time)const
 288 {
 289         if(needs_sync==true)
 290         {
 291                 sync();
 292                 needs_sync_=false;
 293         }
 294         //const_cast<Plant*>(this)->sync();
 295         context.set_time(time);
 296 }
 297
 298 void
 299 Plant::set_time(Context context, Time time, Vector pos)const
 300 {
 301         if(needs_sync==true)
 302         {
 303                 sync();
 304                 needs_sync_=false;
 305         }
 306         //const_cast<Plant*>(this)->sync();
 307         context.set_time(time,pos);
 308 }
 309 */
 310 ValueBase
 311 Plant::get_param(const String& param)const
 312 {
 313         if(param=="seed")
 314                 return random.get_seed();
 315         EXPORT(bline);
 316         EXPORT(split_angle);
 317         EXPORT(gravity);
 318         EXPORT(velocity);
 319         EXPORT(perp_velocity);
 320         EXPORT(step);
 321         EXPORT(gradient);
 322         EXPORT(splits);
 323         EXPORT(sprouts);
 324         EXPORT(random_factor);
 325         EXPORT(drag);
 326         EXPORT(size);
 327
 328         EXPORT(size_as_alpha);
 329
 330         EXPORT_NAME();
 331         EXPORT_VERSION();
 332
 333         return Layer_Composite::get_param(param);
 334 }
 335
 336 Layer::Vocab
 337 Plant::get_param_vocab()const
 338 {
 339         Layer::Vocab ret(Layer_Composite::get_param_vocab());
 340
 341         ret.push_back(ParamDesc("bline")
 342                 .set_local_name(_("Vertices"))
 343                 .set_description(_("A list of BLine Points"))
 344                 //.set_origin("offset")
 345                 //.set_scalar("width")
 346         );
 347
 348         ret.push_back(ParamDesc("gradient")
 349                 .set_local_name(_("Gradient"))
 350                 .set_description(_("Gradient to be used for coloring the plant"))
 351         );
 352
 353         ret.push_back(ParamDesc("split_angle")
 354                 .set_local_name(_("Split Angle"))
 355                 .set_description(_("Angle by which each split deviates from its parent"))
 356         );
 357
 358         ret.push_back(ParamDesc("gravity")
 359                 .set_local_name(_("Gravity"))
 360                 .set_description(_("Direction in which the shoots tend to face"))
 361                 .set_is_distance()
 362         );
 363
 364         ret.push_back(ParamDesc("velocity")
 365                 .set_local_name(_("Tangential Velocity"))
 366                 .set_description(_("Amount to which shoots tend to grow along the tangent to the BLine"))
 367         );
 368
 369         ret.push_back(ParamDesc("perp_velocity")
 370                 .set_local_name(_("Perpendicular Velocity"))
 371                 .set_description(_("Amount to which shoots tend to grow perpendicular to the tangent to the BLine"))
 372         );
 373
 374         ret.push_back(ParamDesc("size")
 375                 .set_local_name(_("Stem Size"))
 376                 .set_description(_("Size of the stem"))
 377                 .set_is_distance()
 378         );
 379
 380         ret.push_back(ParamDesc("size_as_alpha")
 381                 .set_local_name(_("Size As Alpha"))
 382                 .set_description(_("If enabled, the alpha channel from the gradient is multiplied by the stem size, and an alpha of 1.0 is used when rendering"))
 383         );
 384
 385         ret.push_back(ParamDesc("step")
 386                 .set_local_name(_("Step"))
 387                 .set_description(_("Measure of the distance between points when rendering"))
 388         );
 389
 390         ret.push_back(ParamDesc("seed")
 391                 .set_local_name(_("Seed"))
 392                 .set_description(_("Used to seed the pseudo-random number generator"))
 393         );
 394
 395         ret.push_back(ParamDesc("splits")
 396                 .set_local_name(_("Splits"))
 397                 .set_description(_("Maximum number of times that each sprout can sprout recursively"))
 398         );
 399
 400         ret.push_back(ParamDesc("sprouts")
 401                 .set_local_name(_("Sprouts"))
 402                 .set_description(_("Number of places that growth occurs on each bline section"))
 403         );
 404
 405         ret.push_back(ParamDesc("random_factor")
 406                 .set_local_name(_("Random Factor"))
 407                 .set_description(_("Used to scale down all random effects.  Set to zero to disable randomness"))
 408         );
 409
 410         ret.push_back(ParamDesc("drag")
 411                 .set_local_name(_("Drag"))
 412                 .set_description(_("Drag slows the growth"))
 413         );
 414
 415         return ret;
 416 }
 417
 418 bool
 419 Plant::accelerated_render(Context context,Surface *surface,int quality, const RendDesc &renddesc, ProgressCallback *cb)const
 420 {
 421         bool ret(context.accelerated_render(surface,quality,renddesc,cb));
 422         if(is_disabled() || !ret)
 423                 return ret;
 424
 425         Surface dest_surface;
 426         dest_surface.set_wh(surface->get_w(),surface->get_h());
 427         dest_surface.clear();
 428
 429         const Point     tl(renddesc.get_tl());
 430         const Point br(renddesc.get_br());
 431
 432         const int       w(renddesc.get_w());
 433         const int       h(renddesc.get_h());
 434
 435         const int       surface_width(surface->get_w());
 436         const int       surface_height(surface->get_h());
 437
 438         // Width and Height of a pixel
 439         const Real pw = (br[0] - tl[0]) / w;
 440         const Real ph = (br[1] - tl[1]) / h;
 441
 442         if(needs_sync_==true)
 443                 sync();
 444
 445         std::vector<Particle>::reverse_iterator iter;
 446
 447         float radius(size*sqrt(1.0f/(abs(pw)*abs(ph))));
 448
 449         int x1,y1,x2,y2;
 450         for(iter=particle_list.rbegin();iter!=particle_list.rend();++iter)
 451         {
 452                 float scaled_radius(radius);
 453                 Color color(iter->color);
 454                 if(size_as_alpha)
 455                 {
 456                         scaled_radius*=color.get_a();
 457                         color.set_a(1);
 458                 }
 459
 460                 // previously, radius was multiplied by sqrt(step)*12 only if
 461                 // the radius came out at less than 1 (pixel):
 462                 //   if (radius<=1.0f) radius*=sqrt(step)*12.0f;
 463                 // seems a little arbitrary - does it help?
 464
 465                 // calculate the box that this particle will be drawn as
 466                 float x1f=(iter->point[0]-tl[0])/pw-(scaled_radius*0.5);
 467                 float x2f=(iter->point[0]-tl[0])/pw+(scaled_radius*0.5);
 468                 float y1f=(iter->point[1]-tl[1])/ph-(scaled_radius*0.5);
 469                 float y2f=(iter->point[1]-tl[1])/ph+(scaled_radius*0.5);
 470                 x1=ceil_to_int(x1f);
 471                 x2=ceil_to_int(x2f)-1;
 472                 y1=ceil_to_int(y1f);
 473                 y2=ceil_to_int(y2f)-1;
 474
 475                 // if the box is entirely off the canvas, go to the next particle
 476                 if(x1>surface_width || y1>surface_height || x2<0 || y2<0) continue;
 477
 478                 float x1e=x1-x1f, x2e=x2f-x2, y1e=y1-y1f, y2e=y2f-y2;
 479                 // printf("x1e %.4f x2e %.4f y1e %.4f y2e %.4f\n", x1e, x2e, y1e, y2e);
 480
 481                 // adjust the box so it's entirely on the canvas
 482                 if(x1<=0) { x1=0; x1e=0; }
 483                 if(y1<=0) { y1=0; y1e=0; }
 484                 if(x2>=surface_width)  { x2=surface_width;  x2e=0; }
 485                 if(y2>=surface_height) { y2=surface_height; y2e=0; }
 486
 487                 int w(x2-x1), h(y2-y1);
 488
 489                 Surface::alpha_pen surface_pen(dest_surface.get_pen(x1,y1),1.0f);
 490                 if(w>0 && h>0)
 491                         dest_surface.fill(color,surface_pen,w,h);
 492
 493                 /* the rectangle doesn't cross any vertical pixel boundaries so we don't
 494                  * need to draw any top or bottom edges
 495                  */
 496                 if(x2<x1)
 497                 {
 498                         // case 1 - a single pixel
 499                         if(y2<y1)
 500                         {
 501                                 surface_pen.move_to(x2,y2);
 502                                 surface_pen.set_alpha((x2f-x1f)*(y2f-y1f));
 503                                 surface_pen.put_value(color);
 504                         }
 505                         // case 2 - a single vertical column of pixels
 506                         else
 507                         {
 508                                 surface_pen.move_to(x2,y1-1);
 509                                 if (y1e!=0)     // maybe draw top pixel
 510                                 {
 511                                         surface_pen.set_alpha(y1e*(x2f-x1f));
 512                                         surface_pen.put_value(color);
 513                                 }
 514                                 surface_pen.inc_y();
 515                                 surface_pen.set_alpha(x2f-x1f);
 516                                 for(int i=y1; i<y2; i++) // maybe draw pixels between
 517                                 {
 518                                         surface_pen.put_value(color);
 519                                         surface_pen.inc_y();
 520                                 }
 521                                 if (y2e!=0)     // maybe draw bottom pixel
 522                                 {
 523                                         surface_pen.set_alpha(y2e*(x2f-x1f));
 524                                         surface_pen.put_value(color);
 525                                 }
 526                         }
 527                 }
 528                 else
 529                 {
 530                         // case 3 - a single horizontal row of pixels
 531                         if(y2<y1)
 532                         {
 533                                 surface_pen.move_to(x1-1,y2);
 534                                 if (x1e!=0)     // maybe draw left pixel
 535                                 {
 536                                         surface_pen.set_alpha(x1e*(y2f-y1f));
 537                                         surface_pen.put_value(color);
 538                                 }
 539                                 surface_pen.inc_x();
 540                                 surface_pen.set_alpha(y2f-y1f);
 541                                 for(int i=x1; i<x2; i++) // maybe draw pixels between
 542                                 {
 543                                         surface_pen.put_value(color);
 544                                         surface_pen.inc_x();
 545                                 }
 546                                 if (x2e!=0)     // maybe draw right pixel
 547                                 {
 548                                         surface_pen.set_alpha(x2e*(y2f-y1f));
 549                                         surface_pen.put_value(color);
 550                                 }
 551                         }
 552                         // case 4 - a proper block of pixels
 553                         else
 554                         {
 555                                 if (x1e!=0)     // maybe draw left edge
 556                                 {
 557                                         surface_pen.move_to(x1-1,y1-1);
 558                                         if (y1e!=0)     // maybe draw top left pixel
 559                                         {
 560                                                 surface_pen.set_alpha(x1e*y1e);
 561                                                 surface_pen.put_value(color);
 562                                         }
 563                                         surface_pen.inc_y();
 564                                         surface_pen.set_alpha(x1e);
 565                                         for(int i=y1; i<y2; i++) // maybe draw pixels along the left edge
 566                                         {
 567                                                 surface_pen.put_value(color);
 568                                                 surface_pen.inc_y();
 569                                         }
 570                                         if (y2e!=0)     // maybe draw bottom left pixel
 571                                         {
 572                                                 surface_pen.set_alpha(x1e*y2e);
 573                                                 surface_pen.put_value(color);
 574                                         }
 575                                         surface_pen.inc_x();
 576                                 }
 577                                 else
 578                                         surface_pen.move_to(x1,y2);
 579
 580                                 if (y2e!=0)     // maybe draw bottom edge
 581                                 {
 582                                         surface_pen.set_alpha(y2e);
 583                                         for(int i=x1; i<x2; i++) // maybe draw pixels along the bottom edge
 584                                         {
 585                                                 surface_pen.put_value(color);
 586                                                 surface_pen.inc_x();
 587                                         }
 588                                         if (x2e!=0)     // maybe draw bottom right pixel
 589                                         {
 590                                                 surface_pen.set_alpha(x2e*y2e);
 591                                                 surface_pen.put_value(color);
 592                                         }
 593                                         surface_pen.dec_y();
 594                                 }
 595                                 else
 596                                         surface_pen.move_to(x2,y2-1);
 597
 598                                 if (x2e!=0)     // maybe draw right edge
 599                                 {
 600                                         surface_pen.set_alpha(x2e);
 601                                         for(int i=y1; i<y2; i++) // maybe draw pixels along the right edge
 602                                         {
 603                                                 surface_pen.put_value(color);
 604                                                 surface_pen.dec_y();
 605                                         }
 606                                         if (y1e!=0)     // maybe draw top right pixel
 607                                         {
 608                                                 surface_pen.set_alpha(x2e*y1e);
 609                                                 surface_pen.put_value(color);
 610                                         }
 611                                         surface_pen.dec_x();
 612                                 }
 613                                 else
 614                                         surface_pen.move_to(x2-1,y1-1);
 615
 616                                 if (y1e!=0)     // maybe draw top edge
 617                                 {
 618                                         surface_pen.set_alpha(y1e);
 619                                         for(int i=x1; i<x2; i++) // maybe draw pixels along the top edge
 620                                         {
 621                                                 surface_pen.put_value(color);
 622                                                 surface_pen.dec_x();
 623                                         }
 624                                 }
 625                         }
 626                 }
 627         }
 628
 629         Surface::alpha_pen pen(surface->get_pen(0,0),get_amount(),get_blend_method());
 630         dest_surface.blit_to(pen);
 631
 632         return true;
 633 }
 634
 635 Rect
 636 Plant::get_bounding_rect(Context context)const
 637 {
 638         if(needs_sync_==true)
 639                 sync();
 640
 641         if(is_disabled())
 642                 return Rect::zero();
 643
 644         if(Color::is_onto(get_blend_method()))
 645                 return context.get_full_bounding_rect() & bounding_rect;
 646
 647         //if(get_blend_method()==Color::BLEND_BEHIND)
 648         //      return context.get_full_bounding_rect() | bounding_rect;
 649         return bounding_rect;
 650 }