src/scene-manager.cpp

   1 /* guile-irrlicht --- GNU Guile bindings for Irrlicht Engine
   2
   3    Copyright (C) 2020 Javier Sancho <jsf@jsancho.org>
   4
   5    This file is part of guile-irrlicht.
   6
   7    guile-irrlicht is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU Lesser General Public License as
   9    published by the Free Software Foundation; either version 3 of the
  10    License, or (at your option) any later version.
  11
  12    guile-irrlicht is distributed in the hope that it will be useful, but
  13    WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15    General Public License for more details.
  16
  17    You should have received a copy of the GNU Lesser General Public
  18    License along with guile-irrlicht. If not, see
  19    <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include <irrlicht/irrlicht.h>
  23 #include <libguile.h>
  24
  25 #include "animated-mesh.h"
  26 #include "animated-mesh-scene-node.h"
  27 #include "box3d.h"
  28 #include "camera-scene-node.h"
  29 #include "device.h"
  30 #include "keymap.h"
  31 #include "material.h"
  32 #include "mesh.h"
  33 #include "mesh-scene-node.h"
  34 #include "scene-manager.h"
  35 #include "scene-node.h"
  36 #include "scene-node-animator.h"
  37 #include "vector3d.h"
  38 #include "wrapped.h"
  39
  40 extern "C" {
  41
  42   void
  43   init_scene_manager (void)
  44   {
  45     init_scene_manager_type ();
  46     scm_c_define_gsubr ("add-animated-mesh-scene-node!", 2, 0, 1,
  47                         (scm_t_subr)irr_scene_addAnimatedMeshSceneNode);
  48     scm_c_define_gsubr ("add-camera-scene-node!", 1, 0, 1,
  49                         (scm_t_subr)irr_scene_addCameraSceneNode);
  50     scm_c_define_gsubr ("add-camera-scene-node-fps!", 1, 0, 1,
  51                         (scm_t_subr)irr_scene_addCameraSceneNodeFPS);
  52     scm_c_define_gsubr ("add-cube-scene-node!", 1, 0, 1,
  53                         (scm_t_subr)irr_scene_addCubeSceneNode);
  54     scm_c_define_gsubr ("add-custom-scene-node!", 5, 0, 1,
  55                         (scm_t_subr)irr_scene_addCustomSceneNode);
  56     scm_c_define_gsubr ("add-octree-scene-node!", 2, 0, 1,
  57                         (scm_t_subr)irr_scene_addOctreeSceneNode);
  58     scm_c_define_gsubr ("add-sphere-scene-node!", 1, 0, 1,
  59                         (scm_t_subr)irr_scene_addSphereSceneNode);
  60     scm_c_define_gsubr ("create-fly-circle-animator", 1, 0, 1,
  61                         (scm_t_subr)irr_scene_createFlyCircleAnimator);
  62     scm_c_define_gsubr ("create-fly-straight-animator", 4, 0, 1,
  63                         (scm_t_subr)irr_scene_createFlyStraightAnimator);
  64     scm_c_define_gsubr ("create-rotation-animator", 2, 0, 0,
  65                         (scm_t_subr)irr_scene_createRotationAnimator);
  66     scm_c_define_gsubr ("get-mesh", 2, 0, 0, (scm_t_subr)irr_scene_getMesh);
  67     scm_c_define_gsubr ("get-root-scene-node", 1, 0, 0, (scm_t_subr)irr_scene_getRootSceneNode);
  68     scm_c_define_gsubr ("get-scene-manager", 1, 0, 0, (scm_t_subr)irr_getSceneManager);
  69     scm_c_export ("add-animated-mesh-scene-node!", "add-camera-scene-node!",
  70                   "add-camera-scene-node-fps!", "add-custom-scene-node!", "add-cube-scene-node!",
  71                   "add-octree-scene-node!", "add-sphere-scene-node!", "create-fly-circle-animator",
  72                   "create-fly-straight-animator", "create-rotation-animator", "get-mesh",
  73                   "get-root-scene-node", "get-scene-manager", NULL);
  74   }
  75
  76   DEFINE_WRAPPED_TYPE (irr::scene::ISceneManager*, "scene-manager",
  77                        init_scene_manager_type, scene_manager_p,
  78                        wrap_scene_manager, unwrap_scene_manager);
  79
  80   SCM
  81   irr_scene_addAnimatedMeshSceneNode (SCM wrapped_scene_manager,
  82                                       SCM mesh,
  83                                       SCM rest)
  84   {
  85     SCM parent = scm_from_bool (0);
  86     SCM id = scm_from_int32 (-1);
  87     SCM position = scm_list_3 (scm_from_double (0),
  88                                scm_from_double (0),
  89                                scm_from_double (0));
  90     SCM rotation = scm_list_3 (scm_from_double (0),
  91                                scm_from_double (0),
  92                                scm_from_double (0));
  93     SCM scale = scm_list_3 (scm_from_double (1),
  94                             scm_from_double (1),
  95                             scm_from_double (1));
  96     SCM also_add_if_mesh_pointer_zero = scm_from_bool (0);
  97
  98     scm_c_bind_keyword_arguments ("add-animated-mesh-scene-node!", rest, (scm_t_keyword_arguments_flags)0,
  99                                   scm_from_utf8_keyword ("parent"), &parent,
 100                                   scm_from_utf8_keyword ("id"), &id,
 101                                   scm_from_utf8_keyword ("position"), &position,
 102                                   scm_from_utf8_keyword ("rotation"), &rotation,
 103                                   scm_from_utf8_keyword ("scale"), &scale,
 104                                   scm_from_utf8_keyword ("also-add-if-mesh-pointer-zero"), &also_add_if_mesh_pointer_zero,
 105                                   SCM_UNDEFINED);
 106
 107     irr::scene::ISceneManager* smgr = unwrap_scene_manager (wrapped_scene_manager);
 108     irr::scene::IAnimatedMeshSceneNode* node =
 109       smgr->addAnimatedMeshSceneNode (unwrap_animated_mesh (mesh),
 110                                       scm_is_false (parent) ? 0 : unwrap_scene_node (parent),
 111                                       scm_to_int32 (id),
 112                                       scm_to_vector3df (position),
 113                                       scm_to_vector3df (rotation),
 114                                       scm_to_vector3df (scale),
 115                                       scm_to_bool (also_add_if_mesh_pointer_zero));
 116     return wrap_animated_mesh_scene_node (node);
 117   }
 118
 119   SCM
 120   irr_scene_addCameraSceneNode (SCM wrapped_scene_manager,
 121                                 SCM rest)
 122   {
 123     SCM parent = scm_from_bool (0);
 124     SCM position = scm_list_3 (scm_from_double (0),
 125                                scm_from_double (0),
 126                                scm_from_double (0));
 127     SCM lookat = scm_list_3 (scm_from_double (0),
 128                              scm_from_double (0),
 129                              scm_from_double (100));
 130     SCM id = scm_from_int32 (-1);
 131     SCM make_active = scm_from_bool (1);
 132
 133     scm_c_bind_keyword_arguments ("add-camera-scene-node!", rest, (scm_t_keyword_arguments_flags)0,
 134                                   scm_from_utf8_keyword ("parent"), &parent,
 135                                   scm_from_utf8_keyword ("position"), &position,
 136                                   scm_from_utf8_keyword ("lookat"), &lookat,
 137                                   scm_from_utf8_keyword ("id"), &id,
 138                                   scm_from_utf8_keyword ("make-active"), &make_active,
 139                                   SCM_UNDEFINED);
 140
 141     irr::scene::ISceneManager* scene_manager = unwrap_scene_manager (wrapped_scene_manager);
 142     irr::scene::ICameraSceneNode* camera =
 143       scene_manager->addCameraSceneNode (scm_is_false (parent) ? 0 : unwrap_scene_node (parent),
 144                                          scm_to_vector3df (position),
 145                                          scm_to_vector3df (lookat),
 146                                          scm_to_int32 (id),
 147                                          scm_to_bool (make_active));
 148     return wrap_camera_scene_node (camera);
 149   }
 150
 151   SCM
 152   irr_scene_addCameraSceneNodeFPS (SCM wrapped_scene_manager,
 153                                    SCM rest)
 154   {
 155     SCM parent = scm_from_bool (0);
 156     SCM rotate_speed = scm_from_double (100);
 157     SCM move_speed = scm_from_double (0.5);
 158     SCM id = scm_from_int32 (-1);
 159     SCM key_map_array = scm_from_bool (0);
 160     SCM key_map_size = scm_from_int32 (0);
 161     SCM no_vertical_movement = scm_from_bool (0);
 162     SCM jump_speed = scm_from_double (0);
 163     SCM invert_mouse = scm_from_bool (0);
 164     SCM make_active = scm_from_bool (1);
 165
 166     scm_c_bind_keyword_arguments ("add-camera-scene-node-fps!", rest, (scm_t_keyword_arguments_flags)0,
 167                                   scm_from_utf8_keyword ("parent"), &parent,
 168                                   scm_from_utf8_keyword ("rotate-speed"), &rotate_speed,
 169                                   scm_from_utf8_keyword ("move-speed"), &move_speed,
 170                                   scm_from_utf8_keyword ("id"), &id,
 171                                   scm_from_utf8_keyword ("key-map-array"), &key_map_array,
 172                                   scm_from_utf8_keyword ("key-map-size"), &key_map_size,
 173                                   scm_from_utf8_keyword ("no-vertical-movement"), &no_vertical_movement,
 174                                   scm_from_utf8_keyword ("jump-speed"), &jump_speed,
 175                                   scm_from_utf8_keyword ("invert-mouse"), &invert_mouse,
 176                                   scm_from_utf8_keyword ("make-active"), &make_active,
 177                                   SCM_UNDEFINED);
 178
 179     irr::scene::ISceneManager* scene_manager = unwrap_scene_manager (wrapped_scene_manager);
 180     irr::scene::ICameraSceneNode* camera =
 181       scene_manager->addCameraSceneNodeFPS (scm_is_false (parent) ? 0 : unwrap_scene_node (parent),
 182                                             scm_to_double (rotate_speed),
 183                                             scm_to_double (move_speed),
 184                                             scm_to_int32 (id),
 185                                             scm_is_false (key_map_array) ? 0 : unwrap_keymap (key_map_array),
 186                                             scm_to_int32 (key_map_size),
 187                                             scm_to_bool (no_vertical_movement),
 188                                             scm_to_double (jump_speed),
 189                                             scm_to_bool (invert_mouse),
 190                                             scm_to_bool (make_active));
 191     return wrap_camera_scene_node (camera);
 192   }
 193
 194   SCM
 195   irr_scene_addCubeSceneNode (SCM wrapped_scene_manager,
 196                               SCM rest)
 197   {
 198     SCM size = scm_from_double (10);
 199     SCM parent = scm_from_bool (0);
 200     SCM id = scm_from_int32 (-1);
 201     SCM position = scm_list_3 (scm_from_double (0),
 202                                scm_from_double (0),
 203                                scm_from_double (0));
 204     SCM rotation = scm_list_3 (scm_from_double (0),
 205                                scm_from_double (0),
 206                                scm_from_double (0));
 207     SCM scale = scm_list_3 (scm_from_double (1),
 208                             scm_from_double (1),
 209                             scm_from_double (1));
 210
 211     scm_c_bind_keyword_arguments ("add-cube-scene-node!", rest, (scm_t_keyword_arguments_flags)0,
 212                                   scm_from_utf8_keyword ("size"), &size,
 213                                   scm_from_utf8_keyword ("parent"), &parent,
 214                                   scm_from_utf8_keyword ("id"), &id,
 215                                   scm_from_utf8_keyword ("position"), &position,
 216                                   scm_from_utf8_keyword ("rotation"), &rotation,
 217                                   scm_from_utf8_keyword ("scale"), &scale,
 218                                   SCM_UNDEFINED);
 219
 220     irr::scene::ISceneManager* smgr = unwrap_scene_manager (wrapped_scene_manager);
 221     irr::scene::IMeshSceneNode* node =
 222       smgr->addCubeSceneNode (scm_to_double (size),
 223                               scm_is_false (parent) ? 0 : unwrap_scene_node (parent),
 224                               scm_to_int32 (id),
 225                               scm_to_vector3df (position),
 226                               scm_to_vector3df (rotation),
 227                               scm_to_vector3df (scale));
 228     return wrap_mesh_scene_node (node);
 229   }
 230
 231   SCM
 232   irr_scene_addCustomSceneNode (SCM wrapped_scene_manager,
 233                                 SCM proc_render,
 234                                 SCM proc_get_bounding_box,
 235                                 SCM proc_get_material_count,
 236                                 SCM proc_get_material,
 237                                 SCM rest)
 238   {
 239     irr::scene::ISceneManager* scene_manager = unwrap_scene_manager (wrapped_scene_manager);
 240
 241     SCM parent = wrap_scene_node (scene_manager->getRootSceneNode ());
 242     SCM id = scm_from_int32 (-1);
 243     SCM position = scm_list_3 (scm_from_double (0),
 244                                scm_from_double (0),
 245                                scm_from_double (0));
 246     SCM rotation = scm_list_3 (scm_from_double (0),
 247                                scm_from_double (0),
 248                                scm_from_double (0));
 249     SCM scale = scm_list_3 (scm_from_double (1),
 250                             scm_from_double (1),
 251                             scm_from_double (1));
 252
 253     scm_c_bind_keyword_arguments ("add-custom-scene-node!", rest, (scm_t_keyword_arguments_flags)0,
 254                                   scm_from_utf8_keyword ("parent"), &parent,
 255                                   scm_from_utf8_keyword ("id"), &id,
 256                                   scm_from_utf8_keyword ("position"), &position,
 257                                   scm_from_utf8_keyword ("rotation"), &rotation,
 258                                   scm_from_utf8_keyword ("scale"), &scale,
 259                                   SCM_UNDEFINED);
 260
 261     class CustomSceneNode : public irr::scene::ISceneNode
 262     {
 263       SCM scm_render;
 264       SCM scm_get_bounding_box;
 265       SCM scm_get_material_count;
 266       SCM scm_get_material;
 267
 268     public:
 269       CustomSceneNode (irr::scene::ISceneNode* parent,
 270                        irr::scene::ISceneManager* smgr,
 271                        irr::s32 id,
 272                        const irr::core::vector3df& position,
 273                        const irr::core::vector3df& rotation,
 274                        const irr::core::vector3df& scale,
 275                        SCM render,
 276                        SCM get_bounding_box,
 277                        SCM get_material_count,
 278                        SCM get_material)
 279         : irr::scene::ISceneNode (parent, smgr, id, position, rotation, scale)
 280       {
 281         scm_render = render;
 282         scm_get_bounding_box = get_bounding_box;
 283         scm_get_material_count = get_material_count;
 284         scm_get_material = get_material;
 285       }
 286
 287       virtual void OnRegisterSceneNode ()
 288       {
 289         if (IsVisible)
 290           {
 291             SceneManager->registerNodeForRendering (this);
 292           }
 293         ISceneNode::OnRegisterSceneNode ();
 294       }
 295
 296       virtual void render ()
 297       {
 298         scm_call_0 (scm_render);
 299       }
 300
 301       virtual const irr::core::aabbox3d<irr::f32>& getBoundingBox () const
 302       {
 303         SCM box = scm_call_0 (scm_get_bounding_box);
 304         return *(unwrap_box3d (box));
 305       }
 306
 307       virtual irr::u32 getMaterialCount () const
 308       {
 309         return scm_to_uint32 (scm_call_0 (scm_get_material_count));
 310       }
 311
 312       virtual irr::video::SMaterial& getMaterial (irr::u32 i)
 313       {
 314         SCM material = scm_call_1 (scm_get_material, scm_from_uint32 (i));
 315         return *(unwrap_material (material));
 316       }
 317     };
 318
 319     CustomSceneNode* node =
 320       new CustomSceneNode (unwrap_scene_node (parent),
 321                            scene_manager,
 322                            scm_to_int32 (id),
 323                            scm_to_vector3df (position),
 324                            scm_to_vector3df (rotation),
 325                            scm_to_vector3df (scale),
 326                            proc_render,
 327                            proc_get_bounding_box,
 328                            proc_get_material_count,
 329                            proc_get_material);
 330     return wrap_scene_node (node);
 331   }
 332
 333   SCM
 334   irr_scene_addOctreeSceneNode (SCM wrapped_scene_manager,
 335                                 SCM wrapped_mesh,
 336                                 SCM rest)
 337   {
 338     SCM parent = scm_from_bool (0);
 339     SCM id = scm_from_int32 (-1);
 340     SCM minimal_polys_per_node = scm_from_int32 (256);
 341     SCM also_add_if_mesh_pointer_zero = scm_from_bool (0);
 342
 343     scm_c_bind_keyword_arguments ("add-octree-scene-node!", rest, (scm_t_keyword_arguments_flags)0,
 344                                   scm_from_utf8_keyword ("parent"), &parent,
 345                                   scm_from_utf8_keyword ("id"), &id,
 346                                   scm_from_utf8_keyword ("minimal-polys-per-node"), &minimal_polys_per_node,
 347                                   scm_from_utf8_keyword ("also-add-if-mesh-pointer-zero"), &also_add_if_mesh_pointer_zero,
 348                                   SCM_UNDEFINED);
 349
 350     irr::scene::ISceneManager* smgr = unwrap_scene_manager (wrapped_scene_manager);
 351     irr::scene::IMeshSceneNode* node;
 352     if (animated_mesh_p (wrapped_mesh))
 353       {
 354         node = smgr->addOctreeSceneNode (unwrap_animated_mesh (wrapped_mesh),
 355                                          scm_is_false (parent) ? 0 : unwrap_scene_node (parent),
 356                                          scm_to_int32 (id),
 357                                          scm_to_int32 (minimal_polys_per_node),
 358                                          scm_to_bool (also_add_if_mesh_pointer_zero));
 359       }
 360     else
 361       {
 362         node = smgr->addOctreeSceneNode (unwrap_mesh (wrapped_mesh),
 363                                          scm_is_false (parent) ? 0 : unwrap_scene_node (parent),
 364                                          scm_to_int32 (id),
 365                                          scm_to_int32 (minimal_polys_per_node),
 366                                          scm_to_bool (also_add_if_mesh_pointer_zero));
 367       }
 368     return wrap_mesh_scene_node (node);
 369   }
 370
 371   SCM
 372   irr_scene_addSphereSceneNode (SCM wrapped_scene_manager,
 373                                 SCM rest)
 374   {
 375     SCM radius = scm_from_double (5.0);
 376     SCM poly_count = scm_from_int32 (16);
 377     SCM parent = scm_from_bool (0);
 378     SCM id = scm_from_int32 (-1);
 379     SCM position = scm_list_3 (scm_from_double (0),
 380                                scm_from_double (0),
 381                                scm_from_double (0));
 382     SCM rotation = scm_list_3 (scm_from_double (0),
 383                                scm_from_double (0),
 384                                scm_from_double (0));
 385     SCM scale = scm_list_3 (scm_from_double (1),
 386                             scm_from_double (1),
 387                             scm_from_double (1));
 388
 389     scm_c_bind_keyword_arguments ("add-sphere-scene-node!", rest, (scm_t_keyword_arguments_flags)0,
 390                                   scm_from_utf8_keyword ("radius"), &radius,
 391                                   scm_from_utf8_keyword ("poly-count"), &poly_count,
 392                                   scm_from_utf8_keyword ("parent"), &parent,
 393                                   scm_from_utf8_keyword ("id"), &id,
 394                                   scm_from_utf8_keyword ("position"), &position,
 395                                   scm_from_utf8_keyword ("rotation"), &rotation,
 396                                   scm_from_utf8_keyword ("scale"), &scale,
 397                                   SCM_UNDEFINED);
 398
 399     irr::scene::ISceneManager* smgr = unwrap_scene_manager (wrapped_scene_manager);
 400     irr::scene::IMeshSceneNode* node =
 401       smgr->addSphereSceneNode (scm_to_double (radius),
 402                                 scm_to_int32 (poly_count),
 403                                 scm_is_false (parent) ? 0 : unwrap_scene_node (parent),
 404                                 scm_to_int32 (id),
 405                                 scm_to_vector3df (position),
 406                                 scm_to_vector3df (rotation),
 407                                 scm_to_vector3df (scale));
 408     return wrap_mesh_scene_node (node);
 409   }
 410
 411   SCM
 412   irr_scene_createFlyCircleAnimator (SCM wrapped_scene_manager,
 413                                      SCM rest)
 414   {
 415     SCM center = scm_list_3 (scm_from_double (0),
 416                              scm_from_double (0),
 417                              scm_from_double (0));
 418     SCM radius = scm_from_double (100);
 419     SCM speed = scm_from_double (0.001);
 420     SCM direction = scm_list_3 (scm_from_double (0),
 421                                 scm_from_double (1),
 422                                 scm_from_double (0));
 423     SCM start_position = scm_from_double (0);
 424     SCM radius_ellipsoid = scm_from_double (0);
 425
 426     scm_c_bind_keyword_arguments ("create-fly-circle-animator", rest, (scm_t_keyword_arguments_flags)0,
 427                                   scm_from_utf8_keyword ("center"), &center,
 428                                   scm_from_utf8_keyword ("radius"), &radius,
 429                                   scm_from_utf8_keyword ("speed"), &speed,
 430                                   scm_from_utf8_keyword ("direction"), &direction,
 431                                   scm_from_utf8_keyword ("start-position"), &start_position,
 432                                   scm_from_utf8_keyword ("radius-ellipsoid"), &radius_ellipsoid,
 433                                   SCM_UNDEFINED);
 434
 435     irr::scene::ISceneManager* smgr = unwrap_scene_manager (wrapped_scene_manager);
 436     irr::scene::ISceneNodeAnimator* anim =
 437       smgr->createFlyCircleAnimator (scm_to_vector3df (center),
 438                                      scm_to_double (radius),
 439                                      scm_to_double (speed),
 440                                      scm_to_vector3df (direction),
 441                                      scm_to_double (start_position),
 442                                      scm_to_double (radius_ellipsoid));
 443     return wrap_scene_node_animator (anim);
 444   }
 445
 446   SCM
 447   irr_scene_createFlyStraightAnimator (SCM wrapped_scene_manager,
 448                                        SCM start_point,
 449                                        SCM end_point,
 450                                        SCM time_for_way,
 451                                        SCM rest)
 452   {
 453     SCM loop = scm_from_bool (0);
 454     SCM pingpong = scm_from_bool (0);
 455
 456     scm_c_bind_keyword_arguments ("create-fly-straight-animator", rest, (scm_t_keyword_arguments_flags)0,
 457                                   scm_from_utf8_keyword ("loop"), &loop,
 458                                   scm_from_utf8_keyword ("pingpong"), &pingpong,
 459                                   SCM_UNDEFINED);
 460
 461     irr::scene::ISceneManager* smgr = unwrap_scene_manager (wrapped_scene_manager);
 462     irr::scene::ISceneNodeAnimator* anim =
 463       smgr->createFlyStraightAnimator (scm_to_vector3df (start_point),
 464                                        scm_to_vector3df (end_point),
 465                                        scm_to_uint32 (time_for_way),
 466                                        scm_to_bool (loop),
 467                                        scm_to_bool (pingpong));
 468     return wrap_scene_node_animator (anim);
 469   }
 470
 471   SCM
 472   irr_scene_createRotationAnimator (SCM wrapped_scene_manager,
 473                                     SCM rotation_speed)
 474   {
 475     irr::scene::ISceneManager* smgr = unwrap_scene_manager (wrapped_scene_manager);
 476     irr::scene::ISceneNodeAnimator* anim =
 477       smgr->createRotationAnimator (scm_to_vector3df (rotation_speed));
 478     return wrap_scene_node_animator (anim);
 479   }
 480
 481   SCM
 482   irr_scene_getMesh (SCM wrapped_scene_manager,
 483                      SCM filename)
 484   {
 485     irr::scene::ISceneManager* smgr = unwrap_scene_manager (wrapped_scene_manager);
 486     irr::scene::IAnimatedMesh* mesh = smgr->getMesh(scm_to_utf8_stringn (filename, NULL));
 487     return wrap_animated_mesh (mesh);
 488   }
 489
 490   SCM
 491   irr_scene_getRootSceneNode (SCM wrapped_scene_manager)
 492   {
 493     irr::scene::ISceneManager* smgr = unwrap_scene_manager (wrapped_scene_manager);
 494     return wrap_scene_node (smgr->getRootSceneNode ());
 495   }
 496
 497   SCM
 498   irr_getSceneManager (SCM wrapped_obj)
 499   {
 500     irr::scene::ISceneManager* scene_manager;
 501     if (device_p (wrapped_obj))
 502       {
 503         scene_manager = unwrap_device (wrapped_obj)->getSceneManager ();
 504       }
 505     else
 506       {
 507         scm_error (scm_arg_type_key, NULL, "Cannot get scene manager from object: ~S",
 508                    scm_list_1 (wrapped_obj), scm_list_1 (wrapped_obj));
 509       }
 510     return wrap_scene_manager (scene_manager);
 511   }
 512
 513 }