src/wieldmesh.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2010-2014 celeron55, Perttu Ahola <celeron55@gmail.com>
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU Lesser General Public License as published by
   7 the Free Software Foundation; either version 2.1 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU Lesser General Public License for more details.
  14
  15 You should have received a copy of the GNU Lesser General Public License along
  16 with this program; if not, write to the Free Software Foundation, Inc.,
  17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 */
  19
  20 #include "settings.h"
  21 #include "wieldmesh.h"
  22 #include "inventory.h"
  23 #include "client.h"
  24 #include "itemdef.h"
  25 #include "nodedef.h"
  26 #include "mesh.h"
  27 #include "mapblock_mesh.h"
  28 #include "client/tile.h"
  29 #include "log.h"
  30 #include "util/numeric.h"
  31 #include <map>
  32 #include <IMeshManipulator.h>
  33
  34 #define WIELD_SCALE_FACTOR 30.0
  35 #define WIELD_SCALE_FACTOR_EXTRUDED 40.0
  36
  37 #define MIN_EXTRUSION_MESH_RESOLUTION 16
  38 #define MAX_EXTRUSION_MESH_RESOLUTION 512
  39
  40 static scene::IMesh *createExtrusionMesh(int resolution_x, int resolution_y)
  41 {
  42         const f32 r = 0.5;
  43
  44         scene::IMeshBuffer *buf = new scene::SMeshBuffer();
  45         video::SColor c(255,255,255,255);
  46         v3f scale(1.0, 1.0, 0.1);
  47
  48         // Front and back
  49         {
  50                 video::S3DVertex vertices[8] = {
  51                         // z-
  52                         video::S3DVertex(-r,+r,-r, 0,0,-1, c, 0,0),
  53                         video::S3DVertex(+r,+r,-r, 0,0,-1, c, 1,0),
  54                         video::S3DVertex(+r,-r,-r, 0,0,-1, c, 1,1),
  55                         video::S3DVertex(-r,-r,-r, 0,0,-1, c, 0,1),
  56                         // z+
  57                         video::S3DVertex(-r,+r,+r, 0,0,+1, c, 0,0),
  58                         video::S3DVertex(-r,-r,+r, 0,0,+1, c, 0,1),
  59                         video::S3DVertex(+r,-r,+r, 0,0,+1, c, 1,1),
  60                         video::S3DVertex(+r,+r,+r, 0,0,+1, c, 1,0),
  61                 };
  62                 u16 indices[12] = {0,1,2,2,3,0,4,5,6,6,7,4};
  63                 buf->append(vertices, 8, indices, 12);
  64         }
  65
  66         f32 pixelsize_x = 1 / (f32) resolution_x;
  67         f32 pixelsize_y = 1 / (f32) resolution_y;
  68
  69         for (int i = 0; i < resolution_x; ++i) {
  70                 f32 pixelpos_x = i * pixelsize_x - 0.5;
  71                 f32 x0 = pixelpos_x;
  72                 f32 x1 = pixelpos_x + pixelsize_x;
  73                 f32 tex0 = (i + 0.1) * pixelsize_x;
  74                 f32 tex1 = (i + 0.9) * pixelsize_x;
  75                 video::S3DVertex vertices[8] = {
  76                         // x-
  77                         video::S3DVertex(x0,-r,-r, -1,0,0, c, tex0,1),
  78                         video::S3DVertex(x0,-r,+r, -1,0,0, c, tex1,1),
  79                         video::S3DVertex(x0,+r,+r, -1,0,0, c, tex1,0),
  80                         video::S3DVertex(x0,+r,-r, -1,0,0, c, tex0,0),
  81                         // x+
  82                         video::S3DVertex(x1,-r,-r, +1,0,0, c, tex0,1),
  83                         video::S3DVertex(x1,+r,-r, +1,0,0, c, tex0,0),
  84                         video::S3DVertex(x1,+r,+r, +1,0,0, c, tex1,0),
  85                         video::S3DVertex(x1,-r,+r, +1,0,0, c, tex1,1),
  86                 };
  87                 u16 indices[12] = {0,1,2,2,3,0,4,5,6,6,7,4};
  88                 buf->append(vertices, 8, indices, 12);
  89         }
  90         for (int i = 0; i < resolution_y; ++i) {
  91                 f32 pixelpos_y = i * pixelsize_y - 0.5;
  92                 f32 y0 = -pixelpos_y - pixelsize_y;
  93                 f32 y1 = -pixelpos_y;
  94                 f32 tex0 = (i + 0.1) * pixelsize_y;
  95                 f32 tex1 = (i + 0.9) * pixelsize_y;
  96                 video::S3DVertex vertices[8] = {
  97                         // y-
  98                         video::S3DVertex(-r,y0,-r, 0,-1,0, c, 0,tex0),
  99                         video::S3DVertex(+r,y0,-r, 0,-1,0, c, 1,tex0),
 100                         video::S3DVertex(+r,y0,+r, 0,-1,0, c, 1,tex1),
 101                         video::S3DVertex(-r,y0,+r, 0,-1,0, c, 0,tex1),
 102                         // y+
 103                         video::S3DVertex(-r,y1,-r, 0,+1,0, c, 0,tex0),
 104                         video::S3DVertex(-r,y1,+r, 0,+1,0, c, 0,tex1),
 105                         video::S3DVertex(+r,y1,+r, 0,+1,0, c, 1,tex1),
 106                         video::S3DVertex(+r,y1,-r, 0,+1,0, c, 1,tex0),
 107                 };
 108                 u16 indices[12] = {0,1,2,2,3,0,4,5,6,6,7,4};
 109                 buf->append(vertices, 8, indices, 12);
 110         }
 111
 112         // Create mesh object
 113         scene::SMesh *mesh = new scene::SMesh();
 114         mesh->addMeshBuffer(buf);
 115         buf->drop();
 116         scaleMesh(mesh, scale);  // also recalculates bounding box
 117         return mesh;
 118 }
 119
 120 /*
 121         Caches extrusion meshes so that only one of them per resolution
 122         is needed. Also caches one cube (for convenience).
 123
 124         E.g. there is a single extrusion mesh that is used for all
 125         16x16 px images, another for all 256x256 px images, and so on.
 126
 127         WARNING: Not thread safe. This should not be a problem since
 128         rendering related classes (such as WieldMeshSceneNode) will be
 129         used from the rendering thread only.
 130 */
 131 class ExtrusionMeshCache: public IReferenceCounted
 132 {
 133 public:
 134         // Constructor
 135         ExtrusionMeshCache()
 136         {
 137                 for (int resolution = MIN_EXTRUSION_MESH_RESOLUTION;
 138                                 resolution <= MAX_EXTRUSION_MESH_RESOLUTION;
 139                                 resolution *= 2) {
 140                         m_extrusion_meshes[resolution] =
 141                                 createExtrusionMesh(resolution, resolution);
 142                 }
 143                 m_cube = createCubeMesh(v3f(1.0, 1.0, 1.0));
 144         }
 145         // Destructor
 146         virtual ~ExtrusionMeshCache()
 147         {
 148                 for (std::map<int, scene::IMesh*>::iterator
 149                                 it = m_extrusion_meshes.begin();
 150                                 it != m_extrusion_meshes.end(); ++it) {
 151                         it->second->drop();
 152                 }
 153                 m_cube->drop();
 154         }
 155         // Get closest extrusion mesh for given image dimensions
 156         // Caller must drop the returned pointer
 157         scene::IMesh* create(core::dimension2d<u32> dim)
 158         {
 159                 // handle non-power of two textures inefficiently without cache
 160                 if (!is_power_of_two(dim.Width) || !is_power_of_two(dim.Height)) {
 161                         return createExtrusionMesh(dim.Width, dim.Height);
 162                 }
 163
 164                 int maxdim = MYMAX(dim.Width, dim.Height);
 165
 166                 std::map<int, scene::IMesh*>::iterator
 167                         it = m_extrusion_meshes.lower_bound(maxdim);
 168
 169                 if (it == m_extrusion_meshes.end()) {
 170                         // no viable resolution found; use largest one
 171                         it = m_extrusion_meshes.find(MAX_EXTRUSION_MESH_RESOLUTION);
 172                         sanity_check(it != m_extrusion_meshes.end());
 173                 }
 174
 175                 scene::IMesh *mesh = it->second;
 176                 mesh->grab();
 177                 return mesh;
 178         }
 179         // Returns a 1x1x1 cube mesh with one meshbuffer (material) per face
 180         // Caller must drop the returned pointer
 181         scene::IMesh* createCube()
 182         {
 183                 m_cube->grab();
 184                 return m_cube;
 185         }
 186
 187 private:
 188         std::map<int, scene::IMesh*> m_extrusion_meshes;
 189         scene::IMesh *m_cube;
 190 };
 191
 192 ExtrusionMeshCache *g_extrusion_mesh_cache = NULL;
 193
 194
 195 WieldMeshSceneNode::WieldMeshSceneNode(scene::ISceneManager *mgr, s32 id, bool lighting):
 196         scene::ISceneNode(mgr->getRootSceneNode(), mgr, id),
 197         m_material_type(video::EMT_TRANSPARENT_ALPHA_CHANNEL_REF),
 198         m_lighting(lighting)
 199 {
 200         m_enable_shaders = g_settings->getBool("enable_shaders");
 201         m_anisotropic_filter = g_settings->getBool("anisotropic_filter");
 202         m_bilinear_filter = g_settings->getBool("bilinear_filter");
 203         m_trilinear_filter = g_settings->getBool("trilinear_filter");
 204
 205         // If this is the first wield mesh scene node, create a cache
 206         // for extrusion meshes (and a cube mesh), otherwise reuse it
 207         if (!g_extrusion_mesh_cache)
 208                 g_extrusion_mesh_cache = new ExtrusionMeshCache();
 209         else
 210                 g_extrusion_mesh_cache->grab();
 211
 212         // Disable bounding box culling for this scene node
 213         // since we won't calculate the bounding box.
 214         setAutomaticCulling(scene::EAC_OFF);
 215
 216         // Create the child scene node
 217         scene::IMesh *dummymesh = g_extrusion_mesh_cache->createCube();
 218         m_meshnode = SceneManager->addMeshSceneNode(dummymesh, this, -1);
 219         m_meshnode->setReadOnlyMaterials(false);
 220         m_meshnode->setVisible(false);
 221         dummymesh->drop(); // m_meshnode grabbed it
 222 }
 223
 224 WieldMeshSceneNode::~WieldMeshSceneNode()
 225 {
 226         sanity_check(g_extrusion_mesh_cache);
 227         if (g_extrusion_mesh_cache->drop())
 228                 g_extrusion_mesh_cache = nullptr;
 229 }
 230
 231 void WieldMeshSceneNode::setCube(const ContentFeatures &f,
 232                         v3f wield_scale)
 233 {
 234         scene::IMesh *cubemesh = g_extrusion_mesh_cache->createCube();
 235         scene::SMesh *copy = cloneMesh(cubemesh);
 236         cubemesh->drop();
 237         postProcessNodeMesh(copy, f, false, true, &m_material_type, &m_colors);
 238         changeToMesh(copy);
 239         copy->drop();
 240         m_meshnode->setScale(wield_scale * WIELD_SCALE_FACTOR);
 241 }
 242
 243 void WieldMeshSceneNode::setExtruded(const std::string &imagename,
 244                 v3f wield_scale, ITextureSource *tsrc, u8 num_frames)
 245 {
 246         video::ITexture *texture = tsrc->getTexture(imagename);
 247         if (!texture) {
 248                 changeToMesh(nullptr);
 249                 return;
 250         }
 251
 252         core::dimension2d<u32> dim = texture->getSize();
 253         // Detect animation texture and pull off top frame instead of using entire thing
 254         if (num_frames > 1) {
 255                 u32 frame_height = dim.Height / num_frames;
 256                 dim = core::dimension2d<u32>(dim.Width, frame_height);
 257         }
 258         scene::IMesh *mesh = g_extrusion_mesh_cache->create(dim);
 259         scene::SMesh *copy = cloneMesh(mesh);
 260         mesh->drop();
 261         changeToMesh(copy);
 262         copy->drop();
 263
 264         m_meshnode->setScale(wield_scale * WIELD_SCALE_FACTOR_EXTRUDED);
 265
 266         // Customize material
 267         video::SMaterial &material = m_meshnode->getMaterial(0);
 268         material.setTexture(0, tsrc->getTextureForMesh(imagename));
 269         material.TextureLayer[0].TextureWrapU = video::ETC_CLAMP_TO_EDGE;
 270         material.TextureLayer[0].TextureWrapV = video::ETC_CLAMP_TO_EDGE;
 271         material.MaterialType = m_material_type;
 272         material.setFlag(video::EMF_BACK_FACE_CULLING, true);
 273         // Enable bi/trilinear filtering only for high resolution textures
 274         if (dim.Width > 32) {
 275                 material.setFlag(video::EMF_BILINEAR_FILTER, m_bilinear_filter);
 276                 material.setFlag(video::EMF_TRILINEAR_FILTER, m_trilinear_filter);
 277         } else {
 278                 material.setFlag(video::EMF_BILINEAR_FILTER, false);
 279                 material.setFlag(video::EMF_TRILINEAR_FILTER, false);
 280         }
 281         material.setFlag(video::EMF_ANISOTROPIC_FILTER, m_anisotropic_filter);
 282         // mipmaps cause "thin black line" artifacts
 283 #if (IRRLICHT_VERSION_MAJOR >= 1 && IRRLICHT_VERSION_MINOR >= 8) || IRRLICHT_VERSION_MAJOR >= 2
 284         material.setFlag(video::EMF_USE_MIP_MAPS, false);
 285 #endif
 286         if (m_enable_shaders) {
 287                 material.setTexture(2, tsrc->getShaderFlagsTexture(false));
 288         }
 289 }
 290
 291 void WieldMeshSceneNode::setItem(const ItemStack &item, Client *client)
 292 {
 293         ITextureSource *tsrc = client->getTextureSource();
 294         IItemDefManager *idef = client->getItemDefManager();
 295         IShaderSource *shdrsrc = client->getShaderSource();
 296         INodeDefManager *ndef = client->getNodeDefManager();
 297         const ItemDefinition &def = item.getDefinition(idef);
 298         const ContentFeatures &f = ndef->get(def.name);
 299         content_t id = ndef->getId(def.name);
 300
 301         if (m_enable_shaders) {
 302                 u32 shader_id = shdrsrc->getShader("wielded_shader", TILE_MATERIAL_BASIC, NDT_NORMAL);
 303                 m_material_type = shdrsrc->getShaderInfo(shader_id).material;
 304         }
 305
 306         // Color-related
 307         m_colors.clear();
 308         m_base_color = idef->getItemstackColor(item, client);
 309
 310         // If wield_image is defined, it overrides everything else
 311         if (def.wield_image != "") {
 312                 setExtruded(def.wield_image, def.wield_scale, tsrc, 1);
 313                 m_colors.push_back(ItemPartColor());
 314                 return;
 315         }
 316         // Handle nodes
 317         // See also CItemDefManager::createClientCached()
 318         else if (def.type == ITEM_NODE) {
 319                 if (f.mesh_ptr[0]) {
 320                         // e.g. mesh nodes and nodeboxes
 321                         scene::SMesh *mesh = cloneMesh(f.mesh_ptr[0]);
 322                         postProcessNodeMesh(mesh, f, m_enable_shaders, true,
 323                                 &m_material_type, &m_colors);
 324                         changeToMesh(mesh);
 325                         mesh->drop();
 326                         // mesh is pre-scaled by BS * f->visual_scale
 327                         m_meshnode->setScale(
 328                                         def.wield_scale * WIELD_SCALE_FACTOR
 329                                         / (BS * f.visual_scale));
 330                 } else if (f.drawtype == NDT_AIRLIKE) {
 331                         changeToMesh(nullptr);
 332                 } else if (f.drawtype == NDT_PLANTLIKE) {
 333                         setExtruded(tsrc->getTextureName(f.tiles[0].layers[0].texture_id),
 334                                 def.wield_scale, tsrc,
 335                                 f.tiles[0].layers[0].animation_frame_count);
 336                 } else if (f.drawtype == NDT_NORMAL || f.drawtype == NDT_ALLFACES) {
 337                         setCube(f, def.wield_scale);
 338                 } else {
 339                         MeshMakeData mesh_make_data(client, false);
 340                         MapNode mesh_make_node(id, 255, 0);
 341                         mesh_make_data.fillSingleNode(&mesh_make_node);
 342                         MapBlockMesh mapblock_mesh(&mesh_make_data, v3s16(0, 0, 0));
 343                         scene::SMesh *mesh = cloneMesh(mapblock_mesh.getMesh());
 344                         translateMesh(mesh, v3f(-BS, -BS, -BS));
 345                         postProcessNodeMesh(mesh, f, m_enable_shaders, true,
 346                                 &m_material_type, &m_colors);
 347                         changeToMesh(mesh);
 348                         mesh->drop();
 349                         m_meshnode->setScale(
 350                                         def.wield_scale * WIELD_SCALE_FACTOR
 351                                         / (BS * f.visual_scale));
 352                 }
 353                 u32 material_count = m_meshnode->getMaterialCount();
 354                 for (u32 i = 0; i < material_count; ++i) {
 355                         video::SMaterial &material = m_meshnode->getMaterial(i);
 356                         material.setFlag(video::EMF_BACK_FACE_CULLING, true);
 357                         material.setFlag(video::EMF_BILINEAR_FILTER, m_bilinear_filter);
 358                         material.setFlag(video::EMF_TRILINEAR_FILTER, m_trilinear_filter);
 359                 }
 360                 return;
 361         }
 362         else if (def.inventory_image != "") {
 363                 setExtruded(def.inventory_image, def.wield_scale, tsrc, 1);
 364                 m_colors.push_back(ItemPartColor());
 365                 return;
 366         }
 367
 368         // no wield mesh found
 369         changeToMesh(nullptr);
 370 }
 371
 372 void WieldMeshSceneNode::setColor(video::SColor c)
 373 {
 374         assert(!m_lighting);
 375         scene::IMesh *mesh = m_meshnode->getMesh();
 376         if (!mesh)
 377                 return;
 378
 379         u8 red = c.getRed();
 380         u8 green = c.getGreen();
 381         u8 blue = c.getBlue();
 382         u32 mc = mesh->getMeshBufferCount();
 383         for (u32 j = 0; j < mc; j++) {
 384                 video::SColor bc(m_base_color);
 385                 if ((m_colors.size() > j) && (m_colors[j].override_base))
 386                         bc = m_colors[j].color;
 387                 video::SColor buffercolor(255,
 388                         bc.getRed() * red / 255,
 389                         bc.getGreen() * green / 255,
 390                         bc.getBlue() * blue / 255);
 391                 scene::IMeshBuffer *buf = mesh->getMeshBuffer(j);
 392                 colorizeMeshBuffer(buf, &buffercolor);
 393         }
 394 }
 395
 396 void WieldMeshSceneNode::render()
 397 {
 398         // note: if this method is changed to actually do something,
 399         // you probably should implement OnRegisterSceneNode as well
 400 }
 401
 402 void WieldMeshSceneNode::changeToMesh(scene::IMesh *mesh)
 403 {
 404         if (!mesh) {
 405                 scene::IMesh *dummymesh = g_extrusion_mesh_cache->createCube();
 406                 m_meshnode->setVisible(false);
 407                 m_meshnode->setMesh(dummymesh);
 408                 dummymesh->drop();  // m_meshnode grabbed it
 409         } else {
 410                 m_meshnode->setMesh(mesh);
 411         }
 412
 413         m_meshnode->setMaterialFlag(video::EMF_LIGHTING, m_lighting);
 414         // need to normalize normals when lighting is enabled (because of setScale())
 415         m_meshnode->setMaterialFlag(video::EMF_NORMALIZE_NORMALS, m_lighting);
 416         m_meshnode->setVisible(true);
 417 }
 418
 419 void getItemMesh(Client *client, const ItemStack &item, ItemMesh *result)
 420 {
 421         ITextureSource *tsrc = client->getTextureSource();
 422         IItemDefManager *idef = client->getItemDefManager();
 423         INodeDefManager *ndef = client->getNodeDefManager();
 424         const ItemDefinition &def = item.getDefinition(idef);
 425         const ContentFeatures &f = ndef->get(def.name);
 426         content_t id = ndef->getId(def.name);
 427
 428         if (!g_extrusion_mesh_cache) {
 429                 g_extrusion_mesh_cache = new ExtrusionMeshCache();
 430         } else {
 431                 g_extrusion_mesh_cache->grab();
 432         }
 433
 434         scene::SMesh *mesh = nullptr;
 435
 436         // Shading is on by default
 437         result->needs_shading = true;
 438
 439         // If inventory_image is defined, it overrides everything else
 440         if (def.inventory_image != "") {
 441                 mesh = getExtrudedMesh(tsrc, def.inventory_image);
 442                 result->buffer_colors.push_back(ItemPartColor());
 443                 // Items with inventory images do not need shading
 444                 result->needs_shading = false;
 445         } else if (def.type == ITEM_NODE) {
 446                 if (f.mesh_ptr[0]) {
 447                         mesh = cloneMesh(f.mesh_ptr[0]);
 448                         scaleMesh(mesh, v3f(0.12, 0.12, 0.12));
 449                 } else if (f.drawtype == NDT_PLANTLIKE) {
 450                         mesh = getExtrudedMesh(tsrc,
 451                                 tsrc->getTextureName(f.tiles[0].layers[0].texture_id));
 452                 } else if (f.drawtype == NDT_NORMAL || f.drawtype == NDT_ALLFACES
 453                         || f.drawtype == NDT_LIQUID || f.drawtype == NDT_FLOWINGLIQUID) {
 454                         scene::IMesh *cube = g_extrusion_mesh_cache->createCube();
 455                         mesh = cloneMesh(cube);
 456                         cube->drop();
 457                         scaleMesh(mesh, v3f(1.2, 1.2, 1.2));
 458                 } else {
 459                         MeshMakeData mesh_make_data(client, false);
 460                         MapNode mesh_make_node(id, 255, 0);
 461                         mesh_make_data.fillSingleNode(&mesh_make_node);
 462                         MapBlockMesh mapblock_mesh(&mesh_make_data, v3s16(0, 0, 0));
 463                         mesh = cloneMesh(mapblock_mesh.getMesh());
 464                         translateMesh(mesh, v3f(-BS, -BS, -BS));
 465                         scaleMesh(mesh, v3f(0.12, 0.12, 0.12));
 466
 467                         u32 mc = mesh->getMeshBufferCount();
 468                         for (u32 i = 0; i < mc; ++i) {
 469                                 video::SMaterial &material1 =
 470                                         mesh->getMeshBuffer(i)->getMaterial();
 471                                 video::SMaterial &material2 =
 472                                         mapblock_mesh.getMesh()->getMeshBuffer(i)->getMaterial();
 473                                 material1.setTexture(0, material2.getTexture(0));
 474                                 material1.setTexture(1, material2.getTexture(1));
 475                                 material1.setTexture(2, material2.getTexture(2));
 476                                 material1.setTexture(3, material2.getTexture(3));
 477                                 material1.MaterialType = material2.MaterialType;
 478                         }
 479                 }
 480
 481                 u32 mc = mesh->getMeshBufferCount();
 482                 for (u32 i = 0; i < mc; ++i) {
 483                         scene::IMeshBuffer *buf = mesh->getMeshBuffer(i);
 484                         video::SMaterial &material = buf->getMaterial();
 485                         material.MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL;
 486                         material.setFlag(video::EMF_BILINEAR_FILTER, false);
 487                         material.setFlag(video::EMF_TRILINEAR_FILTER, false);
 488                         material.setFlag(video::EMF_BACK_FACE_CULLING, true);
 489                         material.setFlag(video::EMF_LIGHTING, false);
 490                 }
 491
 492                 rotateMeshXZby(mesh, -45);
 493                 rotateMeshYZby(mesh, -30);
 494
 495                 postProcessNodeMesh(mesh, f, false, false, nullptr, &result->buffer_colors);
 496         }
 497         result->mesh = mesh;
 498 }
 499
 500
 501
 502 scene::SMesh *getExtrudedMesh(ITextureSource *tsrc, const std::string &imagename)
 503 {
 504         video::ITexture *texture = tsrc->getTextureForMesh(imagename);
 505         if (!texture) {
 506                 return nullptr;
 507         }
 508
 509         core::dimension2d<u32> dim = texture->getSize();
 510         scene::IMesh *original = g_extrusion_mesh_cache->create(dim);
 511         scene::SMesh *mesh = cloneMesh(original);
 512         original->drop();
 513
 514         // Customize material
 515         video::SMaterial &material = mesh->getMeshBuffer(0)->getMaterial();
 516         material.setTexture(0, tsrc->getTexture(imagename));
 517         material.TextureLayer[0].TextureWrapU = video::ETC_CLAMP_TO_EDGE;
 518         material.TextureLayer[0].TextureWrapV = video::ETC_CLAMP_TO_EDGE;
 519         material.setFlag(video::EMF_BILINEAR_FILTER, false);
 520         material.setFlag(video::EMF_TRILINEAR_FILTER, false);
 521         material.setFlag(video::EMF_BACK_FACE_CULLING, true);
 522         material.setFlag(video::EMF_LIGHTING, false);
 523         material.MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL;
 524         scaleMesh(mesh, v3f(2.0, 2.0, 2.0));
 525
 526         return mesh;
 527 }
 528
 529 void postProcessNodeMesh(scene::SMesh *mesh, const ContentFeatures &f,
 530         bool use_shaders, bool set_material, video::E_MATERIAL_TYPE *mattype,
 531         std::vector<ItemPartColor> *colors)
 532 {
 533         u32 mc = mesh->getMeshBufferCount();
 534         // Allocate colors for existing buffers
 535         colors->clear();
 536         for (u32 i = 0; i < mc; ++i)
 537                 colors->push_back(ItemPartColor());
 538
 539         for (u32 i = 0; i < mc; ++i) {
 540                 const TileSpec *tile = &(f.tiles[i]);
 541                 scene::IMeshBuffer *buf = mesh->getMeshBuffer(i);
 542                 for (int layernum = 0; layernum < MAX_TILE_LAYERS; layernum++) {
 543                         const TileLayer *layer = &tile->layers[layernum];
 544                         if (layer->texture_id == 0)
 545                                 continue;
 546                         if (layernum != 0) {
 547                                 scene::IMeshBuffer *copy = cloneMeshBuffer(buf);
 548                                 copy->getMaterial() = buf->getMaterial();
 549                                 mesh->addMeshBuffer(copy);
 550                                 copy->drop();
 551                                 buf = copy;
 552                                 colors->push_back(
 553                                         ItemPartColor(layer->has_color, layer->color));
 554                         } else {
 555                                 (*colors)[i] = ItemPartColor(layer->has_color, layer->color);
 556                         }
 557                         video::SMaterial &material = buf->getMaterial();
 558                         if (set_material)
 559                                 layer->applyMaterialOptions(material);
 560                         if (mattype) {
 561                                 material.MaterialType = *mattype;
 562                         }
 563                         if (layer->animation_frame_count > 1) {
 564                                 FrameSpec animation_frame = layer->frames[0];
 565                                 material.setTexture(0, animation_frame.texture);
 566                         } else {
 567                                 material.setTexture(0, layer->texture);
 568                         }
 569                         if (use_shaders) {
 570                                 if (layer->normal_texture) {
 571                                         if (layer->animation_frame_count > 1) {
 572                                                 FrameSpec animation_frame = layer->frames[0];
 573                                                 material.setTexture(1, animation_frame.normal_texture);
 574                                         } else
 575                                                 material.setTexture(1, layer->normal_texture);
 576                                 }
 577                                 material.setTexture(2, layer->flags_texture);
 578                         }
 579                 }
 580         }
 581 }