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 "wieldmesh.h"
  21 #include "settings.h"
  22 #include "shader.h"
  23 #include "inventory.h"
  24 #include "client.h"
  25 #include "itemdef.h"
  26 #include "nodedef.h"
  27 #include "mesh.h"
  28 #include "content_mapblock.h"
  29 #include "mapblock_mesh.h"
  30 #include "client/tile.h"
  31 #include "log.h"
  32 #include "util/numeric.h"
  33 #include <map>
  34 #include <IMeshManipulator.h>
  35
  36 #define WIELD_SCALE_FACTOR 30.0
  37 #define WIELD_SCALE_FACTOR_EXTRUDED 40.0
  38
  39 #define MIN_EXTRUSION_MESH_RESOLUTION 16
  40 #define MAX_EXTRUSION_MESH_RESOLUTION 512
  41
  42 static scene::IMesh *createExtrusionMesh(int resolution_x, int resolution_y)
  43 {
  44         const f32 r = 0.5;
  45
  46         scene::IMeshBuffer *buf = new scene::SMeshBuffer();
  47         video::SColor c(255,255,255,255);
  48         v3f scale(1.0, 1.0, 0.1);
  49
  50         // Front and back
  51         {
  52                 video::S3DVertex vertices[8] = {
  53                         // z-
  54                         video::S3DVertex(-r,+r,-r, 0,0,-1, c, 0,0),
  55                         video::S3DVertex(+r,+r,-r, 0,0,-1, c, 1,0),
  56                         video::S3DVertex(+r,-r,-r, 0,0,-1, c, 1,1),
  57                         video::S3DVertex(-r,-r,-r, 0,0,-1, c, 0,1),
  58                         // z+
  59                         video::S3DVertex(-r,+r,+r, 0,0,+1, c, 0,0),
  60                         video::S3DVertex(-r,-r,+r, 0,0,+1, c, 0,1),
  61                         video::S3DVertex(+r,-r,+r, 0,0,+1, c, 1,1),
  62                         video::S3DVertex(+r,+r,+r, 0,0,+1, c, 1,0),
  63                 };
  64                 u16 indices[12] = {0,1,2,2,3,0,4,5,6,6,7,4};
  65                 buf->append(vertices, 8, indices, 12);
  66         }
  67
  68         f32 pixelsize_x = 1 / (f32) resolution_x;
  69         f32 pixelsize_y = 1 / (f32) resolution_y;
  70
  71         for (int i = 0; i < resolution_x; ++i) {
  72                 f32 pixelpos_x = i * pixelsize_x - 0.5;
  73                 f32 x0 = pixelpos_x;
  74                 f32 x1 = pixelpos_x + pixelsize_x;
  75                 f32 tex0 = (i + 0.1) * pixelsize_x;
  76                 f32 tex1 = (i + 0.9) * pixelsize_x;
  77                 video::S3DVertex vertices[8] = {
  78                         // x-
  79                         video::S3DVertex(x0,-r,-r, -1,0,0, c, tex0,1),
  80                         video::S3DVertex(x0,-r,+r, -1,0,0, c, tex1,1),
  81                         video::S3DVertex(x0,+r,+r, -1,0,0, c, tex1,0),
  82                         video::S3DVertex(x0,+r,-r, -1,0,0, c, tex0,0),
  83                         // x+
  84                         video::S3DVertex(x1,-r,-r, +1,0,0, c, tex0,1),
  85                         video::S3DVertex(x1,+r,-r, +1,0,0, c, tex0,0),
  86                         video::S3DVertex(x1,+r,+r, +1,0,0, c, tex1,0),
  87                         video::S3DVertex(x1,-r,+r, +1,0,0, c, tex1,1),
  88                 };
  89                 u16 indices[12] = {0,1,2,2,3,0,4,5,6,6,7,4};
  90                 buf->append(vertices, 8, indices, 12);
  91         }
  92         for (int i = 0; i < resolution_y; ++i) {
  93                 f32 pixelpos_y = i * pixelsize_y - 0.5;
  94                 f32 y0 = -pixelpos_y - pixelsize_y;
  95                 f32 y1 = -pixelpos_y;
  96                 f32 tex0 = (i + 0.1) * pixelsize_y;
  97                 f32 tex1 = (i + 0.9) * pixelsize_y;
  98                 video::S3DVertex vertices[8] = {
  99                         // y-
 100                         video::S3DVertex(-r,y0,-r, 0,-1,0, c, 0,tex0),
 101                         video::S3DVertex(+r,y0,-r, 0,-1,0, c, 1,tex0),
 102                         video::S3DVertex(+r,y0,+r, 0,-1,0, c, 1,tex1),
 103                         video::S3DVertex(-r,y0,+r, 0,-1,0, c, 0,tex1),
 104                         // y+
 105                         video::S3DVertex(-r,y1,-r, 0,+1,0, c, 0,tex0),
 106                         video::S3DVertex(-r,y1,+r, 0,+1,0, c, 0,tex1),
 107                         video::S3DVertex(+r,y1,+r, 0,+1,0, c, 1,tex1),
 108                         video::S3DVertex(+r,y1,-r, 0,+1,0, c, 1,tex0),
 109                 };
 110                 u16 indices[12] = {0,1,2,2,3,0,4,5,6,6,7,4};
 111                 buf->append(vertices, 8, indices, 12);
 112         }
 113
 114         // Create mesh object
 115         scene::SMesh *mesh = new scene::SMesh();
 116         mesh->addMeshBuffer(buf);
 117         buf->drop();
 118         scaleMesh(mesh, scale);  // also recalculates bounding box
 119         return mesh;
 120 }
 121
 122 /*
 123         Caches extrusion meshes so that only one of them per resolution
 124         is needed. Also caches one cube (for convenience).
 125
 126         E.g. there is a single extrusion mesh that is used for all
 127         16x16 px images, another for all 256x256 px images, and so on.
 128
 129         WARNING: Not thread safe. This should not be a problem since
 130         rendering related classes (such as WieldMeshSceneNode) will be
 131         used from the rendering thread only.
 132 */
 133 class ExtrusionMeshCache: public IReferenceCounted
 134 {
 135 public:
 136         // Constructor
 137         ExtrusionMeshCache()
 138         {
 139                 for (int resolution = MIN_EXTRUSION_MESH_RESOLUTION;
 140                                 resolution <= MAX_EXTRUSION_MESH_RESOLUTION;
 141                                 resolution *= 2) {
 142                         m_extrusion_meshes[resolution] =
 143                                 createExtrusionMesh(resolution, resolution);
 144                 }
 145                 m_cube = createCubeMesh(v3f(1.0, 1.0, 1.0));
 146         }
 147         // Destructor
 148         virtual ~ExtrusionMeshCache()
 149         {
 150                 for (auto &extrusion_meshe : m_extrusion_meshes) {
 151                         extrusion_meshe.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, true);
 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         const std::string &overlay_name, v3f wield_scale, ITextureSource *tsrc,
 245         u8 num_frames)
 246 {
 247         video::ITexture *texture = tsrc->getTexture(imagename);
 248         if (!texture) {
 249                 changeToMesh(nullptr);
 250                 return;
 251         }
 252         video::ITexture *overlay_texture =
 253                 overlay_name.empty() ? NULL : tsrc->getTexture(overlay_name);
 254
 255         core::dimension2d<u32> dim = texture->getSize();
 256         // Detect animation texture and pull off top frame instead of using entire thing
 257         if (num_frames > 1) {
 258                 u32 frame_height = dim.Height / num_frames;
 259                 dim = core::dimension2d<u32>(dim.Width, frame_height);
 260         }
 261         scene::IMesh *original = g_extrusion_mesh_cache->create(dim);
 262         scene::SMesh *mesh = cloneMesh(original);
 263         original->drop();
 264         //set texture
 265         mesh->getMeshBuffer(0)->getMaterial().setTexture(0,
 266                 tsrc->getTexture(imagename));
 267         if (overlay_texture) {
 268                 scene::IMeshBuffer *copy = cloneMeshBuffer(mesh->getMeshBuffer(0));
 269                 copy->getMaterial().setTexture(0, overlay_texture);
 270                 mesh->addMeshBuffer(copy);
 271                 copy->drop();
 272         }
 273         changeToMesh(mesh);
 274         mesh->drop();
 275
 276         m_meshnode->setScale(wield_scale * WIELD_SCALE_FACTOR_EXTRUDED);
 277
 278         // Customize materials
 279         for (u32 layer = 0; layer < m_meshnode->getMaterialCount(); layer++) {
 280                 video::SMaterial &material = m_meshnode->getMaterial(layer);
 281                 material.TextureLayer[0].TextureWrapU = video::ETC_CLAMP_TO_EDGE;
 282                 material.TextureLayer[0].TextureWrapV = video::ETC_CLAMP_TO_EDGE;
 283                 material.MaterialType = m_material_type;
 284                 material.setFlag(video::EMF_BACK_FACE_CULLING, true);
 285                 // Enable bi/trilinear filtering only for high resolution textures
 286                 if (dim.Width > 32) {
 287                         material.setFlag(video::EMF_BILINEAR_FILTER, m_bilinear_filter);
 288                         material.setFlag(video::EMF_TRILINEAR_FILTER, m_trilinear_filter);
 289                 } else {
 290                         material.setFlag(video::EMF_BILINEAR_FILTER, false);
 291                         material.setFlag(video::EMF_TRILINEAR_FILTER, false);
 292                 }
 293                 material.setFlag(video::EMF_ANISOTROPIC_FILTER, m_anisotropic_filter);
 294                 // mipmaps cause "thin black line" artifacts
 295 #if (IRRLICHT_VERSION_MAJOR >= 1 && IRRLICHT_VERSION_MINOR >= 8) || IRRLICHT_VERSION_MAJOR >= 2
 296                 material.setFlag(video::EMF_USE_MIP_MAPS, false);
 297 #endif
 298                 if (m_enable_shaders) {
 299                         material.setTexture(2, tsrc->getShaderFlagsTexture(false));
 300                 }
 301         }
 302 }
 303
 304 scene::SMesh *createSpecialNodeMesh(Client *client, content_t id, std::vector<ItemPartColor> *colors)
 305 {
 306         MeshMakeData mesh_make_data(client, false, false);
 307         MeshCollector collector(false);
 308         mesh_make_data.setSmoothLighting(false);
 309         MapblockMeshGenerator gen(&mesh_make_data, &collector);
 310         gen.renderSingle(id);
 311         colors->clear();
 312         scene::SMesh *mesh = new scene::SMesh();
 313         for (auto &prebuffers : collector.prebuffers)
 314                 for (PreMeshBuffer &p : prebuffers) {
 315                         if (p.layer.material_flags & MATERIAL_FLAG_ANIMATION) {
 316                                 const FrameSpec &frame = (*p.layer.frames)[0];
 317                                 p.layer.texture = frame.texture;
 318                                 p.layer.normal_texture = frame.normal_texture;
 319                         }
 320                         for (video::S3DVertex &v : p.vertices)
 321                                 v.Color.setAlpha(255);
 322                         scene::SMeshBuffer *buf = new scene::SMeshBuffer();
 323                         // always set all textures
 324                         // with no shaders only texture 0 is ever actually used
 325                         buf->Material.setTexture(0, p.layer.texture);
 326                         buf->Material.setTexture(1, p.layer.normal_texture);
 327                         buf->Material.setTexture(2, p.layer.flags_texture);
 328                         p.layer.applyMaterialOptions(buf->Material);
 329                         mesh->addMeshBuffer(buf);
 330                         buf->append(&p.vertices[0], p.vertices.size(),
 331                                         &p.indices[0], p.indices.size());
 332                         buf->drop();
 333                         colors->push_back(
 334                                 ItemPartColor(p.layer.has_color, p.layer.color));
 335                 }
 336         return mesh;
 337 }
 338
 339 void WieldMeshSceneNode::setItem(const ItemStack &item, Client *client)
 340 {
 341         ITextureSource *tsrc = client->getTextureSource();
 342         IItemDefManager *idef = client->getItemDefManager();
 343         IShaderSource *shdrsrc = client->getShaderSource();
 344         INodeDefManager *ndef = client->getNodeDefManager();
 345         const ItemDefinition &def = item.getDefinition(idef);
 346         const ContentFeatures &f = ndef->get(def.name);
 347         content_t id = ndef->getId(def.name);
 348
 349         scene::SMesh *mesh = nullptr;
 350
 351         if (m_enable_shaders) {
 352                 u32 shader_id = shdrsrc->getShader("wielded_shader", TILE_MATERIAL_BASIC, NDT_NORMAL);
 353                 m_material_type = shdrsrc->getShaderInfo(shader_id).material;
 354         }
 355
 356         // Color-related
 357         m_colors.clear();
 358         m_base_color = idef->getItemstackColor(item, client);
 359
 360         // If wield_image is defined, it overrides everything else
 361         if (!def.wield_image.empty()) {
 362                 setExtruded(def.wield_image, def.wield_overlay, def.wield_scale, tsrc,
 363                         1);
 364                 m_colors.emplace_back();
 365                 // overlay is white, if present
 366                 m_colors.emplace_back(true, video::SColor(0xFFFFFFFF));
 367                 return;
 368         }
 369
 370         // Handle nodes
 371         // See also CItemDefManager::createClientCached()
 372         if (def.type == ITEM_NODE) {
 373                 if (f.mesh_ptr[0]) {
 374                         // e.g. mesh nodes and nodeboxes
 375                         mesh = cloneMesh(f.mesh_ptr[0]);
 376                         postProcessNodeMesh(mesh, f, m_enable_shaders, true,
 377                                 &m_material_type, &m_colors);
 378                         changeToMesh(mesh);
 379                         mesh->drop();
 380                         // mesh is pre-scaled by BS * f->visual_scale
 381                         m_meshnode->setScale(
 382                                         def.wield_scale * WIELD_SCALE_FACTOR
 383                                         / (BS * f.visual_scale));
 384                 } else {
 385                         switch (f.drawtype) {
 386                                 case NDT_AIRLIKE: {
 387                                         changeToMesh(nullptr);
 388                                         break;
 389                                 }
 390                                 case NDT_PLANTLIKE: {
 391                                         setExtruded(tsrc->getTextureName(f.tiles[0].layers[0].texture_id),
 392                                                 tsrc->getTextureName(f.tiles[0].layers[1].texture_id),
 393                                                 def.wield_scale, tsrc,
 394                                                 f.tiles[0].layers[0].animation_frame_count);
 395                                         // Add color
 396                                         const TileLayer &l0 = f.tiles[0].layers[0];
 397                                         m_colors.emplace_back(l0.has_color, l0.color);
 398                                         const TileLayer &l1 = f.tiles[0].layers[1];
 399                                         m_colors.emplace_back(l1.has_color, l1.color);
 400                                         break;
 401                                 }
 402                                 case NDT_PLANTLIKE_ROOTED: {
 403                                         setExtruded(tsrc->getTextureName(f.special_tiles[0].layers[0].texture_id),
 404                                                 "", def.wield_scale, tsrc,
 405                                                 f.special_tiles[0].layers[0].animation_frame_count);
 406                                         // Add color
 407                                         const TileLayer &l0 = f.special_tiles[0].layers[0];
 408                                         m_colors.emplace_back(l0.has_color, l0.color);
 409                                         break;
 410                                 }
 411                                 case NDT_NORMAL:
 412                                 case NDT_ALLFACES:
 413                                 case NDT_LIQUID:
 414                                 case NDT_FLOWINGLIQUID: {
 415                                         setCube(f, def.wield_scale);
 416                                         break;
 417                                 }
 418                                 default: {
 419                                         mesh = createSpecialNodeMesh(client, id, &m_colors);
 420                                         changeToMesh(mesh);
 421                                         mesh->drop();
 422                                         m_meshnode->setScale(
 423                                                         def.wield_scale * WIELD_SCALE_FACTOR
 424                                                         / (BS * f.visual_scale));
 425                                 }
 426                         }
 427                 }
 428                 u32 material_count = m_meshnode->getMaterialCount();
 429                 for (u32 i = 0; i < material_count; ++i) {
 430                         video::SMaterial &material = m_meshnode->getMaterial(i);
 431                         material.MaterialType = m_material_type;
 432                         material.setFlag(video::EMF_BACK_FACE_CULLING, true);
 433                         material.setFlag(video::EMF_BILINEAR_FILTER, m_bilinear_filter);
 434                         material.setFlag(video::EMF_TRILINEAR_FILTER, m_trilinear_filter);
 435                 }
 436                 return;
 437         }
 438         else if (!def.inventory_image.empty()) {
 439                 setExtruded(def.inventory_image, def.inventory_overlay, def.wield_scale,
 440                         tsrc, 1);
 441                 m_colors.emplace_back();
 442                 // overlay is white, if present
 443                 m_colors.emplace_back(true, video::SColor(0xFFFFFFFF));
 444                 return;
 445         }
 446
 447         // no wield mesh found
 448         changeToMesh(nullptr);
 449 }
 450
 451 void WieldMeshSceneNode::setColor(video::SColor c)
 452 {
 453         assert(!m_lighting);
 454         scene::IMesh *mesh = m_meshnode->getMesh();
 455         if (!mesh)
 456                 return;
 457
 458         u8 red = c.getRed();
 459         u8 green = c.getGreen();
 460         u8 blue = c.getBlue();
 461         u32 mc = mesh->getMeshBufferCount();
 462         for (u32 j = 0; j < mc; j++) {
 463                 video::SColor bc(m_base_color);
 464                 if ((m_colors.size() > j) && (m_colors[j].override_base))
 465                         bc = m_colors[j].color;
 466                 video::SColor buffercolor(255,
 467                         bc.getRed() * red / 255,
 468                         bc.getGreen() * green / 255,
 469                         bc.getBlue() * blue / 255);
 470                 scene::IMeshBuffer *buf = mesh->getMeshBuffer(j);
 471                 colorizeMeshBuffer(buf, &buffercolor);
 472         }
 473 }
 474
 475 void WieldMeshSceneNode::render()
 476 {
 477         // note: if this method is changed to actually do something,
 478         // you probably should implement OnRegisterSceneNode as well
 479 }
 480
 481 void WieldMeshSceneNode::changeToMesh(scene::IMesh *mesh)
 482 {
 483         if (!mesh) {
 484                 scene::IMesh *dummymesh = g_extrusion_mesh_cache->createCube();
 485                 m_meshnode->setVisible(false);
 486                 m_meshnode->setMesh(dummymesh);
 487                 dummymesh->drop();  // m_meshnode grabbed it
 488         } else {
 489                 m_meshnode->setMesh(mesh);
 490         }
 491
 492         m_meshnode->setMaterialFlag(video::EMF_LIGHTING, m_lighting);
 493         // need to normalize normals when lighting is enabled (because of setScale())
 494         m_meshnode->setMaterialFlag(video::EMF_NORMALIZE_NORMALS, m_lighting);
 495         m_meshnode->setVisible(true);
 496 }
 497
 498 void getItemMesh(Client *client, const ItemStack &item, ItemMesh *result)
 499 {
 500         ITextureSource *tsrc = client->getTextureSource();
 501         IItemDefManager *idef = client->getItemDefManager();
 502         INodeDefManager *ndef = client->getNodeDefManager();
 503         const ItemDefinition &def = item.getDefinition(idef);
 504         const ContentFeatures &f = ndef->get(def.name);
 505         content_t id = ndef->getId(def.name);
 506
 507         if (!g_extrusion_mesh_cache) {
 508                 g_extrusion_mesh_cache = new ExtrusionMeshCache();
 509         } else {
 510                 g_extrusion_mesh_cache->grab();
 511         }
 512
 513         scene::SMesh *mesh = nullptr;
 514
 515         // Shading is on by default
 516         result->needs_shading = true;
 517
 518         // If inventory_image is defined, it overrides everything else
 519         if (!def.inventory_image.empty()) {
 520                 mesh = getExtrudedMesh(tsrc, def.inventory_image,
 521                         def.inventory_overlay);
 522                 result->buffer_colors.emplace_back();
 523                 // overlay is white, if present
 524                 result->buffer_colors.emplace_back(true, video::SColor(0xFFFFFFFF));
 525                 // Items with inventory images do not need shading
 526                 result->needs_shading = false;
 527         } else if (def.type == ITEM_NODE) {
 528                 if (f.mesh_ptr[0]) {
 529                         mesh = cloneMesh(f.mesh_ptr[0]);
 530                         scaleMesh(mesh, v3f(0.12, 0.12, 0.12));
 531                         postProcessNodeMesh(mesh, f, false, false, nullptr,
 532                                 &result->buffer_colors);
 533                 } else {
 534                         switch (f.drawtype) {
 535                                 case NDT_PLANTLIKE: {
 536                                         mesh = getExtrudedMesh(tsrc,
 537                                                 tsrc->getTextureName(f.tiles[0].layers[0].texture_id),
 538                                                 tsrc->getTextureName(f.tiles[0].layers[1].texture_id));
 539                                         // Add color
 540                                         const TileLayer &l0 = f.tiles[0].layers[0];
 541                                         result->buffer_colors.emplace_back(l0.has_color, l0.color);
 542                                         const TileLayer &l1 = f.tiles[0].layers[1];
 543                                         result->buffer_colors.emplace_back(l1.has_color, l1.color);
 544                                         break;
 545                                 }
 546                                 case NDT_PLANTLIKE_ROOTED: {
 547                                         mesh = getExtrudedMesh(tsrc,
 548                                                 tsrc->getTextureName(f.special_tiles[0].layers[0].texture_id), "");
 549                                         // Add color
 550                                         const TileLayer &l0 = f.special_tiles[0].layers[0];
 551                                         result->buffer_colors.emplace_back(l0.has_color, l0.color);
 552                                         break;
 553                                 }
 554                                 case NDT_NORMAL:
 555                                 case NDT_ALLFACES:
 556                                 case NDT_LIQUID:
 557                                 case NDT_FLOWINGLIQUID: {
 558                                         scene::IMesh *cube = g_extrusion_mesh_cache->createCube();
 559                                         mesh = cloneMesh(cube);
 560                                         cube->drop();
 561                                         scaleMesh(mesh, v3f(1.2, 1.2, 1.2));
 562                                         // add overlays
 563                                         postProcessNodeMesh(mesh, f, false, false, nullptr,
 564                                                 &result->buffer_colors);
 565                                         break;
 566                                 }
 567                                 default: {
 568                                         mesh = createSpecialNodeMesh(client, id, &result->buffer_colors);
 569                                         scaleMesh(mesh, v3f(0.12, 0.12, 0.12));
 570                                 }
 571                         }
 572                 }
 573
 574                 u32 mc = mesh->getMeshBufferCount();
 575                 for (u32 i = 0; i < mc; ++i) {
 576                         scene::IMeshBuffer *buf = mesh->getMeshBuffer(i);
 577                         video::SMaterial &material = buf->getMaterial();
 578                         material.MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL;
 579                         material.setFlag(video::EMF_BILINEAR_FILTER, false);
 580                         material.setFlag(video::EMF_TRILINEAR_FILTER, false);
 581                         material.setFlag(video::EMF_BACK_FACE_CULLING, true);
 582                         material.setFlag(video::EMF_LIGHTING, false);
 583                 }
 584
 585                 rotateMeshXZby(mesh, -45);
 586                 rotateMeshYZby(mesh, -30);
 587         }
 588         result->mesh = mesh;
 589 }
 590
 591
 592
 593 scene::SMesh *getExtrudedMesh(ITextureSource *tsrc,
 594         const std::string &imagename, const std::string &overlay_name)
 595 {
 596         // check textures
 597         video::ITexture *texture = tsrc->getTextureForMesh(imagename);
 598         if (!texture) {
 599                 return NULL;
 600         }
 601         video::ITexture *overlay_texture =
 602                 (overlay_name.empty()) ? NULL : tsrc->getTexture(overlay_name);
 603
 604         // get mesh
 605         core::dimension2d<u32> dim = texture->getSize();
 606         scene::IMesh *original = g_extrusion_mesh_cache->create(dim);
 607         scene::SMesh *mesh = cloneMesh(original);
 608         original->drop();
 609
 610         //set texture
 611         mesh->getMeshBuffer(0)->getMaterial().setTexture(0,
 612                 tsrc->getTexture(imagename));
 613         if (overlay_texture) {
 614                 scene::IMeshBuffer *copy = cloneMeshBuffer(mesh->getMeshBuffer(0));
 615                 copy->getMaterial().setTexture(0, overlay_texture);
 616                 mesh->addMeshBuffer(copy);
 617                 copy->drop();
 618         }
 619         // Customize materials
 620         for (u32 layer = 0; layer < mesh->getMeshBufferCount(); layer++) {
 621                 video::SMaterial &material = mesh->getMeshBuffer(layer)->getMaterial();
 622                 material.TextureLayer[0].TextureWrapU = video::ETC_CLAMP_TO_EDGE;
 623                 material.TextureLayer[0].TextureWrapV = video::ETC_CLAMP_TO_EDGE;
 624                 material.setFlag(video::EMF_BILINEAR_FILTER, false);
 625                 material.setFlag(video::EMF_TRILINEAR_FILTER, false);
 626                 material.setFlag(video::EMF_BACK_FACE_CULLING, true);
 627                 material.setFlag(video::EMF_LIGHTING, false);
 628                 material.MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL;
 629         }
 630         scaleMesh(mesh, v3f(2.0, 2.0, 2.0));
 631
 632         return mesh;
 633 }
 634
 635 void postProcessNodeMesh(scene::SMesh *mesh, const ContentFeatures &f,
 636         bool use_shaders, bool set_material, const video::E_MATERIAL_TYPE *mattype,
 637         std::vector<ItemPartColor> *colors, bool apply_scale)
 638 {
 639         u32 mc = mesh->getMeshBufferCount();
 640         // Allocate colors for existing buffers
 641         colors->clear();
 642         for (u32 i = 0; i < mc; ++i)
 643                 colors->push_back(ItemPartColor());
 644
 645         for (u32 i = 0; i < mc; ++i) {
 646                 const TileSpec *tile = &(f.tiles[i]);
 647                 scene::IMeshBuffer *buf = mesh->getMeshBuffer(i);
 648                 for (int layernum = 0; layernum < MAX_TILE_LAYERS; layernum++) {
 649                         const TileLayer *layer = &tile->layers[layernum];
 650                         if (layer->texture_id == 0)
 651                                 continue;
 652                         if (layernum != 0) {
 653                                 scene::IMeshBuffer *copy = cloneMeshBuffer(buf);
 654                                 copy->getMaterial() = buf->getMaterial();
 655                                 mesh->addMeshBuffer(copy);
 656                                 copy->drop();
 657                                 buf = copy;
 658                                 colors->push_back(
 659                                         ItemPartColor(layer->has_color, layer->color));
 660                         } else {
 661                                 (*colors)[i] = ItemPartColor(layer->has_color, layer->color);
 662                         }
 663                         video::SMaterial &material = buf->getMaterial();
 664                         if (set_material)
 665                                 layer->applyMaterialOptions(material);
 666                         if (mattype) {
 667                                 material.MaterialType = *mattype;
 668                         }
 669                         if (layer->animation_frame_count > 1) {
 670                                 const FrameSpec &animation_frame = (*layer->frames)[0];
 671                                 material.setTexture(0, animation_frame.texture);
 672                         } else {
 673                                 material.setTexture(0, layer->texture);
 674                         }
 675                         if (use_shaders) {
 676                                 if (layer->normal_texture) {
 677                                         if (layer->animation_frame_count > 1) {
 678                                                 const FrameSpec &animation_frame = (*layer->frames)[0];
 679                                                 material.setTexture(1, animation_frame.normal_texture);
 680                                         } else
 681                                                 material.setTexture(1, layer->normal_texture);
 682                                 }
 683                                 material.setTexture(2, layer->flags_texture);
 684                         }
 685                         if (apply_scale && tile->world_aligned) {
 686                                 u32 n = buf->getVertexCount();
 687                                 for (u32 k = 0; k != n; ++k)
 688                                         buf->getTCoords(k) /= layer->scale;
 689                         }
 690                 }
 691         }
 692 }