src/client/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/meshgen/collector.h"
  31 #include "client/tile.h"
  32 #include "log.h"
  33 #include "util/numeric.h"
  34 #include <map>
  35 #include <IMeshManipulator.h>
  36
  37 #define WIELD_SCALE_FACTOR 30.0
  38 #define WIELD_SCALE_FACTOR_EXTRUDED 40.0
  39
  40 #define MIN_EXTRUSION_MESH_RESOLUTION 16
  41 #define MAX_EXTRUSION_MESH_RESOLUTION 512
  42
  43 static scene::IMesh *createExtrusionMesh(int resolution_x, int resolution_y)
  44 {
  45         const f32 r = 0.5;
  46
  47         scene::IMeshBuffer *buf = new scene::SMeshBuffer();
  48         video::SColor c(255,255,255,255);
  49         v3f scale(1.0, 1.0, 0.1);
  50
  51         // Front and back
  52         {
  53                 video::S3DVertex vertices[8] = {
  54                         // z-
  55                         video::S3DVertex(-r,+r,-r, 0,0,-1, c, 0,0),
  56                         video::S3DVertex(+r,+r,-r, 0,0,-1, c, 1,0),
  57                         video::S3DVertex(+r,-r,-r, 0,0,-1, c, 1,1),
  58                         video::S3DVertex(-r,-r,-r, 0,0,-1, c, 0,1),
  59                         // z+
  60                         video::S3DVertex(-r,+r,+r, 0,0,+1, c, 0,0),
  61                         video::S3DVertex(-r,-r,+r, 0,0,+1, c, 0,1),
  62                         video::S3DVertex(+r,-r,+r, 0,0,+1, c, 1,1),
  63                         video::S3DVertex(+r,+r,+r, 0,0,+1, c, 1,0),
  64                 };
  65                 u16 indices[12] = {0,1,2,2,3,0,4,5,6,6,7,4};
  66                 buf->append(vertices, 8, indices, 12);
  67         }
  68
  69         f32 pixelsize_x = 1 / (f32) resolution_x;
  70         f32 pixelsize_y = 1 / (f32) resolution_y;
  71
  72         for (int i = 0; i < resolution_x; ++i) {
  73                 f32 pixelpos_x = i * pixelsize_x - 0.5;
  74                 f32 x0 = pixelpos_x;
  75                 f32 x1 = pixelpos_x + pixelsize_x;
  76                 f32 tex0 = (i + 0.1) * pixelsize_x;
  77                 f32 tex1 = (i + 0.9) * pixelsize_x;
  78                 video::S3DVertex vertices[8] = {
  79                         // x-
  80                         video::S3DVertex(x0,-r,-r, -1,0,0, c, tex0,1),
  81                         video::S3DVertex(x0,-r,+r, -1,0,0, c, tex1,1),
  82                         video::S3DVertex(x0,+r,+r, -1,0,0, c, tex1,0),
  83                         video::S3DVertex(x0,+r,-r, -1,0,0, c, tex0,0),
  84                         // x+
  85                         video::S3DVertex(x1,-r,-r, +1,0,0, c, tex0,1),
  86                         video::S3DVertex(x1,+r,-r, +1,0,0, c, tex0,0),
  87                         video::S3DVertex(x1,+r,+r, +1,0,0, c, tex1,0),
  88                         video::S3DVertex(x1,-r,+r, +1,0,0, c, tex1,1),
  89                 };
  90                 u16 indices[12] = {0,1,2,2,3,0,4,5,6,6,7,4};
  91                 buf->append(vertices, 8, indices, 12);
  92         }
  93         for (int i = 0; i < resolution_y; ++i) {
  94                 f32 pixelpos_y = i * pixelsize_y - 0.5;
  95                 f32 y0 = -pixelpos_y - pixelsize_y;
  96                 f32 y1 = -pixelpos_y;
  97                 f32 tex0 = (i + 0.1) * pixelsize_y;
  98                 f32 tex1 = (i + 0.9) * pixelsize_y;
  99                 video::S3DVertex vertices[8] = {
 100                         // y-
 101                         video::S3DVertex(-r,y0,-r, 0,-1,0, c, 0,tex0),
 102                         video::S3DVertex(+r,y0,-r, 0,-1,0, c, 1,tex0),
 103                         video::S3DVertex(+r,y0,+r, 0,-1,0, c, 1,tex1),
 104                         video::S3DVertex(-r,y0,+r, 0,-1,0, c, 0,tex1),
 105                         // y+
 106                         video::S3DVertex(-r,y1,-r, 0,+1,0, c, 0,tex0),
 107                         video::S3DVertex(-r,y1,+r, 0,+1,0, c, 0,tex1),
 108                         video::S3DVertex(+r,y1,+r, 0,+1,0, c, 1,tex1),
 109                         video::S3DVertex(+r,y1,-r, 0,+1,0, c, 1,tex0),
 110                 };
 111                 u16 indices[12] = {0,1,2,2,3,0,4,5,6,6,7,4};
 112                 buf->append(vertices, 8, indices, 12);
 113         }
 114
 115         // Create mesh object
 116         scene::SMesh *mesh = new scene::SMesh();
 117         mesh->addMeshBuffer(buf);
 118         buf->drop();
 119         scaleMesh(mesh, scale);  // also recalculates bounding box
 120         return mesh;
 121 }
 122
 123 /*
 124         Caches extrusion meshes so that only one of them per resolution
 125         is needed. Also caches one cube (for convenience).
 126
 127         E.g. there is a single extrusion mesh that is used for all
 128         16x16 px images, another for all 256x256 px images, and so on.
 129
 130         WARNING: Not thread safe. This should not be a problem since
 131         rendering related classes (such as WieldMeshSceneNode) will be
 132         used from the rendering thread only.
 133 */
 134 class ExtrusionMeshCache: public IReferenceCounted
 135 {
 136 public:
 137         // Constructor
 138         ExtrusionMeshCache()
 139         {
 140                 for (int resolution = MIN_EXTRUSION_MESH_RESOLUTION;
 141                                 resolution <= MAX_EXTRUSION_MESH_RESOLUTION;
 142                                 resolution *= 2) {
 143                         m_extrusion_meshes[resolution] =
 144                                 createExtrusionMesh(resolution, resolution);
 145                 }
 146                 m_cube = createCubeMesh(v3f(1.0, 1.0, 1.0));
 147         }
 148         // Destructor
 149         virtual ~ExtrusionMeshCache()
 150         {
 151                 for (auto &extrusion_meshe : m_extrusion_meshes) {
 152                         extrusion_meshe.second->drop();
 153                 }
 154                 m_cube->drop();
 155         }
 156         // Get closest extrusion mesh for given image dimensions
 157         // Caller must drop the returned pointer
 158         scene::IMesh* create(core::dimension2d<u32> dim)
 159         {
 160                 // handle non-power of two textures inefficiently without cache
 161                 if (!is_power_of_two(dim.Width) || !is_power_of_two(dim.Height)) {
 162                         return createExtrusionMesh(dim.Width, dim.Height);
 163                 }
 164
 165                 int maxdim = MYMAX(dim.Width, dim.Height);
 166
 167                 std::map<int, scene::IMesh*>::iterator
 168                         it = m_extrusion_meshes.lower_bound(maxdim);
 169
 170                 if (it == m_extrusion_meshes.end()) {
 171                         // no viable resolution found; use largest one
 172                         it = m_extrusion_meshes.find(MAX_EXTRUSION_MESH_RESOLUTION);
 173                         sanity_check(it != m_extrusion_meshes.end());
 174                 }
 175
 176                 scene::IMesh *mesh = it->second;
 177                 mesh->grab();
 178                 return mesh;
 179         }
 180         // Returns a 1x1x1 cube mesh with one meshbuffer (material) per face
 181         // Caller must drop the returned pointer
 182         scene::IMesh* createCube()
 183         {
 184                 m_cube->grab();
 185                 return m_cube;
 186         }
 187
 188 private:
 189         std::map<int, scene::IMesh*> m_extrusion_meshes;
 190         scene::IMesh *m_cube;
 191 };
 192
 193 ExtrusionMeshCache *g_extrusion_mesh_cache = NULL;
 194
 195
 196 WieldMeshSceneNode::WieldMeshSceneNode(scene::ISceneManager *mgr, s32 id, bool lighting):
 197         scene::ISceneNode(mgr->getRootSceneNode(), mgr, id),
 198         m_material_type(video::EMT_TRANSPARENT_ALPHA_CHANNEL_REF),
 199         m_lighting(lighting)
 200 {
 201         m_enable_shaders = g_settings->getBool("enable_shaders");
 202         m_anisotropic_filter = g_settings->getBool("anisotropic_filter");
 203         m_bilinear_filter = g_settings->getBool("bilinear_filter");
 204         m_trilinear_filter = g_settings->getBool("trilinear_filter");
 205
 206         // If this is the first wield mesh scene node, create a cache
 207         // for extrusion meshes (and a cube mesh), otherwise reuse it
 208         if (!g_extrusion_mesh_cache)
 209                 g_extrusion_mesh_cache = new ExtrusionMeshCache();
 210         else
 211                 g_extrusion_mesh_cache->grab();
 212
 213         // Disable bounding box culling for this scene node
 214         // since we won't calculate the bounding box.
 215         setAutomaticCulling(scene::EAC_OFF);
 216
 217         // Create the child scene node
 218         scene::IMesh *dummymesh = g_extrusion_mesh_cache->createCube();
 219         m_meshnode = SceneManager->addMeshSceneNode(dummymesh, this, -1);
 220         m_meshnode->setReadOnlyMaterials(false);
 221         m_meshnode->setVisible(false);
 222         dummymesh->drop(); // m_meshnode grabbed it
 223 }
 224
 225 WieldMeshSceneNode::~WieldMeshSceneNode()
 226 {
 227         sanity_check(g_extrusion_mesh_cache);
 228         if (g_extrusion_mesh_cache->drop())
 229                 g_extrusion_mesh_cache = nullptr;
 230 }
 231
 232 void WieldMeshSceneNode::setCube(const ContentFeatures &f,
 233                         v3f wield_scale)
 234 {
 235         scene::IMesh *cubemesh = g_extrusion_mesh_cache->createCube();
 236         scene::SMesh *copy = cloneMesh(cubemesh);
 237         cubemesh->drop();
 238         postProcessNodeMesh(copy, f, false, true, &m_material_type, &m_colors, true);
 239         changeToMesh(copy);
 240         copy->drop();
 241         m_meshnode->setScale(wield_scale * WIELD_SCALE_FACTOR);
 242 }
 243
 244 void WieldMeshSceneNode::setExtruded(const std::string &imagename,
 245         const std::string &overlay_name, v3f wield_scale, ITextureSource *tsrc,
 246         u8 num_frames)
 247 {
 248         video::ITexture *texture = tsrc->getTexture(imagename);
 249         if (!texture) {
 250                 changeToMesh(nullptr);
 251                 return;
 252         }
 253         video::ITexture *overlay_texture =
 254                 overlay_name.empty() ? NULL : tsrc->getTexture(overlay_name);
 255
 256         core::dimension2d<u32> dim = texture->getSize();
 257         // Detect animation texture and pull off top frame instead of using entire thing
 258         if (num_frames > 1) {
 259                 u32 frame_height = dim.Height / num_frames;
 260                 dim = core::dimension2d<u32>(dim.Width, frame_height);
 261         }
 262         scene::IMesh *original = g_extrusion_mesh_cache->create(dim);
 263         scene::SMesh *mesh = cloneMesh(original);
 264         original->drop();
 265         //set texture
 266         mesh->getMeshBuffer(0)->getMaterial().setTexture(0,
 267                 tsrc->getTexture(imagename));
 268         if (overlay_texture) {
 269                 scene::IMeshBuffer *copy = cloneMeshBuffer(mesh->getMeshBuffer(0));
 270                 copy->getMaterial().setTexture(0, overlay_texture);
 271                 mesh->addMeshBuffer(copy);
 272                 copy->drop();
 273         }
 274         changeToMesh(mesh);
 275         mesh->drop();
 276
 277         m_meshnode->setScale(wield_scale * WIELD_SCALE_FACTOR_EXTRUDED);
 278
 279         // Customize materials
 280         for (u32 layer = 0; layer < m_meshnode->getMaterialCount(); layer++) {
 281                 video::SMaterial &material = m_meshnode->getMaterial(layer);
 282                 material.TextureLayer[0].TextureWrapU = video::ETC_CLAMP_TO_EDGE;
 283                 material.TextureLayer[0].TextureWrapV = video::ETC_CLAMP_TO_EDGE;
 284                 material.MaterialType = m_material_type;
 285                 material.MaterialTypeParam = 0.5f;
 286                 material.setFlag(video::EMF_BACK_FACE_CULLING, true);
 287                 // Enable bi/trilinear filtering only for high resolution textures
 288                 if (dim.Width > 32) {
 289                         material.setFlag(video::EMF_BILINEAR_FILTER, m_bilinear_filter);
 290                         material.setFlag(video::EMF_TRILINEAR_FILTER, m_trilinear_filter);
 291                 } else {
 292                         material.setFlag(video::EMF_BILINEAR_FILTER, false);
 293                         material.setFlag(video::EMF_TRILINEAR_FILTER, false);
 294                 }
 295                 material.setFlag(video::EMF_ANISOTROPIC_FILTER, m_anisotropic_filter);
 296                 // mipmaps cause "thin black line" artifacts
 297 #if (IRRLICHT_VERSION_MAJOR >= 1 && IRRLICHT_VERSION_MINOR >= 8) || IRRLICHT_VERSION_MAJOR >= 2
 298                 material.setFlag(video::EMF_USE_MIP_MAPS, false);
 299 #endif
 300                 if (m_enable_shaders) {
 301                         material.setTexture(2, tsrc->getShaderFlagsTexture(false));
 302                 }
 303         }
 304 }
 305
 306 scene::SMesh *createSpecialNodeMesh(Client *client, content_t id, std::vector<ItemPartColor> *colors, const ContentFeatures &f)
 307 {
 308         MeshMakeData mesh_make_data(client, false);
 309         MeshCollector collector;
 310         mesh_make_data.setSmoothLighting(false);
 311         MapblockMeshGenerator gen(&mesh_make_data, &collector);
 312         u8 param2 = 0;
 313         if (f.param_type_2 == CPT2_WALLMOUNTED ||
 314                         f.param_type_2 == CPT2_COLORED_WALLMOUNTED) {
 315                 if (f.drawtype == NDT_TORCHLIKE)
 316                         param2 = 1;
 317                 else if (f.drawtype == NDT_SIGNLIKE ||
 318                                 f.drawtype == NDT_NODEBOX ||
 319                                 f.drawtype == NDT_MESH)
 320                         param2 = 4;
 321         }
 322         gen.renderSingle(id, param2);
 323
 324         colors->clear();
 325         scene::SMesh *mesh = new scene::SMesh();
 326         for (auto &prebuffers : collector.prebuffers)
 327                 for (PreMeshBuffer &p : prebuffers) {
 328                         if (p.layer.material_flags & MATERIAL_FLAG_ANIMATION) {
 329                                 const FrameSpec &frame = (*p.layer.frames)[0];
 330                                 p.layer.texture = frame.texture;
 331                                 p.layer.normal_texture = frame.normal_texture;
 332                         }
 333                         for (video::S3DVertex &v : p.vertices) {
 334                                 v.Color.setAlpha(255);
 335                         }
 336                         scene::SMeshBuffer *buf = new scene::SMeshBuffer();
 337                         buf->Material.setTexture(0, p.layer.texture);
 338                         p.layer.applyMaterialOptions(buf->Material);
 339                         mesh->addMeshBuffer(buf);
 340                         buf->append(&p.vertices[0], p.vertices.size(),
 341                                         &p.indices[0], p.indices.size());
 342                         buf->drop();
 343                         colors->push_back(
 344                                 ItemPartColor(p.layer.has_color, p.layer.color));
 345                 }
 346         return mesh;
 347 }
 348
 349 void WieldMeshSceneNode::setItem(const ItemStack &item, Client *client, bool check_wield_image)
 350 {
 351         ITextureSource *tsrc = client->getTextureSource();
 352         IItemDefManager *idef = client->getItemDefManager();
 353         IShaderSource *shdrsrc = client->getShaderSource();
 354         const NodeDefManager *ndef = client->getNodeDefManager();
 355         const ItemDefinition &def = item.getDefinition(idef);
 356         const ContentFeatures &f = ndef->get(def.name);
 357         content_t id = ndef->getId(def.name);
 358
 359         scene::SMesh *mesh = nullptr;
 360
 361         if (m_enable_shaders) {
 362                 u32 shader_id = shdrsrc->getShader("object_shader", TILE_MATERIAL_BASIC, NDT_NORMAL);
 363                 m_material_type = shdrsrc->getShaderInfo(shader_id).material;
 364         }
 365
 366         // Color-related
 367         m_colors.clear();
 368         m_base_color = idef->getItemstackColor(item, client);
 369
 370         // If wield_image needs to be checked and is defined, it overrides everything else
 371         if (!def.wield_image.empty() && check_wield_image) {
 372                 setExtruded(def.wield_image, def.wield_overlay, def.wield_scale, tsrc,
 373                         1);
 374                 m_colors.emplace_back();
 375                 // overlay is white, if present
 376                 m_colors.emplace_back(true, video::SColor(0xFFFFFFFF));
 377                 return;
 378         }
 379
 380         // Handle nodes
 381         // See also CItemDefManager::createClientCached()
 382         if (def.type == ITEM_NODE) {
 383                 bool cull_backface = f.needsBackfaceCulling();
 384
 385                 // Select rendering method
 386                 switch (f.drawtype) {
 387                 case NDT_AIRLIKE:
 388                         setExtruded("no_texture_airlike.png", "",
 389                                 v3f(1.0, 1.0, 1.0), tsrc, 1);
 390                         break;
 391                 case NDT_SIGNLIKE:
 392                 case NDT_TORCHLIKE:
 393                 case NDT_RAILLIKE:
 394                 case NDT_PLANTLIKE:
 395                 case NDT_PLANTLIKE_ROOTED:
 396                 case NDT_FLOWINGLIQUID: {
 397                         v3f wscale = def.wield_scale;
 398                         if (f.drawtype == NDT_FLOWINGLIQUID)
 399                                 wscale.Z *= 0.1f;
 400                         setExtruded(tsrc->getTextureName(f.tiles[0].layers[0].texture_id),
 401                                 tsrc->getTextureName(f.tiles[0].layers[1].texture_id),
 402                                 wscale, tsrc,
 403                                 f.tiles[0].layers[0].animation_frame_count);
 404                         // Add color
 405                         const TileLayer &l0 = f.tiles[0].layers[0];
 406                         m_colors.emplace_back(l0.has_color, l0.color);
 407                         const TileLayer &l1 = f.tiles[0].layers[1];
 408                         m_colors.emplace_back(l1.has_color, l1.color);
 409                         break;
 410                 }
 411                 case NDT_NORMAL:
 412                 case NDT_ALLFACES:
 413                 case NDT_LIQUID:
 414                         setCube(f, def.wield_scale);
 415                         break;
 416                 default:
 417                         // Render non-trivial drawtypes like the actual node
 418                         mesh = createSpecialNodeMesh(client, id, &m_colors, f);
 419                         changeToMesh(mesh);
 420                         mesh->drop();
 421                         m_meshnode->setScale(
 422                                 def.wield_scale * WIELD_SCALE_FACTOR
 423                                 / (BS * f.visual_scale));
 424                         break;
 425                 }
 426
 427                 u32 material_count = m_meshnode->getMaterialCount();
 428                 for (u32 i = 0; i < material_count; ++i) {
 429                         video::SMaterial &material = m_meshnode->getMaterial(i);
 430                         material.MaterialType = m_material_type;
 431                         material.MaterialTypeParam = 0.5f;
 432                         material.setFlag(video::EMF_BACK_FACE_CULLING, cull_backface);
 433                         material.setFlag(video::EMF_BILINEAR_FILTER, m_bilinear_filter);
 434                         material.setFlag(video::EMF_TRILINEAR_FILTER, m_trilinear_filter);
 435                 }
 436                 return;
 437         } else if (!def.inventory_image.empty()) {
 438                 setExtruded(def.inventory_image, def.inventory_overlay, def.wield_scale,
 439                         tsrc, 1);
 440                 m_colors.emplace_back();
 441                 // overlay is white, if present
 442                 m_colors.emplace_back(true, video::SColor(0xFFFFFFFF));
 443                 return;
 444         }
 445
 446         // no wield mesh found
 447         changeToMesh(nullptr);
 448 }
 449
 450 void WieldMeshSceneNode::setColor(video::SColor c)
 451 {
 452         assert(!m_lighting);
 453         scene::IMesh *mesh = m_meshnode->getMesh();
 454         if (!mesh)
 455                 return;
 456
 457         u8 red = c.getRed();
 458         u8 green = c.getGreen();
 459         u8 blue = c.getBlue();
 460         u32 mc = mesh->getMeshBufferCount();
 461         for (u32 j = 0; j < mc; j++) {
 462                 video::SColor bc(m_base_color);
 463                 if ((m_colors.size() > j) && (m_colors[j].override_base))
 464                         bc = m_colors[j].color;
 465                 video::SColor buffercolor(255,
 466                         bc.getRed() * red / 255,
 467                         bc.getGreen() * green / 255,
 468                         bc.getBlue() * blue / 255);
 469                 scene::IMeshBuffer *buf = mesh->getMeshBuffer(j);
 470
 471                 if (m_enable_shaders)
 472                         setMeshBufferColor(buf, buffercolor);
 473                 else
 474                         colorizeMeshBuffer(buf, &buffercolor);
 475         }
 476 }
 477
 478 void WieldMeshSceneNode::setNodeLightColor(video::SColor color)
 479 {
 480         if (!m_meshnode)
 481                 return;
 482
 483         if (m_enable_shaders) {
 484                 for (u32 i = 0; i < m_meshnode->getMaterialCount(); ++i) {
 485                         video::SMaterial &material = m_meshnode->getMaterial(i);
 486                         material.EmissiveColor = color;
 487                 }
 488         }
 489
 490         setColor(color);
 491 }
 492
 493 void WieldMeshSceneNode::render()
 494 {
 495         // note: if this method is changed to actually do something,
 496         // you probably should implement OnRegisterSceneNode as well
 497 }
 498
 499 void WieldMeshSceneNode::changeToMesh(scene::IMesh *mesh)
 500 {
 501         if (!mesh) {
 502                 scene::IMesh *dummymesh = g_extrusion_mesh_cache->createCube();
 503                 m_meshnode->setVisible(false);
 504                 m_meshnode->setMesh(dummymesh);
 505                 dummymesh->drop();  // m_meshnode grabbed it
 506         } else {
 507                 m_meshnode->setMesh(mesh);
 508         }
 509
 510         m_meshnode->setMaterialFlag(video::EMF_LIGHTING, m_lighting);
 511         // need to normalize normals when lighting is enabled (because of setScale())
 512         m_meshnode->setMaterialFlag(video::EMF_NORMALIZE_NORMALS, m_lighting);
 513         m_meshnode->setVisible(true);
 514 }
 515
 516 void getItemMesh(Client *client, const ItemStack &item, ItemMesh *result)
 517 {
 518         ITextureSource *tsrc = client->getTextureSource();
 519         IItemDefManager *idef = client->getItemDefManager();
 520         const NodeDefManager *ndef = client->getNodeDefManager();
 521         const ItemDefinition &def = item.getDefinition(idef);
 522         const ContentFeatures &f = ndef->get(def.name);
 523         content_t id = ndef->getId(def.name);
 524
 525         FATAL_ERROR_IF(!g_extrusion_mesh_cache, "Extrusion mesh cache is not yet initialized");
 526
 527         scene::SMesh *mesh = nullptr;
 528
 529         // Shading is on by default
 530         result->needs_shading = true;
 531
 532         bool cull_backface = f.needsBackfaceCulling();
 533
 534         // If inventory_image is defined, it overrides everything else
 535         if (!def.inventory_image.empty()) {
 536                 mesh = getExtrudedMesh(tsrc, def.inventory_image,
 537                         def.inventory_overlay);
 538                 result->buffer_colors.emplace_back();
 539                 // overlay is white, if present
 540                 result->buffer_colors.emplace_back(true, video::SColor(0xFFFFFFFF));
 541                 // Items with inventory images do not need shading
 542                 result->needs_shading = false;
 543         } else if (def.type == ITEM_NODE && f.drawtype == NDT_AIRLIKE) {
 544                 // Fallback image for airlike node
 545                 mesh = getExtrudedMesh(tsrc, "no_texture_airlike.png",
 546                         def.inventory_overlay);
 547                 result->needs_shading = false;
 548         } else if (def.type == ITEM_NODE) {
 549                 switch (f.drawtype) {
 550                 case NDT_NORMAL:
 551                 case NDT_ALLFACES:
 552                 case NDT_LIQUID:
 553                 case NDT_FLOWINGLIQUID: {
 554                         scene::IMesh *cube = g_extrusion_mesh_cache->createCube();
 555                         mesh = cloneMesh(cube);
 556                         cube->drop();
 557                         if (f.drawtype == NDT_FLOWINGLIQUID) {
 558                                 scaleMesh(mesh, v3f(1.2, 0.03, 1.2));
 559                                 translateMesh(mesh, v3f(0, -0.57, 0));
 560                         } else
 561                                 scaleMesh(mesh, v3f(1.2, 1.2, 1.2));
 562                         // add overlays
 563                         postProcessNodeMesh(mesh, f, false, false, nullptr,
 564                                 &result->buffer_colors, true);
 565                         if (f.drawtype == NDT_ALLFACES)
 566                                 scaleMesh(mesh, v3f(f.visual_scale));
 567                         break;
 568                 }
 569                 case NDT_PLANTLIKE: {
 570                         mesh = getExtrudedMesh(tsrc,
 571                                 tsrc->getTextureName(f.tiles[0].layers[0].texture_id),
 572                                 tsrc->getTextureName(f.tiles[0].layers[1].texture_id));
 573                         // Add color
 574                         const TileLayer &l0 = f.tiles[0].layers[0];
 575                         result->buffer_colors.emplace_back(l0.has_color, l0.color);
 576                         const TileLayer &l1 = f.tiles[0].layers[1];
 577                         result->buffer_colors.emplace_back(l1.has_color, l1.color);
 578                         break;
 579                 }
 580                 case NDT_PLANTLIKE_ROOTED: {
 581                         mesh = getExtrudedMesh(tsrc,
 582                                 tsrc->getTextureName(f.special_tiles[0].layers[0].texture_id), "");
 583                         // Add color
 584                         const TileLayer &l0 = f.special_tiles[0].layers[0];
 585                         result->buffer_colors.emplace_back(l0.has_color, l0.color);
 586                         break;
 587                 }
 588                 default:
 589                         // Render non-trivial drawtypes like the actual node
 590                         mesh = createSpecialNodeMesh(client, id, &result->buffer_colors, f);
 591                         scaleMesh(mesh, v3f(0.12, 0.12, 0.12));
 592                         break;
 593                 }
 594
 595                 u32 mc = mesh->getMeshBufferCount();
 596                 for (u32 i = 0; i < mc; ++i) {
 597                         scene::IMeshBuffer *buf = mesh->getMeshBuffer(i);
 598                         video::SMaterial &material = buf->getMaterial();
 599                         material.MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL;
 600                         material.MaterialTypeParam = 0.5f;
 601                         material.setFlag(video::EMF_BILINEAR_FILTER, false);
 602                         material.setFlag(video::EMF_TRILINEAR_FILTER, false);
 603                         material.setFlag(video::EMF_BACK_FACE_CULLING, cull_backface);
 604                         material.setFlag(video::EMF_LIGHTING, false);
 605                 }
 606
 607                 rotateMeshXZby(mesh, -45);
 608                 rotateMeshYZby(mesh, -30);
 609         }
 610         result->mesh = mesh;
 611 }
 612
 613
 614
 615 scene::SMesh *getExtrudedMesh(ITextureSource *tsrc,
 616         const std::string &imagename, const std::string &overlay_name)
 617 {
 618         // check textures
 619         video::ITexture *texture = tsrc->getTextureForMesh(imagename);
 620         if (!texture) {
 621                 return NULL;
 622         }
 623         video::ITexture *overlay_texture =
 624                 (overlay_name.empty()) ? NULL : tsrc->getTexture(overlay_name);
 625
 626         // get mesh
 627         core::dimension2d<u32> dim = texture->getSize();
 628         scene::IMesh *original = g_extrusion_mesh_cache->create(dim);
 629         scene::SMesh *mesh = cloneMesh(original);
 630         original->drop();
 631
 632         //set texture
 633         mesh->getMeshBuffer(0)->getMaterial().setTexture(0,
 634                 tsrc->getTexture(imagename));
 635         if (overlay_texture) {
 636                 scene::IMeshBuffer *copy = cloneMeshBuffer(mesh->getMeshBuffer(0));
 637                 copy->getMaterial().setTexture(0, overlay_texture);
 638                 mesh->addMeshBuffer(copy);
 639                 copy->drop();
 640         }
 641         // Customize materials
 642         for (u32 layer = 0; layer < mesh->getMeshBufferCount(); layer++) {
 643                 video::SMaterial &material = mesh->getMeshBuffer(layer)->getMaterial();
 644                 material.TextureLayer[0].TextureWrapU = video::ETC_CLAMP_TO_EDGE;
 645                 material.TextureLayer[0].TextureWrapV = video::ETC_CLAMP_TO_EDGE;
 646                 material.setFlag(video::EMF_BILINEAR_FILTER, false);
 647                 material.setFlag(video::EMF_TRILINEAR_FILTER, false);
 648                 material.setFlag(video::EMF_BACK_FACE_CULLING, true);
 649                 material.setFlag(video::EMF_LIGHTING, false);
 650                 material.MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL;
 651                 material.MaterialTypeParam = 0.5f;
 652         }
 653         scaleMesh(mesh, v3f(2.0, 2.0, 2.0));
 654
 655         return mesh;
 656 }
 657
 658 void postProcessNodeMesh(scene::SMesh *mesh, const ContentFeatures &f,
 659         bool use_shaders, bool set_material, const video::E_MATERIAL_TYPE *mattype,
 660         std::vector<ItemPartColor> *colors, bool apply_scale)
 661 {
 662         u32 mc = mesh->getMeshBufferCount();
 663         // Allocate colors for existing buffers
 664         colors->clear();
 665         for (u32 i = 0; i < mc; ++i)
 666                 colors->push_back(ItemPartColor());
 667
 668         for (u32 i = 0; i < mc; ++i) {
 669                 const TileSpec *tile = &(f.tiles[i]);
 670                 scene::IMeshBuffer *buf = mesh->getMeshBuffer(i);
 671                 for (int layernum = 0; layernum < MAX_TILE_LAYERS; layernum++) {
 672                         const TileLayer *layer = &tile->layers[layernum];
 673                         if (layer->texture_id == 0)
 674                                 continue;
 675                         if (layernum != 0) {
 676                                 scene::IMeshBuffer *copy = cloneMeshBuffer(buf);
 677                                 copy->getMaterial() = buf->getMaterial();
 678                                 mesh->addMeshBuffer(copy);
 679                                 copy->drop();
 680                                 buf = copy;
 681                                 colors->push_back(
 682                                         ItemPartColor(layer->has_color, layer->color));
 683                         } else {
 684                                 (*colors)[i] = ItemPartColor(layer->has_color, layer->color);
 685                         }
 686                         video::SMaterial &material = buf->getMaterial();
 687                         if (set_material)
 688                                 layer->applyMaterialOptions(material);
 689                         if (mattype) {
 690                                 material.MaterialType = *mattype;
 691                         }
 692                         if (layer->animation_frame_count > 1) {
 693                                 const FrameSpec &animation_frame = (*layer->frames)[0];
 694                                 material.setTexture(0, animation_frame.texture);
 695                         } else {
 696                                 material.setTexture(0, layer->texture);
 697                         }
 698                         if (use_shaders) {
 699                                 if (layer->normal_texture) {
 700                                         if (layer->animation_frame_count > 1) {
 701                                                 const FrameSpec &animation_frame = (*layer->frames)[0];
 702                                                 material.setTexture(1, animation_frame.normal_texture);
 703                                         } else
 704                                                 material.setTexture(1, layer->normal_texture);
 705                                 }
 706                                 material.setTexture(2, layer->flags_texture);
 707                         }
 708                         if (apply_scale && tile->world_aligned) {
 709                                 u32 n = buf->getVertexCount();
 710                                 for (u32 k = 0; k != n; ++k)
 711                                         buf->getTCoords(k) /= layer->scale;
 712                         }
 713                 }
 714         }
 715 }