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 #include "client/renderingengine.h"
  37
  38 #define WIELD_SCALE_FACTOR 30.0
  39 #define WIELD_SCALE_FACTOR_EXTRUDED 40.0
  40
  41 #define MIN_EXTRUSION_MESH_RESOLUTION 16
  42 #define MAX_EXTRUSION_MESH_RESOLUTION 512
  43
  44 static scene::IMesh *createExtrusionMesh(int resolution_x, int resolution_y)
  45 {
  46         const f32 r = 0.5;
  47
  48         scene::IMeshBuffer *buf = new scene::SMeshBuffer();
  49         video::SColor c(255,255,255,255);
  50         v3f scale(1.0, 1.0, 0.1);
  51
  52         // Front and back
  53         {
  54                 video::S3DVertex vertices[8] = {
  55                         // z-
  56                         video::S3DVertex(-r,+r,-r, 0,0,-1, c, 0,0),
  57                         video::S3DVertex(+r,+r,-r, 0,0,-1, c, 1,0),
  58                         video::S3DVertex(+r,-r,-r, 0,0,-1, c, 1,1),
  59                         video::S3DVertex(-r,-r,-r, 0,0,-1, c, 0,1),
  60                         // z+
  61                         video::S3DVertex(-r,+r,+r, 0,0,+1, c, 0,0),
  62                         video::S3DVertex(-r,-r,+r, 0,0,+1, c, 0,1),
  63                         video::S3DVertex(+r,-r,+r, 0,0,+1, c, 1,1),
  64                         video::S3DVertex(+r,+r,+r, 0,0,+1, c, 1,0),
  65                 };
  66                 u16 indices[12] = {0,1,2,2,3,0,4,5,6,6,7,4};
  67                 buf->append(vertices, 8, indices, 12);
  68         }
  69
  70         f32 pixelsize_x = 1 / (f32) resolution_x;
  71         f32 pixelsize_y = 1 / (f32) resolution_y;
  72
  73         for (int i = 0; i < resolution_x; ++i) {
  74                 f32 pixelpos_x = i * pixelsize_x - 0.5;
  75                 f32 x0 = pixelpos_x;
  76                 f32 x1 = pixelpos_x + pixelsize_x;
  77                 f32 tex0 = (i + 0.1) * pixelsize_x;
  78                 f32 tex1 = (i + 0.9) * pixelsize_x;
  79                 video::S3DVertex vertices[8] = {
  80                         // x-
  81                         video::S3DVertex(x0,-r,-r, -1,0,0, c, tex0,1),
  82                         video::S3DVertex(x0,-r,+r, -1,0,0, c, tex1,1),
  83                         video::S3DVertex(x0,+r,+r, -1,0,0, c, tex1,0),
  84                         video::S3DVertex(x0,+r,-r, -1,0,0, c, tex0,0),
  85                         // x+
  86                         video::S3DVertex(x1,-r,-r, +1,0,0, c, tex0,1),
  87                         video::S3DVertex(x1,+r,-r, +1,0,0, c, tex0,0),
  88                         video::S3DVertex(x1,+r,+r, +1,0,0, c, tex1,0),
  89                         video::S3DVertex(x1,-r,+r, +1,0,0, c, tex1,1),
  90                 };
  91                 u16 indices[12] = {0,1,2,2,3,0,4,5,6,6,7,4};
  92                 buf->append(vertices, 8, indices, 12);
  93         }
  94         for (int i = 0; i < resolution_y; ++i) {
  95                 f32 pixelpos_y = i * pixelsize_y - 0.5;
  96                 f32 y0 = -pixelpos_y - pixelsize_y;
  97                 f32 y1 = -pixelpos_y;
  98                 f32 tex0 = (i + 0.1) * pixelsize_y;
  99                 f32 tex1 = (i + 0.9) * pixelsize_y;
 100                 video::S3DVertex vertices[8] = {
 101                         // y-
 102                         video::S3DVertex(-r,y0,-r, 0,-1,0, c, 0,tex0),
 103                         video::S3DVertex(+r,y0,-r, 0,-1,0, c, 1,tex0),
 104                         video::S3DVertex(+r,y0,+r, 0,-1,0, c, 1,tex1),
 105                         video::S3DVertex(-r,y0,+r, 0,-1,0, c, 0,tex1),
 106                         // y+
 107                         video::S3DVertex(-r,y1,-r, 0,+1,0, c, 0,tex0),
 108                         video::S3DVertex(-r,y1,+r, 0,+1,0, c, 0,tex1),
 109                         video::S3DVertex(+r,y1,+r, 0,+1,0, c, 1,tex1),
 110                         video::S3DVertex(+r,y1,-r, 0,+1,0, c, 1,tex0),
 111                 };
 112                 u16 indices[12] = {0,1,2,2,3,0,4,5,6,6,7,4};
 113                 buf->append(vertices, 8, indices, 12);
 114         }
 115
 116         // Create mesh object
 117         scene::SMesh *mesh = new scene::SMesh();
 118         mesh->addMeshBuffer(buf);
 119         buf->drop();
 120         scaleMesh(mesh, scale);  // also recalculates bounding box
 121         return mesh;
 122 }
 123
 124 /*
 125         Caches extrusion meshes so that only one of them per resolution
 126         is needed. Also caches one cube (for convenience).
 127
 128         E.g. there is a single extrusion mesh that is used for all
 129         16x16 px images, another for all 256x256 px images, and so on.
 130
 131         WARNING: Not thread safe. This should not be a problem since
 132         rendering related classes (such as WieldMeshSceneNode) will be
 133         used from the rendering thread only.
 134 */
 135 class ExtrusionMeshCache: public IReferenceCounted
 136 {
 137 public:
 138         // Constructor
 139         ExtrusionMeshCache()
 140         {
 141                 for (int resolution = MIN_EXTRUSION_MESH_RESOLUTION;
 142                                 resolution <= MAX_EXTRUSION_MESH_RESOLUTION;
 143                                 resolution *= 2) {
 144                         m_extrusion_meshes[resolution] =
 145                                 createExtrusionMesh(resolution, resolution);
 146                 }
 147                 m_cube = createCubeMesh(v3f(1.0, 1.0, 1.0));
 148         }
 149         // Destructor
 150         virtual ~ExtrusionMeshCache()
 151         {
 152                 for (auto &extrusion_meshe : m_extrusion_meshes) {
 153                         extrusion_meshe.second->drop();
 154                 }
 155                 m_cube->drop();
 156         }
 157         // Get closest extrusion mesh for given image dimensions
 158         // Caller must drop the returned pointer
 159         scene::IMesh* create(core::dimension2d<u32> dim)
 160         {
 161                 // handle non-power of two textures inefficiently without cache
 162                 if (!is_power_of_two(dim.Width) || !is_power_of_two(dim.Height)) {
 163                         return createExtrusionMesh(dim.Width, dim.Height);
 164                 }
 165
 166                 int maxdim = MYMAX(dim.Width, dim.Height);
 167
 168                 std::map<int, scene::IMesh*>::iterator
 169                         it = m_extrusion_meshes.lower_bound(maxdim);
 170
 171                 if (it == m_extrusion_meshes.end()) {
 172                         // no viable resolution found; use largest one
 173                         it = m_extrusion_meshes.find(MAX_EXTRUSION_MESH_RESOLUTION);
 174                         sanity_check(it != m_extrusion_meshes.end());
 175                 }
 176
 177                 scene::IMesh *mesh = it->second;
 178                 mesh->grab();
 179                 return mesh;
 180         }
 181         // Returns a 1x1x1 cube mesh with one meshbuffer (material) per face
 182         // Caller must drop the returned pointer
 183         scene::IMesh* createCube()
 184         {
 185                 m_cube->grab();
 186                 return m_cube;
 187         }
 188
 189 private:
 190         std::map<int, scene::IMesh*> m_extrusion_meshes;
 191         scene::IMesh *m_cube;
 192 };
 193
 194 ExtrusionMeshCache *g_extrusion_mesh_cache = NULL;
 195
 196
 197 WieldMeshSceneNode::WieldMeshSceneNode(scene::ISceneManager *mgr, s32 id, bool lighting):
 198         scene::ISceneNode(mgr->getRootSceneNode(), mgr, id),
 199         m_material_type(video::EMT_TRANSPARENT_ALPHA_CHANNEL_REF),
 200         m_lighting(lighting)
 201 {
 202         m_enable_shaders = g_settings->getBool("enable_shaders");
 203         m_anisotropic_filter = g_settings->getBool("anisotropic_filter");
 204         m_bilinear_filter = g_settings->getBool("bilinear_filter");
 205         m_trilinear_filter = g_settings->getBool("trilinear_filter");
 206
 207         // If this is the first wield mesh scene node, create a cache
 208         // for extrusion meshes (and a cube mesh), otherwise reuse it
 209         if (!g_extrusion_mesh_cache)
 210                 g_extrusion_mesh_cache = new ExtrusionMeshCache();
 211         else
 212                 g_extrusion_mesh_cache->grab();
 213
 214         // Disable bounding box culling for this scene node
 215         // since we won't calculate the bounding box.
 216         setAutomaticCulling(scene::EAC_OFF);
 217
 218         // Create the child scene node
 219         scene::IMesh *dummymesh = g_extrusion_mesh_cache->createCube();
 220         m_meshnode = SceneManager->addMeshSceneNode(dummymesh, this, -1);
 221         m_meshnode->setReadOnlyMaterials(false);
 222         m_meshnode->setVisible(false);
 223         dummymesh->drop(); // m_meshnode grabbed it
 224
 225         m_shadow = RenderingEngine::get_shadow_renderer();
 226
 227         if (m_shadow) {
 228                 // Add mesh to shadow caster
 229                 m_shadow->addNodeToShadowList(m_meshnode);
 230         }
 231 }
 232
 233 WieldMeshSceneNode::~WieldMeshSceneNode()
 234 {
 235         sanity_check(g_extrusion_mesh_cache);
 236
 237         // Remove node from shadow casters. m_shadow might be an invalid pointer!
 238         if (m_shadow)
 239                 m_shadow->removeNodeFromShadowList(m_meshnode);
 240
 241         if (g_extrusion_mesh_cache->drop())
 242                 g_extrusion_mesh_cache = nullptr;
 243 }
 244
 245 void WieldMeshSceneNode::setCube(const ContentFeatures &f,
 246                         v3f wield_scale)
 247 {
 248         scene::IMesh *cubemesh = g_extrusion_mesh_cache->createCube();
 249         scene::SMesh *copy = cloneMesh(cubemesh);
 250         cubemesh->drop();
 251         postProcessNodeMesh(copy, f, false, true, &m_material_type, &m_colors, true);
 252         changeToMesh(copy);
 253         copy->drop();
 254         m_meshnode->setScale(wield_scale * WIELD_SCALE_FACTOR);
 255 }
 256
 257 void WieldMeshSceneNode::setExtruded(const std::string &imagename,
 258         const std::string &overlay_name, v3f wield_scale, ITextureSource *tsrc,
 259         u8 num_frames)
 260 {
 261         video::ITexture *texture = tsrc->getTexture(imagename);
 262         if (!texture) {
 263                 changeToMesh(nullptr);
 264                 return;
 265         }
 266         video::ITexture *overlay_texture =
 267                 overlay_name.empty() ? NULL : tsrc->getTexture(overlay_name);
 268
 269         core::dimension2d<u32> dim = texture->getSize();
 270         // Detect animation texture and pull off top frame instead of using entire thing
 271         if (num_frames > 1) {
 272                 u32 frame_height = dim.Height / num_frames;
 273                 dim = core::dimension2d<u32>(dim.Width, frame_height);
 274         }
 275         scene::IMesh *original = g_extrusion_mesh_cache->create(dim);
 276         scene::SMesh *mesh = cloneMesh(original);
 277         original->drop();
 278         //set texture
 279         mesh->getMeshBuffer(0)->getMaterial().setTexture(0,
 280                 tsrc->getTexture(imagename));
 281         if (overlay_texture) {
 282                 scene::IMeshBuffer *copy = cloneMeshBuffer(mesh->getMeshBuffer(0));
 283                 copy->getMaterial().setTexture(0, overlay_texture);
 284                 mesh->addMeshBuffer(copy);
 285                 copy->drop();
 286         }
 287         changeToMesh(mesh);
 288         mesh->drop();
 289
 290         m_meshnode->setScale(wield_scale * WIELD_SCALE_FACTOR_EXTRUDED);
 291
 292         // Customize materials
 293         for (u32 layer = 0; layer < m_meshnode->getMaterialCount(); layer++) {
 294                 video::SMaterial &material = m_meshnode->getMaterial(layer);
 295                 material.TextureLayer[0].TextureWrapU = video::ETC_CLAMP_TO_EDGE;
 296                 material.TextureLayer[0].TextureWrapV = video::ETC_CLAMP_TO_EDGE;
 297                 material.MaterialType = m_material_type;
 298                 material.MaterialTypeParam = 0.5f;
 299                 material.setFlag(video::EMF_BACK_FACE_CULLING, true);
 300                 // Enable bi/trilinear filtering only for high resolution textures
 301                 if (dim.Width > 32) {
 302                         material.setFlag(video::EMF_BILINEAR_FILTER, m_bilinear_filter);
 303                         material.setFlag(video::EMF_TRILINEAR_FILTER, m_trilinear_filter);
 304                 } else {
 305                         material.setFlag(video::EMF_BILINEAR_FILTER, false);
 306                         material.setFlag(video::EMF_TRILINEAR_FILTER, false);
 307                 }
 308                 material.setFlag(video::EMF_ANISOTROPIC_FILTER, m_anisotropic_filter);
 309                 // mipmaps cause "thin black line" artifacts
 310                 material.setFlag(video::EMF_USE_MIP_MAPS, false);
 311                 if (m_enable_shaders) {
 312                         material.setTexture(2, tsrc->getShaderFlagsTexture(false));
 313                 }
 314         }
 315 }
 316
 317 static scene::SMesh *createSpecialNodeMesh(Client *client, MapNode n,
 318         std::vector<ItemPartColor> *colors, const ContentFeatures &f)
 319 {
 320         MeshMakeData mesh_make_data(client, false);
 321         MeshCollector collector(v3f(0.0f * BS), v3f());
 322         mesh_make_data.setSmoothLighting(false);
 323         MapblockMeshGenerator gen(&mesh_make_data, &collector,
 324                 client->getSceneManager()->getMeshManipulator());
 325
 326         if (n.getParam2()) {
 327                 // keep it
 328         } else if (f.param_type_2 == CPT2_WALLMOUNTED ||
 329                         f.param_type_2 == CPT2_COLORED_WALLMOUNTED) {
 330                 if (f.drawtype == NDT_TORCHLIKE ||
 331                                 f.drawtype == NDT_SIGNLIKE ||
 332                                 f.drawtype == NDT_NODEBOX ||
 333                                 f.drawtype == NDT_MESH) {
 334                         n.setParam2(4);
 335                 }
 336         } else if (f.drawtype == NDT_SIGNLIKE || f.drawtype == NDT_TORCHLIKE) {
 337                 n.setParam2(1);
 338         }
 339         gen.renderSingle(n.getContent(), n.getParam2());
 340
 341         colors->clear();
 342         scene::SMesh *mesh = new scene::SMesh();
 343         for (auto &prebuffers : collector.prebuffers)
 344                 for (PreMeshBuffer &p : prebuffers) {
 345                         if (p.layer.material_flags & MATERIAL_FLAG_ANIMATION) {
 346                                 const FrameSpec &frame = (*p.layer.frames)[0];
 347                                 p.layer.texture = frame.texture;
 348                                 p.layer.normal_texture = frame.normal_texture;
 349                         }
 350                         for (video::S3DVertex &v : p.vertices) {
 351                                 v.Color.setAlpha(255);
 352                         }
 353                         scene::SMeshBuffer *buf = new scene::SMeshBuffer();
 354                         buf->Material.setTexture(0, p.layer.texture);
 355                         p.layer.applyMaterialOptions(buf->Material);
 356                         mesh->addMeshBuffer(buf);
 357                         buf->append(&p.vertices[0], p.vertices.size(),
 358                                         &p.indices[0], p.indices.size());
 359                         buf->drop();
 360                         colors->push_back(
 361                                 ItemPartColor(p.layer.has_color, p.layer.color));
 362                 }
 363         return mesh;
 364 }
 365
 366 void WieldMeshSceneNode::setItem(const ItemStack &item, Client *client, bool check_wield_image)
 367 {
 368         ITextureSource *tsrc = client->getTextureSource();
 369         IItemDefManager *idef = client->getItemDefManager();
 370         IShaderSource *shdrsrc = client->getShaderSource();
 371         const NodeDefManager *ndef = client->getNodeDefManager();
 372         const ItemDefinition &def = item.getDefinition(idef);
 373         const ContentFeatures &f = ndef->get(def.name);
 374         content_t id = ndef->getId(def.name);
 375
 376         scene::SMesh *mesh = nullptr;
 377
 378         if (m_enable_shaders) {
 379                 u32 shader_id = shdrsrc->getShader("object_shader", TILE_MATERIAL_BASIC, NDT_NORMAL);
 380                 m_material_type = shdrsrc->getShaderInfo(shader_id).material;
 381         }
 382
 383         // Color-related
 384         m_colors.clear();
 385         m_base_color = idef->getItemstackColor(item, client);
 386
 387         // If wield_image needs to be checked and is defined, it overrides everything else
 388         if (!def.wield_image.empty() && check_wield_image) {
 389                 setExtruded(def.wield_image, def.wield_overlay, def.wield_scale, tsrc,
 390                         1);
 391                 m_colors.emplace_back();
 392                 // overlay is white, if present
 393                 m_colors.emplace_back(true, video::SColor(0xFFFFFFFF));
 394                 // initialize the color
 395                 if (!m_lighting)
 396                         setColor(video::SColor(0xFFFFFFFF));
 397                 return;
 398         }
 399
 400         // Handle nodes
 401         // See also CItemDefManager::createClientCached()
 402         if (def.type == ITEM_NODE) {
 403                 bool cull_backface = f.needsBackfaceCulling();
 404
 405                 // Select rendering method
 406                 switch (f.drawtype) {
 407                 case NDT_AIRLIKE:
 408                         setExtruded("no_texture_airlike.png", "",
 409                                 v3f(1.0, 1.0, 1.0), tsrc, 1);
 410                         break;
 411                 case NDT_SIGNLIKE:
 412                 case NDT_TORCHLIKE:
 413                 case NDT_RAILLIKE:
 414                 case NDT_PLANTLIKE:
 415                 case NDT_FLOWINGLIQUID: {
 416                         v3f wscale = def.wield_scale;
 417                         if (f.drawtype == NDT_FLOWINGLIQUID)
 418                                 wscale.Z *= 0.1f;
 419                         setExtruded(tsrc->getTextureName(f.tiles[0].layers[0].texture_id),
 420                                 tsrc->getTextureName(f.tiles[0].layers[1].texture_id),
 421                                 wscale, tsrc,
 422                                 f.tiles[0].layers[0].animation_frame_count);
 423                         // Add color
 424                         const TileLayer &l0 = f.tiles[0].layers[0];
 425                         m_colors.emplace_back(l0.has_color, l0.color);
 426                         const TileLayer &l1 = f.tiles[0].layers[1];
 427                         m_colors.emplace_back(l1.has_color, l1.color);
 428                         break;
 429                 }
 430                 case NDT_PLANTLIKE_ROOTED: {
 431                         setExtruded(tsrc->getTextureName(f.special_tiles[0].layers[0].texture_id),
 432                                 "", def.wield_scale, tsrc,
 433                                 f.special_tiles[0].layers[0].animation_frame_count);
 434                         // Add color
 435                         const TileLayer &l0 = f.special_tiles[0].layers[0];
 436                         m_colors.emplace_back(l0.has_color, l0.color);
 437                         break;
 438                 }
 439                 case NDT_NORMAL:
 440                 case NDT_ALLFACES:
 441                 case NDT_LIQUID:
 442                         setCube(f, def.wield_scale);
 443                         break;
 444                 default: {
 445                         // Render non-trivial drawtypes like the actual node
 446                         MapNode n(id);
 447                         n.setParam2(def.place_param2);
 448
 449                         mesh = createSpecialNodeMesh(client, n, &m_colors, f);
 450                         changeToMesh(mesh);
 451                         mesh->drop();
 452                         m_meshnode->setScale(
 453                                 def.wield_scale * WIELD_SCALE_FACTOR
 454                                 / (BS * f.visual_scale));
 455                         break;
 456                 }
 457                 }
 458
 459                 u32 material_count = m_meshnode->getMaterialCount();
 460                 for (u32 i = 0; i < material_count; ++i) {
 461                         video::SMaterial &material = m_meshnode->getMaterial(i);
 462                         material.MaterialType = m_material_type;
 463                         material.MaterialTypeParam = 0.5f;
 464                         material.setFlag(video::EMF_BACK_FACE_CULLING, cull_backface);
 465                         material.setFlag(video::EMF_BILINEAR_FILTER, m_bilinear_filter);
 466                         material.setFlag(video::EMF_TRILINEAR_FILTER, m_trilinear_filter);
 467                 }
 468
 469                 // initialize the color
 470                 if (!m_lighting)
 471                         setColor(video::SColor(0xFFFFFFFF));
 472                 return;
 473         } else {
 474                 if (!def.inventory_image.empty()) {
 475                         setExtruded(def.inventory_image, def.inventory_overlay, def.wield_scale,
 476                                 tsrc, 1);
 477                 } else {
 478                         setExtruded("no_texture.png", "", def.wield_scale, tsrc, 1);
 479                 }
 480
 481                 m_colors.emplace_back();
 482                 // overlay is white, if present
 483                 m_colors.emplace_back(true, video::SColor(0xFFFFFFFF));
 484
 485                 // initialize the color
 486                 if (!m_lighting)
 487                         setColor(video::SColor(0xFFFFFFFF));
 488                 return;
 489         }
 490
 491         // no wield mesh found
 492         changeToMesh(nullptr);
 493 }
 494
 495 void WieldMeshSceneNode::setColor(video::SColor c)
 496 {
 497         assert(!m_lighting);
 498         scene::IMesh *mesh = m_meshnode->getMesh();
 499         if (!mesh)
 500                 return;
 501
 502         u8 red = c.getRed();
 503         u8 green = c.getGreen();
 504         u8 blue = c.getBlue();
 505         u32 mc = mesh->getMeshBufferCount();
 506         for (u32 j = 0; j < mc; j++) {
 507                 video::SColor bc(m_base_color);
 508                 if ((m_colors.size() > j) && (m_colors[j].override_base))
 509                         bc = m_colors[j].color;
 510                 video::SColor buffercolor(255,
 511                         bc.getRed() * red / 255,
 512                         bc.getGreen() * green / 255,
 513                         bc.getBlue() * blue / 255);
 514                 scene::IMeshBuffer *buf = mesh->getMeshBuffer(j);
 515
 516                 if (m_enable_shaders)
 517                         setMeshBufferColor(buf, buffercolor);
 518                 else
 519                         colorizeMeshBuffer(buf, &buffercolor);
 520         }
 521 }
 522
 523 void WieldMeshSceneNode::setNodeLightColor(video::SColor color)
 524 {
 525         if (!m_meshnode)
 526                 return;
 527
 528         if (m_enable_shaders) {
 529                 for (u32 i = 0; i < m_meshnode->getMaterialCount(); ++i) {
 530                         video::SMaterial &material = m_meshnode->getMaterial(i);
 531                         material.EmissiveColor = color;
 532                 }
 533         }
 534         else {
 535                 setColor(color);
 536         }
 537 }
 538
 539 void WieldMeshSceneNode::render()
 540 {
 541         // note: if this method is changed to actually do something,
 542         // you probably should implement OnRegisterSceneNode as well
 543 }
 544
 545 void WieldMeshSceneNode::changeToMesh(scene::IMesh *mesh)
 546 {
 547         if (!mesh) {
 548                 scene::IMesh *dummymesh = g_extrusion_mesh_cache->createCube();
 549                 m_meshnode->setVisible(false);
 550                 m_meshnode->setMesh(dummymesh);
 551                 dummymesh->drop();  // m_meshnode grabbed it
 552         } else {
 553                 m_meshnode->setMesh(mesh);
 554         }
 555
 556         m_meshnode->setMaterialFlag(video::EMF_LIGHTING, m_lighting);
 557         // need to normalize normals when lighting is enabled (because of setScale())
 558         m_meshnode->setMaterialFlag(video::EMF_NORMALIZE_NORMALS, m_lighting);
 559         m_meshnode->setVisible(true);
 560 }
 561
 562 void getItemMesh(Client *client, const ItemStack &item, ItemMesh *result)
 563 {
 564         ITextureSource *tsrc = client->getTextureSource();
 565         IItemDefManager *idef = client->getItemDefManager();
 566         const NodeDefManager *ndef = client->getNodeDefManager();
 567         const ItemDefinition &def = item.getDefinition(idef);
 568         const ContentFeatures &f = ndef->get(def.name);
 569         content_t id = ndef->getId(def.name);
 570
 571         FATAL_ERROR_IF(!g_extrusion_mesh_cache, "Extrusion mesh cache is not yet initialized");
 572
 573         scene::SMesh *mesh = nullptr;
 574
 575         // Shading is on by default
 576         result->needs_shading = true;
 577
 578         bool cull_backface = f.needsBackfaceCulling();
 579
 580         // If inventory_image is defined, it overrides everything else
 581         if (!def.inventory_image.empty()) {
 582                 mesh = getExtrudedMesh(tsrc, def.inventory_image,
 583                         def.inventory_overlay);
 584                 result->buffer_colors.emplace_back();
 585                 // overlay is white, if present
 586                 result->buffer_colors.emplace_back(true, video::SColor(0xFFFFFFFF));
 587                 // Items with inventory images do not need shading
 588                 result->needs_shading = false;
 589         } else if (def.type == ITEM_NODE && f.drawtype == NDT_AIRLIKE) {
 590                 // Fallback image for airlike node
 591                 mesh = getExtrudedMesh(tsrc, "no_texture_airlike.png",
 592                         def.inventory_overlay);
 593                 result->needs_shading = false;
 594         } else if (def.type == ITEM_NODE) {
 595                 switch (f.drawtype) {
 596                 case NDT_NORMAL:
 597                 case NDT_ALLFACES:
 598                 case NDT_LIQUID:
 599                 case NDT_FLOWINGLIQUID: {
 600                         scene::IMesh *cube = g_extrusion_mesh_cache->createCube();
 601                         mesh = cloneMesh(cube);
 602                         cube->drop();
 603                         if (f.drawtype == NDT_FLOWINGLIQUID) {
 604                                 scaleMesh(mesh, v3f(1.2, 0.03, 1.2));
 605                                 translateMesh(mesh, v3f(0, -0.57, 0));
 606                         } else
 607                                 scaleMesh(mesh, v3f(1.2, 1.2, 1.2));
 608                         // add overlays
 609                         postProcessNodeMesh(mesh, f, false, false, nullptr,
 610                                 &result->buffer_colors, true);
 611                         if (f.drawtype == NDT_ALLFACES)
 612                                 scaleMesh(mesh, v3f(f.visual_scale));
 613                         break;
 614                 }
 615                 case NDT_PLANTLIKE: {
 616                         mesh = getExtrudedMesh(tsrc,
 617                                 tsrc->getTextureName(f.tiles[0].layers[0].texture_id),
 618                                 tsrc->getTextureName(f.tiles[0].layers[1].texture_id));
 619                         // Add color
 620                         const TileLayer &l0 = f.tiles[0].layers[0];
 621                         result->buffer_colors.emplace_back(l0.has_color, l0.color);
 622                         const TileLayer &l1 = f.tiles[0].layers[1];
 623                         result->buffer_colors.emplace_back(l1.has_color, l1.color);
 624                         break;
 625                 }
 626                 case NDT_PLANTLIKE_ROOTED: {
 627                         mesh = getExtrudedMesh(tsrc,
 628                                 tsrc->getTextureName(f.special_tiles[0].layers[0].texture_id), "");
 629                         // Add color
 630                         const TileLayer &l0 = f.special_tiles[0].layers[0];
 631                         result->buffer_colors.emplace_back(l0.has_color, l0.color);
 632                         break;
 633                 }
 634                 default: {
 635                         // Render non-trivial drawtypes like the actual node
 636                         MapNode n(id);
 637                         n.setParam2(def.place_param2);
 638
 639                         mesh = createSpecialNodeMesh(client, n, &result->buffer_colors, f);
 640                         scaleMesh(mesh, v3f(0.12, 0.12, 0.12));
 641                         break;
 642                 }
 643                 }
 644
 645                 u32 mc = mesh->getMeshBufferCount();
 646                 for (u32 i = 0; i < mc; ++i) {
 647                         scene::IMeshBuffer *buf = mesh->getMeshBuffer(i);
 648                         video::SMaterial &material = buf->getMaterial();
 649                         material.MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL;
 650                         material.MaterialTypeParam = 0.5f;
 651                         material.setFlag(video::EMF_BILINEAR_FILTER, false);
 652                         material.setFlag(video::EMF_TRILINEAR_FILTER, false);
 653                         material.setFlag(video::EMF_BACK_FACE_CULLING, cull_backface);
 654                         material.setFlag(video::EMF_LIGHTING, false);
 655                 }
 656
 657                 rotateMeshXZby(mesh, -45);
 658                 rotateMeshYZby(mesh, -30);
 659         }
 660         result->mesh = mesh;
 661 }
 662
 663
 664
 665 scene::SMesh *getExtrudedMesh(ITextureSource *tsrc,
 666         const std::string &imagename, const std::string &overlay_name)
 667 {
 668         // check textures
 669         video::ITexture *texture = tsrc->getTextureForMesh(imagename);
 670         if (!texture) {
 671                 return NULL;
 672         }
 673         video::ITexture *overlay_texture =
 674                 (overlay_name.empty()) ? NULL : tsrc->getTexture(overlay_name);
 675
 676         // get mesh
 677         core::dimension2d<u32> dim = texture->getSize();
 678         scene::IMesh *original = g_extrusion_mesh_cache->create(dim);
 679         scene::SMesh *mesh = cloneMesh(original);
 680         original->drop();
 681
 682         //set texture
 683         mesh->getMeshBuffer(0)->getMaterial().setTexture(0,
 684                 tsrc->getTexture(imagename));
 685         if (overlay_texture) {
 686                 scene::IMeshBuffer *copy = cloneMeshBuffer(mesh->getMeshBuffer(0));
 687                 copy->getMaterial().setTexture(0, overlay_texture);
 688                 mesh->addMeshBuffer(copy);
 689                 copy->drop();
 690         }
 691         // Customize materials
 692         for (u32 layer = 0; layer < mesh->getMeshBufferCount(); layer++) {
 693                 video::SMaterial &material = mesh->getMeshBuffer(layer)->getMaterial();
 694                 material.TextureLayer[0].TextureWrapU = video::ETC_CLAMP_TO_EDGE;
 695                 material.TextureLayer[0].TextureWrapV = video::ETC_CLAMP_TO_EDGE;
 696                 material.setFlag(video::EMF_BILINEAR_FILTER, false);
 697                 material.setFlag(video::EMF_TRILINEAR_FILTER, false);
 698                 material.setFlag(video::EMF_BACK_FACE_CULLING, true);
 699                 material.setFlag(video::EMF_LIGHTING, false);
 700                 material.MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL;
 701                 material.MaterialTypeParam = 0.5f;
 702         }
 703         scaleMesh(mesh, v3f(2.0, 2.0, 2.0));
 704
 705         return mesh;
 706 }
 707
 708 void postProcessNodeMesh(scene::SMesh *mesh, const ContentFeatures &f,
 709         bool use_shaders, bool set_material, const video::E_MATERIAL_TYPE *mattype,
 710         std::vector<ItemPartColor> *colors, bool apply_scale)
 711 {
 712         u32 mc = mesh->getMeshBufferCount();
 713         // Allocate colors for existing buffers
 714         colors->clear();
 715         for (u32 i = 0; i < mc; ++i)
 716                 colors->push_back(ItemPartColor());
 717
 718         for (u32 i = 0; i < mc; ++i) {
 719                 const TileSpec *tile = &(f.tiles[i]);
 720                 scene::IMeshBuffer *buf = mesh->getMeshBuffer(i);
 721                 for (int layernum = 0; layernum < MAX_TILE_LAYERS; layernum++) {
 722                         const TileLayer *layer = &tile->layers[layernum];
 723                         if (layer->texture_id == 0)
 724                                 continue;
 725                         if (layernum != 0) {
 726                                 scene::IMeshBuffer *copy = cloneMeshBuffer(buf);
 727                                 copy->getMaterial() = buf->getMaterial();
 728                                 mesh->addMeshBuffer(copy);
 729                                 copy->drop();
 730                                 buf = copy;
 731                                 colors->push_back(
 732                                         ItemPartColor(layer->has_color, layer->color));
 733                         } else {
 734                                 (*colors)[i] = ItemPartColor(layer->has_color, layer->color);
 735                         }
 736                         video::SMaterial &material = buf->getMaterial();
 737                         if (set_material)
 738                                 layer->applyMaterialOptions(material);
 739                         if (mattype) {
 740                                 material.MaterialType = *mattype;
 741                         }
 742                         if (layer->animation_frame_count > 1) {
 743                                 const FrameSpec &animation_frame = (*layer->frames)[0];
 744                                 material.setTexture(0, animation_frame.texture);
 745                         } else {
 746                                 material.setTexture(0, layer->texture);
 747                         }
 748                         if (use_shaders) {
 749                                 if (layer->normal_texture) {
 750                                         if (layer->animation_frame_count > 1) {
 751                                                 const FrameSpec &animation_frame = (*layer->frames)[0];
 752                                                 material.setTexture(1, animation_frame.normal_texture);
 753                                         } else
 754                                                 material.setTexture(1, layer->normal_texture);
 755                                 }
 756                                 material.setTexture(2, layer->flags_texture);
 757                         }
 758                         if (apply_scale && tile->world_aligned) {
 759                                 u32 n = buf->getVertexCount();
 760                                 for (u32 k = 0; k != n; ++k)
 761                                         buf->getTCoords(k) /= layer->scale;
 762                         }
 763                 }
 764         }
 765 }