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 "main.h"
  21 #include "settings.h"
  22 #include "wieldmesh.h"
  23 #include "inventory.h"
  24 #include "gamedef.h"
  25 #include "itemdef.h"
  26 #include "nodedef.h"
  27 #include "mesh.h"
  28 #include "mapblock_mesh.h"
  29 #include "tile.h"
  30 #include "log.h"
  31 #include "util/numeric.h"
  32 #include <map>
  33 #include <IMeshManipulator.h>
  34
  35 #define WIELD_SCALE_FACTOR 30.0
  36 #define WIELD_SCALE_FACTOR_EXTRUDED 40.0
  37
  38 #define MIN_EXTRUSION_MESH_RESOLUTION 32   // not 16: causes too many "holes"
  39 #define MAX_EXTRUSION_MESH_RESOLUTION 512
  40
  41 static scene::IMesh* createExtrusionMesh(int resolution_x, int resolution_y)
  42 {
  43         const f32 r = 0.5;
  44
  45         scene::IMeshBuffer *buf = new scene::SMeshBuffer();
  46         video::SColor c(255,255,255,255);
  47         v3f scale(1.0, 1.0, 0.1);
  48
  49         // Front and back
  50         {
  51                 video::S3DVertex vertices[8] = {
  52                         // z-
  53                         video::S3DVertex(-r,+r,-r, 0,0,-1, c, 0,0),
  54                         video::S3DVertex(+r,+r,-r, 0,0,-1, c, 1,0),
  55                         video::S3DVertex(+r,-r,-r, 0,0,-1, c, 1,1),
  56                         video::S3DVertex(-r,-r,-r, 0,0,-1, c, 0,1),
  57                         // z+
  58                         video::S3DVertex(-r,+r,+r, 0,0,+1, c, 0,0),
  59                         video::S3DVertex(-r,-r,+r, 0,0,+1, c, 0,1),
  60                         video::S3DVertex(+r,-r,+r, 0,0,+1, c, 1,1),
  61                         video::S3DVertex(+r,+r,+r, 0,0,+1, c, 1,0),
  62                 };
  63                 u16 indices[12] = {0,1,2,2,3,0,4,5,6,6,7,4};
  64                 buf->append(vertices, 8, indices, 12);
  65         }
  66
  67         f32 pixelsize_x = 1 / (f32) resolution_x;
  68         f32 pixelsize_y = 1 / (f32) resolution_y;
  69
  70         for (int i = 0; i < resolution_x; ++i) {
  71                 f32 pixelpos_x = i * pixelsize_x - 0.5;
  72                 f32 x0 = pixelpos_x;
  73                 f32 x1 = pixelpos_x + pixelsize_x;
  74                 f32 tex0 = (i + 0.1) * pixelsize_x;
  75                 f32 tex1 = (i + 0.9) * pixelsize_x;
  76                 video::S3DVertex vertices[8] = {
  77                         // x-
  78                         video::S3DVertex(x0,-r,-r, -1,0,0, c, tex0,1),
  79                         video::S3DVertex(x0,-r,+r, -1,0,0, c, tex1,1),
  80                         video::S3DVertex(x0,+r,+r, -1,0,0, c, tex1,0),
  81                         video::S3DVertex(x0,+r,-r, -1,0,0, c, tex0,0),
  82                         // x+
  83                         video::S3DVertex(x1,-r,-r, +1,0,0, c, tex0,1),
  84                         video::S3DVertex(x1,+r,-r, +1,0,0, c, tex0,0),
  85                         video::S3DVertex(x1,+r,+r, +1,0,0, c, tex1,0),
  86                         video::S3DVertex(x1,-r,+r, +1,0,0, c, tex1,1),
  87                 };
  88                 u16 indices[12] = {0,1,2,2,3,0,4,5,6,6,7,4};
  89                 buf->append(vertices, 8, indices, 12);
  90         }
  91         for (int i = 0; i < resolution_y; ++i) {
  92                 f32 pixelpos_y = i * pixelsize_y - 0.5;
  93                 f32 y0 = -pixelpos_y - pixelsize_y;
  94                 f32 y1 = -pixelpos_y;
  95                 f32 tex0 = (i + 0.1) * pixelsize_y;
  96                 f32 tex1 = (i + 0.9) * pixelsize_y;
  97                 video::S3DVertex vertices[8] = {
  98                         // y-
  99                         video::S3DVertex(-r,y0,-r, 0,-1,0, c, 0,tex0),
 100                         video::S3DVertex(+r,y0,-r, 0,-1,0, c, 1,tex0),
 101                         video::S3DVertex(+r,y0,+r, 0,-1,0, c, 1,tex1),
 102                         video::S3DVertex(-r,y0,+r, 0,-1,0, c, 0,tex1),
 103                         // y+
 104                         video::S3DVertex(-r,y1,-r, 0,+1,0, c, 0,tex0),
 105                         video::S3DVertex(-r,y1,+r, 0,+1,0, c, 0,tex1),
 106                         video::S3DVertex(+r,y1,+r, 0,+1,0, c, 1,tex1),
 107                         video::S3DVertex(+r,y1,-r, 0,+1,0, c, 1,tex0),
 108                 };
 109                 u16 indices[12] = {0,1,2,2,3,0,4,5,6,6,7,4};
 110                 buf->append(vertices, 8, indices, 12);
 111         }
 112
 113         // Create mesh object
 114         scene::SMesh *mesh = new scene::SMesh();
 115         mesh->addMeshBuffer(buf);
 116         buf->drop();
 117         scaleMesh(mesh, scale);  // also recalculates bounding box
 118         return mesh;
 119 }
 120
 121 /*
 122         Caches extrusion meshes so that only one of them per resolution
 123         is needed. Also caches one cube (for convenience).
 124
 125         E.g. there is a single extrusion mesh that is used for all
 126         16x16 px images, another for all 256x256 px images, and so on.
 127
 128         WARNING: Not thread safe. This should not be a problem since
 129         rendering related classes (such as WieldMeshSceneNode) will be
 130         used from the rendering thread only.
 131 */
 132 class ExtrusionMeshCache: public IReferenceCounted
 133 {
 134 public:
 135         // Constructor
 136         ExtrusionMeshCache()
 137         {
 138                 for (int resolution = MIN_EXTRUSION_MESH_RESOLUTION;
 139                                 resolution <= MAX_EXTRUSION_MESH_RESOLUTION;
 140                                 resolution *= 2) {
 141                         m_extrusion_meshes[resolution] =
 142                                 createExtrusionMesh(resolution, resolution);
 143                 }
 144                 m_cube = createCubeMesh(v3f(1.0, 1.0, 1.0));
 145         }
 146         // Destructor
 147         virtual ~ExtrusionMeshCache()
 148         {
 149                 for (std::map<int, scene::IMesh*>::iterator
 150                                 it = m_extrusion_meshes.begin();
 151                                 it != m_extrusion_meshes.end(); ++it) {
 152                         it->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                         assert(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(
 197                 scene::ISceneNode *parent,
 198                 scene::ISceneManager *mgr,
 199                 s32 id,
 200                 bool lighting
 201 ):
 202         scene::ISceneNode(parent, mgr, id),
 203         m_meshnode(NULL),
 204         m_material_type(video::EMT_TRANSPARENT_ALPHA_CHANNEL_REF),
 205         m_lighting(lighting),
 206         m_bounding_box(0.0, 0.0, 0.0, 0.0, 0.0, 0.0)
 207 {
 208         m_enable_shaders = g_settings->getBool("enable_shaders");
 209         m_anisotropic_filter = g_settings->getBool("anisotropic_filter");
 210         m_bilinear_filter = g_settings->getBool("bilinear_filter");
 211         m_trilinear_filter = g_settings->getBool("trilinear_filter");
 212
 213         // If this is the first wield mesh scene node, create a cache
 214         // for extrusion meshes (and a cube mesh), otherwise reuse it
 215         if (g_extrusion_mesh_cache == NULL)
 216                 g_extrusion_mesh_cache = new ExtrusionMeshCache();
 217         else
 218                 g_extrusion_mesh_cache->grab();
 219
 220         // Disable bounding box culling for this scene node
 221         // since we won't calculate the bounding box.
 222         setAutomaticCulling(scene::EAC_OFF);
 223
 224         // Create the child scene node
 225         scene::IMesh *dummymesh = g_extrusion_mesh_cache->createCube();
 226         m_meshnode = SceneManager->addMeshSceneNode(dummymesh, this, -1);
 227         m_meshnode->setReadOnlyMaterials(false);
 228         m_meshnode->setVisible(false);
 229         dummymesh->drop(); // m_meshnode grabbed it
 230 }
 231
 232 WieldMeshSceneNode::~WieldMeshSceneNode()
 233 {
 234         assert(g_extrusion_mesh_cache);
 235         if (g_extrusion_mesh_cache->drop())
 236                 g_extrusion_mesh_cache = NULL;
 237 }
 238
 239 void WieldMeshSceneNode::setCube(const TileSpec tiles[6],
 240                         v3f wield_scale, ITextureSource *tsrc)
 241 {
 242         scene::IMesh *cubemesh = g_extrusion_mesh_cache->createCube();
 243         changeToMesh(cubemesh);
 244         cubemesh->drop();
 245
 246         m_meshnode->setScale(wield_scale * WIELD_SCALE_FACTOR);
 247
 248         // Customize materials
 249         for (u32 i = 0; i < m_meshnode->getMaterialCount(); ++i) {
 250                 assert(i < 6);
 251                 video::SMaterial &material = m_meshnode->getMaterial(i);
 252                 if (tiles[i].animation_frame_count == 1) {
 253                         material.setTexture(0, tiles[i].texture);
 254                 } else {
 255                         FrameSpec animation_frame = tiles[i].frames.find(0)->second;
 256                         material.setTexture(0, animation_frame.texture);
 257                 }
 258                 tiles[i].applyMaterialOptions(material);
 259         }
 260 }
 261
 262 void WieldMeshSceneNode::setExtruded(const std::string &imagename,
 263                 v3f wield_scale, ITextureSource *tsrc)
 264 {
 265         video::ITexture *texture = tsrc->getTexture(imagename);
 266         if (!texture) {
 267                 changeToMesh(NULL);
 268                 return;
 269         }
 270         core::dimension2d<u32> dim = texture->getSize();
 271         scene::IMesh *mesh = g_extrusion_mesh_cache->create(dim);
 272         changeToMesh(mesh);
 273         mesh->drop();
 274
 275         m_meshnode->setScale(wield_scale * WIELD_SCALE_FACTOR_EXTRUDED);
 276
 277         // Customize material
 278         video::SMaterial &material = m_meshnode->getMaterial(0);
 279         material.setTexture(0, texture);
 280         material.MaterialType = m_material_type;
 281         material.setFlag(video::EMF_BACK_FACE_CULLING, true);
 282         // Enable filtering only for high resolution texures
 283         if (dim.Width > 32) {
 284                 material.setFlag(video::EMF_ANISOTROPIC_FILTER, m_anisotropic_filter);
 285                 material.setFlag(video::EMF_BILINEAR_FILTER, m_bilinear_filter);
 286                 material.setFlag(video::EMF_TRILINEAR_FILTER, m_trilinear_filter);
 287         } else {
 288                 material.setFlag(video::EMF_ANISOTROPIC_FILTER, false);
 289                 material.setFlag(video::EMF_BILINEAR_FILTER, false);
 290                 material.setFlag(video::EMF_TRILINEAR_FILTER, false);
 291         }
 292         // mipmaps cause "thin black line" artifacts
 293         material.setFlag(video::EMF_USE_MIP_MAPS, false);
 294         if (m_enable_shaders)
 295                 material.setTexture(2, tsrc->getTexture("disable_img.png"));
 296 }
 297
 298 void WieldMeshSceneNode::setItem(const ItemStack &item, IGameDef *gamedef)
 299 {
 300         ITextureSource *tsrc = gamedef->getTextureSource();
 301         IItemDefManager *idef = gamedef->getItemDefManager();
 302         IShaderSource *shdrsrc = gamedef->getShaderSource();
 303         INodeDefManager *ndef = gamedef->getNodeDefManager();
 304         const ItemDefinition &def = item.getDefinition(idef);
 305         const ContentFeatures &f = ndef->get(def.name);
 306         content_t id = ndef->getId(def.name);
 307
 308         if (m_enable_shaders) {
 309                 u32 shader_id = shdrsrc->getShader("nodes_shader", TILE_MATERIAL_BASIC, NDT_NORMAL);
 310                 m_material_type = shdrsrc->getShaderInfo(shader_id).material;
 311         }
 312
 313         // If wield_image is defined, it overrides everything else
 314         if (def.wield_image != "") {
 315                 setExtruded(def.wield_image, def.wield_scale, tsrc);
 316                 return;
 317         }
 318         // Handle nodes
 319         // See also CItemDefManager::createClientCached()
 320         else if (def.type == ITEM_NODE) {
 321                 if (f.mesh_ptr[0]) {
 322                         // e.g. mesh nodes and nodeboxes
 323                         changeToMesh(f.mesh_ptr[0]);
 324                         // mesh_ptr[0] is pre-scaled by BS * f->visual_scale
 325                         m_meshnode->setScale(
 326                                         def.wield_scale * WIELD_SCALE_FACTOR
 327                                         / (BS * f.visual_scale));
 328                 } else if (f.drawtype == NDT_AIRLIKE) {
 329                         changeToMesh(NULL);
 330                 } else if (f.drawtype == NDT_PLANTLIKE) {
 331                         setExtruded(tsrc->getTextureName(f.tiles[0].texture_id), def.wield_scale, tsrc);
 332                 } else if (f.drawtype == NDT_NORMAL || f.drawtype == NDT_ALLFACES) {
 333                         setCube(f.tiles, def.wield_scale, tsrc);
 334                 } else {
 335                         MeshMakeData mesh_make_data(gamedef);
 336                         MapNode mesh_make_node(id, 255, 0);
 337                         mesh_make_data.fillSingleNode(&mesh_make_node);
 338                         MapBlockMesh mapblock_mesh(&mesh_make_data, v3s16(0, 0, 0));
 339                         changeToMesh(mapblock_mesh.getMesh());
 340                         translateMesh(m_meshnode->getMesh(), v3f(-BS, -BS, -BS));
 341                         m_meshnode->setScale(
 342                                         def.wield_scale * WIELD_SCALE_FACTOR
 343                                         / (BS * f.visual_scale));
 344                 }
 345                 for (u32 i = 0; i < m_meshnode->getMaterialCount(); ++i) {
 346                         assert(i < 6);
 347                         video::SMaterial &material = m_meshnode->getMaterial(i);
 348                         material.setFlag(video::EMF_BACK_FACE_CULLING, true);
 349                         material.setFlag(video::EMF_BILINEAR_FILTER, m_bilinear_filter);
 350                         material.setFlag(video::EMF_TRILINEAR_FILTER, m_trilinear_filter);
 351                         bool animated = (f.tiles[i].animation_frame_count > 1);
 352                         if (animated) {
 353                                 FrameSpec animation_frame = f.tiles[i].frames.find(0)->second;
 354                                 material.setTexture(0, animation_frame.texture);
 355                         } else {
 356                                 material.setTexture(0, f.tiles[i].texture);
 357                         }
 358                         material.MaterialType = m_material_type;
 359                         if (m_enable_shaders) {
 360                                 if (f.tiles[i].normal_texture) {
 361                                         if (animated) {
 362                                                 FrameSpec animation_frame = f.tiles[i].frames.find(0)->second;
 363                                                 material.setTexture(1, animation_frame.normal_texture);
 364                                         } else {
 365                                                 material.setTexture(1, f.tiles[i].normal_texture);
 366                                         }
 367                                         material.setTexture(2, tsrc->getTexture("enable_img.png"));
 368                                 } else {
 369                                         material.setTexture(2, tsrc->getTexture("disable_img.png"));
 370                                 }
 371                         }
 372                 }
 373                 return;
 374         }
 375         else if (def.inventory_image != "") {
 376                 setExtruded(def.inventory_image, def.wield_scale, tsrc);
 377                 return;
 378         }
 379
 380         // no wield mesh found
 381         changeToMesh(NULL);
 382 }
 383
 384 void WieldMeshSceneNode::setColor(video::SColor color)
 385 {
 386         assert(!m_lighting);
 387         setMeshColor(m_meshnode->getMesh(), color);
 388 }
 389
 390 void WieldMeshSceneNode::render()
 391 {
 392         // note: if this method is changed to actually do something,
 393         // you probably should implement OnRegisterSceneNode as well
 394 }
 395
 396 void WieldMeshSceneNode::changeToMesh(scene::IMesh *mesh)
 397 {
 398         if (mesh == NULL) {
 399                 scene::IMesh *dummymesh = g_extrusion_mesh_cache->createCube();
 400                 m_meshnode->setVisible(false);
 401                 m_meshnode->setMesh(dummymesh);
 402                 dummymesh->drop();  // m_meshnode grabbed it
 403         }
 404
 405         if (m_lighting) {
 406                 m_meshnode->setMesh(mesh);
 407         } else {
 408                 /*
 409                         Lighting is disabled, this means the caller can (and probably will)
 410                         call setColor later. We therefore need to clone the mesh so that
 411                         setColor will only modify this scene node's mesh, not others'.
 412                 */
 413                 scene::IMeshManipulator *meshmanip = SceneManager->getMeshManipulator();
 414                 scene::IMesh *new_mesh = meshmanip->createMeshCopy(mesh);
 415                 m_meshnode->setMesh(new_mesh);
 416                 new_mesh->drop();  // m_meshnode grabbed it
 417         }
 418
 419         m_meshnode->setMaterialFlag(video::EMF_LIGHTING, m_lighting);
 420         // need to normalize normals when lighting is enabled (because of setScale())
 421         m_meshnode->setMaterialFlag(video::EMF_NORMALIZE_NORMALS, m_lighting);
 422         m_meshnode->setVisible(true);
 423 }