src/mapblock_mesh.h

   1 /*
   2 Minetest-m13
   3 Copyright (C) 2010-2011 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 General Public License as published by
   7 the Free Software Foundation; either version 2 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 General Public License for more details.
  14
  15 You should have received a copy of the GNU 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 #ifndef MAPBLOCK_MESH_HEADER
  21 #define MAPBLOCK_MESH_HEADER
  22
  23 #include "common_irrlicht.h"
  24 #include "mapblock_nodemod.h"
  25 #include "tile.h"
  26 #include "voxel.h"
  27
  28 class IGameDef;
  29
  30 /*
  31         Mesh making stuff
  32 */
  33
  34 /*
  35         This is used because CMeshBuffer::append() is very slow
  36 */
  37 struct PreMeshBuffer
  38 {
  39         video::SMaterial material;
  40         core::array<u16> indices;
  41         core::array<video::S3DVertex> vertices;
  42 };
  43
  44 class MeshCollector
  45 {
  46 public:
  47         void append(
  48                         video::SMaterial material,
  49                         const video::S3DVertex* const vertices,
  50                         u32 numVertices,
  51                         const u16* const indices,
  52                         u32 numIndices
  53                 )
  54         {
  55                 PreMeshBuffer *p = NULL;
  56                 for(u32 i=0; i<m_prebuffers.size(); i++)
  57                 {
  58                         PreMeshBuffer &pp = m_prebuffers[i];
  59                         if(pp.material != material)
  60                                 continue;
  61
  62                         p = &pp;
  63                         break;
  64                 }
  65
  66                 if(p == NULL)
  67                 {
  68                         PreMeshBuffer pp;
  69                         pp.material = material;
  70                         m_prebuffers.push_back(pp);
  71                         p = &m_prebuffers[m_prebuffers.size()-1];
  72                 }
  73
  74                 u32 vertex_count = p->vertices.size();
  75                 for(u32 i=0; i<numIndices; i++)
  76                 {
  77                         u32 j = indices[i] + vertex_count;
  78                         if(j > 65535)
  79                         {
  80                                 dstream<<"FIXME: Meshbuffer ran out of indices"<<std::endl;
  81                                 // NOTE: Fix is to just add an another MeshBuffer
  82                         }
  83                         p->indices.push_back(j);
  84                 }
  85                 for(u32 i=0; i<numVertices; i++)
  86                 {
  87                         p->vertices.push_back(vertices[i]);
  88                 }
  89         }
  90
  91         void fillMesh(scene::SMesh *mesh)
  92         {
  93                 /*dstream<<"Filling mesh with "<<m_prebuffers.size()
  94                                 <<" meshbuffers"<<std::endl;*/
  95                 for(u32 i=0; i<m_prebuffers.size(); i++)
  96                 {
  97                         PreMeshBuffer &p = m_prebuffers[i];
  98
  99                         /*dstream<<"p.vertices.size()="<<p.vertices.size()
 100                                         <<", p.indices.size()="<<p.indices.size()
 101                                         <<std::endl;*/
 102
 103                         // Create meshbuffer
 104
 105                         // This is a "Standard MeshBuffer",
 106                         // it's a typedeffed CMeshBuffer<video::S3DVertex>
 107                         scene::SMeshBuffer *buf = new scene::SMeshBuffer();
 108                         // Set material
 109                         buf->Material = p.material;
 110                         //((scene::SMeshBuffer*)buf)->Material = p.material;
 111                         // Use VBO
 112                         //buf->setHardwareMappingHint(scene::EHM_STATIC);
 113                         // Add to mesh
 114                         mesh->addMeshBuffer(buf);
 115                         // Mesh grabbed it
 116                         buf->drop();
 117
 118                         buf->append(p.vertices.pointer(), p.vertices.size(),
 119                                         p.indices.pointer(), p.indices.size());
 120                 }
 121         }
 122
 123 private:
 124         core::array<PreMeshBuffer> m_prebuffers;
 125 };
 126
 127 // Helper functions
 128 video::SColor MapBlock_LightColor(u8 alpha, u8 light);
 129 TileSpec getNodeTile(MapNode mn, v3s16 p, v3s16 face_dir,
 130                 NodeModMap *temp_mods, ITextureSource *tsrc, INodeDefManager *ndef);
 131
 132 class MapBlock;
 133
 134 struct MeshMakeData
 135 {
 136         u32 m_daynight_ratio;
 137         NodeModMap m_temp_mods;
 138         VoxelManipulator m_vmanip;
 139         v3s16 m_blockpos;
 140
 141         /*
 142                 Copy central data directly from block, and other data from
 143                 parent of block.
 144         */
 145         void fill(u32 daynight_ratio, MapBlock *block);
 146
 147         /*
 148                 Set up with only a single node at (1,1,1)
 149         */
 150         void fillSingleNode(u32 daynight_ratio, MapNode *node);
 151 };
 152
 153 // This is the highest-level function in here
 154 scene::SMesh* makeMapBlockMesh(MeshMakeData *data, IGameDef *gamedef);
 155
 156 #endif
 157