src/mapblock_mesh.h

   1 /*
   2 Minetest-c55
   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 "voxel.h"
  26
  27 class IGameDef;
  28
  29 /*
  30         Mesh making stuff
  31 */
  32
  33 /*
  34         This is used because CMeshBuffer::append() is very slow
  35 */
  36 struct PreMeshBuffer
  37 {
  38         video::SMaterial material;
  39         core::array<u16> indices;
  40         core::array<video::S3DVertex> vertices;
  41 };
  42
  43 class MeshCollector
  44 {
  45 public:
  46         void append(
  47                         video::SMaterial material,
  48                         const video::S3DVertex* const vertices,
  49                         u32 numVertices,
  50                         const u16* const indices,
  51                         u32 numIndices
  52                 )
  53         {
  54                 PreMeshBuffer *p = NULL;
  55                 for(u32 i=0; i<m_prebuffers.size(); i++)
  56                 {
  57                         PreMeshBuffer &pp = m_prebuffers[i];
  58                         if(pp.material != material)
  59                                 continue;
  60
  61                         p = &pp;
  62                         break;
  63                 }
  64
  65                 if(p == NULL)
  66                 {
  67                         PreMeshBuffer pp;
  68                         pp.material = material;
  69                         m_prebuffers.push_back(pp);
  70                         p = &m_prebuffers[m_prebuffers.size()-1];
  71                 }
  72
  73                 u32 vertex_count = p->vertices.size();
  74                 for(u32 i=0; i<numIndices; i++)
  75                 {
  76                         u32 j = indices[i] + vertex_count;
  77                         if(j > 65535)
  78                         {
  79                                 dstream<<"FIXME: Meshbuffer ran out of indices"<<std::endl;
  80                                 // NOTE: Fix is to just add an another MeshBuffer
  81                         }
  82                         p->indices.push_back(j);
  83                 }
  84                 for(u32 i=0; i<numVertices; i++)
  85                 {
  86                         p->vertices.push_back(vertices[i]);
  87                 }
  88         }
  89
  90         void fillMesh(scene::SMesh *mesh)
  91         {
  92                 /*dstream<<"Filling mesh with "<<m_prebuffers.size()
  93                                 <<" meshbuffers"<<std::endl;*/
  94                 for(u32 i=0; i<m_prebuffers.size(); i++)
  95                 {
  96                         PreMeshBuffer &p = m_prebuffers[i];
  97
  98                         /*dstream<<"p.vertices.size()="<<p.vertices.size()
  99                                         <<", p.indices.size()="<<p.indices.size()
 100                                         <<std::endl;*/
 101
 102                         // Create meshbuffer
 103
 104                         // This is a "Standard MeshBuffer",
 105                         // it's a typedeffed CMeshBuffer<video::S3DVertex>
 106                         scene::SMeshBuffer *buf = new scene::SMeshBuffer();
 107                         // Set material
 108                         buf->Material = p.material;
 109                         //((scene::SMeshBuffer*)buf)->Material = p.material;
 110                         // Use VBO
 111                         //buf->setHardwareMappingHint(scene::EHM_STATIC);
 112                         // Add to mesh
 113                         mesh->addMeshBuffer(buf);
 114                         // Mesh grabbed it
 115                         buf->drop();
 116
 117                         buf->append(p.vertices.pointer(), p.vertices.size(),
 118                                         p.indices.pointer(), p.indices.size());
 119                 }
 120         }
 121
 122 private:
 123         core::array<PreMeshBuffer> m_prebuffers;
 124 };
 125
 126 // Helper functions
 127 video::SColor MapBlock_LightColor(u8 alpha, u8 light);
 128
 129 class MapBlock;
 130
 131 struct MeshMakeData
 132 {
 133         u32 m_daynight_ratio;
 134         NodeModMap m_temp_mods;
 135         VoxelManipulator m_vmanip;
 136         v3s16 m_blockpos;
 137
 138         /*
 139                 Copy central data directly from block, and other data from
 140                 parent of block.
 141         */
 142         void fill(u32 daynight_ratio, MapBlock *block);
 143 };
 144
 145 // This is the highest-level function in here
 146 scene::SMesh* makeMapBlockMesh(MeshMakeData *data, IGameDef *gamedef);
 147
 148 #endif
 149