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