modules/RenderEngine/src/chunk_mesh.lua

   1 local ChunkMesh = Dragonblocks.create_class()
   2 table.assign(ChunkMesh, RenderEngine.Mesh)
   3
   4 function ChunkMesh:create_faces(blocks)
   5         self.vertices = {}
   6         self.textures = {}
   7         self.vertex_blob_size = 6
   8         local face_orientations = {
   9                 glm.vec3( 0,  0, -1),
  10                 glm.vec3( 0,  0,  1),
  11                 glm.vec3(-1,  0,  0),
  12                 glm.vec3( 1,  0,  0),
  13                 glm.vec3( 0, -1,  0),
  14                 glm.vec3( 0,  1,  0),
  15         }
  16         local bc = 0
  17         for _, block in pairs(blocks) do
  18                 for i, dir in ipairs(face_orientations) do
  19                         local pos = block.pos
  20                         local dir_pos_hash = WorldSystem.Chunk.get_pos_hash(pos + dir)
  21                         if not dir_pos_hash or not blocks[dir_pos_hash] then
  22                                 table.insert(self.textures, block.def.texture)
  23                                 self:add_face(block.pos - glm.vec3(7.5, 7.5, 7.5), i)
  24                         end
  25                 end
  26                 bc = bc + 1
  27                 if bc == 64 then
  28                         bc = 0
  29                         coroutine.yield()
  30                 end
  31         end
  32         self:apply_vertices(self.vertices)
  33 end
  34
  35 function ChunkMesh:add_face(pos, facenr)
  36         local cube_vertices = RenderEngine.cube_vertices
  37         local pos_modifier = {pos.x, pos.y, pos.z}
  38         local offset = (facenr - 1) * 6
  39         for vertex_index = offset, offset + 5 do
  40                 for attribute_index = 1, 5 do
  41                         local k = vertex_index * 5 + attribute_index
  42                         local v = cube_vertices[k]
  43                         if attribute_index <= 3 then
  44                                 v = v + pos_modifier[attribute_index]
  45                         end
  46                         table.insert(self.vertices, v)
  47                 end
  48         end
  49 end
  50
  51 return ChunkMesh