src/block.hpp

   1 #ifndef BLANK_BLOCK_HPP_
   2 #define BLANK_BLOCK_HPP_
   3
   4 #include "geometry.hpp"
   5 #include "model.hpp"
   6 #include "shape.hpp"
   7
   8 #include <vector>
   9 #include <glm/glm.hpp>
  10
  11
  12 namespace blank {
  13
  14 /// single 1x1x1 cube
  15 struct Block {
  16
  17         using Type = unsigned short;
  18         using Pos = glm::vec3;
  19
  20         enum Face {
  21                 FACE_UP,
  22                 FACE_DOWN,
  23                 FACE_RIGHT,
  24                 FACE_LEFT,
  25                 FACE_FRONT,
  26                 FACE_BACK,
  27                 FACE_COUNT,
  28         };
  29         enum Turn {
  30                 TURN_NONE,
  31                 TURN_LEFT,
  32                 TURN_AROUND,
  33                 TURN_RIGHT,
  34                 TURN_COUNT,
  35         };
  36
  37         Type type;
  38         unsigned char orient;
  39
  40         constexpr explicit Block(Type type = 0, Face face = FACE_UP, Turn turn = TURN_NONE)
  41         : type(type), orient(face * TURN_COUNT + turn) { }
  42
  43         const glm::mat4 &Transform() const;
  44
  45         Face GetFace() const { return Face(orient / 4); }
  46         void SetFace(Face face) { orient = face * TURN_COUNT + GetTurn(); }
  47         Turn GetTurn() const { return Turn(orient % 4); }
  48         void SetTurn(Turn turn) { orient = GetFace() * TURN_COUNT + turn; }
  49
  50 };
  51
  52
  53 /// attributes of a type of block
  54 struct BlockType {
  55
  56         const Shape *shape;
  57         glm::vec3 color;
  58         glm::vec3 outline_color;
  59
  60         Block::Type id;
  61
  62         bool visible;
  63
  64         struct Faces {
  65                 bool face[Block::FACE_COUNT];
  66                 Faces &operator =(const Faces &other) {
  67                         for (int i = 0; i < Block::FACE_COUNT; ++i) {
  68                                 face[i] = other.face[i];
  69                         }
  70                         return *this;
  71                 }
  72                 bool operator [](Block::Face f) const {
  73                         return face[f];
  74                 }
  75         } fill;
  76
  77         explicit BlockType(
  78                 bool v = false,
  79                 const glm::vec3 &color = { 1, 1, 1 },
  80                 const Shape *shape = &DEFAULT_SHAPE
  81         );
  82
  83         static const NullShape DEFAULT_SHAPE;
  84
  85         bool FaceFilled(const Block &, Block::Face) const;
  86
  87         void FillModel(
  88                 Model::Buffer &m,
  89                 const glm::mat4 &transform = glm::mat4(1.0f),
  90                 Model::Index idx_offset = 0
  91         ) const;
  92         void FillOutlineModel(
  93                 OutlineModel &m,
  94                 const glm::vec3 &pos_offset = { 0, 0, 0 },
  95                 OutlineModel::Index idx_offset = 0
  96         ) const;
  97
  98 };
  99
 100
 101 class BlockTypeRegistry {
 102
 103 public:
 104         BlockTypeRegistry();
 105
 106 public:
 107         Block::Type Add(const BlockType &);
 108
 109         size_t Size() const { return types.size(); }
 110
 111         BlockType *operator [](Block::Type id) { return &types[id]; }
 112         const BlockType *Get(Block::Type id) const { return &types[id]; }
 113
 114 private:
 115         std::vector<BlockType> types;
 116
 117 };
 118
 119 }
 120
 121 #endif