don't add obstructed blocks to meshes

[blank.git] / src / chunk.hpp

diff --git a/src/chunk.hpp b/src/chunk.hpp
index 9d2f319c08a2a7a4913a1c7b63be0032ecb1f997..e27cf5ed09d5b3e6a9b018e5bd1b4ca927450a47 100644 (file)
--- a/src/chunk.hpp
+++ b/src/chunk.hpp
@@ -5,6 +5,7 @@
 #include "geometry.hpp"
 #include "model.hpp"
 
+#include <list>
 #include <vector>
 #include <glm/glm.hpp>
 
@@ -15,7 +16,10 @@ namespace blank {
 class Chunk {
 
 public:
-       Chunk();
+       using Pos = glm::tvec3<int>;
+
+public:
+       explicit Chunk(const BlockTypeRegistry &);
 
        Chunk(Chunk &&);
        Chunk &operator =(Chunk &&);
@@ -23,9 +27,11 @@ public:
        static constexpr int Width() { return 16; }
        static constexpr int Height() { return 16; }
        static constexpr int Depth() { return 16; }
-       static glm::vec3 Extent() { return glm::vec3(Width(), Height(), Depth()); }
+       static Pos Extent() { return { Width(), Height(), Depth() }; }
        static constexpr int Size() { return Width() * Height() * Depth(); }
 
+       static AABB Bounds() { return AABB{ { 0, 0, 0 }, Extent() }; }
+
        static constexpr bool InBounds(const glm::vec3 &pos) {
                return
                        pos.x >= 0 && pos.x < Width() &&
@@ -38,20 +44,34 @@ public:
        static constexpr bool InBounds(int idx) {
                return idx >= 0 && idx < Size();
        }
-       static glm::vec3 ToCoords(int idx) {
-               return glm::vec3(
-                       0.5f + idx % Width(),
-                       0.5f + (idx / Width()) % Height(),
-                       0.5f + idx / (Width() * Height())
+       static Block::Pos ToCoords(int idx) {
+               return Block::Pos(
+                       0.5f + (idx % Width()),
+                       0.5f + ((idx / Width()) % Height()),
+                       0.5f + (idx / (Width() * Height()))
                );
        }
 
+       static constexpr bool IsBorder(int idx) {
+               return
+                       idx < Width() * Height() ||
+                       (idx / Width()) % Height() == 0 ||
+                       (idx / Width()) % Height() == Height() - 1 ||
+                       (idx / (Width() * Height())) == Depth() - 1;
+       }
+
+       // check if block at given index is completely enclosed (and therefore invisible)
+       bool Obstructed(int idx) const;
+
+       void Allocate();
        void Invalidate() { dirty = true; }
 
        Block &BlockAt(int index) { return blocks[index]; }
        const Block &BlockAt(int index) const { return blocks[index]; }
-       Block &BlockAt(const glm::vec3 &pos) { return BlockAt(ToIndex(pos)); }
-       const Block &BlockAt(const glm::vec3 &pos) const { return BlockAt(ToIndex(pos)); }
+       Block &BlockAt(const Block::Pos &pos) { return BlockAt(ToIndex(pos)); }
+       const Block &BlockAt(const Block::Pos &pos) const { return BlockAt(ToIndex(pos)); }
+
+       const BlockType &Type(const Block &b) const { return *types->Get(b.type); }
 
        bool Intersection(
                const Ray &,
@@ -60,25 +80,60 @@ public:
                float *dist = nullptr,
                glm::vec3 *normal = nullptr) const;
 
-       void Position(const glm::vec3 &);
-       const glm::vec3 &Position() const { return position; }
-       const glm::mat4 &Transform() const { return transform; }
+       void Position(const Pos &);
+       const Pos &Position() const { return position; }
+       glm::mat4 Transform(const Pos &offset) const;
 
+       void CheckUpdate();
        void Draw();
 
 private:
-       int VertexCount() const;
        void Update();
 
 private:
+       const BlockTypeRegistry *types;
        std::vector<Block> blocks;
        Model model;
-       glm::vec3 position;
-       glm::mat4 transform;
+       Pos position;
        bool dirty;
 
 };
 
+
+class Generator;
+
+class ChunkLoader {
+
+public:
+       ChunkLoader(const BlockTypeRegistry &, const Generator &);
+
+       void Generate(const Chunk::Pos &from, const Chunk::Pos &to);
+
+       std::list<Chunk> &Loaded() { return loaded; }
+
+       Chunk *Loaded(const Chunk::Pos &);
+       bool Queued(const Chunk::Pos &);
+       bool Known(const Chunk::Pos &);
+       Chunk &ForceLoad(const Chunk::Pos &);
+
+       void Rebase(const Chunk::Pos &);
+       void Update();
+
+private:
+       Chunk::Pos base;
+
+       const BlockTypeRegistry &reg;
+       const Generator &gen;
+
+       std::list<Chunk> loaded;
+       std::list<Chunk::Pos> to_generate;
+       std::list<Chunk> to_free;
+
+       int load_dist;
+       int unload_dist;
+
+};
+
 }
 
 #endif