#include "generator.hpp"
#include <limits>
+#include <queue>
#include <glm/gtx/transform.hpp>
-namespace {
-
-blank::Model::Buffer buf;
-
-}
-
namespace blank {
Chunk::Chunk(const BlockTypeRegistry &types)
}
+namespace {
+
+struct SetNode {
+
+ Chunk *chunk;
+ Chunk::Pos pos;
+
+ SetNode(Chunk *chunk, Chunk::Pos pos)
+ : chunk(chunk), pos(pos) { }
+
+ int Get() const { return chunk->GetLight(pos); }
+ void Set(int level) { chunk->SetLight(pos, level); }
+
+ bool HasNext(Block::Face face) {
+ const Block *next = chunk->FindNext(pos, face);
+ return next && !chunk->Type(*next).block_light;
+ }
+ SetNode GetNext(Block::Face face) {
+ Chunk::Pos next_pos(pos + Block::FaceNormal(face));
+ if (Chunk::InBounds(next_pos)) {
+ return SetNode(chunk, next_pos);
+ } else {
+ return SetNode(&chunk->GetNeighbor(face), next_pos - (Block::FaceNormal(face) * Chunk::Extent()));
+ }
+ }
+
+};
+
+struct UnsetNode
+: public SetNode {
+
+ int level;
+
+ UnsetNode(Chunk *chunk, Chunk::Pos pos)
+ : SetNode(chunk, pos), level(Get()) { }
+
+ UnsetNode(const SetNode &set)
+ : SetNode(set), level(Get()) { }
+
+ UnsetNode GetNext(Block::Face face) { return UnsetNode(SetNode::GetNext(face)); }
+
+};
+
+std::queue<SetNode> light_queue;
+std::queue<UnsetNode> dark_queue;
+
+void work_light() {
+ while (!light_queue.empty()) {
+ SetNode node = light_queue.front();
+ light_queue.pop();
+
+ int level = node.Get() - 1;
+ for (int face = 0; face < Block::FACE_COUNT; ++face) {
+ if (node.HasNext(Block::Face(face))) {
+ SetNode other = node.GetNext(Block::Face(face));
+ if (other.Get() < level) {
+ other.Set(level);
+ light_queue.emplace(other);
+ }
+ }
+ }
+ }
+}
+
+void work_dark() {
+ while (!dark_queue.empty()) {
+ UnsetNode node = dark_queue.front();
+ dark_queue.pop();
+
+ for (int face = 0; face < Block::FACE_COUNT; ++face) {
+ if (node.HasNext(Block::Face(face))) {
+ UnsetNode other = node.GetNext(Block::Face(face));
+ // TODO: if there a light source here with the same level this will err
+ if (other.Get() != 0 && other.Get() < node.level) {
+ other.Set(0);
+ dark_queue.emplace(other);
+ } else {
+ light_queue.emplace(other);
+ }
+ }
+ }
+ }
+}
+
+}
+
+void Chunk::SetBlock(int index, const Block &block) {
+ const BlockType &old_type = Type(blocks[index]);
+ const BlockType &new_type = Type(block);
+
+ blocks[index] = block;
+
+ if (&old_type == &new_type) return;
+
+ if (new_type.luminosity > old_type.luminosity) {
+ // light added
+ SetLight(index, new_type.luminosity);
+ light_queue.emplace(this, ToPos(index));
+ work_light();
+ } else if (new_type.luminosity < old_type.luminosity) {
+ // light removed
+ dark_queue.emplace(this, ToPos(index));
+ SetLight(index, 0);
+ work_dark();
+ SetLight(index, new_type.luminosity);
+ light_queue.emplace(this, ToPos(index));
+ work_light();
+ } else if (new_type.block_light && !old_type.block_light) {
+ // obstacle added
+ dark_queue.emplace(this, ToPos(index));
+ SetLight(index, 0);
+ work_dark();
+ work_light();
+ } else if (!new_type.block_light && old_type.block_light) {
+ // obstacle removed
+ int level = 0;
+ for (int face = 0; face < Block::FACE_COUNT; ++face) {
+ Pos next_pos(ToPos(index) + Block::FaceNormal(Block::Face(face)));
+ int next_level = 0;
+ if (InBounds(next_pos)) {
+ next_level = GetLight(next_pos);
+ } else {
+ if (HasNeighbor(Block::Face(face))) {
+ next_pos -= (Block::FaceNormal(Block::Face(face)) * Chunk::Extent());
+ next_level = GetNeighbor(Block::Face(face)).GetLight(next_pos);
+ }
+ }
+ if (level < next_level) {
+ level = next_level;
+ }
+ }
+ if (level > 1) {
+ SetLight(index, level - 1);
+ light_queue.emplace(this, ToPos(index));
+ work_light();
+ }
+ }
+}
+
+const Block *Chunk::FindNext(const Pos &pos, Block::Face face) const {
+ Pos next_pos(pos + Block::FaceNormal(face));
+ if (InBounds(next_pos)) {
+ return &BlockAt(pos + Block::FaceNormal(face));
+ } else if (HasNeighbor(face)) {
+ return &GetNeighbor(face).BlockAt(next_pos - (Block::FaceNormal(face) * Extent()));
+ } else {
+ return nullptr;
+ }
+}
+
+
+void Chunk::SetLight(int index, int level) {
+ light[index] = level;
+}
+
+int Chunk::GetLight(int index) const {
+ return light[index];
+}
+
+
+bool Chunk::IsSurface(const Pos &pos) const {
+ const Block &block = BlockAt(pos);
+ if (!Type(block).visible) {
+ return false;
+ }
+ for (int face = 0; face < Block::FACE_COUNT; ++face) {
+ const Block *next = FindNext(pos, Block::Face(face));
+ if (!next || !Type(*next).visible) {
+ return true;
+ }
+ }
+ return false;
+}
+
+
void Chunk::Allocate() {
- blocks.resize(Size());
+ blocks.resize(Size(), Block(0));
+ light.resize(Size(), 0);
}
}
+namespace {
+
+Model::Buffer buf;
+
+}
+
void Chunk::CheckUpdate() {
if (dirty) {
Update();
}
-ChunkLoader::ChunkLoader(const BlockTypeRegistry ®, const Generator &gen)
+ChunkLoader::ChunkLoader(const Config &config, const BlockTypeRegistry ®, const Generator &gen)
: base(0, 0, 0)
, reg(reg)
, gen(gen)
, loaded()
, to_generate()
, to_free()
-, load_dist(4)
-, unload_dist(5) {
+, load_dist(config.load_dist)
+, unload_dist(config.unload_dist) {
}
}
}
// add missing new chunks
+ GenerateSurrounding(base);
+}
+
+void ChunkLoader::GenerateSurrounding(const Chunk::Pos &pos) {
const Chunk::Pos offset(load_dist, load_dist, load_dist);
- Generate(base - offset, base + offset);
+ Generate(pos - offset, pos + offset);
}
void ChunkLoader::Update() {
projects / blank.git / blobdiff