1 files changed, 155 insertions, 0 deletions
diff --git a/source/game/StarTerrainDatabase.cpp b/source/game/StarTerrainDatabase.cpp
new file mode 100644
index 0000000..22f9365
--- /dev/null
+++ b/source/game/StarTerrainDatabase.cpp
@@ -0,0 +1,155 @@
+#include "StarTerrainDatabase.hpp"
+#include "StarRidgeBlocksSelector.hpp"
+#include "StarKarstCave.hpp"
+#include "StarWormCave.hpp"
+#include "StarConstantSelector.hpp"
+#include "StarMaxSelector.hpp"
+#include "StarMinMaxSelector.hpp"
+#include "StarFlatSurfaceSelector.hpp"
+#include "StarDisplacementSelector.hpp"
+#include "StarRotateSelector.hpp"
+#include "StarMixSelector.hpp"
+#include "StarPerlinSelector.hpp"
+#include "StarCacheSelector.hpp"
+#include "StarIslandSurfaceSelector.hpp"
+#include "StarAssets.hpp"
+#include "StarRoot.hpp"
+#include "StarRandom.hpp"
+#include "StarJsonExtra.hpp"
+
+namespace Star {
+
+TerrainSelectorParameters::TerrainSelectorParameters() {
+  seed = Random::randu64();
+  worldWidth = 0;
+  commonality = 1.0f;
+}
+
+TerrainSelectorParameters::TerrainSelectorParameters(Json const& v) {
+  worldWidth = v.getUInt("worldWidth");
+  baseHeight = v.getFloat("baseHeight");
+  seed = v.getUInt("seed");
+  commonality = v.getFloat("commonality");
+}
+
+Json TerrainSelectorParameters::toJson() const {
+  return JsonObject{
+      {"worldWidth", worldWidth}, {"baseHeight", baseHeight}, {"seed", seed}, {"commonality", commonality}};
+}
+
+TerrainSelectorParameters TerrainSelectorParameters::withSeed(uint64_t seed) const {
+  TerrainSelectorParameters copy = *this;
+  copy.seed = seed;
+  return copy;
+}
+
+TerrainSelectorParameters TerrainSelectorParameters::withCommonality(float commonality) const {
+  TerrainSelectorParameters copy = *this;
+  copy.commonality = commonality;
+  return copy;
+}
+
+TerrainSelector::TerrainSelector(String type, Json config, TerrainSelectorParameters parameters)
+  : type(move(type)), config(move(config)), parameters(move(parameters)) {}
+
+TerrainSelector::~TerrainSelector() {}
+
+TerrainDatabase::TerrainDatabase() {
+  auto assets = Root::singleton().assets();
+
+  // 'type' here is the extension of the file, and determines the selector type
+  auto scanFiles = [this, assets](String const& type) {
+    auto files = assets->scanExtension(type);
+    assets->queueJsons(files);
+    for (auto path : files) {
+      auto parameters = assets->json(path);
+      auto name = parameters.getString("name");
+      if (m_terrainSelectors.contains(name))
+        throw TerrainException(strf("Duplicate terrain generator name '%s'", name));
+      m_terrainSelectors[name] = {type, parameters};
+    }
+  };
+
+  scanFiles(KarstCaveSelector::Name);
+  scanFiles(WormCaveSelector::Name);
+  scanFiles(RidgeBlocksSelector::Name);
+
+  auto files = assets->scanExtension("terrain");
+  assets->queueJsons(files);
+  for (auto path : files) {
+    auto parameters = assets->json(path);
+    auto name = parameters.getString("name");
+    auto type = parameters.getString("type");
+    if (m_terrainSelectors.contains(name))
+      throw TerrainException(strf("Duplicate composed terrain generator name '%s'", name));
+    m_terrainSelectors[name] = {type, parameters};
+  }
+}
+
+TerrainDatabase::Config TerrainDatabase::selectorConfig(String const& name) const {
+  if (auto config = m_terrainSelectors.maybe(name))
+    return config.take();
+  else
+    throw TerrainException(strf("No such terrain selector '%s'", name));
+}
+
+TerrainSelectorConstPtr TerrainDatabase::createNamedSelector(String const& name, TerrainSelectorParameters const& parameters) const {
+  auto config = selectorConfig(name);
+
+  return createSelectorType(config.type, config.parameters, parameters);
+}
+
+TerrainSelectorConstPtr TerrainDatabase::constantSelector(float value) {
+  return createSelectorType(ConstantSelector::Name, JsonObject{{"value", value}}, TerrainSelectorParameters());
+}
+
+Json TerrainDatabase::storeSelector(TerrainSelectorConstPtr const& selector) const {
+  if (!selector)
+    return {};
+
+  return JsonObject{
+    {"type", selector->type},
+    {"config", selector->config},
+    {"parameters", selector->parameters.toJson()}
+  };
+}
+
+TerrainSelectorConstPtr TerrainDatabase::loadSelector(Json const& store) const {
+  if (store.isNull())
+    return {};
+  return createSelectorType(store.getString("type"), store.get("config"),
+      TerrainSelectorParameters(store.get("parameters")));
+}
+
+TerrainSelectorConstPtr TerrainDatabase::createSelectorType(String const& type, Json const& config, TerrainSelectorParameters const& parameters) const {
+  if (type == WormCaveSelector::Name)
+    return make_shared<WormCaveSelector>(config, parameters);
+  else if (type == KarstCaveSelector::Name)
+    return make_shared<KarstCaveSelector>(config, parameters);
+  else if (type == ConstantSelector::Name)
+    return make_shared<ConstantSelector>(config, parameters);
+  else if (type == MaxSelector::Name)
+    return make_shared<MaxSelector>(config, parameters, this);
+  else if (type == MinMaxSelector::Name)
+    return make_shared<MinMaxSelector>(config, parameters, this);
+  else if (type == IslandSurfaceSelector::Name)
+    return make_shared<IslandSurfaceSelector>(config, parameters);
+  else if (type == FlatSurfaceSelector::Name)
+    return make_shared<FlatSurfaceSelector>(config, parameters);
+  else if (type == DisplacementSelector::Name)
+    return make_shared<DisplacementSelector>(config, parameters, this);
+  else if (type == RotateSelector::Name)
+    return make_shared<RotateSelector>(config, parameters, this);
+  else if (type == MixSelector::Name)
+    return make_shared<MixSelector>(config, parameters, this);
+  else if (type == PerlinSelector::Name)
+    return make_shared<PerlinSelector>(config, parameters);
+  else if (type == RidgeBlocksSelector::Name)
+    return make_shared<RidgeBlocksSelector>(config, parameters);
+  else if (type == CacheSelector::Name)
+    return make_shared<CacheSelector>(config, parameters, this);
+  else
+    throw TerrainException(strf("Unknown terrain selector type '%s'", type));
+}
+
+}