Reconstruct readable C++ and organize cohesive source subsystems

Administrative source import: native x86 compilation passed for 423 authored units. Source placement and submission states are migrated separately; this commit does not imply peer acceptance.

Previous head: 35d2a8cb36
Payload SHA256: 592f016d2730c5593bb653aa054c1e5f76a6df72c8f5a09e66f74876e2e33dee

Source/Contents/World/WorldModelLoading.cpp

@@ -0,0 +1,110 @@
+#include "Contents/Models/ModelActor.h"
+#include "Contents/Ground/TerrainHeight.h"
+#include "Contents/World/WorldModelLoading.h"
+#include "Contents/World/WorldModelPlacement.h"
+#include "Contents/World/WorldSpatialInitialization.h"
+#include "Resource/ResourceMgr.h"
+#include "Resource/World/WorldResource.h"
+
+#include <algorithm>
+#include <atomic>
+#include <cmath>
+#include <cstdint>
+
+namespace {
+  bool Before(const DeferredWorldModel& left, const DeferredWorldModel& right) {
+    if (left.distance < right.distance) {
+      return true;
+    }
+
+    if (right.distance < left.distance) {
+      return false;
+    }
+
+    if (left.distance == right.distance) {
+      return reinterpret_cast<std::uintptr_t>(left.placement) < reinterpret_cast<std::uintptr_t>(right.placement);
+    }
+
+    return false;
+  }
+}
+
+void WorldModelLoading::Schedule(const WorldModelRecord& placement, const TerrainHeight& terrain, int column, int row, float* center) {
+  terrain.CellCenter(column, row, center[0], center[2]);
+  const float y = placement.position[1] - center[1];
+  const float x = placement.position[0] - center[0];
+  const float z = placement.position[2] - center[2];
+  const float squared = (y * y + x * x) + z * z;
+  const float distance = std::sqrt(squared);
+
+  if (distance > 200.0f) {
+    this->deferred.push_back({distance, &placement});
+    return;
+  }
+
+  auto* resource = static_cast<C3dModelRes*>(this->resources.Load(placement.model));
+
+  if (resource) {
+    if (C3dActor* model = CreatePlacedWorldModel(placement, *resource, this->movies, this->lighting)) {
+      this->models.push_back(model);
+    }
+  }
+}
+
+DWORD WINAPI WorldModelLoading::ThreadEntry(void* context) {
+  static_cast<WorldModelLoading*>(context)->Run();
+  return 0;
+}
+
+void WorldModelLoading::Start() {
+  this->thread = CreateThread(nullptr, 0, &WorldModelLoading::ThreadEntry, this, 0, nullptr);
+
+  if (!this->thread) {
+    this->Run();
+    this->Finish();
+  }
+}
+
+// OFFSET: 0x00AC8BF0
+// FUNCTION: fn_17680
+void WorldModelLoading::Run() {
+  SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_HIGHEST);
+  std::sort(this->deferred.begin(), this->deferred.end(), Before);
+
+  for (const DeferredWorldModel& entry : this->deferred) {
+    const WorldModelRecord& placement = *entry.placement;
+    auto* resource = static_cast<C3dModelRes*>(this->resources.Load(placement.model));
+
+    if (!resource) {
+      continue;
+    }
+
+    C3dActor* model = CreatePlacedWorldModel(placement, *resource, this->movies, this->lighting);
+
+    if (!model) {
+      continue;
+    }
+
+    this->models.push_back(model);
+    std::atomic_ref<int>(this->pending).fetch_add(1, std::memory_order_seq_cst);
+    Sleep(0);
+  }
+}
+
+void WorldModelLoading::Publish(WorldSpatialTree& root) {
+  C3dActor* const* data = this->models.data();
+  PublishWorldModels(root, data, this->published, this->pending);
+}
+
+// OFFSET: 0x00ACB6C0
+// FUNCTION: fn_17705
+void WorldModelLoading::Finish() {
+  if (this->thread) {
+    WaitForSingleObject(this->thread, INFINITE);
+    CloseHandle(this->thread);
+    this->thread = nullptr;
+  }
+
+  this->deferred.clear();
+  std::atomic_ref<int>(this->pending).store(0, std::memory_order_release);
+}