Implement removeTree game command (#1083)

src/OpenLoco/GameCommands/GameCommands.cpp

@@ -68,7 +68,7 @@ namespace OpenLoco::GameCommands
         { GameCommand::changeCompanyColourScheme,    changeCompanyColour,       0x0043483D, false },
         { GameCommand::pauseGame,                    togglePause,               0x00431E32, false },
         { GameCommand::loadSaveQuitGame,             loadSaveQuit,              0x0043BFCB, false },
-        { GameCommand::removeTree,                   nullptr,                   0x004BB392, true  },
+        { GameCommand::removeTree,                   removeTree,                0x004BB392, true  },
         { GameCommand::createTree,                   nullptr,                   0x004BB138, true  },
         { GameCommand::changeLandMaterial,           nullptr,                   0x00468EDD, true  },
         { GameCommand::raiseLand,                    nullptr,                   0x00463702, true  },

src/OpenLoco/GameCommands/GameCommands.h

@@ -1238,6 +1238,9 @@ namespace OpenLoco::GameCommands
     // Defined in GameCommands/LoadSaveQuit.cpp
     void loadSaveQuit(registers& regs);
 
+    // Defined in GameCommands/RemoveTree.cpp
+    void removeTree(registers& regs);
+
     // Defined in GameCommands/RenameIndustry.cpp
     void renameIndustry(registers& regs);
 

src/OpenLoco/GameCommands/RemoveTree.cpp

@@ -0,0 +1,59 @@
+#include "../Economy/Economy.h"
+#include "../Economy/Expenditures.h"
+#include "../Map/TileManager.h"
+#include "../Objects/ObjectManager.h"
+#include "../Objects/TreeObject.h"
+#include "../OpenLoco.h"
+#include "../S5/S5.h"
+#include "GameCommands.h"
+
+using namespace OpenLoco::Interop;
+
+namespace OpenLoco::GameCommands
+{
+    // 0x004BB392
+    static uint32_t removeTree(const Map::Pos3& pos, const uint8_t type, const uint8_t elementType, const uint8_t flags)
+    {
+        GameCommands::setExpenditureType(ExpenditureType::Construction);
+
+        auto tileHeight = Map::TileManager::getHeight(pos);
+        GameCommands::setPosition(Map::Pos3(pos.x + Map::tile_size / 2, pos.y + Map::tile_size / 2, tileHeight.landHeight));
+
+        auto tile = Map::TileManager::get(pos);
+        for (auto& element : tile)
+        {
+            // TODO: refactor! Figure out what info it actually needs.
+            if (element.rawData()[0] != elementType)
+                continue;
+
+            if (element.baseZ() * 4 != pos.z)
+                continue;
+
+            auto treeElement = element.asTree();
+            if (treeElement == nullptr)
+                continue;
+
+            if (treeElement->treeObjectId() != type)
+                continue;
+
+            auto treeObj = ObjectManager::get<TreeObject>(treeElement->treeObjectId());
+            currency32_t removalCost = Economy::getInflationAdjustedCost(treeObj->clear_cost_factor, treeObj->cost_index, 12);
+
+            if (flags & Flags::apply)
+                Map::TileManager::removeElement(element);
+
+            auto& options = S5::getOptions();
+            options.madeAnyChanges = 1;
+
+            return removalCost;
+        }
+
+        return FAILURE;
+    }
+
+    void removeTree(registers& regs)
+    {
+        TreeRemovalArgs args(regs);
+        regs.ebx = removeTree(args.pos, args.type, args.elementType, regs.bl);
+    }
+}

src/OpenLoco/Map/TileManager.cpp

@@ -86,6 +86,13 @@ namespace OpenLoco::Map::TileManager
         TileManager::updateTilePointers();
     }
 
+    void removeElement(TileElement& element)
+    {
+        registers regs;
+        regs.esi = X86Pointer(&element);
+        call(0x004BB432, regs);
+    }
+
     TileElement** getElementIndex()
     {
         return _tiles.get();

src/OpenLoco/Map/TileManager.h

@@ -17,6 +17,7 @@ namespace OpenLoco::Map::TileManager
     Tile get(Pos2 pos);
     Tile get(coord_t x, coord_t y);
     void setElements(stdx::span<TileElement> elements);
+    void removeElement(TileElement& element);
     TileHeight getHeight(const Pos2& pos);
     void updateTilePointers();
     void reorganise();

src/OpenLoco/openloco.vcxproj

@@ -38,6 +38,7 @@
     <ClCompile Include="GameCommands\ChangeCompanyColour.cpp" />
     <ClCompile Include="GameCommands\GameCommands.cpp" />
     <ClCompile Include="GameCommands\LoadSaveQuit.cpp" />
+    <ClCompile Include="GameCommands\RemoveTree.cpp" />
     <ClCompile Include="GameCommands\RenameIndustry.cpp" />
     <ClCompile Include="GameCommands\RenameStation.cpp" />
     <ClCompile Include="GameCommands\RenameTown.cpp" />