Implements NumberOfDocks and DockingOffset for BuildingTypes.

src/extensions/building/buildingext.cpp

@@ -29,6 +29,7 @@
 #include "building.h"
 #include "buildingtype.h"
 #include "buildingtypeext.h"
+#include "tibsun_inline.h"
 #include "house.h"
 #include "housetype.h"
 #include "wwcrc.h"
@@ -172,6 +173,7 @@ void BuildingClassExtension::Compute_CRC(WWCRCEngine &crc) const
     crc(ProduceCashTimer());
 }
 
+
 /**
  *  #issue-26
  * 
@@ -286,3 +288,55 @@ void BuildingClassExtension::Produce_Cash_AI()
     }
 
 }
+
+
+/**
+ *  Fetches the coordinate to use for docking.
+ *  
+ *  @author: CCHyper
+ */
+Coordinate BuildingClassExtension::Docking_Coord() const
+{
+    ASSERT(ThisPtr != nullptr);
+    //EXT_DEBUG_TRACE("BuildingClassExtension::Docking_Coord - Name: %s (0x%08X)\n", ThisPtr->Name(), (uintptr_t)(ThisPtr));
+
+    if (ThisPtr->Class->IsWeeder) {
+        Cell cell = ThisPtr->Get_Cell();
+        cell.X += 2;
+        cell.Y += 1;
+        Coordinate coord = Cell_Coord(cell, true);
+        coord.Z = ThisPtr->Get_Coord().Z;
+        return coord;
+    }
+
+    if (ThisPtr->Class->IsRefinery) {
+        Coordinate coord = ThisPtr->Center_Coord();
+        coord.X += CELL_LEPTON_W/2;
+        return coord;
+    }
+
+    /**
+     *  #issue-786
+     * 
+     *  Implements DockingOffset for BuildingTypes (currently limited to Helipads).
+     *  
+     *  @author: CCHyper
+     */
+    BuildingTypeClassExtension *buildingtypeext = BuildingTypeClassExtensions.find(ThisPtr->Class);
+
+    if (buildingtypeext && buildingtypeext->NumberOfDocks > 0) {
+
+        TPoint3D<int> docking_offset_0 = buildingtypeext->DockingOffsets[0];
+
+        if (ThisPtr->Class->IsHelipad) {
+            Coordinate coord = ThisPtr->Center_Coord();
+            coord.X += docking_offset_0.X;
+            coord.Y += docking_offset_0.Y;
+            coord.Z += docking_offset_0.Z;
+            return coord;
+        }
+
+    }
+
+    return ThisPtr->Docking_Coord();
+}

src/extensions/building/buildingext.h

@@ -53,6 +53,7 @@ class BuildingClassExtension final : public Extension<BuildingClass>
         virtual void Compute_CRC(WWCRCEngine &crc) const override;
 
         void Produce_Cash_AI();
+        Coordinate Docking_Coord() const;
 
     public:
         /**

src/extensions/building/buildingext_hooks.cpp

@@ -55,6 +55,36 @@
 #include "hooker_macros.h"
 
 
+/**
+ *  A fake class for implementing new member functions which allow
+ *  access to the "this" pointer of the intended class.
+ * 
+ *  @note: This must not contain a constructor or destructor!
+ *  @note: All functions must be prefixed with "_" to prevent accidental virtualization.
+ */
+class BuildingClassExt final : public BuildingClass
+{
+    public:
+        Coordinate _Docking_Coord() const;
+};
+
+
+/**
+ *  Reimplementation of BuildingClass::Docking_Coord.
+ * 
+ *  @author: CCHyper
+ */
+Coordinate BuildingClassExt::_Docking_Coord() const
+{
+    BuildingClassExtension *buildingext = BuildingClassExtensions.find(this);
+    if (buildingext) {
+        return buildingext->Docking_Coord();
+    } else {
+        return BuildingClass::Docking_Coord();
+    }
+}
+
+
 /**
  *  #issue-26
  * 
@@ -493,4 +523,6 @@ void BuildingClassExtension_Hooks()
     Patch_Jump(0x00429A96, &_BuildingClass_AI_ProduceCash_Patch);
     Patch_Jump(0x0042F67D, &_BuildingClass_Captured_ProduceCash_Patch);
     Patch_Jump(0x0042E179, &_BuildingClass_Grand_Opening_ProduceCash_Patch);
+
+    Change_Virtual_Address(0x006CC3A0, Get_Func_Address(&BuildingClassExt::_Docking_Coord));
 }

src/extensions/buildingtype/buildingtypeext.cpp

@@ -54,7 +54,9 @@ BuildingTypeClassExtension::BuildingTypeClassExtension(BuildingTypeClass *this_p
     ProduceCashBudget(0),
     IsStartupCashOneTime(false),
     IsResetBudgetOnCapture(false),
-    IsEligibleForAllyBuilding(false)
+    IsEligibleForAllyBuilding(false),
+    NumberOfDocks(0),
+    DockingOffsets()
 {
     ASSERT(ThisPtr != nullptr);
     //EXT_DEBUG_TRACE("BuildingTypeClassExtension constructor - Name: %s (0x%08X)\n", ThisPtr->Name(), (uintptr_t)(ThisPtr));
@@ -167,6 +169,8 @@ void BuildingTypeClassExtension::Compute_CRC(WWCRCEngine &crc) const
     //EXT_DEBUG_TRACE("BuildingTypeClassExtension::Compute_CRC - Name: %s (0x%08X)\n", ThisPtr->Name(), (uintptr_t)(ThisPtr));
 
     crc(IsEligibleForAllyBuilding);
+    crc(NumberOfDocks);
+    crc(DockingOffsets.Count());
 }
 
 
@@ -181,12 +185,26 @@ bool BuildingTypeClassExtension::Read_INI(CCINIClass &ini)
     //EXT_DEBUG_TRACE("BuildingTypeClassExtension::Read_INI - Name: %s (0x%08X)\n", ThisPtr->Name(), (uintptr_t)(ThisPtr));
     EXT_DEBUG_WARNING("BuildingTypeClassExtension::Read_INI - Name: %s (0x%08X)\n", ThisPtr->Name(), (uintptr_t)(ThisPtr));
 
+    char buffer[1024];
+
     const char *ini_name = ThisPtr->Name();
+    const char *graphic_name = ThisPtr->Graphic_Name();
 
     if (!ini.Is_Present(ini_name)) {
         return false;
     }
 
+    //if (!ArtINI.Is_Present(graphic_name)) {
+    //    return false;
+    //}
+
+    /**
+     *  The following structures have at least one docking location.
+     */
+    if (ThisPtr->IsHelipad) {
+        NumberOfDocks = 1;
+    }
+
     GateUpSound = ini.Get_VocType(ini_name, "GateUpSound", GateUpSound);
     GateDownSound = ini.Get_VocType(ini_name, "GateDownSound", GateDownSound);
 
@@ -199,6 +217,14 @@ bool BuildingTypeClassExtension::Read_INI(CCINIClass &ini)
 
     IsEligibleForAllyBuilding = ini.Get_Bool(ini_name, "EligibleForAllyBuilding",
                                                     ThisPtr->IsConstructionYard ? true : IsEligibleForAllyBuilding);
+
+    NumberOfDocks = ini.Get_Int(ini_name, "NumberOfDocks", NumberOfDocks);
+
+    for (int i = 0; i < NumberOfDocks; ++i) {
+        std::snprintf(buffer, sizeof(buffer), "DockingOffset%d", i);
+        TPoint3D<int> offset = ArtINI.Get_Point(graphic_name, buffer, TPoint3D<int>(0,0,0));
+        DockingOffsets.Add(offset);
+    }
 
     return true;
 }

src/extensions/buildingtype/buildingtypeext.h

@@ -29,6 +29,7 @@
 
 #include "extension.h"
 #include "container.h"
+#include "tpoint.h"
 
 
 class BuildingTypeClass;
@@ -96,6 +97,16 @@ class BuildingTypeClassExtension final : public Extension<BuildingTypeClass>
          *  Is this building eligible for proximity checks by players who are its owner's allies?
          */
         bool IsEligibleForAllyBuilding;
+
+        /**
+         *  The number of available docking positions this building has.
+         */
+        unsigned NumberOfDocks;
+
+        /**
+         *  The offset(s) from the center of the building for each docking position.
+         */
+        DynamicVectorClass<TPoint3D<int>> DockingOffsets;
 };