Core/Maps: Implemented getting area id from gameobject spawns

Yes, you can now spawn LK platform anywhere and it will treat you as inside Icecrown Citadel

(cherry picked from commit 42f9deb21ec68e169f7ed1c8cf14092f144b22da)

2 files changed, 74 insertions, 2 deletions

diff --git a/src/common/Collision/Models/GameObjectModel.cpp b/src/common/Collision/Models/GameObjectModel.cpp
index 54b48714c90..2c95187fbb2 100644
--- a/src/common/Collision/Models/GameObjectModel.cpp
+++ b/src/common/Collision/Models/GameObjectModel.cpp
@@ -146,6 +146,7 @@ bool GameObjectModel::initialize(std::unique_ptr<GameObjectModelOwnerBase> model
 #endif
 
     owner = std::move(modelOwner);
+    isWmo = it->second.isWmo;
     return true;
 }
 
@@ -183,6 +184,69 @@ bool GameObjectModel::intersectRay(const G3D::Ray& ray, float& MaxDist, bool Sto
     return hit;
 }
 
+void GameObjectModel::intersectPoint(G3D::Vector3 const& point, VMAP::AreaInfo& info, uint32 ph_mask) const
+{
+    if (!(phasemask & ph_mask) || !owner->IsSpawned() || !isMapObject())
+        return;
+
+    if (!iBound.contains(point))
+        return;
+
+    // child bounds are defined in object space:
+    Vector3 pModel = iInvRot * (point - iPos) * iInvScale;
+    Vector3 zDirModel = iInvRot * Vector3(0.f, 0.f, -1.f);
+    float zDist;
+    if (iModel->IntersectPoint(pModel, zDirModel, zDist, info))
+    {
+        Vector3 modelGround = pModel + zDist * zDirModel;
+        float world_Z = ((modelGround * iInvRot) * iScale + iPos).z;
+        if (info.ground_Z < world_Z)
+            info.ground_Z = world_Z;
+    }
+}
+
+bool GameObjectModel::GetLocationInfo(G3D::Vector3 const& point, VMAP::LocationInfo& info, uint32 ph_mask) const
+{
+    if (!(phasemask & ph_mask) || !owner->IsSpawned() || !isMapObject())
+        return false;
+
+    if (!iBound.contains(point))
+        return false;
+
+    // child bounds are defined in object space:
+    Vector3 pModel = iInvRot * (point - iPos) * iInvScale;
+    Vector3 zDirModel = iInvRot * Vector3(0.f, 0.f, -1.f);
+    float zDist;
+    if (iModel->GetLocationInfo(pModel, zDirModel, zDist, info))
+    {
+        Vector3 modelGround = pModel + zDist * zDirModel;
+        float world_Z = ((modelGround * iInvRot) * iScale + iPos).z;
+        if (info.ground_Z < world_Z)
+        {
+            info.ground_Z = world_Z;
+            return true;
+        }
+    }
+
+    return false;
+}
+
+bool GameObjectModel::GetLiquidLevel(G3D::Vector3 const& point, VMAP::LocationInfo& info, float& liqHeight) const
+{
+    // child bounds are defined in object space:
+    Vector3 pModel = iInvRot * (point - iPos) * iInvScale;
+    //Vector3 zDirModel = iInvRot * Vector3(0.f, 0.f, -1.f);
+    float zDist;
+    if (info.hitModel->GetLiquidLevel(pModel, zDist))
+    {
+        // calculate world height (zDist in model coords):
+        // assume WMO not tilted (wouldn't make much sense anyway)
+        liqHeight = zDist * iScale + iPos.z;
+        return true;
+    }
+    return false;
+}
+
 bool GameObjectModel::UpdatePosition()
 {
     if (!iModel)
diff --git a/src/common/Collision/Models/GameObjectModel.h b/src/common/Collision/Models/GameObjectModel.h
index 99ffef0ee98..78f17b75391 100644
--- a/src/common/Collision/Models/GameObjectModel.h
+++ b/src/common/Collision/Models/GameObjectModel.h
@@ -29,6 +29,8 @@
 namespace VMAP
 {
     class WorldModel;
+    struct AreaInfo;
+    struct LocationInfo;
     enum class ModelIgnoreFlags : uint32;
 }
 
@@ -38,6 +40,8 @@ struct GameObjectDisplayInfoEntry;
 class TC_COMMON_API GameObjectModelOwnerBase
 {
 public:
+    virtual ~GameObjectModelOwnerBase() = default;
+
     virtual bool IsSpawned() const = 0;
     virtual uint32 GetDisplayId() const = 0;
     virtual uint32 GetPhaseMask() const = 0;
@@ -45,12 +49,11 @@ public:
     virtual float GetOrientation() const = 0;
     virtual float GetScale() const = 0;
     virtual void DebugVisualizeCorner(G3D::Vector3 const& /*corner*/) const = 0;
-    virtual ~GameObjectModelOwnerBase() { }
 };
 
 class TC_COMMON_API GameObjectModel /*, public Intersectable*/
 {
-    GameObjectModel() : phasemask(0), iInvScale(0), iScale(0), iModel(nullptr) { }
+    GameObjectModel() : phasemask(0), iInvScale(0), iScale(0), iModel(nullptr), isWmo(false) { }
 public:
     std::string name;
 
@@ -65,8 +68,12 @@ public:
     void enable(uint32 ph_mask) { phasemask = ph_mask;}
 
     bool isEnabled() const {return phasemask != 0;}
+    bool isMapObject() const { return isWmo; }
 
     bool intersectRay(const G3D::Ray& Ray, float& MaxDist, bool StopAtFirstHit, uint32 ph_mask, VMAP::ModelIgnoreFlags ignoreFlags) const;
+    void intersectPoint(G3D::Vector3 const& point, VMAP::AreaInfo& info, uint32 ph_mask) const;
+    bool GetLocationInfo(G3D::Vector3 const& point, VMAP::LocationInfo& info, uint32 ph_mask) const;
+    bool GetLiquidLevel(G3D::Vector3 const& point, VMAP::LocationInfo& info, float& liqHeight) const;
 
     static GameObjectModel* Create(std::unique_ptr<GameObjectModelOwnerBase> modelOwner, std::string const& dataPath);
 
@@ -83,6 +90,7 @@ private:
     float iScale;
     VMAP::WorldModel* iModel;
     std::unique_ptr<GameObjectModelOwnerBase> owner;
+    bool isWmo;
 };
 
 TC_COMMON_API void LoadGameObjectModelList(std::string const& dataPath);