Core/Movement: Implement SpellEffectExtraData curve modifiers

4 files changed, 36 insertions, 4 deletions

diff --git a/src/server/game/Movement/Spline/MoveSpline.cpp b/src/server/game/Movement/Spline/MoveSpline.cpp
index d4e3cbff60d..a9912745435 100644
--- a/src/server/game/Movement/Spline/MoveSpline.cpp
+++ b/src/server/game/Movement/Spline/MoveSpline.cpp
@@ -19,6 +19,7 @@
 #include "MoveSpline.h"
 #include "Log.h"
 #include "Creature.h"
+#include "DB2Stores.h"
 
 #include <sstream>
 
@@ -28,10 +29,16 @@ Location MoveSpline::ComputePosition() const
 {
     ASSERT(Initialized());
 
-    float u = 1.f;
+    float u = 1.0f;
+    float u2 = 1.0f;
     int32 seg_time = spline.length(point_Idx, point_Idx+1);
     if (seg_time > 0)
+    {
         u = (time_passed - spline.length(point_Idx)) / (float)seg_time;
+        u2 = u;
+        if (spell_effect_extra && spell_effect_extra->ProgressCurveId)
+            u = sDB2Manager.GetCurveValueAt(spell_effect_extra->ProgressCurveId, u);
+    }
     Location c;
     c.orientation = initialOrientation;
     spline.evaluate_percent(point_Idx, u, c);
@@ -39,7 +46,7 @@ Location MoveSpline::ComputePosition() const
     if (splineflags.animation)
         ;// MoveSplineFlag::Animation disables falling or parabolic movement
     else if (splineflags.parabolic)
-        computeParabolicElevation(c.z);
+        computeParabolicElevation(c.z, u2 /*progress without curve modifer is expected here*/);
     else if (splineflags.falling)
         computeFallElevation(c.z);
 
@@ -66,12 +73,14 @@ Location MoveSpline::ComputePosition() const
     return c;
 }
 
-void MoveSpline::computeParabolicElevation(float& el) const
+void MoveSpline::computeParabolicElevation(float& el, float u) const
 {
     if (time_passed > effect_start_time)
     {
         float t_passedf = MSToSec(time_passed - effect_start_time);
         float t_durationf = MSToSec(Duration() - effect_start_time); //client use not modified duration here
+        if (spell_effect_extra && spell_effect_extra->ParabolicCurveId)
+            t_passedf *= sDB2Manager.GetCurveValueAt(spell_effect_extra->ParabolicCurveId, u);
 
         // -a*x*x + bx + c:
         //(dur * v3->z_acceleration * dt)/2 - (v3->z_acceleration * dt * dt)/2 + Z;
@@ -165,6 +174,7 @@ void MoveSpline::Initialize(MoveSplineInitArgs const& args)
     time_passed = 0;
     vertical_acceleration = 0.f;
     effect_start_time = 0;
+    spell_effect_extra = args.spellEffectExtra;
     splineIsFacingOnly = args.path.size() == 2 && args.facing.type != MONSTER_MOVE_NORMAL && ((args.path[1] - args.path[0]).length() < 0.1f);
 
     // Check if its a stop spline
@@ -210,6 +220,11 @@ bool MoveSplineInitArgs::Validate(Unit* unit) const
     CHECK(velocity > 0.01f);
     CHECK(time_perc >= 0.f && time_perc <= 1.f);
     CHECK(_checkPathLengths());
+    if (spellEffectExtra)
+    {
+        CHECK(!spellEffectExtra->ProgressCurveId || sCurveStore.LookupEntry(spellEffectExtra->ProgressCurveId));
+        CHECK(!spellEffectExtra->ParabolicCurveId || sCurveStore.LookupEntry(spellEffectExtra->ParabolicCurveId));
+    }
     return true;
 #undef CHECK
 }
diff --git a/src/server/game/Movement/Spline/MoveSpline.h b/src/server/game/Movement/Spline/MoveSpline.h
index f4f1e07cbe0..672c42ac3ab 100644
--- a/src/server/game/Movement/Spline/MoveSpline.h
+++ b/src/server/game/Movement/Spline/MoveSpline.h
@@ -80,12 +80,13 @@ namespace Movement
         int32           effect_start_time;
         int32           point_Idx;
         int32           point_Idx_offset;
+        Optional<SpellEffectExtraData> spell_effect_extra;
 
         void init_spline(const MoveSplineInitArgs& args);
 
     protected:
         MySpline::ControlArray const& getPath() const { return spline.getPoints(); }
-        void computeParabolicElevation(float& el) const;
+        void computeParabolicElevation(float& el, float u) const;
         void computeFallElevation(float& el) const;
 
         UpdateResult _updateState(int32& ms_time_diff);
diff --git a/src/server/game/Movement/Spline/MoveSplineInit.h b/src/server/game/Movement/Spline/MoveSplineInit.h
index f0b5e9aaac0..c873013405a 100644
--- a/src/server/game/Movement/Spline/MoveSplineInit.h
+++ b/src/server/game/Movement/Spline/MoveSplineInit.h
@@ -146,6 +146,8 @@ namespace Movement
          */
         void SetVelocity(float velocity);
 
+        void SetSpellEffectExtraData(SpellEffectExtraData const& spellEffectExtraData);
+
         PointsArray& Path() { return args.path; }
 
         /* Disables transport coordinate transformations for cases where raw offsets are available
@@ -204,5 +206,10 @@ namespace Movement
     }
 
     inline void MoveSplineInit::DisableTransportPathTransformations() { args.TransformForTransport = false; }
+
+    inline void MoveSplineInit::SetSpellEffectExtraData(SpellEffectExtraData const& spellEffectExtraData)
+    {
+        args.spellEffectExtra = spellEffectExtraData;
+    }
 }
 #endif // TRINITYSERVER_MOVESPLINEINIT_H
diff --git a/src/server/game/Movement/Spline/MoveSplineInitArgs.h b/src/server/game/Movement/Spline/MoveSplineInitArgs.h
index 60cb4db8b55..fc5b82102cd 100644
--- a/src/server/game/Movement/Spline/MoveSplineInitArgs.h
+++ b/src/server/game/Movement/Spline/MoveSplineInitArgs.h
@@ -40,6 +40,14 @@ namespace Movement
         FacingInfo() : angle(0.0f), type(MONSTER_MOVE_NORMAL) { }
     };
 
+    struct SpellEffectExtraData
+    {
+        ObjectGuid Target;
+        uint32 SpellVisualId = 0;
+        uint32 ProgressCurveId = 0;
+        uint32 ParabolicCurveId = 0;
+    };
+
     struct MoveSplineInitArgs
     {
         MoveSplineInitArgs(size_t path_capacity = 16) : path_Idx_offset(0), velocity(0.f),
@@ -58,6 +66,7 @@ namespace Movement
         float time_perc;
         uint32 splineId;
         float initialOrientation;
+        Optional<SpellEffectExtraData> spellEffectExtra;
         bool HasVelocity;
         bool TransformForTransport;