Revert "Amend ff2d8cc"

This reverts commit 8c65213.

rts/Sim/Units/Scripts/UnitScript.cpp

@@ -189,6 +189,38 @@ void CUnitScript::TickAnims(int tickRate, const TickAnimFunc& tickAnimFunc, Anim
 	}
 }
 
+/**
+ * @brief Called by the engine when we are registered as animating.
+          If we return false there are no active animations left.
+ * @param deltaTime int delta time to update
+ * @return true if there are still active animations
+ */
+bool CUnitScript::Tick(int deltaTime)
+{
+	ZoneScoped;
+	// vector of indexes of finished animations,
+	// so we can get rid of them in constant time
+	static AnimContainerType doneAnims[AMove + 1];
+
+	// tick-functions; these never change address
+	static constexpr TickAnimFunc tickAnimFuncs[AMove + 1] = { &CUnitScript::TickTurnAnim, &CUnitScript::TickSpinAnim, &CUnitScript::TickMoveAnim };
+
+	for (int animType = ATurn; animType <= AMove; animType++) {
+		TickAnims(1000 / deltaTime, tickAnimFuncs[animType], anims[animType], doneAnims[animType]);
+	}
+
+	// Tell listeners to unblock, and remove finished animations from the unit/script.
+	for (int animType = ATurn; animType <= AMove; animType++) {
+		for (AnimInfo& ai: doneAnims[animType]) {
+			AnimFinished(static_cast<AnimType>(animType), ai.piece, ai.axis);
+		}
+
+		doneAnims[animType].clear();
+	}
+
+	return (HaveAnimations());
+}
+
 /**
  * @brief The multithreaded first half of the original CUnitScript::Tick function first does the heavy lifting of calculating all
 			  new piece positions according to the animations

rts/Sim/Units/Scripts/UnitScript.h

@@ -112,6 +112,7 @@ class CUnitScript
 	      CUnit* GetUnit()       { return unit; }
 	const CUnit* GetUnit() const { return unit; }
 
+	bool Tick(int tickRate);
 	void TickAllAnims(int tickRate);
 	bool TickAnimFinished(int tickRate);
 	// note: must copy-and-set here (LMP dirty flag, etc)