From aa734ef7ae91ad1d48fd4069c3a12508fc0ee35a Mon Sep 17 00:00:00 2001
From: David Markowitz <EmosewaMC@gmail.com>
Date: Mon, 7 Aug 2023 00:44:57 -0700
Subject: [PATCH] Working Pausing and Resuming

---
 dGame/dComponents/MovementAIComponent.cpp | 25 +++++++++++++++++++++--
 dGame/dComponents/MovementAIComponent.h   | 11 ++++++++++
 2 files changed, 34 insertions(+), 2 deletions(-)

diff --git a/dGame/dComponents/MovementAIComponent.cpp b/dGame/dComponents/MovementAIComponent.cpp
index 7f17fb18..f0487ad5 100644
--- a/dGame/dComponents/MovementAIComponent.cpp
+++ b/dGame/dComponents/MovementAIComponent.cpp
@@ -25,6 +25,7 @@ namespace {
 
 MovementAIComponent::MovementAIComponent(Entity* parent, MovementAIInfo info) : Component(parent) {
 	m_Info = info;
+	m_IsPaused = true;
 	m_AtFinalWaypoint = true;
 
 	m_BaseCombatAI = nullptr;
@@ -70,8 +71,8 @@ void MovementAIComponent::Update(const float deltaTime) {
 		return;
 	}
 
-	// Are we done?
-	if (AtFinalWaypoint()) return;
+	// Are we done or paused?
+	if (AtFinalWaypoint() || IsPaused()) return;
 
 	if (m_HaltDistance > 0) {
 		// Prevent us from hugging the target
@@ -207,6 +208,25 @@ bool MovementAIComponent::Warp(const NiPoint3& point) {
 	return true;
 }
 
+void MovementAIComponent::Pause() {
+	if (AtFinalWaypoint() || IsPaused()) return;
+	SetPosition(ApproximateLocation());
+	SetVelocity(NiPoint3::ZERO);
+
+	// Clear this as we may be somewhere else when we resume movement.
+	m_InterpolatedWaypoints.clear();
+	m_IsPaused = true;
+	m_PathIndex = 0;
+	m_TimeToTravel = 0;
+	m_TimeTravelled = 0;
+}
+
+void MovementAIComponent::Resume() {
+	if (AtFinalWaypoint() || !IsPaused()) return;
+	m_IsPaused = false;
+	SetDestination(GetCurrentPathWaypoint());
+}
+
 void MovementAIComponent::Stop() {
 	if (AtFinalWaypoint()) return;
 
@@ -363,6 +383,7 @@ void MovementAIComponent::SetDestination(const NiPoint3& destination) {
 	m_TimeToTravel = 0;
 
 	m_AtFinalWaypoint = false;
+	m_IsPaused = false;
 }
 
 NiPoint3 MovementAIComponent::GetDestination() const {
diff --git a/dGame/dComponents/MovementAIComponent.h b/dGame/dComponents/MovementAIComponent.h
index 5148dfdf..76d12b32 100644
--- a/dGame/dComponents/MovementAIComponent.h
+++ b/dGame/dComponents/MovementAIComponent.h
@@ -173,6 +173,12 @@ public:
 	 */
 	bool AtFinalWaypoint() const { return m_AtFinalWaypoint; }
 
+	bool IsPaused() const { return m_IsPaused; }
+
+	void Pause();
+
+	void Resume();
+
 	/**
 	 * Renders the entity stationary
 	 */
@@ -322,6 +328,11 @@ private:
 	 * Whether or not the path is being read in reverse 
 	 */
 	bool m_IsInReverse;
+
+	/**
+	 * Whether or not the current movement via pathing is paused.
+	 */
+	bool m_IsPaused;
 };
 
 #endif // MOVEMENTAICOMPONENT_H