From e638cc9323c7b74279f0274591264efc53c29d4d Mon Sep 17 00:00:00 2001
From: Kawe Mazidjatari <48657826+Mauler125@users.noreply.github.com>
Date: Fri, 5 Jul 2024 15:47:56 +0200
Subject: [PATCH] Server: create new core NavMesh types

Create new types which will be used to refactor the current Detour implementation in the SDK.
---
 src/public/game/server/ai_agent.h   | 38 +++++++++++++++++++++
 src/public/game/server/ai_navmesh.h | 53 +++++++++++++++++++++++++++++
 2 files changed, 91 insertions(+)
 create mode 100644 src/public/game/server/ai_agent.h
 create mode 100644 src/public/game/server/ai_navmesh.h

diff --git a/src/public/game/server/ai_agent.h b/src/public/game/server/ai_agent.h
new file mode 100644
index 00000000..a99314ce
--- /dev/null
+++ b/src/public/game/server/ai_agent.h
@@ -0,0 +1,38 @@
+//=============================================================================//
+//
+// Purpose: defines the agent types for AI
+//
+//=============================================================================//
+#ifndef AI_AGENT_H
+#define AI_AGENT_H
+
+// The traverse types determine the animations, they also determine the jump
+// links that can be taken (e.g. ANIMTYPE_FRAG_DRONE can take far more jumps
+// than ANIMTYPE_STALKER. This is determined during the creation of the static
+// pathing data in the NavMesh.
+enum TraverseAnimType_e
+{
+	// NAVMESH_SMALL
+	ANIMTYPE_HUMAN = 0,
+	ANIMTYPE_SPECTRE,
+	ANIMTYPE_STALKER,
+	ANIMTYPE_FRAG_DRONE,
+	ANIMTYPE_PILOT,
+
+	// NAVMESH_MED_SHORT
+	ANIMTYPE_PROWLER,
+
+	// NAVMESH_MEDIUM
+	ANIMTYPE_SUPER_SPECTRE,
+
+	// NAVMESH_LARGE
+	ANIMTYPE_TITAN,
+
+	// NAVMESH_EXTRA_LARGE
+	ANIMTYPE_GOLIATH,
+
+	// Not an anim type!
+	ANIMTYPE_COUNT
+};
+
+#endif // AI_AGENT_H
diff --git a/src/public/game/server/ai_navmesh.h b/src/public/game/server/ai_navmesh.h
new file mode 100644
index 00000000..005b3182
--- /dev/null
+++ b/src/public/game/server/ai_navmesh.h
@@ -0,0 +1,53 @@
+//=============================================================================//
+//
+// Purpose: defines the NavMesh types for AI
+//
+//=============================================================================//
+#ifndef AI_NAVMESH_H
+#define AI_NAVMESH_H
+
+#include "ai_agent.h"
+
+enum NavMeshType_e
+{
+	NAVMESH_SMALL = 0,
+	NAVMESH_MED_SHORT,
+	NAVMESH_MEDIUM,
+	NAVMESH_LARGE,
+	NAVMESH_EXTRA_LARGE,
+
+	// Not a NavMesh!
+	NAVMESH_COUNT
+};
+
+inline const char* const g_navMeshNames[NAVMESH_COUNT] = {
+	"small",
+	"med_short",
+	"medium",
+	"large",
+	"extra_large"
+};
+
+inline const char* NavMesh_GetNameForType(const NavMeshType_e navMeshType)
+{
+	Assert(navMeshType >= 0 && navMeshType < NAVMESH_COUNT);
+	return g_navMeshNames[navMeshType];
+}
+
+inline const int g_traverseAnimTypeSetTableIndices[ANIMTYPE_COUNT] = {
+	// NAVMESH_SMALL has 5 reachability tables, so each traverse anim type indexes
+	// into its own.
+	0, 0, 0, 0, 0,
+
+	// All other navmeshes have 1 reachability table, so we need to subtract the
+	// number from the enumerant to index into the first one.
+	-5, -6, -7, -8
+};
+
+inline int NavMesh_GetReachabilityTableIndexForTraverseAnimType(const TraverseAnimType_e animType)
+{
+	Assert(animType >= 0 && animType < V_ARRAYSIZE(g_traverseAnimTypeSetTableIndices));
+	return animType + g_traverseAnimTypeSetTableIndices[animType];
+}
+
+#endif // AI_NAVMESH_H