feat(five/streaming): expand train track array

code/components/extra-natives-five/include/Train.h

@@ -16,9 +16,6 @@ struct CTrackNode
 struct CTrainTrack
 {
 public:
-	// This has never changed.
-	static const int kMaxTracks = 27;
-
 	uint32_t m_hash;
 	bool m_enabled;
 	bool m_isLooped;
@@ -33,7 +30,12 @@ struct CTrainTrack
 	uint8_t m_pad[8];
 
 	bool m_disableAmbientTrains;
-	uint8_t m_pad2[0x220];
+
+	uint8_t m_pad2[0x17];
+
+	bool m_isActive;
+
+	uint8_t m_pad3[0x20C];
 
 	// Helper functions
 	static bool AreAllTracksDisabled();

code/components/extra-natives-five/src/TrackNatives.cpp

@@ -96,13 +96,16 @@ static hook::cdecl_stub<rage::CTrainTrack*(uint32_t)> CTrainTrack__getTrainTrack
 	return hook::get_call(hook::get_pattern("E8 ? ? ? ? 33 DB 45 0F 57 DB"));
 });
 
+
+static int kMaxTracks = xbr::IsGameBuildOrGreater<2545>() ? 127 : 27;
+
 static int32_t FindClosestTrack(rage::Vector3& position, int8_t* outTrack)
 {
 	*outTrack = -1;
 	float closestDistance = std::numeric_limits<float>::infinity();
 	int closestNode = -1;
 
-	for (int i = 0; i < rage::CTrainTrack::kMaxTracks; i++)
+	for (int i = 0; i < kMaxTracks; i++)
 	{
 		rage::CTrainTrack* track = CTrainTrack__getTrainTrack(i);
 
@@ -132,7 +135,7 @@ static int32_t FindClosestTrack(rage::Vector3& position, int8_t* outTrack)
 static std::vector<scrTrackNodeInfo> GetTrackNodesInRadius(const float& x, const float& y, const float& z, float radius, bool includeDisabledTracks = false)
 {
 	std::vector<scrTrackNodeInfo> nearbyNodes;
-	for (int8_t i = 0; i < rage::CTrainTrack::kMaxTracks; i++)
+	for (int8_t i = 0; i < kMaxTracks; i++)
 	{
 		rage::CTrainTrack* track = CTrainTrack__getTrainTrack(i);
 
@@ -202,7 +205,7 @@ template<int ArgumentIndex>
 static rage::CTrainTrack* GetAndCheckTrack(fx::ScriptContext& context, std::string_view nn)
 {
 	int trackIndex = context.GetArgument<int>(ArgumentIndex);
-	if (trackIndex < 0 || trackIndex > rage::CTrainTrack::kMaxTracks)
+	if (trackIndex < 0 || trackIndex > kMaxTracks)
 	{
 		fx::scripting::Warningf("natives", "%s: Invalid track index %i\n", nn, trackIndex);
 		context.SetResult(0);
@@ -234,7 +237,7 @@ static rage::CTrackNode* GetAndCheckTrackNode(rage::CTrainTrack* track, int8_t t
 
 bool rage::CTrainTrack::AreAllTracksDisabled()
 {
-	for (int i = 0; i < rage::CTrainTrack::kMaxTracks; i++)
+	for (int i = 0; i < kMaxTracks; i++)
 	{
 		CTrainTrack* track = CTrainTrack__getTrainTrack(i);
 
@@ -447,11 +450,52 @@ static InitFunction initFunction([]()
 	});
 });
 
+static int32_t FindTrackFromNode(void* node)
+{
+	for (int i = 0; i < kMaxTracks; i++)
+	{
+		rage::CTrainTrack* track = CTrainTrack__getTrainTrack(i);
+
+		if (!track || !track->m_enabled)
+		{
+			continue;
+		}
+
+		void* maxNode = &track->m_nodes[track->m_nodeCount - 1];
+		if (node >= track->m_nodes && node <= maxNode)
+		{
+			return i;
+		}
+	}
+
+	return -1;
+}
+
+static bool CTrain__IsTrackActive(int32_t trackIndex)
+{
+	if (trackIndex <= 0 || trackIndex > kMaxTracks)
+	{
+		return false;
+	}
+
+	rage::CTrainTrack* track = CTrainTrack__getTrainTrack(trackIndex);
+
+	if (!track || !track->m_enabled || !track->m_isActive)
+	{
+		return false;
+	}
+
+	return true;
+}
+
 static HookFunction hookFunction([]()
 {
 	MH_Initialize();
 	// add missing enabled check for script created trains.
 	MH_CreateHook(hook::get_call(hook::get_pattern("E8 ? ? ? ? 8B D8 E8 ? ? ? ? 44 8A CF")), FindClosestTrack, NULL);
+	MH_CreateHook(hook::get_call(hook::get_pattern("E8 ? ? ? ? 4C 63 E0 41 83 FC ? 0F 84 ? ? ? ? 49 8B FC")), FindTrackFromNode, NULL);
+	// Doesn't account for negative indexes or disabled tracks.
+	MH_CreateHook(hook::get_call(hook::get_pattern("E8 ? ? ? ? 84 C0 74 ? 33 D2 8B CF")), CTrain__IsTrackActive, NULL);
 	MH_EnableHook(MH_ALL_HOOKS);
 
 	// Prevent game code from constantly setting the trains speed while in moving state if it has the "stopsAtStations" flag enabled from setting the train speed to the tracks max speed while moving.

code/components/gta-streaming-five/src/PatchTrackLimits.cpp

@@ -0,0 +1,160 @@
+/*
+* This file is part of the CitizenFX project - http://citizen.re/
+*
+* See LICENSE and MENTIONS in the root of the source tree for information
+* regarding licensing.
+*/
+#include "StdInc.h"
+
+#include "CrossBuildRuntime.h"
+#include <Local.h>
+#include <Hooking.h>
+#include <Hooking.Stubs.h>
+
+struct PatternPair
+{
+	std::string_view pattern;
+	int offset;
+};
+
+struct ClampPatternPair : PatternPair
+{
+	bool clamp;
+};
+
+struct CTrainTrack
+{
+	char pad[0x250];
+};
+
+struct CTrackData
+{
+	char pad[0xA0];
+};
+
+constexpr int kNumTracks = 127;
+
+static CTrackData** trackStore2;
+static CTrainTrack** trackStore;
+
+static void RelocateRelative(std::initializer_list<PatternPair> list)
+{
+	void* oldAddress = nullptr;
+
+	for (auto& entry : list)
+	{
+		auto location = hook::get_pattern<int32_t>(entry.pattern, entry.offset);
+
+		if (!oldAddress)
+		{
+			oldAddress = hook::get_address<void*>(location);
+		}
+
+		auto curTarget = hook::get_address<void*>(location);
+		assert(curTarget == oldAddress);
+
+		hook::put<int32_t>(location, (intptr_t)trackStore - (intptr_t)location - 4);
+	}
+}
+
+static HookFunction initFunction([]()
+{
+	if (!xbr::IsGameBuildOrGreater<2545>())
+	{
+		return;
+	}
+
+	// patching hardcoded max available train tracks
+	{
+		std::initializer_list<ClampPatternPair> list = {
+			{"41 80 FC ? 0F 8D", 3, false},
+			{"48 8B C1 48 69 C0 ? ? ? ? 44 88 74 30", -2, false},
+			{"41 83 FE ? 0F 8C ? ? ? ? 44 8B 64 24", 3, false},
+			{"41 80 F9 ? 7C", 3, false},
+			{"48 8B C8 8B 05 ? ? ? ? 48 69 C9", -3, false},
+			{"83 FB ? 0F 8C ? ? ? ? 48 83 C4 ? 41 5F 41 5E 41 5C", 2, false},
+			{"83 F9 ? 7D ? 4C 8D 05", 2, false},
+			{"83 F9 ? 7D ? 42 88 54 00", 2, false},
+			{"83 FA ? 7C ? 83 C8 ? C3 8B C2", 2, false},
+			{"83 F9 ? 77 ? 48 63 C1 48 8D 0D ? ? ? ? 48 69 C0 ? ? ? ? 48 03 C1 44 39 48", 2, true},
+			{"FF C3 83 FB ? 0F 8C ? ? ? ? 48 83 C4", 4, true},
+			{"83 FA ? 0F 87 ? ? ? ? F3 0F 10 0E", 2, true},
+			{"83 FA ? 0F 87 ? ? ? ? F3 0F 10 35",2, true},
+			{"80 FA ? 77 ? 45 85 C0", 2, true}
+		};
+
+		for (auto& entry : list)
+		{
+			auto location = hook::pattern(entry.pattern).count(1).get(0).get<int>(entry.offset);		
+			hook::put<uint8_t>(location, (entry.clamp ? (kNumTracks - 1) : kNumTracks));
+		}
+	}
+
+	// patching pointers to static track array
+	{
+		trackStore = (CTrainTrack**)hook::AllocateStubMemory(sizeof(CTrainTrack) * kNumTracks);
+
+		RelocateRelative({
+			{"48 8D 0D ? ? ? ? 45 8A C7 48 8B C7", 3},
+			{"4B 8D 14 64", 7},
+			{"48 8D 05 ? ? ? ? 48 69 C9 ? ? ? ? 48 8B 44 01", 3},
+			{"4C 8D 15 ? ? ? ? 33 FF", 3},
+			{"66 0F 6E 4C 08", -4},
+			{"42 38 44 02", -11},
+			{"48 8D 35 ? ? ? ? 44 8B 78", 3},
+			{"49 0F BE CC", 7},
+			{"48 8D 35 ? ? ? ? 41 BB", 3},
+			{"F3 0F 11 4D ? F3 0F 10 54 C8", -14},
+			{"89 44 11 ? 48 83 7C 24", -11},
+			{"8B CB E8 ? ? ? ? 83 25 ? ? ? ? ? E9", -21},
+			{"48 8D 2D ? ? ? ? 49 8B D3", 3},
+			{"48 69 FF ? ? ? ? 44 8B 64 07", -6},
+			{"48 8D 2D ? ? ? ? 48 85 F6 74 ? 85 DB", 3},
+			{"48 89 5C 24 ? 48 0F BE C1", 5 + 4 + 3},
+			{"49 63 C9 48 8D 35", 6},
+			{"84 C9 78 ? 48 0F BE C1 4C 8D 05", 11},
+			{"4C 0F BE C9", 7},
+			{"74 ? F3 43 0F 10 5C 3B", -17},
+			{"41 83 38 ? 74 ? 48 63 C2", 12},
+			{"48 0F BE D2 4C 8D 15", 7},
+			{"48 8D 3D ? ? ? ? 0F 29 74 24 ? 4C 8D 14 40", 3},
+			{"74 ? 48 0F BE 81", 13},
+			{"4C 8D 25 ? ? ? ? 44 0F 28 C6", 3},
+			{"48 8D 05 ? ? ? ? 48 69 FF ? ? ? ? 48 03 F8 0F 84", 3},
+			{"48 85 DB 0F 84 ? ? ? ? 48 8D 3D", 12},
+			{"4C 8D 3D ? ? ? ? 48 8D 15 ? ? ? ? 84 C0", 3},
+			{"48 8D 3D ? ? ? ? 48 8B 5B", 3},
+			{"48 8D 0D ? ? ? ? 83 B8", 3},
+			{"48 8D 0D ? ? ? ? 8A 83 ? ? ? ? 84 C0", 3},
+			{"EB ? 33 C9 84 C9 75 ? 8A 83", -15},
+			{"48 8D 0D ? ? ? ? 48 69 C0 ? ? ? ? 8A 4C 08 ? EB ? 0F 2F F2", 3},
+			{"48 83 EC ? 48 63 F9 48 8D 35", 10},
+			{"4C 8D 05 ? ? ? ? 48 69 C0 ? ? ? ? 42 C6 44 00", 3},
+			{"48 69 C9 ? ? ? ? 42 88 54 01", -7},
+			{"33 F6 45 8B D8 48 8B F9", 11},
+			{"48 03 C1 83 78", -11},
+			{"33 C0 84 C9 78 ? 38 05", 19},
+			{"48 03 C1 44 39 48", -11}
+		});
+
+		// Patch getTrainTrack function
+		if (xbr::IsGameBuildOrGreater<2944>())
+		{
+			auto location = (hook::get_call(hook::get_pattern<int32_t>("E8 ? ? ? ? 33 DB 45 0F 57 DB")) + 0x5);
+			hook::put<int32_t>(location, (intptr_t)trackStore - (intptr_t)location - 4);
+		}
+		else
+		{
+			RelocateRelative({
+				{"48 8D 0D ? ? ? ? 48 69 C0 ? ? ? ? 48 03 C1 C3 90", 3}
+			});
+		}
+	}
+
+	// Patch another static array related to trains
+	{
+		trackStore2 = (CTrackData**)hook::AllocateStubMemory((sizeof(CTrackData) * kNumTracks) * 20);
+		auto location = hook::get_pattern<int32_t>("48 8D 05 ? ? ? ? 49 C1 E0 ? 48 69 F6", 3);
+		hook::put<int32_t>(location, (intptr_t)trackStore2 - (intptr_t)location - 4);
+	}
+});