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-rw-r--r--NorthstarDLL/server/buildainfile.cpp400
1 files changed, 400 insertions, 0 deletions
diff --git a/NorthstarDLL/server/buildainfile.cpp b/NorthstarDLL/server/buildainfile.cpp
new file mode 100644
index 00000000..f6dc4717
--- /dev/null
+++ b/NorthstarDLL/server/buildainfile.cpp
@@ -0,0 +1,400 @@
+#include "pch.h"
+#include "core/convar/convar.h"
+#include "engine/hoststate.h"
+#include "engine/r2engine.h"
+
+#include <fstream>
+#include <filesystem>
+
+AUTOHOOK_INIT()
+
+const int AINET_VERSION_NUMBER = 57;
+const int AINET_SCRIPT_VERSION_NUMBER = 21;
+const int PLACEHOLDER_CRC = 0;
+const int MAX_HULLS = 5;
+
+#pragma pack(push, 1)
+struct CAI_NodeLink
+{
+ short srcId;
+ short destId;
+ bool hulls[MAX_HULLS];
+ char unk0;
+ char unk1; // maps => unk0 on disk
+ char unk2[5];
+ int64_t flags;
+};
+#pragma pack(pop)
+
+#pragma pack(push, 1)
+struct CAI_NodeLinkDisk
+{
+ short srcId;
+ short destId;
+ char unk0;
+ bool hulls[MAX_HULLS];
+};
+#pragma pack(pop)
+
+#pragma pack(push, 1)
+struct CAI_Node
+{
+ int index; // not present on disk
+ float x;
+ float y;
+ float z;
+ float hulls[MAX_HULLS];
+ float yaw;
+
+ int unk0; // always 2 in buildainfile, maps directly to unk0 in disk struct
+ int unk1; // maps directly to unk1 in disk struct
+ int unk2[MAX_HULLS]; // maps directly to unk2 in disk struct, despite being ints rather than shorts
+
+ // view server.dll+393672 for context and death wish
+ char unk3[MAX_HULLS]; // hell on earth, should map to unk3 on disk
+ char pad[3]; // aligns next bytes
+ float unk4[MAX_HULLS]; // i have no fucking clue, calculated using some kind of demon hell function float magic
+
+ CAI_NodeLink** links;
+ char unk5[16];
+ int linkcount;
+ int unk11; // bad name lmao
+ short unk6; // should match up to unk4 on disk
+ char unk7[16]; // padding until next bit
+ short unk8; // should match up to unk5 on disk
+ char unk9[8]; // padding until next bit
+ char unk10[8]; // should match up to unk6 on disk
+};
+#pragma pack(pop)
+
+// the way CAI_Nodes are represented in on-disk ain files
+#pragma pack(push, 1)
+struct CAI_NodeDisk
+{
+ float x;
+ float y;
+ float z;
+ float yaw;
+ float hulls[MAX_HULLS];
+
+ char unk0;
+ int unk1;
+ short unk2[MAX_HULLS];
+ char unk3[MAX_HULLS];
+ short unk4;
+ short unk5;
+ char unk6[8];
+}; // total size of 68 bytes
+#pragma pack(pop)
+
+#pragma pack(push, 1)
+struct UnkNodeStruct0
+{
+ int index;
+ char unk0;
+ char unk1; // maps to unk1 on disk
+ char pad0[2]; // padding to +8
+
+ float x;
+ float y;
+ float z;
+
+ char pad5[4];
+ int* unk2; // maps to unk5 on disk;
+ char pad1[16]; // pad to +48
+ int unkcount0; // maps to unkcount0 on disk
+
+ char pad2[4]; // pad to +56
+ int* unk3;
+ char pad3[16]; // pad to +80
+ int unkcount1;
+
+ char pad4[132];
+ char unk5;
+};
+#pragma pack(pop)
+
+int* pUnkStruct0Count;
+UnkNodeStruct0*** pppUnkNodeStruct0s;
+
+#pragma pack(push, 1)
+struct UnkLinkStruct1
+{
+ short unk0;
+ short unk1;
+ int unk2;
+ char unk3;
+ char unk4;
+ char unk5;
+};
+#pragma pack(pop)
+
+int* pUnkLinkStruct1Count;
+UnkLinkStruct1*** pppUnkStruct1s;
+
+#pragma pack(push, 1)
+struct CAI_ScriptNode
+{
+ float x;
+ float y;
+ float z;
+ uint64_t scriptdata;
+};
+#pragma pack(pop)
+
+#pragma pack(push, 1)
+struct CAI_Network
+{
+ // +0
+ char unk0[8];
+ // +8
+ int linkcount; // this is uninitialised and never set on ain build, fun!
+ // +12
+ char unk1[124];
+ // +136
+ int zonecount;
+ // +140
+ char unk2[16];
+ // +156
+ int unk5; // unk8 on disk
+ // +160
+ char unk6[4];
+ // +164
+ int hintcount;
+ // +168
+ short hints[2000]; // these probably aren't actually hints, but there's 1 of them per hint so idk
+ // +4168
+ int scriptnodecount;
+ // +4172
+ CAI_ScriptNode scriptnodes[4000];
+ // +84172
+ int nodecount;
+ // +84176
+ CAI_Node** nodes;
+};
+#pragma pack(pop)
+
+char** pUnkServerMapversionGlobal;
+
+ConVar* Cvar_ns_ai_dumpAINfileFromLoad;
+
+void DumpAINInfo(CAI_Network* aiNetwork)
+{
+ fs::path writePath(fmt::format("{}/maps/graphs", R2::g_pModName));
+ writePath /= R2::g_pHostState->m_levelName;
+ writePath += ".ain";
+
+ // dump from memory
+ spdlog::info("writing ain file {}", writePath.string());
+ spdlog::info("");
+ spdlog::info("");
+ spdlog::info("");
+ spdlog::info("");
+ spdlog::info("");
+
+ std::ofstream writeStream(writePath, std::ofstream::binary);
+ spdlog::info("writing ainet version: {}", AINET_VERSION_NUMBER);
+ writeStream.write((char*)&AINET_VERSION_NUMBER, sizeof(int));
+
+ // could probably be cleaner but whatever
+ int mapVersion = *(int*)(*pUnkServerMapversionGlobal + 104);
+ spdlog::info("writing map version: {}", mapVersion); // temp
+ writeStream.write((char*)&mapVersion, sizeof(int));
+ spdlog::info("writing placeholder crc: {}", PLACEHOLDER_CRC);
+ writeStream.write((char*)&PLACEHOLDER_CRC, sizeof(int));
+
+ int calculatedLinkcount = 0;
+
+ // path nodes
+ spdlog::info("writing nodecount: {}", aiNetwork->nodecount);
+ writeStream.write((char*)&aiNetwork->nodecount, sizeof(int));
+
+ for (int i = 0; i < aiNetwork->nodecount; i++)
+ {
+ // construct on-disk node struct
+ CAI_NodeDisk diskNode;
+ diskNode.x = aiNetwork->nodes[i]->x;
+ diskNode.y = aiNetwork->nodes[i]->y;
+ diskNode.z = aiNetwork->nodes[i]->z;
+ diskNode.yaw = aiNetwork->nodes[i]->yaw;
+ memcpy(diskNode.hulls, aiNetwork->nodes[i]->hulls, sizeof(diskNode.hulls));
+ diskNode.unk0 = (char)aiNetwork->nodes[i]->unk0;
+ diskNode.unk1 = aiNetwork->nodes[i]->unk1;
+
+ for (int j = 0; j < MAX_HULLS; j++)
+ {
+ diskNode.unk2[j] = (short)aiNetwork->nodes[i]->unk2[j];
+ spdlog::info((short)aiNetwork->nodes[i]->unk2[j]);
+ }
+
+ memcpy(diskNode.unk3, aiNetwork->nodes[i]->unk3, sizeof(diskNode.unk3));
+ diskNode.unk4 = aiNetwork->nodes[i]->unk6;
+ diskNode.unk5 =
+ -1; // aiNetwork->nodes[i]->unk8; // this field is wrong, however, it's always -1 in vanilla navmeshes anyway, so no biggie
+ memcpy(diskNode.unk6, aiNetwork->nodes[i]->unk10, sizeof(diskNode.unk6));
+
+ spdlog::info("writing node {} from {} to {:x}", aiNetwork->nodes[i]->index, (void*)aiNetwork->nodes[i], writeStream.tellp());
+ writeStream.write((char*)&diskNode, sizeof(CAI_NodeDisk));
+
+ calculatedLinkcount += aiNetwork->nodes[i]->linkcount;
+ }
+
+ // links
+ spdlog::info("linkcount: {}", aiNetwork->linkcount);
+ spdlog::info("calculated total linkcount: {}", calculatedLinkcount);
+
+ calculatedLinkcount /= 2;
+ if (Cvar_ns_ai_dumpAINfileFromLoad->GetBool())
+ {
+ if (aiNetwork->linkcount == calculatedLinkcount)
+ spdlog::info("caculated linkcount is normal!");
+ else
+ spdlog::warn("calculated linkcount has weird value! this is expected on build!");
+ }
+
+ spdlog::info("writing linkcount: {}", calculatedLinkcount);
+ writeStream.write((char*)&calculatedLinkcount, sizeof(int));
+
+ for (int i = 0; i < aiNetwork->nodecount; i++)
+ {
+ for (int j = 0; j < aiNetwork->nodes[i]->linkcount; j++)
+ {
+ // skip links that don't originate from current node
+ if (aiNetwork->nodes[i]->links[j]->srcId != aiNetwork->nodes[i]->index)
+ continue;
+
+ CAI_NodeLinkDisk diskLink;
+ diskLink.srcId = aiNetwork->nodes[i]->links[j]->srcId;
+ diskLink.destId = aiNetwork->nodes[i]->links[j]->destId;
+ diskLink.unk0 = aiNetwork->nodes[i]->links[j]->unk1;
+ memcpy(diskLink.hulls, aiNetwork->nodes[i]->links[j]->hulls, sizeof(diskLink.hulls));
+
+ spdlog::info("writing link {} => {} to {:x}", diskLink.srcId, diskLink.destId, writeStream.tellp());
+ writeStream.write((char*)&diskLink, sizeof(CAI_NodeLinkDisk));
+ }
+ }
+
+ // don't know what this is, it's likely a block from tf1 that got deprecated? should just be 1 int per node
+ spdlog::info("writing {:x} bytes for unknown block at {:x}", aiNetwork->nodecount * sizeof(uint32_t), writeStream.tellp());
+ uint32_t* unkNodeBlock = new uint32_t[aiNetwork->nodecount];
+ memset(unkNodeBlock, 0, aiNetwork->nodecount * sizeof(uint32_t));
+ writeStream.write((char*)unkNodeBlock, aiNetwork->nodecount * sizeof(uint32_t));
+ delete[] unkNodeBlock;
+
+ // TODO: this is traverse nodes i think? these aren't used in tf2 ains so we can get away with just writing count=0 and skipping
+ // but ideally should actually dump these
+ spdlog::info("writing {} traversal nodes at {:x}...", 0, writeStream.tellp());
+ short traverseNodeCount = 0;
+ writeStream.write((char*)&traverseNodeCount, sizeof(short));
+ // only write count since count=0 means we don't have to actually do anything here
+
+ // TODO: ideally these should be actually dumped, but they're always 0 in tf2 from what i can tell
+ spdlog::info("writing {} bytes for unknown hull block at {:x}", MAX_HULLS * 8, writeStream.tellp());
+ char* unkHullBlock = new char[MAX_HULLS * 8];
+ memset(unkHullBlock, 0, MAX_HULLS * 8);
+ writeStream.write(unkHullBlock, MAX_HULLS * 8);
+ delete[] unkHullBlock;
+
+ // unknown struct that's seemingly node-related
+ spdlog::info("writing {} unknown node structs at {:x}", *pUnkStruct0Count, writeStream.tellp());
+ writeStream.write((char*)pUnkStruct0Count, sizeof(*pUnkStruct0Count));
+ for (int i = 0; i < *pUnkStruct0Count; i++)
+ {
+ spdlog::info("writing unknown node struct {} at {:x}", i, writeStream.tellp());
+ UnkNodeStruct0* nodeStruct = (*pppUnkNodeStruct0s)[i];
+
+ writeStream.write((char*)&nodeStruct->index, sizeof(nodeStruct->index));
+ writeStream.write((char*)&nodeStruct->unk1, sizeof(nodeStruct->unk1));
+
+ writeStream.write((char*)&nodeStruct->x, sizeof(nodeStruct->x));
+ writeStream.write((char*)&nodeStruct->y, sizeof(nodeStruct->y));
+ writeStream.write((char*)&nodeStruct->z, sizeof(nodeStruct->z));
+
+ writeStream.write((char*)&nodeStruct->unkcount0, sizeof(nodeStruct->unkcount0));
+ for (int j = 0; j < nodeStruct->unkcount0; j++)
+ {
+ short unk2Short = (short)nodeStruct->unk2[j];
+ writeStream.write((char*)&unk2Short, sizeof(unk2Short));
+ }
+
+ writeStream.write((char*)&nodeStruct->unkcount1, sizeof(nodeStruct->unkcount1));
+ for (int j = 0; j < nodeStruct->unkcount1; j++)
+ {
+ short unk3Short = (short)nodeStruct->unk3[j];
+ writeStream.write((char*)&unk3Short, sizeof(unk3Short));
+ }
+
+ writeStream.write((char*)&nodeStruct->unk5, sizeof(nodeStruct->unk5));
+ }
+
+ // unknown struct that's seemingly link-related
+ spdlog::info("writing {} unknown link structs at {:x}", *pUnkLinkStruct1Count, writeStream.tellp());
+ writeStream.write((char*)pUnkLinkStruct1Count, sizeof(*pUnkLinkStruct1Count));
+ for (int i = 0; i < *pUnkLinkStruct1Count; i++)
+ {
+ // disk and memory structs are literally identical here so just directly write
+ spdlog::info("writing unknown link struct {} at {:x}", i, writeStream.tellp());
+ writeStream.write((char*)(*pppUnkStruct1s)[i], sizeof(*(*pppUnkStruct1s)[i]));
+ }
+
+ // some weird int idk what this is used for
+ writeStream.write((char*)&aiNetwork->unk5, sizeof(aiNetwork->unk5));
+
+ // tf2-exclusive stuff past this point, i.e. ain v57 only
+ spdlog::info("writing {} script nodes at {:x}", aiNetwork->scriptnodecount, writeStream.tellp());
+ writeStream.write((char*)&aiNetwork->scriptnodecount, sizeof(aiNetwork->scriptnodecount));
+ for (int i = 0; i < aiNetwork->scriptnodecount; i++)
+ {
+ // disk and memory structs are literally identical here so just directly write
+ spdlog::info("writing script node {} at {:x}", i, writeStream.tellp());
+ writeStream.write((char*)&aiNetwork->scriptnodes[i], sizeof(aiNetwork->scriptnodes[i]));
+ }
+
+ spdlog::info("writing {} hints at {:x}", aiNetwork->hintcount, writeStream.tellp());
+ writeStream.write((char*)&aiNetwork->hintcount, sizeof(aiNetwork->hintcount));
+ for (int i = 0; i < aiNetwork->hintcount; i++)
+ {
+ spdlog::info("writing hint data {} at {:x}", i, writeStream.tellp());
+ writeStream.write((char*)&aiNetwork->hints[i], sizeof(aiNetwork->hints[i]));
+ }
+
+ writeStream.close();
+}
+
+// clang-format off
+AUTOHOOK(CAI_NetworkBuilder__Build, server.dll + 0x385E20,
+void, __fastcall, (void* builder, CAI_Network* aiNetwork, void* unknown))
+// clang-format on
+{
+ CAI_NetworkBuilder__Build(builder, aiNetwork, unknown);
+
+ DumpAINInfo(aiNetwork);
+}
+
+// clang-format off
+AUTOHOOK(LoadAINFile, server.dll + 0x3933A0,
+void, __fastcall, (void* aimanager, void* buf, const char* filename))
+// clang-format on
+{
+ LoadAINFile(aimanager, buf, filename);
+
+ if (Cvar_ns_ai_dumpAINfileFromLoad->GetBool())
+ {
+ spdlog::info("running DumpAINInfo for loaded file {}", filename);
+ DumpAINInfo(*(CAI_Network**)((char*)aimanager + 2536));
+ }
+}
+
+ON_DLL_LOAD("server.dll", BuildAINFile, (CModule module))
+{
+ AUTOHOOK_DISPATCH()
+
+ Cvar_ns_ai_dumpAINfileFromLoad = new ConVar(
+ "ns_ai_dumpAINfileFromLoad", "0", FCVAR_NONE, "For debugging: whether we should dump ain data for ains loaded from disk");
+
+ pUnkStruct0Count = module.Offset(0x1063BF8).As<int*>();
+ pppUnkNodeStruct0s = module.Offset(0x1063BE0).As<UnkNodeStruct0***>();
+ pUnkLinkStruct1Count = module.Offset(0x1063AA8).As<int*>();
+ pppUnkStruct1s = module.Offset(0x1063A90).As<UnkLinkStruct1***>();
+ pUnkServerMapversionGlobal = module.Offset(0xBFBE08).As<char**>();
+}