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[CmdletBinding()]
param(
[Parameter(Mandatory = $true)]
[int]$ProcessId,
[ValidateRange(1, 16384)]
[int]$ViewportWidth = 1024,
[ValidateRange(1, 16384)]
[int]$ViewportHeight = 768,
[ValidateRange(0.001, 1000.0)]
[double]$NearPlane = 0.5,
[ValidateRange(0.01, 100000.0)]
[double]$FarPlane = 700.0,
[ValidateRange(0.01, 3.13)]
[double]$FieldOfViewRadians = 1.3
)
Set-StrictMode -Version Latest
$ErrorActionPreference = 'Stop'
# This observer deliberately opens only PROCESS_QUERY_INFORMATION | PROCESS_VM_READ.
# It neither sends input nor writes, suspends, injects into, or calls the original game.
Add-Type -TypeDefinition @'
using System;
using System.Runtime.InteropServices;
public static class FparkanOriginalCamera {
public const uint TH32CS_SNAPMODULE = 0x00000008;
public const uint TH32CS_SNAPMODULE32 = 0x00000010;
public const uint PROCESS_QUERY_INFORMATION = 0x00000400;
public const uint PROCESS_VM_READ = 0x00000010;
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct MODULEENTRY32 {
public uint dwSize;
public uint th32ModuleID;
public uint th32ProcessID;
public uint GlblcntUsage;
public uint ProccntUsage;
public IntPtr modBaseAddr;
public uint modBaseSize;
public IntPtr hModule;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 256)] public string szModule;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 260)] public string szExePath;
}
[DllImport("kernel32.dll", SetLastError = true)]
public static extern IntPtr CreateToolhelp32Snapshot(uint flags, uint processId);
[DllImport("kernel32.dll", CharSet = CharSet.Unicode, SetLastError = true)]
public static extern bool Module32First(IntPtr snapshot, ref MODULEENTRY32 entry);
[DllImport("kernel32.dll", CharSet = CharSet.Unicode, SetLastError = true)]
public static extern bool Module32Next(IntPtr snapshot, ref MODULEENTRY32 entry);
[DllImport("kernel32.dll", SetLastError = true)]
public static extern IntPtr OpenProcess(uint access, bool inheritHandle, uint processId);
[DllImport("kernel32.dll", SetLastError = true)]
public static extern bool ReadProcessMemory(
IntPtr process,
IntPtr address,
[Out] byte[] buffer,
IntPtr size,
out IntPtr bytesRead);
[DllImport("kernel32.dll", SetLastError = true)]
public static extern bool CloseHandle(IntPtr handle);
}
'@
function Get-LastWin32ErrorText {
$code = [Runtime.InteropServices.Marshal]::GetLastWin32Error()
"$code ($([ComponentModel.Win32Exception]::new($code).Message))"
}
function Read-OriginalBytes {
param(
[IntPtr]$Process,
[Int64]$Address,
[int]$Length
)
$buffer = [byte[]]::new($Length)
$read = [IntPtr]::Zero
if (-not [FparkanOriginalCamera]::ReadProcessMemory(
$Process,
[IntPtr]$Address,
$buffer,
[IntPtr]$Length,
[ref]$read)) {
throw "ReadProcessMemory at 0x$('{0:X8}' -f $Address) failed: $(Get-LastWin32ErrorText)"
}
if ($read.ToInt64() -ne $Length) {
throw "ReadProcessMemory at 0x$('{0:X8}' -f $Address) returned $($read.ToInt64()) of $Length bytes"
}
$buffer
}
$snapshot = [FparkanOriginalCamera]::CreateToolhelp32Snapshot(
[FparkanOriginalCamera]::TH32CS_SNAPMODULE -bor [FparkanOriginalCamera]::TH32CS_SNAPMODULE32,
[uint32]$ProcessId
)
if ($snapshot -eq [IntPtr]::Zero -or $snapshot.ToInt64() -eq -1) {
throw "CreateToolhelp32Snapshot failed: $(Get-LastWin32ErrorText)"
}
$terrainBase = $null
try {
$module = [FparkanOriginalCamera+MODULEENTRY32]::new()
$module.dwSize = [Runtime.InteropServices.Marshal]::SizeOf([type][FparkanOriginalCamera+MODULEENTRY32])
if (-not [FparkanOriginalCamera]::Module32First($snapshot, [ref]$module)) {
throw "Module32First failed: $(Get-LastWin32ErrorText)"
}
do {
if ($module.szModule -ieq 'Terrain.dll') {
$terrainBase = $module.modBaseAddr.ToInt64()
break
}
$module = [FparkanOriginalCamera+MODULEENTRY32]::new()
$module.dwSize = [Runtime.InteropServices.Marshal]::SizeOf([type][FparkanOriginalCamera+MODULEENTRY32])
} while ([FparkanOriginalCamera]::Module32Next($snapshot, [ref]$module))
} finally {
[void][FparkanOriginalCamera]::CloseHandle($snapshot)
}
if ($null -eq $terrainBase) {
throw "Terrain.dll is not loaded by process $ProcessId"
}
$process = [FparkanOriginalCamera]::OpenProcess(
[FparkanOriginalCamera]::PROCESS_QUERY_INFORMATION -bor [FparkanOriginalCamera]::PROCESS_VM_READ,
$false,
[uint32]$ProcessId
)
if ($process -eq [IntPtr]::Zero) {
throw "OpenProcess(PROCESS_QUERY_INFORMATION | PROCESS_VM_READ) failed: $(Get-LastWin32ErrorText)"
}
try {
# Terrain.dll image RVA 0x7355c -> active camera interface pointer.
# Selector 0's matrix is prefixed by a four-byte internal tag, so the
# 16 IEEE-754 row-major words begin at interface + 32, not + 28.
$cameraPointerBytes = Read-OriginalBytes $process ($terrainBase + 0x7355c) 4
$cameraInterface = [BitConverter]::ToUInt32($cameraPointerBytes, 0)
if ($cameraInterface -lt 0x10000) {
throw "Terrain camera pointer is unavailable or invalid: 0x$('{0:X8}' -f $cameraInterface)"
}
$matrixBytes = Read-OriginalBytes $process ([int64]$cameraInterface + 32) 64
$words = for ($index = 0; $index -lt 16; $index++) {
[BitConverter]::ToUInt32($matrixBytes, $index * 4)
}
[ordered]@{
schema = 'fparkan-legacy-camera-v1'
process_id = $ProcessId
terrain_module_base = ('0x{0:X8}' -f $terrainBase)
terrain_camera_global_rva = '0x7355c'
selector0_words = @($words)
# LegacyD3d7Projection carries a D3D7 RECT: left, top, right, bottom.
viewport = @(0, 0, $ViewportWidth, $ViewportHeight)
near_plane = $NearPlane
far_plane = $FarPlane
field_of_view_radians = $FieldOfViewRadians
} | ConvertTo-Json -Depth 4 -Compress
} finally {
[void][FparkanOriginalCamera]::CloseHandle($process)
}
|
