/// <summary>
/// Returns the application path of the specified application, as found in the system registry.
/// </summary>
/// <param name="appName">Name of the application as set in the registry.</param>
/// <returns>Returns application path of the specified applicatoin.</returns>
public static string GetApplicationPath(string appName)
{
// For Windows, we look at the registry entries made by the Houdini installer. We look for the
// "active version" key which gives us the most recently installed Houdini version. Using the
// active version we find the registry made by that particular installer and find the install
// path.
string correctVersion =
HEU_HoudiniVersion.HOUDINI_MAJOR + "." +
HEU_HoudiniVersion.HOUDINI_MINOR + "." +
HEU_HoudiniVersion.HOUDINI_BUILD;
// Note the extra 0 for the "minor-minor" version that's needed here.
string correctVersionKey =
HEU_HoudiniVersion.HOUDINI_MAJOR + "." +
HEU_HoudiniVersion.HOUDINI_MINOR + "." +
"0" + "." +
HEU_HoudiniVersion.HOUDINI_BUILD;
// HOUDINI_PATCH is a const variable, hence the 'unreachable code' warning.
// However, it's a const variable in HoudiniVersion.cs which is a generated
// file and could have the value be non-zero for certain builds, like
// stub builds.
#pragma warning disable 162
if (HEU_HoudiniVersion.HOUDINI_PATCH != 0)
{
correctVersionKey += "." + HEU_HoudiniVersion.HOUDINI_PATCH;
}
#pragma warning restore 162
string appPath = HEU_PlatformWin.GetRegistryKeyvalue_x64(HEU_PlatformWin.HKEY_LOCAL_MACHINE, HEU_HoudiniVersion.SIDEFX_SOFTWARE_REGISTRY + appName, correctVersionKey);
if (appPath == null || appPath.Length == 0)
{
// Try 32-bit entry (for Steam builds)
appPath = HEU_PlatformWin.GetRegistryKeyvalue_x86(HEU_PlatformWin.HKEY_LOCAL_MACHINE, HEU_HoudiniVersion.SIDEFX_SOFTWARE_REGISTRY + appName, correctVersionKey);
if (appPath == null || appPath.Length == 0)
{
throw new HEU_HoudiniEngineError(string.Format("Expected version {0} of {1} not found in the system registry!", correctVersion, appName));
}
}
if (appPath.EndsWith("\\") || appPath.EndsWith("/"))
{
appPath = appPath.Remove(appPath.Length - 1);
}
return(appPath);
}
/// <summary>
/// Returns the path to the Houdini Engine plugin installation.
/// </summary>
/// <returns>Path to the Houdini Engine plugin installation.</returns>
public static string GetHoudiniEnginePath()
{
string HAPIPath = null;
#if UNITY_EDITOR_WIN || UNITY_STANDALONE_WIN
// Look up in environment variable
HAPIPath = System.Environment.GetEnvironmentVariable(HEU_Defines.HAPI_PATH, System.EnvironmentVariableTarget.Machine);
if(HAPIPath == null || HAPIPath.Length == 0)
{
HAPIPath = System.Environment.GetEnvironmentVariable(HEU_Defines.HAPI_PATH, System.EnvironmentVariableTarget.User);
}
if (HAPIPath == null || HAPIPath.Length == 0)
{
HAPIPath = System.Environment.GetEnvironmentVariable(HEU_Defines.HAPI_PATH, System.EnvironmentVariableTarget.Process);
}
if(HAPIPath == null || HAPIPath.Length == 0)
{
// HAPI_PATH not set. Look in registry.
string[] houdiniAppNames = { "Houdini Engine", "Houdini" };
foreach (string appName in houdiniAppNames)
{
try
{
HAPIPath = HEU_PlatformWin.GetApplicationPath(appName);
break;
}
catch (HEU_HoudiniEngineError error)
{
_lastErrorMsg = error.ToString();
}
}
//Debug.Log("HAPI Path: " + HAPIPath);
}
#elif (UNITY_EDITOR_OSX || UNITY_STANDALONE_OSX || UNITY_STANDALONE_LINUX)
HAPIPath = HEU_HoudiniVersion.HOUDINI_INSTALL_PATH;
#else
_lastErrorMsg = "Unable to find Houdini installation because this is an unsupported platform!";
#endif
return HAPIPath;
}
