/// <summary>
/// Gets a copy of all (user key string, user value string) pairs attached to this geometry.
/// </summary>
/// <returns>A new collection.</returns>
internal System.Collections.Specialized.NameValueCollection _GetUserStrings()
{
System.Collections.Specialized.NameValueCollection rc = new System.Collections.Specialized.NameValueCollection();
IntPtr const_ptr_this = ConstPointer();
int count = 0;
IntPtr ptr_userstrings = UnsafeNativeMethods.ON_Object_GetUserStrings(const_ptr_this, ref count);
using (var keyHolder = new StringHolder())
using (var valueHolder = new StringHolder())
{
IntPtr pKeyHolder = keyHolder.NonConstPointer();
IntPtr pValueHolder = valueHolder.NonConstPointer();
for (int i = 0; i < count; i++)
{
UnsafeNativeMethods.ON_UserStringList_KeyValue(ptr_userstrings, i, true, pKeyHolder);
UnsafeNativeMethods.ON_UserStringList_KeyValue(ptr_userstrings, i, false, pValueHolder);
string key = keyHolder.ToString();
string value = valueHolder.ToString();
if (!string.IsNullOrEmpty(key) && !string.IsNullOrEmpty(value))
{
rc.Add(key, value);
}
}
}
if (IntPtr.Zero != ptr_userstrings)
{
UnsafeNativeMethods.ON_UserStringList_Delete(ptr_userstrings);
}
return(rc);
}
/// <summary>
/// Gets the debug dumps. This is a text description of the geometric contents.
/// DebugDump() is intended for debugging and is not suitable for creating high
/// quality text descriptions of an object.
/// </summary>
/// <param name="bezierCurve">curve to evaluate</param>
/// <returns>A debug dump text.</returns>
public static string DebugDumpToString(Rhino.Geometry.BezierCurve bezierCurve)
{
IntPtr pConstThis = bezierCurve.ConstPointer();
using (var sh = new StringHolder())
{
IntPtr pString = sh.NonConstPointer();
UnsafeNativeMethods.ON_BezierCurve_Dump(pConstThis, pString);
return sh.ToString();
}
}
/// <summary>
/// Gets the debug dumps. This is a text description of the geometric contents.
/// DebugDump() is intended for debugging and is not suitable for creating high
/// quality text descriptions of an object.
/// </summary>
/// <param name="geometry">Some geometry.</param>
/// <returns>A debug dump text.</returns>
public static string DebugDumpToString(Rhino.Geometry.GeometryBase geometry)
{
IntPtr pConstThis = geometry.ConstPointer();
using (var sh = new StringHolder())
{
IntPtr pString = sh.NonConstPointer();
UnsafeNativeMethods.ON_Object_Dump(pConstThis, pString);
return sh.ToString();
}
}
/// <summary>
/// Gets user string from this geometry.
/// </summary>
/// <param name="key">id used to retrieve the string.</param>
/// <returns>string associated with the key if successful. null if no key was found.</returns>
internal string _GetUserString(string key)
{
IntPtr pThis = ConstPointer();
using (var sh = new StringHolder())
{
IntPtr pStringHolder = sh.NonConstPointer();
UnsafeNativeMethods.ON_Object_GetUserString(pThis, key, pStringHolder);
return(sh.ToString());
}
}
/// <summary>
/// Determines if an object is valid. Also provides a report on errors if this
/// object happens not to be valid.
/// </summary>
/// <param name="log">A textual log. This out parameter is assigned during this call.</param>
/// <returns>true if this object is valid; false otherwise.</returns>
public bool IsValidWithLog(out string log)
{
IntPtr const_ptr_this = ConstPointer();
using (var sh = new StringHolder())
{
IntPtr ptr_string = sh.NonConstPointer();
bool rc = UnsafeNativeMethods.ON_Object_IsValid(const_ptr_this, ptr_string);
log = sh.ToString();
return(rc);
}
}
/// <summary>
/// Gets the debug dumps. This is a text description of the geometric contents.
/// DebugDump() is intended for debugging and is not suitable for creating high
/// quality text descriptions of an object.
/// </summary>
/// <param name="bezierCurve">curve to evaluate</param>
/// <returns>A debug dump text.</returns>
public static string DebugDumpToString(Rhino.Geometry.BezierCurve bezierCurve)
{
IntPtr pConstThis = bezierCurve.ConstPointer();
using (Rhino.Runtime.StringHolder sh = new StringHolder())
{
IntPtr pString = sh.NonConstPointer();
UnsafeNativeMethods.ON_BezierCurve_Dump(pConstThis, pString);
return sh.ToString();
}
}
internal static void WriteIntoSerializationInfo(IntPtr pRhCmnProfileContext, System.Runtime.Serialization.SerializationInfo info, string prefixStrip)
{
const int _string = 1;
const int _multistring = 2;
const int _uuid = 3;
const int _color = 4;
const int _int = 5;
const int _double = 6;
const int _rect = 7;
const int _point = 8;
const int _3dpoint = 9;
const int _xform = 10;
const int _3dvector = 11;
const int _meshparams = 12;
const int _buffer = 13;
const int _bool = 14;
int count = UnsafeNativeMethods.CRhCmnProfileContext_Count(pRhCmnProfileContext);
using (StringHolder sectionholder = new StringHolder())
using (StringHolder entryholder = new StringHolder())
{
IntPtr pStringSection = sectionholder.NonConstPointer();
IntPtr pStringEntry = entryholder.NonConstPointer();
for (int i = 0; i < count; i++)
{
int pctype = 0;
UnsafeNativeMethods.CRhCmnProfileContext_Item(pRhCmnProfileContext, i, pStringSection, pStringEntry, ref pctype);
string section = sectionholder.ToString();
string entry = entryholder.ToString();
if (string.IsNullOrEmpty(entry))
continue;
string name = string.IsNullOrEmpty(section) ? entry : section + "\\" + entry;
if (name.StartsWith(prefixStrip + "\\"))
name = name.Substring(prefixStrip.Length + 1);
name = name.Replace("\\", "::");
switch (pctype)
{
case _string:
{
UnsafeNativeMethods.CRhinoProfileContext_LoadString(pRhCmnProfileContext, section, entry, pStringEntry);
string val = entryholder.ToString();
info.AddValue(name, val);
}
break;
case _multistring:
{
IntPtr pStrings = UnsafeNativeMethods.ON_StringArray_New();
int array_count = UnsafeNativeMethods.CRhinoProfileContext_LoadStrings(pRhCmnProfileContext, section, entry, pStrings);
string[] s = new string[array_count];
for( int j=0; j<array_count; j++ )
{
UnsafeNativeMethods.ON_StringArray_Get(pStrings, j, pStringEntry);
s[j] = entryholder.ToString();
}
info.AddValue(name, s);
}
break;
case _uuid:
{
Guid id = Guid.Empty;
UnsafeNativeMethods.CRhinoProfileContext_LoadGuid(pRhCmnProfileContext, section, entry, ref id);
info.AddValue(name, id);
}
break;
case _color:
{
int abgr = 0;
UnsafeNativeMethods.CRhinoProfileContext_LoadColor(pRhCmnProfileContext, section, entry, ref abgr);
System.Drawing.Color c = System.Drawing.ColorTranslator.FromWin32(abgr);
//string s = System.Drawing.ColorTranslator.ToHtml(c);
info.AddValue(name, c);
}
break;
case _int:
{
int ival = 0;
UnsafeNativeMethods.CRhinoProfileContext_LoadInt(pRhCmnProfileContext, section, entry, ref ival);
info.AddValue(name, ival);
}
break;
case _double:
{
double dval = 0;
UnsafeNativeMethods.CRhinoProfileContext_LoadDouble(pRhCmnProfileContext, section, entry, ref dval);
info.AddValue(name, dval);
}
break;
case _rect:
{
int left = 0, top = 0, right = 0, bottom = 0;
UnsafeNativeMethods.CRhinoProfileContext_LoadRect(pRhCmnProfileContext, section, entry, ref left, ref top, ref right, ref bottom);
System.Drawing.Rectangle r = System.Drawing.Rectangle.FromLTRB(left, top, right, bottom);
info.AddValue(name, r);
}
break;
case _point:
{
int x = 0, y = 0;
UnsafeNativeMethods.CRhinoProfileContext_LoadPoint(pRhCmnProfileContext, section, entry, ref x, ref y);
System.Drawing.Point pt = new System.Drawing.Point(x, y);
info.AddValue(name, pt);
}
break;
case _3dpoint:
{
Rhino.Geometry.Point3d pt = new Geometry.Point3d();
UnsafeNativeMethods.CRhinoProfileContext_LoadPoint3d(pRhCmnProfileContext, section, entry, ref pt);
info.AddValue(name, pt);
}
break;
case _xform:
{
Rhino.Geometry.Transform xf = new Geometry.Transform();
UnsafeNativeMethods.CRhinoProfileContext_LoadXform(pRhCmnProfileContext, section, entry, ref xf);
info.AddValue(name, xf);
}
break;
case _3dvector:
{
Rhino.Geometry.Vector3d vec = new Geometry.Vector3d();
UnsafeNativeMethods.CRhinoProfileContext_LoadVector3d(pRhCmnProfileContext, section, entry, ref vec);
info.AddValue(name, vec);
}
break;
case _meshparams:
{
Rhino.Geometry.MeshingParameters mp = new Geometry.MeshingParameters();
UnsafeNativeMethods.CRhinoProfileContext_LoadMeshParameters(pRhCmnProfileContext, section, entry, mp.NonConstPointer());
info.AddValue(name, mp);
mp.Dispose();
}
break;
case _buffer:
{
//not supported yet
//int buffer_length = UnsafeNativeMethods.CRhinoProfileContext_BufferLength(pRhCmnProfileContext, section, entry);
//byte[] buffer = new byte[buffer_length];
//UnsafeNativeMethods.CRhinoProfileContext_LoadBuffer(pRhCmnProfileContext, section, entry, buffer_length, buffer);
//info.AddValue(name, buffer);
}
break;
case _bool:
{
bool b = false;
UnsafeNativeMethods.CRhinoProfileContext_LoadBool(pRhCmnProfileContext, section, entry, ref b);
info.AddValue(name, b);
}
break;
}
}
}
}
/// <summary>
/// Returns a list of output types which your renderer can write.
/// <para>The default implementation returns bmp, jpg, png, tif, tga.</para>
/// </summary>
/// <returns>A list of file types.</returns>
protected virtual List<Rhino.FileIO.FileType> SupportedOutputTypes()
{
using (StringHolder shExt = new StringHolder())
using (StringHolder shDesc = new StringHolder())
{
var rc = new List<Rhino.FileIO.FileType>();
int iIndex = 0;
while (1 == UnsafeNativeMethods.Rdk_RenderPlugIn_BaseOutputTypeAtIndex(NonConstPointer(), iIndex++, shExt.NonConstPointer(), shDesc.NonConstPointer()))
{
rc.Add(new Rhino.FileIO.FileType(shExt.ToString(), shDesc.ToString()));
}
return rc;
}
}
/// <summary>
/// Gets a plug-in name for an installed plug-in given the path to that plug-in.
/// </summary>
/// <param name="pluginPath">The path of the plug-in.</param>
/// <returns>The plug-in name.</returns>
public static string NameFromPath(string pluginPath)
{
string rc;
using (StringHolder sh = new StringHolder())
{
IntPtr pString = sh.NonConstPointer();
UnsafeNativeMethods.CRhinoPlugInManager_NameFromPath(pluginPath, pString);
rc = sh.ToString();
}
if (string.IsNullOrEmpty(rc))
{
// 2-Nov-2011 Dale Fugier
// Look in our local collection of plug-ins. We may be in "OnLoad"
// and the plug-in hasn't officially been registered with Rhino.
for (int i = 0; i < m_plugins.Count; i++)
{
if (string.Compare(m_plugins[i].Assembly.Location, pluginPath, StringComparison.OrdinalIgnoreCase) == 0)
{
rc = m_plugins[i].Name;
break;
}
}
}
return rc;
}
/// <summary>
/// Determines if an object is valid. Also provides a report on errors if this
/// object happens not to be valid.
/// </summary>
/// <param name="log">A textual log. This out parameter is assigned during this call.</param>
/// <returns>true if this object is valid; false otherwise.</returns>
public bool IsValidWithLog(out string log)
{
IntPtr pConstThis = ConstPointer();
using (StringHolder sh = new StringHolder())
{
IntPtr pString = sh.NonConstPointer();
bool rc = UnsafeNativeMethods.ON_Object_IsValid(pConstThis, pString);
log = sh.ToString();
return rc;
}
}
internal static void WriteIntoSerializationInfo(IntPtr pRhCmnProfileContext, System.Runtime.Serialization.SerializationInfo info, string prefixStrip)
{
const int _string = 1;
const int _multistring = 2;
const int _uuid = 3;
const int _color = 4;
const int _int = 5;
const int _double = 6;
const int _rect = 7;
const int _point = 8;
const int _3dpoint = 9;
const int _xform = 10;
const int _3dvector = 11;
const int _meshparams = 12;
const int _buffer = 13;
const int _bool = 14;
int count = UnsafeNativeMethods.CRhCmnProfileContext_Count(pRhCmnProfileContext);
using (StringHolder sectionholder = new StringHolder())
using (StringHolder entryholder = new StringHolder())
{
IntPtr pStringSection = sectionholder.NonConstPointer();
IntPtr pStringEntry = entryholder.NonConstPointer();
for (int i = 0; i < count; i++)
{
int pctype = 0;
UnsafeNativeMethods.CRhCmnProfileContext_Item(pRhCmnProfileContext, i, pStringSection, pStringEntry, ref pctype);
string section = sectionholder.ToString();
string entry = entryholder.ToString();
if (string.IsNullOrEmpty(entry))
continue;
string name = string.IsNullOrEmpty(section) ? entry : section + "\\" + entry;
if (name.StartsWith(prefixStrip + "\\"))
name = name.Substring(prefixStrip.Length + 1);
name = name.Replace("\\", "::");
switch (pctype)
{
case _string:
{
UnsafeNativeMethods.CRhinoProfileContext_LoadString(pRhCmnProfileContext, section, entry, pStringEntry);
string val = entryholder.ToString();
info.AddValue(name, val);
}
break;
case _multistring:
{
IntPtr pStrings = UnsafeNativeMethods.ON_StringArray_New();
int array_count = UnsafeNativeMethods.CRhinoProfileContext_LoadStrings(pRhCmnProfileContext, section, entry, pStrings);
string[] s = new string[array_count];
for( int j=0; j<array_count; j++ )
{
UnsafeNativeMethods.ON_StringArray_Get(pStrings, j, pStringEntry);
s[j] = entryholder.ToString();
}
info.AddValue(name, s);
}
break;
case _uuid:
{
Guid id = Guid.Empty;
UnsafeNativeMethods.CRhinoProfileContext_LoadGuid(pRhCmnProfileContext, section, entry, ref id);
info.AddValue(name, id);
}
break;
case _color:
{
int abgr = 0;
UnsafeNativeMethods.CRhinoProfileContext_LoadColor(pRhCmnProfileContext, section, entry, ref abgr);
System.Drawing.Color c = Interop.ColorFromWin32(abgr);
//string s = System.Drawing.ColorTranslator.ToHtml(c);
info.AddValue(name, c);
}
break;
case _int:
{
int ival = 0;
UnsafeNativeMethods.CRhinoProfileContext_LoadInt(pRhCmnProfileContext, section, entry, ref ival);
info.AddValue(name, ival);
}
break;
case _double:
{
double dval = 0;
UnsafeNativeMethods.CRhinoProfileContext_LoadDouble(pRhCmnProfileContext, section, entry, ref dval);
info.AddValue(name, dval);
}
break;
case _rect:
{
int left = 0, top = 0, right = 0, bottom = 0;
UnsafeNativeMethods.CRhinoProfileContext_LoadRect(pRhCmnProfileContext, section, entry, ref left, ref top, ref right, ref bottom);
System.Drawing.Rectangle r = System.Drawing.Rectangle.FromLTRB(left, top, right, bottom);
info.AddValue(name, r);
}
break;
case _point:
{
int x = 0, y = 0;
UnsafeNativeMethods.CRhinoProfileContext_LoadPoint(pRhCmnProfileContext, section, entry, ref x, ref y);
System.Drawing.Point pt = new System.Drawing.Point(x, y);
info.AddValue(name, pt);
}
break;
case _3dpoint:
{
Rhino.Geometry.Point3d pt = new Geometry.Point3d();
UnsafeNativeMethods.CRhinoProfileContext_LoadPoint3d(pRhCmnProfileContext, section, entry, ref pt);
info.AddValue(name, pt);
}
break;
case _xform:
{
Rhino.Geometry.Transform xf = new Geometry.Transform();
UnsafeNativeMethods.CRhinoProfileContext_LoadXform(pRhCmnProfileContext, section, entry, ref xf);
info.AddValue(name, xf);
}
break;
case _3dvector:
{
Rhino.Geometry.Vector3d vec = new Geometry.Vector3d();
UnsafeNativeMethods.CRhinoProfileContext_LoadVector3d(pRhCmnProfileContext, section, entry, ref vec);
info.AddValue(name, vec);
}
break;
case _meshparams:
{
Rhino.Geometry.MeshingParameters mp = new Geometry.MeshingParameters();
UnsafeNativeMethods.CRhinoProfileContext_LoadMeshParameters(pRhCmnProfileContext, section, entry, mp.NonConstPointer());
info.AddValue(name, mp);
mp.Dispose();
}
break;
case _buffer:
{
//not supported yet
//int buffer_length = UnsafeNativeMethods.CRhinoProfileContext_BufferLength(pRhCmnProfileContext, section, entry);
//byte[] buffer = new byte[buffer_length];
//UnsafeNativeMethods.CRhinoProfileContext_LoadBuffer(pRhCmnProfileContext, section, entry, buffer_length, buffer);
//info.AddValue(name, buffer);
}
break;
case _bool:
{
bool b = false;
UnsafeNativeMethods.CRhinoProfileContext_LoadBool(pRhCmnProfileContext, section, entry, ref b);
info.AddValue(name, b);
}
break;
}
}
}
}
/// <summary>
/// Passed as a delegate to LicenseUtils.GetLicense(), will call the C++
/// ValidateProductKey() method then and copy CRhinoLicenseValidator C++
/// data to the LicenseData output object.
/// </summary>
/// <param name="productKey"></param>
/// <param name="licenseData">
/// Key information is coppied to this object
/// </param>
/// <returns></returns>
public ValidateResult ValidateProductKey(string productKey, out LicenseData licenseData)
{
// Create an empty LicenseData
licenseData = new LicenseData();
var rc = 0;
// Call back into the C++ unmanaged function pointer
if (IntPtr.Zero != _validator)
{
rc = UnsafeNativeMethods.RHC_ValidateProductKey(productKey, _validator);
}
if (rc != 1)
{
return(-1 == rc ? ValidateResult.ErrorHideMessage : ValidateResult.ErrorShowMessage);
}
// Copy unmanaged C++ validate data to the managed LicenseData
var year = 0;
var month = 0;
var day = 0;
var hour = 0;
var minute = 0;
var second = 0;
var licenseCount = 0;
var buildType = 0;
IntPtr hIcon;
// String placeholders
using (var shSerailNumber = new StringHolder())
using (var shLicenseTitle = new StringHolder())
using (var shProductLicense = new StringHolder())
{
// Get ON_wString pointers
var pSerialNumber = shSerailNumber.NonConstPointer();
var pLicenseTitle = shLicenseTitle.NonConstPointer();
var pProductLicense = shProductLicense.NonConstPointer();
hIcon = UnsafeNativeMethods.RHC_ExtractLicenseData(_validator,
ref year,
ref month,
ref day,
ref hour,
ref minute,
ref second,
pSerialNumber,
ref licenseCount,
pLicenseTitle,
pProductLicense,
ref buildType);
// Copy ON_wString values to C# strings
licenseData.SerialNumber = shSerailNumber.ToString();
licenseData.LicenseTitle = shLicenseTitle.ToString();
licenseData.ProductLicense = shProductLicense.ToString();
}
// Set the expiration date using the C++ date data
if (year >= 2010)
{
licenseData.DateToExpire = new DateTime(year, month, day, hour, minute, second);
}
licenseData.LicenseCount = licenseCount;
licenseData.BuildType = (LicenseBuildType)buildType;
// Icon associated with the specified license type
if (hIcon != IntPtr.Zero)
{
// Create a new icon from the handle.
var newIcon = System.Drawing.Icon.FromHandle(hIcon);
// Set the LicenseData icon. Note, LicenseData creates it's own copy of the icon.
licenseData.ProductIcon = newIcon;
// When using Icon::FromHandle, you must dispose of the original icon by using the
// DestroyIcon method in the Win32 API to ensure that the resources are released.
DestroyIcon(newIcon.Handle);
}
return(ValidateResult.Success);
}
/// <summary>
/// Passed as a delegate to LicenseUtils.GetLicense(), will call the C++
/// ValidateProductKey() method then and copy CRhinoLicenseValidator C++
/// data to the LicenseData output object.
/// </summary>
/// <param name="productKey"></param>
/// <param name="licenseData">
/// Key information is coppied to this object
/// </param>
/// <returns></returns>
public ValidateResult ValidateProductKey(string productKey, out LicenseData licenseData)
{
// Create an empty LicenseData
licenseData = new LicenseData();
var rc = 0;
// Call back into the C++ unmanaged function pointer
if (IntPtr.Zero != _validator)
rc = UnsafeNativeMethods.RHC_ValidateProductKey(productKey, _validator);
if (rc != 1)
return (-1 == rc ? ValidateResult.ErrorHideMessage : ValidateResult.ErrorShowMessage);
// Copy unmanaged C++ validate data to the managed LicenseData
var year = 0;
var month = 0;
var day = 0;
var hour = 0;
var minute = 0;
var second = 0;
var licenseCount = 0;
var buildType = 0;
IntPtr hIcon;
// String placeholders
using (var shSerailNumber = new StringHolder())
using (var shLicenseTitle = new StringHolder())
using (var shProductLicense = new StringHolder())
{
// Get ON_wString pointers
var pSerialNumber = shSerailNumber.NonConstPointer();
var pLicenseTitle = shLicenseTitle.NonConstPointer();
var pProductLicense = shProductLicense.NonConstPointer();
hIcon = UnsafeNativeMethods.RHC_ExtractLicenseData(_validator,
ref year,
ref month,
ref day,
ref hour,
ref minute,
ref second,
pSerialNumber,
ref licenseCount,
pLicenseTitle,
pProductLicense,
ref buildType);
// Copy ON_wString values to C# strings
licenseData.SerialNumber = shSerailNumber.ToString();
licenseData.LicenseTitle = shLicenseTitle.ToString();
licenseData.ProductLicense = shProductLicense.ToString();
}
// Set the expiration date using the C++ date data
if (year >= 2010)
licenseData.DateToExpire = new DateTime(year, month, day, hour, minute, second);
licenseData.LicenseCount = licenseCount;
licenseData.BuildType = (LicenseBuildType)buildType;
// Icon associated with the specified license type
if (hIcon != IntPtr.Zero)
{
// Create a new icon from the handle.
var newIcon = System.Drawing.Icon.FromHandle(hIcon);
// Set the LicenseData icon. Note, LicenseData creates it's own copy of the icon.
licenseData.ProductIcon = newIcon;
// When using Icon::FromHandle, you must dispose of the original icon by using the
// DestroyIcon method in the Win32 API to ensure that the resources are released.
DestroyIcon(newIcon.Handle);
}
return ValidateResult.Success;
}
/// <summary>
/// Gets a copy of all (user key string, user value string) pairs attached to this geometry.
/// </summary>
/// <returns>A new collection.</returns>
internal System.Collections.Specialized.NameValueCollection _GetUserStrings()
{
System.Collections.Specialized.NameValueCollection rc = new System.Collections.Specialized.NameValueCollection();
IntPtr pThis = ConstPointer();
int count = 0;
IntPtr pUserStrings = UnsafeNativeMethods.ON_Object_GetUserStrings(pThis, ref count);
using( var keyHolder = new StringHolder() )
using( var valueHolder = new StringHolder() )
{
IntPtr pKeyHolder = keyHolder.NonConstPointer();
IntPtr pValueHolder = valueHolder.NonConstPointer();
for (int i = 0; i < count; i++)
{
UnsafeNativeMethods.ON_UserStringList_KeyValue(pUserStrings, i, true, pKeyHolder);
UnsafeNativeMethods.ON_UserStringList_KeyValue(pUserStrings, i, false, pValueHolder);
string key = keyHolder.ToString();
string value = valueHolder.ToString();
if (!string.IsNullOrEmpty(key) && !string.IsNullOrEmpty(value))
rc.Add(key, value);
}
}
if (IntPtr.Zero != pUserStrings)
UnsafeNativeMethods.ON_UserStringList_Delete(pUserStrings);
return rc;
}
/// <summary>
/// Gets user string from this geometry.
/// </summary>
/// <param name="key">id used to retrieve the string.</param>
/// <returns>string associated with the key if successful. null if no key was found.</returns>
internal string _GetUserString(string key)
{
IntPtr pThis = ConstPointer();
using (var sh = new StringHolder())
{
IntPtr pStringHolder = sh.NonConstPointer();
UnsafeNativeMethods.ON_Object_GetUserString(pThis, key, pStringHolder);
return sh.ToString();
}
}
