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 # Class FaceDrawHelper

 Last update: 16.07.2025 

Namespace: [VM.Managed.CAD](VM.Managed.CAD.md)  
Assembly: VMAppCore.dll

This class is to represent the draw face.

```csharp
public class FaceDrawHelper

```

#### Inheritance

[object](https://learn.microsoft.com/dotnet/api/system.object) ← [FaceDrawHelper](VM.Managed.CAD.FaceDrawHelper.md)

#### Extension Methods

[LinkPropertyItemCache.GetLinkProperties(object, LinkPropertyType)](VM.Models.Pre.Cache.LinkPropertyItemCache.md#VM_Models_Pre_Cache_LinkPropertyItemCache_GetLinkProperties_System_Object_VM_Models_Pre_LinkPropertyType_), [LinkPropertyItemCache.GetLinkPropertiesAndValues(object, LinkPropertyType)](VM.Models.Pre.Cache.LinkPropertyItemCache.md#VM_Models_Pre_Cache_LinkPropertyItemCache_GetLinkPropertiesAndValues_System_Object_VM_Models_Pre_LinkPropertyType_), [LinkPropertyItemCache.GetLinkedObjects<T>(object, LinkPropertyType)](VM.Models.Pre.Cache.LinkPropertyItemCache.md#VM_Models_Pre_Cache_LinkPropertyItemCache_GetLinkedObjects__1_System_Object_VM_Models_Pre_LinkPropertyType_)

## Methods

### DrawNurbs(\_SURFACENURBS\_INFO\*, Canvas)

```csharp
public static void DrawNurbs(_SURFACENURBS_INFO* info, Canvas canvas)

```

#### Parameters

`info` [\_SURFACENURBS\_INFO](VM.DSDL.API.GEOMETRY._SURFACENURBS_INFO.md)\*

`canvas` Canvas

### DrawNurbsBoundaryUsingPointQueryFunction(\_CURVENURBS\_INFO\*, Canvas, Face, uint)

```csharp
public static void DrawNurbsBoundaryUsingPointQueryFunction(_CURVENURBS_INFO* info, Canvas canvas, Face face, uint nIndex)

```

#### Parameters

`info` [\_CURVENURBS\_INFO](VM.DSDL.API.GEOMETRY._CURVENURBS_INFO.md)\*

`canvas` Canvas

`face` [Face](VM.Managed.CAD.Face.md)

`nIndex` [uint](https://learn.microsoft.com/dotnet/api/system.uint32)

### DrawNurbsUsingPointQueryFunction(\_SURFACENURBS\_INFO\*, Canvas, Face)

```csharp
public static void DrawNurbsUsingPointQueryFunction(_SURFACENURBS_INFO* info, Canvas canvas, Face face)

```

#### Parameters

`info` [\_SURFACENURBS\_INFO](VM.DSDL.API.GEOMETRY._SURFACENURBS_INFO.md)\*

`canvas` Canvas

`face` [Face](VM.Managed.CAD.Face.md)

### GetNurbsNormalDirection(\_SURFACENURBS\_INFO\*, ref VectorBase, ref VectorBase)

```csharp
public static void GetNurbsNormalDirection(_SURFACENURBS_INFO* info, ref VectorBase start, ref VectorBase normal)

```

#### Parameters

`info` [\_SURFACENURBS\_INFO](VM.DSDL.API.GEOMETRY._SURFACENURBS_INFO.md)\*

`start` [VectorBase](VM.Managed.VectorBase.md)

`normal` [VectorBase](VM.Managed.VectorBase.md)

### SetNurbsDrawUtil(INurbsDrawUtil\*)

Set nurbs surface information.

```csharp
public static void SetNurbsDrawUtil(INurbsDrawUtil* pNurbsDrawUtil)

```

#### Parameters

`pNurbsDrawUtil` [INurbsDrawUtil](VM.INurbsDrawUtil.md)\*

The nurbs surface information.