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 # Interface IContactGeometry3D

 Last update: 16.07.2025 

Namespace: [VM.Managed.DAFUL](VM.Managed.DAFUL.md)  
Assembly: VMDFBase.dll

This interface is to represent the contact geometry 3 dimension.

```csharp
public interface IContactGeometry3D : IContactGeometry

```

#### Implements

[IContactGeometry](VM.Managed.DAFUL.IContactGeometry.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_)

## Properties

### HalfThickness

Gets or sets the half thickness.

```csharp
ExpressionValueVariable HalfThickness { get; set; }

```

#### Property Value

ExpressionValueVariable

### SurfaceSmoothingType

Gets or sets the type of the surface smoothing.

```csharp
SurfaceSmoothing SurfaceSmoothingType { get; set; }

```

#### Property Value

[SurfaceSmoothing](VM.Managed.DAFUL.SurfaceSmoothing.md)

## Methods

### GetPointDirectionOnGeometry(ref VectorBase, ref VectorBase)

Gets the point direction.

```csharp
bool GetPointDirectionOnGeometry(ref VectorBase point, ref VectorBase direction)

```

#### Parameters

`point` VectorBase

The point.

`direction` VectorBase

The direction.

#### Returns

[bool](https://learn.microsoft.com/dotnet/api/system.boolean)

`true` if success; otherwise, `false`.