## On this page

  

 

 # Class Canvas

 Last update: 16.07.2025 

Namespace: [VM.CAD.Kernel.Render](VM.CAD.Kernel.Render.md)  
Assembly: VM.CAD.Kernel.dll

```csharp
public sealed class Canvas : KernelObject, IDrawReference

```

#### Inheritance

[object](https://learn.microsoft.com/dotnet/api/system.object) ← [KernelObject](VM.CAD.Kernel.KernelObject.md) ← [Canvas](VM.CAD.Kernel.Render.Canvas.md)

#### Implements

[IDrawReference](VM.CAD.Kernel.Render.IDrawReference.md)

#### Inherited Members

[KernelObject.Dispose()](VM.CAD.Kernel.KernelObject.md#VM_CAD_Kernel_KernelObject_Dispose), [KernelObject.Key](VM.CAD.Kernel.KernelObject.md#VM_CAD_Kernel_KernelObject_Key)

#### 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

### BackplaneCull

Sets the back plane cull.

```csharp
public bool BackplaneCull { set; }

```

#### Property Value

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

### Color

Sets the color.

```csharp
public Color Color { set; }

```

#### Property Value

[Color](https://learn.microsoft.com/dotnet/api/system.drawing.color)

### Document

Gets the Document

```csharp
public IDocument3D Document { get; }

```

#### Property Value

IDocument3D

### LightInterpolationOption

Sets the light interpolation option.

```csharp
public LightInterpolationOptionType LightInterpolationOption { set; }

```

#### Property Value

[LightInterpolationOptionType](VM.CAD.Kernel.Render.LightInterpolationOptionType.md)

### LineShape

Sets the line shape.

```csharp
public LineType LineShape { set; }

```

#### Property Value

[LineType](VM.CAD.Kernel.Render.LineType.md)

### LineWeight

Sets the line weight.

```csharp
public double LineWeight { set; }

```

#### Property Value

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

### TextSize

Set the text size.

```csharp
public double TextSize { set; }

```

#### Property Value

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

### Transparency

Sets the transparency.

```csharp
public double Transparency { set; }

```

#### Property Value

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

### WireframeMode

Sets the wire frame mode.

```csharp
public bool WireframeMode { set; }

```

#### Property Value

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

## Methods

### AppendModellingMatrix(TMatrix)

Append modelling matrix.

```csharp
public void AppendModellingMatrix(TMatrix mat)

```

#### Parameters

`mat` TMatrix

The transformation matrix

### Clear()

Clear canvas.

```csharp
public void Clear()

```

### Create(IDocument3D, bool)

Create a new instance of the  class

```csharp
public static Canvas Create(IDocument3D doc, bool ThreadSafeCanvas = true)

```

#### Parameters

`doc` IDocument3D

The document

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

true if to create thread-safe canvas, otherwise false.

#### Returns

[Canvas](VM.CAD.Kernel.Render.Canvas.md)

### Create(UIntPtr, IDocument3D, bool)

Create a new instance of the  class

```csharp
public static Canvas Create(UIntPtr key, IDocument3D doc, bool ThreadSafeCanvas = true)

```

#### Parameters

`key` [UIntPtr](https://learn.microsoft.com/dotnet/api/system.uintptr)

The key of the canvas

`doc` IDocument3D

The document

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

true if to create thread-safe canvas, otherwise false.

#### Returns

[Canvas](VM.CAD.Kernel.Render.Canvas.md)

### DisplayTheFront(double)

Display front above all.

```csharp
public void DisplayTheFront(double dDepthRange = -1)

```

#### Parameters

`dDepthRange` [double](https://learn.microsoft.com/dotnet/api/system.double)

The depth range. If it is negative value, default value will be used.

### DrawArc(Vector, Vector, Vector)

Draw arc.

```csharp
public UIntPtr DrawArc(Vector vecFirst, Vector vecSecond, Vector vecThird)

```

#### Parameters

`vecFirst` Vector

The first point

`vecSecond` Vector

The second point

`vecThird` Vector

The third point

#### Returns

[UIntPtr](https://learn.microsoft.com/dotnet/api/system.uintptr)

### DrawArrow(Vector, Vector, double)

Draw arrow.

```csharp
public UIntPtr DrawArrow(Vector vecStart, Vector vecEnd, double dArrowSize = -1)

```

#### Parameters

`vecStart` Vector

The start point

`vecEnd` Vector

The end point

`dArrowSize` [double](https://learn.microsoft.com/dotnet/api/system.double)

The arrow size. If dArrowSize is negative or zero value, default value will be used.

#### Returns

[UIntPtr](https://learn.microsoft.com/dotnet/api/system.uintptr)

### DrawCircle(Vector, double, Vector, bool)

Draw circle.

```csharp
public UIntPtr DrawCircle(Vector vecCenter, double dRad, Vector vecNormal, bool bFill = false)

```

#### Parameters

`vecCenter` Vector

The center point

`dRad` [double](https://learn.microsoft.com/dotnet/api/system.double)

The radius

`vecNormal` Vector

The normal vector

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

The fill flag

#### Returns

[UIntPtr](https://learn.microsoft.com/dotnet/api/system.uintptr)

### DrawCylinder(Vector, Vector, double, bool, bool)

Draw cylinder.

```csharp
public UIntPtr DrawCylinder(Vector vecStart, Vector vecEnd, double dRad, bool bFirstCap = true, bool bSecondCap = true)

```

#### Parameters

`vecStart` Vector

The start point

`vecEnd` Vector

The end point

`dRad` [double](https://learn.microsoft.com/dotnet/api/system.double)

The radius

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

if first cap and second cap is true, "both"; if first cap is true and second cap is false, "first"; if first cap is false and second cap is true, "second"; if first cap and second cap is false, "none"

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

if first cap and second cap is true, "both"; if first cap is true and second cap is false, "first"; if first cap is false and second cap is true, "second"; if first cap and second cap is false, "none"

#### Returns

[UIntPtr](https://learn.microsoft.com/dotnet/api/system.uintptr)

### DrawCylinder(Vector, Vector, double, string)

Draw cylinder.

```csharp
public UIntPtr DrawCylinder(Vector vecStart, Vector vecEnd, double dRad, string strCapOption)

```

#### Parameters

`vecStart` Vector

The start point

`vecEnd` Vector

The end point

`dRad` [double](https://learn.microsoft.com/dotnet/api/system.double)

The radius

`strCapOption` [string](https://learn.microsoft.com/dotnet/api/system.string)

String specifying which ends to cap, either "first", "second", "none", or "both"

#### Returns

[UIntPtr](https://learn.microsoft.com/dotnet/api/system.uintptr)

### DrawDimension(Vector, string)

Draws the dimension.

```csharp
public UIntPtr DrawDimension(Vector vecCenter, string strText)

```

#### Parameters

`vecCenter` Vector

The center position.

`strText` [string](https://learn.microsoft.com/dotnet/api/system.string)

The string text.

#### Returns

[UIntPtr](https://learn.microsoft.com/dotnet/api/system.uintptr)

### DrawIcon(IconInfo)

Draw icon.

```csharp
public void DrawIcon(IconInfo iconInfo)

```

#### Parameters

`iconInfo` [IconInfo](VM.CAD.Kernel.Render.IconInfo.md)

The icon information

### DrawIcon(IconInfo, double)

Draw icon.

```csharp
public void DrawIcon(IconInfo iconInfo, double dScale)

```

#### Parameters

`iconInfo` [IconInfo](VM.CAD.Kernel.Render.IconInfo.md)

The icon information

`dScale` [double](https://learn.microsoft.com/dotnet/api/system.double)

The scale

### DrawLine(Vector, Vector)

Draw line.

```csharp
public UIntPtr DrawLine(Vector vecStart, Vector vecEnd)

```

#### Parameters

`vecStart` Vector

The start point

`vecEnd` Vector

The end point

#### Returns

[UIntPtr](https://learn.microsoft.com/dotnet/api/system.uintptr)

### DrawMarker(Vector)

Draw marker.

```csharp
public UIntPtr DrawMarker(Vector vecCenter)

```

#### Parameters

`vecCenter` Vector

The center point

#### Returns

[UIntPtr](https://learn.microsoft.com/dotnet/api/system.uintptr)

### DrawMesh(int, int, ICollection<Vector>)

Draw mesh.

```csharp
public UIntPtr DrawMesh(int nRows, int nColumns, ICollection<Vector> points)

```

#### Parameters

`nRows` [int](https://learn.microsoft.com/dotnet/api/system.int32)

The rows numner

`nColumns` [int](https://learn.microsoft.com/dotnet/api/system.int32)

The columns number

`points` [ICollection](https://learn.microsoft.com/dotnet/api/system.collections.generic.icollection-1)&lt;Vector&gt;

The collection of points

#### Returns

[UIntPtr](https://learn.microsoft.com/dotnet/api/system.uintptr)

### DrawMesh(int, int, Vector\[\])

Draw mesh.

```csharp
public UIntPtr DrawMesh(int nRows, int nColumns, Vector[] points)

```

#### Parameters

`nRows` [int](https://learn.microsoft.com/dotnet/api/system.int32)

The rows numner

`nColumns` [int](https://learn.microsoft.com/dotnet/api/system.int32)

The columns number

`points` Vector\[\]

The array of points

#### Returns

[UIntPtr](https://learn.microsoft.com/dotnet/api/system.uintptr)

### DrawNurbs(int, int, int, int, ICollection&lt;Vector&gt;, ICollection&lt;float&gt;, ICollection&lt;float&gt;, ICollection&lt;float&gt;)

Draw nurbs.

```csharp
public UIntPtr DrawNurbs(int u_degree, int v_degree, int u_count, int v_count, ICollection<Vector> ctrlPts, ICollection<float> weights, ICollection<float> u_knots, ICollection<float> v_knots)

```

#### Parameters

`u_degree` [int](https://learn.microsoft.com/dotnet/api/system.int32)

Degree of the surface in the u direction

`v_degree` [int](https://learn.microsoft.com/dotnet/api/system.int32)

Degree of the surface in the v direction

`u_count` [int](https://learn.microsoft.com/dotnet/api/system.int32)

Number of valid control points in the u direction

`v_count` [int](https://learn.microsoft.com/dotnet/api/system.int32)

Number of valid control points in the v direction

`ctrlPts` [ICollection](https://learn.microsoft.com/dotnet/api/system.collections.generic.icollection-1)&lt;Vector&gt;

Vector of x-y-z triplets for the coordinates of the control points

`weights` [ICollection](https://learn.microsoft.com/dotnet/api/system.collections.generic.icollection-1)&lt;[float](https://learn.microsoft.com/dotnet/api/system.single)&gt;

Control point weights

`u_knots` [ICollection](https://learn.microsoft.com/dotnet/api/system.collections.generic.icollection-1)&lt;[float](https://learn.microsoft.com/dotnet/api/system.single)&gt;

Knot sequence in the u direction

`v_knots` [ICollection](https://learn.microsoft.com/dotnet/api/system.collections.generic.icollection-1)&lt;[float](https://learn.microsoft.com/dotnet/api/system.single)&gt;

Knot sequence in the v direction

#### Returns

[UIntPtr](https://learn.microsoft.com/dotnet/api/system.uintptr)

### DrawNurbs(int, int, int, int, Vector\[\], float\[\], float\[\], float\[\])

Draw nurbs.

```csharp
public UIntPtr DrawNurbs(int u_degree, int v_degree, int u_count, int v_count, Vector[] ctrlPts, float[] weights, float[] u_knots, float[] v_knots)

```

#### Parameters

`u_degree` [int](https://learn.microsoft.com/dotnet/api/system.int32)

Degree of the surface in the u direction

`v_degree` [int](https://learn.microsoft.com/dotnet/api/system.int32)

Degree of the surface in the v direction

`u_count` [int](https://learn.microsoft.com/dotnet/api/system.int32)

Number of valid control points in the u direction

`v_count` [int](https://learn.microsoft.com/dotnet/api/system.int32)

Number of valid control points in the v direction

`ctrlPts` Vector\[\]

Vector of x-y-z triplets for the coordinates of the control points

`weights` [float](https://learn.microsoft.com/dotnet/api/system.single)\[\]

Control point weights

`u_knots` [float](https://learn.microsoft.com/dotnet/api/system.single)\[\]

Knot sequence in the u direction

`v_knots` [float](https://learn.microsoft.com/dotnet/api/system.single)\[\]

Knot sequence in the v direction

#### Returns

[UIntPtr](https://learn.microsoft.com/dotnet/api/system.uintptr)

### DrawPolygon(ICollection&lt;Vector&gt;)

Draw polygon.

```csharp
public UIntPtr DrawPolygon(ICollection<Vector> colPoint)

```

#### Parameters

`colPoint` [ICollection](https://learn.microsoft.com/dotnet/api/system.collections.generic.icollection-1)&lt;Vector&gt;

#### Returns

[UIntPtr](https://learn.microsoft.com/dotnet/api/system.uintptr)

### DrawPolygon(Vector\[\])

Draw polygon.

```csharp
public UIntPtr DrawPolygon(Vector[] arPoint)

```

#### Parameters

`arPoint` Vector\[\]

The array of points

#### Returns

[UIntPtr](https://learn.microsoft.com/dotnet/api/system.uintptr)

### DrawPolyline(ICollection&lt;Vector&gt;)

Draw polyline.

```csharp
public UIntPtr DrawPolyline(ICollection<Vector> colPoint)

```

#### Parameters

`colPoint` [ICollection](https://learn.microsoft.com/dotnet/api/system.collections.generic.icollection-1)&lt;Vector&gt;

#### Returns

[UIntPtr](https://learn.microsoft.com/dotnet/api/system.uintptr)

### DrawPolyline(Vector\[\])

Draw polyline.

```csharp
public UIntPtr DrawPolyline(Vector[] arPoint)

```

#### Parameters

`arPoint` Vector\[\]

The array of points

#### Returns

[UIntPtr](https://learn.microsoft.com/dotnet/api/system.uintptr)

### DrawShell(ICollection&lt;Vector&gt;, ICollection&lt;int&gt;, double)

Draw shell.

```csharp
public UIntPtr DrawShell(ICollection<Vector> points, ICollection<int> connectivities, double dScale = 1)

```

#### Parameters

`points` [ICollection](https://learn.microsoft.com/dotnet/api/system.collections.generic.icollection-1)&lt;Vector&gt;

The collection of points.

`connectivities` [ICollection](https://learn.microsoft.com/dotnet/api/system.collections.generic.icollection-1)&lt;[int](https://learn.microsoft.com/dotnet/api/system.int32)&gt;

The collection of connectivities.

`dScale` [double](https://learn.microsoft.com/dotnet/api/system.double)

#### Returns

[UIntPtr](https://learn.microsoft.com/dotnet/api/system.uintptr)

### DrawShell(Vector\[\], int\[\], double)

Draw shell.

```csharp
public UIntPtr DrawShell(Vector[] points, int[] connectivities, double dScale = 1)

```

#### Parameters

`points` Vector\[\]

The array of points.

`connectivities` [int](https://learn.microsoft.com/dotnet/api/system.int32)\[\]

The array of connectivities.

`dScale` [double](https://learn.microsoft.com/dotnet/api/system.double)

#### Returns

[UIntPtr](https://learn.microsoft.com/dotnet/api/system.uintptr)

### DrawShellWithFaceNormal(ICollection&lt;Vector&gt;, ICollection&lt;int&gt;, ICollection&lt;Vector&gt;)

Draw shell with face normal.

```csharp
public UIntPtr DrawShellWithFaceNormal(ICollection<Vector> points, ICollection<int> connectivities, ICollection<Vector> faceNormals = null)

```

#### Parameters

`points` [ICollection](https://learn.microsoft.com/dotnet/api/system.collections.generic.icollection-1)&lt;Vector&gt;

The collection of points.

`connectivities` [ICollection](https://learn.microsoft.com/dotnet/api/system.collections.generic.icollection-1)&lt;[int](https://learn.microsoft.com/dotnet/api/system.int32)&gt;

The collection of connectivities.

`faceNormals` [ICollection](https://learn.microsoft.com/dotnet/api/system.collections.generic.icollection-1)&lt;Vector&gt;

The collection of face normal vectors.

#### Returns

[UIntPtr](https://learn.microsoft.com/dotnet/api/system.uintptr)

### DrawShellWithFaceNormal(Vector\[\], int\[\], Vector\[\])

Draw shell with face normal.

```csharp
public UIntPtr DrawShellWithFaceNormal(Vector[] points, int[] connectivities, Vector[] faceNormals = null)

```

#### Parameters

`points` Vector\[\]

The array of points.

`connectivities` [int](https://learn.microsoft.com/dotnet/api/system.int32)\[\]

The array of connectivities.

`faceNormals` Vector\[\]

The array of face normal vectors.

#### Returns

[UIntPtr](https://learn.microsoft.com/dotnet/api/system.uintptr)

### DrawShellWithVertexNormal(ICollection&lt;Vector&gt;, ICollection&lt;int&gt;, ICollection&lt;Vector&gt;)

Draw shell with vertex normal.

```csharp
public UIntPtr DrawShellWithVertexNormal(ICollection<Vector> points, ICollection<int> connectivities, ICollection<Vector> vertexNormals = null)

```

#### Parameters

`points` [ICollection](https://learn.microsoft.com/dotnet/api/system.collections.generic.icollection-1)&lt;Vector&gt;

The collection of points.

`connectivities` [ICollection](https://learn.microsoft.com/dotnet/api/system.collections.generic.icollection-1)&lt;[int](https://learn.microsoft.com/dotnet/api/system.int32)&gt;

The collection of connectivities.

`vertexNormals` [ICollection](https://learn.microsoft.com/dotnet/api/system.collections.generic.icollection-1)&lt;Vector&gt;

The collection of vertex normal vectors.

#### Returns

[UIntPtr](https://learn.microsoft.com/dotnet/api/system.uintptr)

### DrawShellWithVertexNormal(Vector\[\], int\[\], Vector\[\])

Draw shell with vertex normal.

```csharp
public UIntPtr DrawShellWithVertexNormal(Vector[] points, int[] connectivities, Vector[] vertexNormals = null)

```

#### Parameters

`points` Vector\[\]

The array of points.

`connectivities` [int](https://learn.microsoft.com/dotnet/api/system.int32)\[\]

The array of connectivities.

`vertexNormals` Vector\[\]

The array of vertex normal vectors.

#### Returns

[UIntPtr](https://learn.microsoft.com/dotnet/api/system.uintptr)

### DrawSphere(Vector, double)

```csharp
public UIntPtr DrawSphere(Vector vecCenter, double dRad)

```

#### Parameters

`vecCenter` Vector

`dRad` [double](https://learn.microsoft.com/dotnet/api/system.double)

#### Returns

[UIntPtr](https://learn.microsoft.com/dotnet/api/system.uintptr)

### DrawSphere(Vector, double, Vector, Vector)

```csharp
public UIntPtr DrawSphere(Vector vecCenter, double dRad, Vector vecAxis, Vector vecOrtho)

```

#### Parameters

`vecCenter` Vector

`dRad` [double](https://learn.microsoft.com/dotnet/api/system.double)

`vecAxis` Vector

`vecOrtho` Vector

#### Returns

[UIntPtr](https://learn.microsoft.com/dotnet/api/system.uintptr)

### DrawText(Vector, string)

```csharp
public UIntPtr DrawText(Vector vecCenter, string strText)

```

#### Parameters

`vecCenter` Vector

`strText` [string](https://learn.microsoft.com/dotnet/api/system.string)

#### Returns

[UIntPtr](https://learn.microsoft.com/dotnet/api/system.uintptr)

### DrawWireCylinder(Vector, Vector, double)

Draw cylinder with face.

```csharp
public UIntPtr DrawWireCylinder(Vector vecStart, Vector vecEnd, double dRad)

```

#### Parameters

`vecStart` Vector

The start point

`vecEnd` Vector

The end point

`dRad` [double](https://learn.microsoft.com/dotnet/api/system.double)

The radius

#### Returns

[UIntPtr](https://learn.microsoft.com/dotnet/api/system.uintptr)

### DrawWireSphere(Vector, double)

```csharp
public UIntPtr DrawWireSphere(Vector vecCenter, double dRad)

```

#### Parameters

`vecCenter` Vector

`dRad` [double](https://learn.microsoft.com/dotnet/api/system.double)

#### Returns

[UIntPtr](https://learn.microsoft.com/dotnet/api/system.uintptr)

### DrawWireSphere(Vector, double, Vector, Vector)

```csharp
public UIntPtr DrawWireSphere(Vector vecCenter, double dRad, Vector vecAxis, Vector vecOrtho)

```

#### Parameters

`vecCenter` Vector

`dRad` [double](https://learn.microsoft.com/dotnet/api/system.double)

`vecAxis` Vector

`vecOrtho` Vector

#### Returns

[UIntPtr](https://learn.microsoft.com/dotnet/api/system.uintptr)

### EndGeometryEdit()

End geometry for edit.

```csharp
public void EndGeometryEdit()

```

### FastDrawShell(UIntPtr, ulong, UIntPtr, ulong, double)

Draw shell (fast).

```csharp
public void FastDrawShell(UIntPtr points, ulong nPoints, UIntPtr connectivities, ulong nConnectivities, double dScale)

```

#### Parameters

`points` [UIntPtr](https://learn.microsoft.com/dotnet/api/system.uintptr)

The points array

`nPoints` [ulong](https://learn.microsoft.com/dotnet/api/system.uint64)

The number of points

`connectivities` [UIntPtr](https://learn.microsoft.com/dotnet/api/system.uintptr)

The connectivities array

`nConnectivities` [ulong](https://learn.microsoft.com/dotnet/api/system.uint64)

The number of connectivities

`dScale` [double](https://learn.microsoft.com/dotnet/api/system.double)

The scale

### FastDrawShellWithFaceNormal(UIntPtr, ulong, UIntPtr, ulong)

Draw shell with face normal (fast).

```csharp
public void FastDrawShellWithFaceNormal(UIntPtr points, ulong nPoints, UIntPtr connectivities, ulong nConnectivities)

```

#### Parameters

`points` [UIntPtr](https://learn.microsoft.com/dotnet/api/system.uintptr)

The points array

`nPoints` [ulong](https://learn.microsoft.com/dotnet/api/system.uint64)

The number of points

`connectivities` [UIntPtr](https://learn.microsoft.com/dotnet/api/system.uintptr)

The connectivities array

`nConnectivities` [ulong](https://learn.microsoft.com/dotnet/api/system.uint64)

The number of connectivities

### GetExtension&lt;T&gt;()

Get canvas extension

```csharp
public T GetExtension<T>() where T : KernelExtension

```

#### Returns

T

The canvas extension

#### Type Parameters

`T`

The type of the canvas extension

### GetExtension&lt;T&gt;(string)

Get canvas extension

```csharp
public T GetExtension<T>(string strExtensionName) where T : KernelExtension

```

#### Parameters

`strExtensionName` [string](https://learn.microsoft.com/dotnet/api/system.string)

The name of the canvas extension.

#### Returns

T

The canvas extension

#### Type Parameters

`T`

The type of the canvas extension

### GetSubCanvas(string)

Get sub canvas.

```csharp
public Canvas GetSubCanvas(string strCanvasName)

```

#### Parameters

`strCanvasName` [string](https://learn.microsoft.com/dotnet/api/system.string)

The canvas name

#### Returns

[Canvas](VM.CAD.Kernel.Render.Canvas.md)

### IgnoreDepthTest()

Ignore depth test.

```csharp
public void IgnoreDepthTest()

```

### SetMarkerSymbol(MarkerType, double)

Set marker symbol.

```csharp
public void SetMarkerSymbol(MarkerType type, double dSize = -1)

```

#### Parameters

`type` [MarkerType](VM.CAD.Kernel.Render.MarkerType.md)

`dSize` [double](https://learn.microsoft.com/dotnet/api/system.double)

The marker size. If it is negative value, default value will be used.

### SetModellingMatrix(TMatrix)

Set modelling matrix.

```csharp
public void SetModellingMatrix(TMatrix mat)

```

#### Parameters

`mat` TMatrix

The transformation matrix

### SetScale(double, double, double)

Set scale.

```csharp
public void SetScale(double dX, double dY, double dZ)

```

#### Parameters

`dX` [double](https://learn.microsoft.com/dotnet/api/system.double)

The X coordinate of scale

`dY` [double](https://learn.microsoft.com/dotnet/api/system.double)

The Y coordinate of scale

`dZ` [double](https://learn.microsoft.com/dotnet/api/system.double)

The Z coordinate of scale

### SetWireframeMode(bool, bool)

Set wireframe mode.

```csharp
public void SetWireframeMode(bool bWireframe, bool bVisibleEdge)

```

#### Parameters

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

Whether use wire frame mode

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

Whether visible edge

### StartGeometryEdit(UIntPtr)

Start geometry for edit.

```csharp
public void StartGeometryEdit(UIntPtr pKeyGeom)

```

#### Parameters

`pKeyGeom` [UIntPtr](https://learn.microsoft.com/dotnet/api/system.uintptr)

The geometry key

### TrimNurbs(int, int, ICollection&lt;Vector&gt;, ICollection&lt;float&gt;, ICollection&lt;float&gt;, double, double)

Trim nurbs.

```csharp
public void TrimNurbs(int degree, int cpcount, ICollection<Vector> ctrlPts, ICollection<float> weights, ICollection<float> knots, double start_u, double end_u)

```

#### Parameters

`degree` [int](https://learn.microsoft.com/dotnet/api/system.int32)

Degree of the curve

`cpcount` [int](https://learn.microsoft.com/dotnet/api/system.int32)

Number of valid points in control\_points

`ctrlPts` [ICollection](https://learn.microsoft.com/dotnet/api/system.collections.generic.icollection-1)&lt;Vector&gt;

The points

`weights` [ICollection](https://learn.microsoft.com/dotnet/api/system.collections.generic.icollection-1)&lt;[float](https://learn.microsoft.com/dotnet/api/system.single)&gt;

Control point weights

`knots` [ICollection](https://learn.microsoft.com/dotnet/api/system.collections.generic.icollection-1)&lt;[float](https://learn.microsoft.com/dotnet/api/system.single)&gt;

Knot sequence

`start_u` [double](https://learn.microsoft.com/dotnet/api/system.double)

Start parameter

`end_u` [double](https://learn.microsoft.com/dotnet/api/system.double)

End parameter

### TrimNurbs(int, int, Vector\[\], float\[\], float\[\], double, double)

Trim nurbs.

```csharp
public void TrimNurbs(int degree, int cpcount, Vector[] ctrlPts, float[] weights, float[] knots, double start_u, double end_u)

```

#### Parameters

`degree` [int](https://learn.microsoft.com/dotnet/api/system.int32)

Degree of the curve

`cpcount` [int](https://learn.microsoft.com/dotnet/api/system.int32)

Number of valid points in control\_points

`ctrlPts` Vector\[\]

The points

`weights` [float](https://learn.microsoft.com/dotnet/api/system.single)\[\]

Control point weights

`knots` [float](https://learn.microsoft.com/dotnet/api/system.single)\[\]

Knot sequence

`start_u` [double](https://learn.microsoft.com/dotnet/api/system.double)

Start parameter

`end_u` [double](https://learn.microsoft.com/dotnet/api/system.double)

End parameter