---
title: "Path.Smooth Method "
canonical: https://www.graphicsmill.com/docs/gm/M_Aurigma_GraphicsMill_Drawing_Path_Smooth_1_7a94462e.htm
archived: false
applies_to:
  - product: "Graphics Mill"
    versions: ["12.1", "6.x-12.x (may differ)"]
    entity_id: "https://www.graphicsmill.com/#software-application"
---

# Path.Smooth Method 

**Applies to:** Graphics Mill 12.1, 6.x-12.x (may differ)
 
Smooths every subpath of the path along its length.
 
**Namespace:** [Aurigma.GraphicsMill.Drawing](https://www.graphicsmill.com/docs/gm/N_Aurigma_GraphicsMill_Drawing.htm.md)
 **Assembly:** Aurigma.GraphicsMill (in Aurigma.GraphicsMill.dll)
 
## Syntax
  
```csharp
public void Smooth(float sigma
)
```
 
### Parameters
 
 - sigma
     - Type: System.Single
The standard deviation of the Gaussian smoothing, in path units. Must be greater than 0.
 
## Remarks
  
Corners become round over a distance of a few sigma. The ends of open subpaths stay in place. Curves are converted to polylines first.
 
Like any such smoothing, it moves a curve towards its center of curvature by about sigma \* sigma / (2 \* radius). So a convex outline shrinks a little.
 
## Examples
  
```csharp
// A five-pointed star.
var path = new Path();
for (int i = 0; i < 10; i++)
{
    double angle = i * System.Math.PI / 5 - System.Math.PI / 2;
    float radius = i % 2 == 0 ? 65 : 28;
    float x = 75 + radius * (float)System.Math.Cos(angle);
    float y = 80 + radius * (float)System.Math.Sin(angle);

    if (i == 0)
        path.MoveTo(x, y);
    else
        path.LineTo(x, y);
}
path.Close();

var original = new Path(path);

// Round off the corners.
path.Smooth(6f);
```
 
The original path and the smoothed path.
 ![The original path and the smoothed path.](https://www.graphicsmill.com/docs/gm/PathSmooth.png)
 
## Exceptions
  
|  Exception |  Condition |
| --- | --- |
 |  System.ArgumentOutOfRangeException |  The value is not greater than 0. |
   
## See Also

### Reference

- [Path Class](https://www.graphicsmill.com/docs/gm/T_Aurigma_GraphicsMill_Drawing_Path.htm.md)
- [Aurigma.GraphicsMill.Drawing Namespace](https://www.graphicsmill.com/docs/gm/N_Aurigma_GraphicsMill_Drawing.htm.md)

### Manual

- [Working with Paths](https://www.graphicsmill.com/docs/gm/working-with-path.htm.md)