# adjacentStart

> Defines the position of a virtual point adjacent to the start vertex of an edge shape.

## Definition

* **Type:** Property
* **Namespace:** [UnityEngine](/engine/6000.7/script-reference/unityengine.md)
* **Assembly:** UnityEngine.Physics2DModule

```csharp
public Vector2 adjacentStart { get; set; }
```

### Remarks

An edge shape is comprised of multiple edge (line segments) defined by all its vertices. However, when a collision occurs with the start vertex of the shape then this vertex can be used to form a collision normal, and calculate the collision response. This allows for joining of individual edge shapes to produce a continuous collision surface.

This property is identical to [\_adjacentStartPoint](/engine/6000.7/script-reference/unityengine/edgecollider2d/adjacentstartpoint.md). It is only used when the [shapeType](/engine/6000.7/script-reference/unityengine/physicsshape2d/shapetype.md) is [PhysicsShapeType2D.Edges](/engine/6000.7/script-reference/unityengine/physicsshapetype2d/edges.md) and [useAdjacentStart](/engine/6000.7/script-reference/unityengine/physicsshape2d/useadjacentstart.md) is true.