# llGroundContour

*LSL function*

```lsl
vector vector llGroundContour(vector offset);
```

- `vector offset`: Offset relative to the prim's position, expressed in local coordinates.

- Returns: `vector`
- Energy: 10

Returns a [vector](https://wiki.secondlife.com/wiki/vector) that is the ground contour direction below the prim [position](/functions/llGetPos/) + **offset**. The contour is the direction of a contour line at that point, that is the direction in which there is no change in elevation.

```lsl title="How to use" frame="terminal"
vector result = llGroundContour(ZERO_VECTOR);
```

## Specification

This function is defined as:

```lsl
vector llGroundContour(vector offset)
{
    vector slope = llGroundSlope(offset);
    return <-slope.y, slope.x, 0.0>;
}
```

## History

Added in [SL 0.9.0](http://secondlife.wikia.com/wiki/Version_0.9.0)

## See also

### Functions

- [llGround](/functions/llGround/) — Gets the ground height
- [llGroundNormal](/functions/llGroundNormal/) — Gets the ground normal
- [llGroundSlope](/functions/llGroundSlope/) — Gets the ground slope

---

*Source: [LlGroundContour](https://wiki.secondlife.com/wiki/LlGroundContour) on the Second Life Wiki. Content from the Second Life Wiki articles LlGroundContour (revision 1194293, 2015-01-22) and Template:LSL Function/offset (revision 1169422, 2012-06-18), CC BY-SA 3.0.*

---

From lsl.dev: https://lsl.dev/functions/llGroundContour/