# fsMapViewSetWeatherRadarRainColors<no value>
This function can be used to set an array of colour structs which will then be used to draw the weather (when enabled). The colour struct at index 0 of the array will be used to colour rainfall from 0mm/h to the rate set for index 0, then the colour at index 1 will be used for rates between index 0 rate and index 1 rate, etc... up to a maximum rate of 100mm/h.

 

 

##### Syntax

``` wasm
bool fsMapViewSetWeatherRadarRainColors(
    FsContext ctx,
    FsTextureId id,
    FsRainRateColor* colors,
    unsigned nColors
    )
```

 

##### Members

{{< table-wrapper >}}

| Parameters | Description                                                                                                                                   |
|------------|-----------------------------------------------------------------------------------------------------------------------------------------------|
| `ctx`      | A value of type `FsContext` provided as an argument of the gauge callback.                                                                    |
| `id`       | The MapView render ID as returned by the function `fsMapViewCreate`.                                                                          |
| `colors`   | An array containing a minimum of 2 structs - comprised of an `FsColor` struct and a rate value (in mm/hour) - up to a maximum of 128 structs. |
| `nColors`  | The total size of the colour array.                                                                                                           |

{{< /table-wrapper >}}


 

##### Return Values

Returns false if:

-   `nColors` &lt; 2 or if `nColors` &gt; 128
-   no texture matches the given MapView ID
-   the `ctx` is invalid

Otherwise it will return true.

 

##### Remarks

The colors array is made up of at least 2 `FsColor` structs and would be created and used as shown in the following example:

``` wasm
const int size = 4;
FsRainRateColor colors[size] =
  {
    { { 1.f, 0.7f, 0.25f, 0.1f }, 0.2f},
    { { 0.7f, 0.2f, 0.63f, 0.88f }, 10.f},
    { { 0.8f, 0.3f, 0.7f, 0.62f }, 50.f},
    { { 0.f, 0.9f, 1.f, 1.f } 100.f}
  }
fsMapViewSetWeatherRadarRainColors(ctx, mapID, colors, size);
```