> For the complete documentation index, see [llms.txt](https://doc.realvirtual.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.realvirtual.io/components-and-scripts/defining-logic/unity-scripting.md).

# Unity Scripting

Programming Unity with C#

Unity Scripting is done with C# scripts. All realvirtual.io functionality is done based on C# Scripting. The possibilities are endless. As an editor you need to have a C# editor like Visual Studio or Rider installed. You can find a lot of information about C# and C# scripting on the Internet. For a full documentation of the Unity API please go to this page:

{% embed url="<https://docs.unity3d.com/Manual/ScriptingSection.html>" %}

If you are already a programmer you might prefer to use C# scripts instead of the visual scripting approaches like [Logicsteps](/components-and-scripts/defining-logic/logicsteps.md), [Unity Visual Scripting](/components-and-scripts/defining-logic/unity-visual-scripting.md) or [https://github.com/game4automation/doc/blob/doc/components-and-scripts/defining-logic/broken-reference/README.md](https://github.com/game4automation/doc/blob/doc/components-and-scripts/defining-logic/broken-reference/README.md "mention").

## Installation of Visual Studio, Rider or another Scripting environment

Before scripting in C# you need to install Visual Studio or Rider. Please check the documentation on the Unity website about installing Visual Studio:

{% embed url="<https://docs.unity3d.com/Manual/VisualStudioIntegration.html>" %}

{% hint style="info" %}
Please make sure, that your scripting environment is linked as external tool like shown below:
{% endhint %}

<figure><img src="https://260262196-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FpYxFg97YnJX96UzNNTSd%2Fuploads%2Fgit-blob-588a1c694d9833079cd01a2f802b7876a9b69dc5%2FVS-external-tools.png?alt=media" alt=""><figcaption></figcaption></figure>

## Scripting realvirtual.io with C\#

Most important thing is, if you wan to use realvirtual.io classes and properties, to embed it by putting this using in front of your code (or alternatively put your code into the

`using game4automation;`

Here is a small example of a PLC like script for controlling a Drive based on a Sensor:

```csharp
    using realvirtual;
    using UnityEngine;
    
    //! PLC Script for the game4automation demo model
    public class PLC_CanConveyor : ControlLogic
    {
        public bool On = true;

        [Header("References")] public PLCOutputBool StartConveyor;
        public PLCInputBool SensorOccupied;
        public PLCInputBool ButtonConveyorOn;
        public PLCOutputBool LampCanAtPosition;

        // Call this when all Updates are done
        void FixedUpdate()
        {

            if (SensorOccupied.Value == false && On && ButtonConveyorOn.Value == true)
            {
                StartConveyor.Value = true;
            }
            else
            {
                StartConveyor.Value = false;
            }

            LampCanAtPosition.Value = SensorOccupied.Value;
        }
    }

```


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