> For the complete documentation index, see [llms.txt](https://game-kit-controller.gitbook.io/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://game-kit-controller.gitbook.io/docs/integrations/current-integrations/easy-build-system-ebs.md).
# Easy Build System (EBS)
## What is Easy Build System?
**Easy Build System** is an advanced building system, easy to use and expandable. Fast and powerful to suit all of your building needs in all your games, works on any platforms!
Designed to work out-of-the-box, it includes several components like scalable conditions and add-ons, sockets, physics, blueprints, skins, save and load... etc
Support three view modes first, third and top-down view, works with the new Unity Input System and XR. Extend it or to customize it to fit your exact needs, even if you aren't a programmer.
{% hint style="info" %}
You can find more information about **Easy Build System (EBS)**, it's documentation and also purchase it over on the [Unity Asset Store](https://assetstore.unity.com/packages/templates/systems/easy-build-system-v5-3-45394).
{% endhint %}
## Integration Steps
Follow these quick easy steps to integrate **Easy Build System** and **Game Kit Controller**.
### Step #1
Open the scene called "**\[Desktop] First Person - Modular Building Demo**" or any first person demo scenes in the EBS demos directory here: `Assets/Easy Build System/Demos & Add-Ons/Demos` and drop the GKC player prefab into the scene.
{% hint style="info" %}
If the EBS demos directory doesn't exist in your project, you'll need to import them via the EBS package importer *(Tools > Easy Build System > Package Importer > Import Demos & Add-Ons)*.
{% endhint %}
{% hint style="info" %}
The GKC player prefab is located here: \
\&#xNAN;***`Assets/Game Kit Controller/Prefabs/Player Controller/Player And Game Management.prefab`***
{% endhint %}
### Step #2
Next locate the `Easy Build System - Demo First Person Controller` EBA player controller GameObject in your project hierarchy and **disable it**.
### Step #3
Select the `Main Camera` child GameObject of the **Easy Build System - Demo First Person Controller** GameObject. Then locate the `Builder Behaviour` component and **copy it**.
### Step #4
Next up you want to locate the GKC `Main Camera` GameObject in your project hierarchy *(Player And Game Management > Player Camera > Pivot Camera Transform > Main Camera Transform > Main Camera)* and select the hamburger menu of an existing component, then press "**Paste Component As New**" to paste the `Builder Behaviour` component onto the GKC `Main Camera`.
### Step #5
Still on the GKC `Main Camera` GameObject, got to the bottom of the inspector and press "**Add Component**" then we're going to create a new script, so enter **`GKCInputBehaviour`** and then select "**Create and Add**".
Open the newly created **`GKCInputBehaviour.cs`** script in your preferred editor, **delete any existing content in the script so that it's empty**, and **paste in the code below**.
{% hint style="info" %}
You can also find a text copy of the **GKCInputBehaviour** script in "**Assets/Game Kit Controller/Documentation/Integrations**" in your project.
{% endhint %}
```csharp
using EasyBuildSystem.Features.Scripts.Core.Base.Builder;
using EasyBuildSystem.Features.Scripts.Core.Base.Builder.Enums;
using EasyBuildSystem.Features.Scripts.Core.Base.Manager;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.EventSystems;
public class GKCInputBehaviour : MonoBehaviour
{
#region Fields
public bool UseShortcuts = true;
public KeyCode BuilderPlacementModeKey = KeyCode.E;
public KeyCode BuilderDestructionModeKey = KeyCode.R;
public KeyCode BuilderEditionModeKey = KeyCode.T;
public KeyCode BuilderValidateModeKey = KeyCode.Mouse0;
public KeyCode BuilderCancelModeKey = KeyCode.Mouse1;
public int SelectedIndex { get; set; }
public bool buildModeEnabled = true;
#endregion
#region Methods
private void Update ()
{
if (!buildModeEnabled) {
return;
}
if (UseShortcuts) {
if (Input.GetKeyDown (BuilderPlacementModeKey))
BuilderBehaviour.Instance.ChangeMode (BuildMode.Placement);
if (Input.GetKeyDown (BuilderDestructionModeKey))
BuilderBehaviour.Instance.ChangeMode (BuildMode.Destruction);
if (Input.GetKeyDown (BuilderEditionModeKey))
BuilderBehaviour.Instance.ChangeMode (BuildMode.Edition);
if (BuilderBehaviour.Instance.CurrentMode != BuildMode.Placement)
UpdatePrefabSelection ();
if (Input.GetKeyDown (BuilderCancelModeKey))
BuilderBehaviour.Instance.ChangeMode (BuildMode.None);
}
if (BuilderBehaviour.Instance.CurrentMode == BuildMode.Placement) {
if (IsPointerOverUIElement ())
return;
if (Input.GetKeyDown (BuilderValidateModeKey))
BuilderBehaviour.Instance.PlacePrefab ();
float WheelAxis = Input.GetAxis ("Mouse ScrollWheel");
if (WheelAxis > 0)
BuilderBehaviour.Instance.RotatePreview (BuilderBehaviour.Instance.SelectedPrefab.RotationAxis);
else if (WheelAxis < 0)
BuilderBehaviour.Instance.RotatePreview (-BuilderBehaviour.Instance.SelectedPrefab.RotationAxis);
if (Input.GetKeyDown (BuilderCancelModeKey))
BuilderBehaviour.Instance.ChangeMode (BuildMode.None);
} else if (BuilderBehaviour.Instance.CurrentMode == BuildMode.Edition) {
if (IsPointerOverUIElement ())
return;
if (Input.GetKeyDown (BuilderValidateModeKey))
BuilderBehaviour.Instance.EditPrefab ();
if (Input.GetKeyDown (BuilderCancelModeKey))
BuilderBehaviour.Instance.ChangeMode (BuildMode.None);
} else if (BuilderBehaviour.Instance.CurrentMode == BuildMode.Destruction) {
if (IsPointerOverUIElement ())
return;
if (Input.GetKeyDown (BuilderValidateModeKey)) {
if (BuilderBehaviour.Instance.CurrentRemovePreview != null) {
BuilderBehaviour.Instance.DestroyPrefab ();
}
}
if (Input.GetKeyDown (BuilderCancelModeKey))
BuilderBehaviour.Instance.ChangeMode (BuildMode.None);
}
}
private void UpdatePrefabSelection ()
{
float WheelAxis = Input.GetAxis ("Mouse ScrollWheel");
if (WheelAxis > 0) {
if (SelectedIndex < BuildManager.Instance.Pieces.Count - 1)
SelectedIndex++;
else
SelectedIndex = 0;
} else if (WheelAxis < 0) {
if (SelectedIndex > 0)
SelectedIndex--;
else
SelectedIndex = BuildManager.Instance.Pieces.Count - 1;
}
if (SelectedIndex == -1)
return;
if (BuildManager.Instance.Pieces.Count != 0)
BuilderBehaviour.Instance.SelectPrefab (BuildManager.Instance.Pieces[SelectedIndex]);
}
///
/// Check if the cursor is above a UI element or if the circular menu is open.
///
private bool IsPointerOverUIElement ()
{
if (Cursor.lockState == CursorLockMode.Locked)
return false;
if (EventSystem.current == null)
return false;
PointerEventData EventData = new PointerEventData (EventSystem.current)
{
position = new Vector2 (Input.mousePosition.x, Input.mousePosition.y)
};
List Results = new List ();
EventSystem.current.RaycastAll (EventData, Results);
return Results.Count > 0;
}
public void setBuildModeEnabledState (bool state)
{
buildModeEnabled = state;
if (!buildModeEnabled) {
BuilderBehaviour.Instance.ChangeMode (BuildMode.None);
}
}
#endregion
}
```
Save the `GKCInputBehaviour.cs` script and return to Unity. You should now see something like the following:
### Step #6
Next we're going to link up the Player Mode that'll be used when the player wants to enter build mode.
First select the **`Player Controller`** GameObject in your project hierarchy and locate the "**Player Modes List**" in the "**Player States Manager**" component.
Now you need to create **two new events** in the player mode you want the player to have the ability to build in. We're going to use an existing one for this example called "**Simple Mode**", but you can add a new player mode, or use another existing one if you'd prefer.
Expand your selected mode and add a new event to the "**Activate Player Mode Event**" list and one to the "**Deactivate Player Mode Event**" list. The function for both new events should be set to **`GKCInputBehaviour.setBuildModeEnabledState`** - Now tick the checkbox in the "**Activate Player Mode Event**" list and leave the checkbox unticked in the "**Deactivate Player Mode Event**" list.
Finally drag the **`Main Camera`** GameObject into the object field in both events you just created.
{% hint style="success" %}
**That's it!** Game Kit Controller is now integrated with **Easy Build System (EBS)** in your project. Hit play and change the player mode *("H" key by default)* to the mode you added the events to above:partying\_face::raised\_hands:
Now if you'd excuse me, I have to go finish building my dream home that I'll never actually own in real life... but who needs real life when you can build anything you want in GKC!:hotel::sunrise\_over\_mountains::sunglasses:
{% endhint %}
{% hint style="info" %}
*Note: A future version of the Easy Build System and Game Kit Controller integration will allow deeper integration with other systems of GKC like the inventory.*
{% endhint %}