<cat>UI.Intro</cat> <title>UI Basics</title> There's 2 ways to make UI right now in S&box. You can either create Panels entirely through code, or you can use [Razor](ui-razor) to create panels with HTML and CSS that can also use C#. It is recommended to use [Razor](ui-razor). # Tips and Tricks - You can set Panel classes - See [Panel.SetClass](https://sbox.game/dev/api/Sandbox.UI.Panel/SetClass), and [Panel.BindClass](https://sbox.game/dev/api/Sandbox.UI.Panel/BindClass) - If a panel is not behaving as expected you can troubleshoot it using the 'UI Panels' inspector. Enable it in View > UI Panels <upload src="97/8dacf630b9f409d.png" size="32067" name="image.png" /> ## Scaling By default, UI is scaled based on 1080p. To change how scaling works, override your hud's `UpdateScale()` method as such: ```csharp using Sandbox; using Sandbox.UI; public class Hud : RootPanel { protected override void UpdateScale( Rect screenSize ) { // Completely disables scaling Scale = 1; } } ``` ## Drawing Polygons Example: ```csharp public class MyGUI : RootPanel⤶ { public override void DrawBackground(ref RenderState state) public class MyGui : Panel⤶ { public override void DrawBackground( ref RenderState state ) { // Obviously, don't declare this here every frame. But you get the idea. Span<Vertex> vertices = new Vertex[] {⤶ new Vertex( new Vector3( 100, 100 ), new Vector4( 0, 0, 0, 0 ), new Color32(255, 0, 0 ) ), new Vertex( new Vector3( 300, 100 ), new Vector4( 0, 0, 0, 0 ), new Color32(0, 255, 0 ) ), new Vertex( new Vector3( 300, 300 ), new Vector4( 0, 0, 0, 0 ), new Color32(0, 0, 255 ) ), // Obviously, don't declare this here every frame. But you get the idea. Span<Vertex> vertices = new Vertex[]⤶ { new Vertex( new Vector3( 100, 100 ), new Vector4( 0, 0, 0, 0 ), new Color32( 255, 0, 0 ) ), new Vertex( new Vector3( 300, 100 ), new Vector4( 0, 0, 0, 0 ), new Color32( 0, 255, 0 ) ), new Vertex( new Vector3( 300, 300 ), new Vector4( 0, 0, 0, 0 ), new Color32( 0, 0, 255 ) ),⤶ }; var attribs = new RenderAttributes(); attribs.Set( "Texture", Texture.White ); Graphics.Draw( vertices, 3, Material.UI.Basic, attribs, Graphics.PrimitiveType.Triangles ); }⤶ }⤶ ⤶ // Wrapper component so you can use this in the scene system.⤶ public class MyGuiComponent : PanelComponent⤶ {⤶ protected override void OnEnabled()⤶ {⤶ var gui = new MyGui();⤶ gui.Parent = Panel;⤶ } } ``` <upload src="b0cef/8dad4b74473f6ab.png" size="152528" name="image.png" />