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add-layout-using-layout-builder.md

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uid input-system-layout-builder

Add a layout using Layout Builder

Finally, the Input System can also build layouts on the fly in code. This is useful for Device interfaces such as HID that supply descriptive information for each Device.

To build layouts dynamically in code, you can use the InputControlLayout.Builder API.

Here's the same layout from the previous examples constructed programmatically:

var builder = new InputControlLayout.Builder()
    .WithName("MyDevice")
    .WithFormat("MDEV");

builder.AddControl("button1")
    .WithLayout("Button")
    .WithByteOffset(0)
    .WithBitOffset(0);

builder.AddControl("button2")
    .WithLayout("Button")
    .WithByteOffset(0)
    .WithBitOffset(1);

builder.AddControl("dpad")
    .WithLayout("Dpad")
    .WithByteOffset(0)
    .WithBitOffset(2)
    .WithSizeInBits(4);

builder.AddControl("dpad/up")
    .WithByteOffset(-1)
    .WithBitOffset(2);

builder.AddControl("dpad/down")
    .WithByteOffset(-1)
    .WithBitOffset(3);

builder.AddControl("dpad/left")
    .WithByteOffset(-1)
    .WithBitOffset(4);

builder.AddControl("dpad/right")
    .WithByteOffset(-1)
    .WithBitOffset(5);

builder.AddControl("stick")
    .WithLayout("Stick")
    .WithByteOffset(4)
    .WithFormat("VEC2");

builder.AddControl("trigger")
    .WithLayout("Axis")
    .WithByteOffset(12)
    .WithFormat("BYTE");

var layout = builder.Build();