Class Vector2Composite

A 2D planar motion vector computed from an up+down button pair and a left+right button pair.

Inheritance
Object
InputBindingComposite
InputBindingComposite<Vector2>
Vector2Composite
Inherited Members
Namespace: UnityEngine.InputSystem.Composites
Syntax
[DisplayStringFormat("{up}/{left}/{down}/{right}")]
public class Vector2Composite : InputBindingComposite<Vector2>
Remarks

This composite allows to grab arbitrary buttons from a device and arrange them in a D-Pad like configuration. Based on button presses, the composite will return a normalized direction vector (normalization can be turned off via mode).

Opposing motions cancel each other out. This means that if, for example, both the left and right horizontal button are pressed, the resulting horizontal movement value will be zero.

// Set up WASD style keyboard controls.
action.AddCompositeBinding("2DVector")
    .With("Up", "<Keyboard>/w")
    .With("Left", "<Keyboard>/a")
    .With("Down", "<Keyboard>/s")
    .With("Right", "<Keyboard>/d");

Fields

down

Binding for the button represents the down (that is, (0,-1)) direction of the vector.

Declaration
public int down
Field Value
Type Description
Int32
Remarks

This property is automatically assigned by the input system.

left

Binding for the button represents the left (that is, (-1,0)) direction of the vector.

Declaration
public int left
Field Value
Type Description
Int32
Remarks

This property is automatically assigned by the input system.

mode

How to synthesize a Vector2 from the values read from up, down, left, and right.

Declaration
public Vector2Composite.Mode mode
Field Value
Type Description
Vector2Composite.Mode

Determines how X and Y of the resulting Vector2 are formed from input values.
Remarks
var action = new InputAction();

// DigitalNormalized composite (the default). Turns gamepad left stick into
// control equivalent to the D-Pad.
action.AddCompositeBinding("2DVector(mode=0)")
    .With("up", "<Gamepad>/leftStick/up")
    .With("down", "<Gamepad>/leftStick/down")
    .With("left", "<Gamepad>/leftStick/left")
    .With("right", "<Gamepad>/leftStick/right");

// Digital composite. Turns gamepad left stick into control equivalent
// to the D-Pad except that diagonals will not be normalized.
action.AddCompositeBinding("2DVector(mode=1)")
    .With("up", "<Gamepad>/leftStick/up")
    .With("down", "<Gamepad>/leftStick/down")
    .With("left", "<Gamepad>/leftStick/left")
    .With("right", "<Gamepad>/leftStick/right");

// Analog composite. In this case results in setup that behaves exactly
// the same as leftStick already does. But you could use it, for example,
// to swap directions by binding "up" to leftStick/down and "down" to
// leftStick/up.
action.AddCompositeBinding("2DVector(mode=2)")
    .With("up", "<Gamepad>/leftStick/up")
    .With("down", "<Gamepad>/leftStick/down")
    .With("left", "<Gamepad>/leftStick/left")
    .With("right", "<Gamepad>/leftStick/right");

right

Binding for the button that represents the right (that is, (1,0)) direction of the vector.

Declaration
public int right
Field Value
Type Description
Int32
Remarks

This property is automatically assigned by the input system.

up

Binding for the button that represents the up (that is, (0,1)) direction of the vector.

Declaration
public int up
Field Value
Type Description
Int32
Remarks

This property is automatically assigned by the input system.

Methods

EvaluateMagnitude(ref InputBindingCompositeContext)

Determine the current level of actuation of the composite.

Declaration
public override float EvaluateMagnitude(ref InputBindingCompositeContext context)
Parameters
Type Name Description
InputBindingCompositeContext context

Callback context for the binding composite. Use this to access the values supplied by part bindings.
Returns
Type Description
Single
Overrides
Remarks

This method by default returns -1, meaning that the composite does not support magnitudes. You can override the method to add support for magnitudes.

See EvaluateMagnitude() for details of how magnitudes work.

See Also

ReadValue(ref InputBindingCompositeContext)

Read a value for the composite given the supplied context.

Declaration
public override Vector2 ReadValue(ref InputBindingCompositeContext context)
Parameters
Type Name Description
InputBindingCompositeContext context

Callback context for the binding composite. Use this to access the values supplied by part bindings.
Returns
Type Description
Vector2

The current value of the composite according to the state made accessible through context.
Overrides
UnityEngine.InputSystem.InputBindingComposite<UnityEngine.Vector2>.ReadValue(UnityEngine.InputSystem.InputBindingCompositeContext)
Remarks

This is the main method to implement in custom composites.

public class CustomComposite : InputBindingComposite<float>
{
    [InputControl(layout = "Button")]
    public int button;

    public float scaleFactor = 1;

    public override float ReadValue(ref InputBindingComposite context)
    {
        return context.ReadValue<float>(button) * scaleFactor;
    }
}

The other method to consider overriding is EvaluateMagnitude(ref InputBindingCompositeContext).

See Also

See Also