How can detect swipe on Unity3d just look image

Question

I found how to determine the touch on the top or bottom but I need more details. I showed in the picture what I need. Tell me what to look for.

Give me a hint please

Answer 1

Hi wrote this script untested hope it helps.

Edit : i did not searched before posting this answer but i think this answer is Better

public class GestureRecognizer : MonoBehaviour {

// Min length to detect the Swipe
public float MinSwipeLength = 5f;

private Vector2 _firstPressPos;
private Vector2 _secondPressPos;
private Vector2 _currentSwipe;

private Vector2 _firstClickPos;
private Vector2 _secondClickPos;
public enum Swipe {
            None,
            Up,
            Down,
            Left,
            Right,
            UpLeft,
            UpRight,
            DownLeft,
            DownRight
        };
public static Swipe SwipeDirection;
public float ReturnForce = 10f;

private void Update() {
    DetectSwipe();
}

public void DetectSwipe() {
    if ( Input.touches.Length > 0 ) {
        Touch t = Input.GetTouch( 0 );

        if ( t.phase == TouchPhase.Began ) {
            _firstPressPos = new Vector2( t.position.x, t.position.y );
        }

        if ( t.phase == TouchPhase.Ended ) {
            _secondPressPos = new Vector2( t.position.x, t.position.y );
            _currentSwipe = new Vector3( _secondPressPos.x - _firstPressPos.x, _secondPressPos.y - _firstPressPos.y );

            // Make sure it was a legit swipe, not a tap
            if ( _currentSwipe.magnitude < MinSwipeLength ) {
                SwipeDirection = Swipe.None;
                return;
            }

            _currentSwipe.Normalize();

            // Swipe up
            if ( _currentSwipe.y > 0 && _currentSwipe.x > -0.5f && _currentSwipe.x < 0.5f ) {
                SwipeDirection = Swipe.Up;
            }
                // Swipe down
            else if ( _currentSwipe.y < 0 && _currentSwipe.x > -0.5f && _currentSwipe.x < 0.5f ) {
                SwipeDirection = Swipe.Down;
            }
                // Swipe left
            else if ( _currentSwipe.x < 0 && _currentSwipe.y > -0.5f && _currentSwipe.y < 0.5f ) {
                SwipeDirection = Swipe.Left;
            }
                // Swipe right
            else if ( _currentSwipe.x > 0 && _currentSwipe.y > -0.5f && _currentSwipe.y < 0.5f ) {
                SwipeDirection = Swipe.Right;
            }
                // Swipe up left
            else if ( _currentSwipe.y > 0 && _currentSwipe.x < 0 ) {
                SwipeDirection = Swipe.UpLeft;
            }
                // Swipe up right
            else if ( _currentSwipe.y > 0 && _currentSwipe.x > 0 ) {
                SwipeDirection = Swipe.UpRight;
            }
                // Swipe down left
            else if ( _currentSwipe.y < 0 && _currentSwipe.x < 0 ) {
                SwipeDirection = Swipe.DownLeft;

                // Swipe down right
            } else if ( _currentSwipe.y < 0 && _currentSwipe.x > 0 ) {
                SwipeDirection = Swipe.DownRight;
            }
        }
    } else {
        if ( Input.GetMouseButtonDown( 0 ) ) {
            _firstClickPos = new Vector2( Input.mousePosition.x, Input.mousePosition.y );
        } else {
            SwipeDirection = Swipe.None;
            //Debug.Log ("None");
        }
        if ( Input.GetMouseButtonUp( 0 ) ) {
            _secondClickPos = new Vector2( Input.mousePosition.x, Input.mousePosition.y );
            _currentSwipe = new Vector3( _secondClickPos.x - _firstClickPos.x, _secondClickPos.y - _firstClickPos.y );

            // Make sure it was a legit swipe, not a tap
            if ( _currentSwipe.magnitude < MinSwipeLength ) {
                SwipeDirection = Swipe.None;
                return;
            }

            _currentSwipe.Normalize();

            //Swipe directional check
            // Swipe up
            if ( _currentSwipe.y > 0 && _currentSwipe.x > -0.5f && _currentSwipe.x < 0.5f ) {
                SwipeDirection = Swipe.Up;
                Debug.Log( "Up" );
            }
                // Swipe down
            else if ( _currentSwipe.y < 0 && _currentSwipe.x > -0.5f && _currentSwipe.x < 0.5f ) {
                SwipeDirection = Swipe.Down;
                Debug.Log( "Down" );
            }
                // Swipe left
            else if ( _currentSwipe.x < 0 && _currentSwipe.y > -0.5f && _currentSwipe.y < 0.5f ) {
                SwipeDirection = Swipe.Left;
                Debug.Log( "Left" );
            }
                // Swipe right
            else if ( _currentSwipe.x > 0 && _currentSwipe.y > -0.5f && _currentSwipe.y < 0.5f ) {
                SwipeDirection = Swipe.Right;
                Debug.Log( "right" );
            }     // Swipe up left
            else if ( _currentSwipe.y > 0 && _currentSwipe.x < 0 ) {
                SwipeDirection = Swipe.UpLeft;
                Debug.Log( "UpLeft" );

            }
                // Swipe up right
            else if ( _currentSwipe.y > 0 && _currentSwipe.x > 0 ) {
                SwipeDirection = Swipe.UpRight;
                Debug.Log( "UpRight" );

            }
                // Swipe down left
            else if ( _currentSwipe.y < 0 && _currentSwipe.x < 0 ) {
                SwipeDirection = Swipe.DownLeft;
                Debug.Log( "DownLeft" );
                // Swipe down right
            } else if ( _currentSwipe.y < 0 && _currentSwipe.x > 0 ) {
                SwipeDirection = Swipe.DownRight;
                Debug.Log( "DownRight" );
            }
        }
    }
}