protected PointerEvent CreatePointerEvent(PointerState state, Vector2 position)
{
if (state == PointerState.Down)
lastTouchPosition = position;
var pointerEvent = new PointerEvent(0, position, position - lastTouchPosition, new TimeSpan(), state, PointerType.Touch, true);
lastTouchPosition = position;
return pointerEvent;
}
/// <summary>
/// Determine input from a user from Pointer (Touch/Mouse).
/// It analyses the input from a user, and transform it to InputState using in the game, which is then returned.
/// </summary>
/// <returns></returns>
private InputState GetPointerInputState()
{
// Get new state of Pointer (Touch input)
if (Input.PointerEvents.Any())
{
var lastPointer = Input.PointerEvents.Last();
isPointerDown = lastPointer.State != PointerState.Up;
pointerState = lastPointer;
}
// If a user does not touch the screen, there is not input
if (!isPointerDown)
return InputState.None;
// Transform pointer's position from normorlize coordinate to virtual resolution coordinate
var resolution = new Vector2(GraphicsDevice.BackBuffer.Width, GraphicsDevice.BackBuffer.Height);
var virtualCoordinatePointerPosition = resolution * (pointerState.Position - new Vector2(0.0f));
// Get current position of the agent, since the origin of the sprite is at the center, region needs to be shifted to top-left
agentSpriteRegion.X = (int)VirtualCoordToPixel(Entity.Transform.Position.X) - agentSpriteRegion.Width / 2;
agentSpriteRegion.Y = (int)VirtualCoordToPixel(Entity.Transform.Position.Y) - agentSpriteRegion.Height / 2;
// Check if the touch position is in the x-axis region of the agent's sprite; if so, input is shoot
if (agentSpriteRegion.Left <= virtualCoordinatePointerPosition.X && virtualCoordinatePointerPosition.X <= agentSpriteRegion.Right)
return InputState.Shoot;
// Check if a pointer falls left or right of the screen, which would correspond to Run to the left or right respectively
return ((pointerState.Position.X) <= agentSpriteRegion.Center.X / resolution.X) ? InputState.RunLeft : InputState.RunRight;
}