/// <summary>
/// Handles input, performs physics, and animates the player sprite.
/// </summary>
/// <remarks>
/// We pass in all of the input states so that our game is only polling the hardware
/// once per frame. We also pass the game's orientation because when using the accelerometer,
/// we need to reverse our motion when the orientation is in the LandscapeRight orientation.
/// </remarks>
public void Update(
GameTime gameTime,
KeyboardState keyboardState,
GamePadState gamePadState,
AccelerometerState accelState,
DisplayOrientation orientation)
{
GetInput(keyboardState, gamePadState, accelState, orientation);
ApplyPhysics(gameTime);
if (IsAlive && IsOnGround)
{
if (Math.Abs(Velocity.X) - 0.02f > 0)
{
sprite.PlayAnimation(runAnimation);
}
else
{
sprite.PlayAnimation(idleAnimation);
}
}
// Clear input.
movement = 0.0f;
isJumping = false;
}
/// <summary>
/// Gets player horizontal movement and jump commands from input.
/// </summary>
private void GetInput(
KeyboardState keyboardState,
GamePadState gamePadState,
AccelerometerState accelState,
DisplayOrientation orientation)
{
// Get analog horizontal movement.
movement = gamePadState.ThumbSticks.Left.X * MoveStickScale;
// Ignore small movements to prevent running in place.
if (Math.Abs(movement) < 0.5f)
{
movement = 0.0f;
}
// Move the player with accelerometer
if (Math.Abs(accelState.Acceleration.Y) > 0.10f)
{
// set our movement speed
movement = MathHelper.Clamp(-accelState.Acceleration.Y * AccelerometerScale, -1f, 1f);
// if we're in the LandscapeLeft orientation, we must reverse our movement
if (orientation == DisplayOrientation.LandscapeRight)
{
movement = -movement;
}
}
// If any digital horizontal movement input is found, override the analog movement.
if (gamePadState.IsButtonDown(Buttons.DPadLeft) ||
keyboardState.IsKeyDown(Keys.Left) ||
keyboardState.IsKeyDown(Keys.A))
{
movement = -1.0f;
}
else if (gamePadState.IsButtonDown(Buttons.DPadRight) ||
keyboardState.IsKeyDown(Keys.Right) ||
keyboardState.IsKeyDown(Keys.D))
{
movement = 1.0f;
}
// Check if the player wants to jump.
isJumping =
gamePadState.IsButtonDown(JumpButton) ||
keyboardState.IsKeyDown(Keys.Space) ||
keyboardState.IsKeyDown(Keys.Up) ||
keyboardState.IsKeyDown(Keys.W);
}