public void Update(GameTime gameTime)
{
KeyboardState kState = Keyboard.GetState();
float dt = (float)gameTime.ElapsedGameTime.TotalSeconds;
if (healthTimer > 0)
{
healthTimer -= dt;
}
/// <summary>
/// this one liner is a better version of switch statement below.
/// Because "directions" is enum, so basically
/// it resolves to [0, 1, 2, 3]
/// </summary>
animSprite = animations[(int)direction];
//switch (direction)
//{
// case Dir.Down:
// animSprite = animations[0];
// break;
// case Dir.Up:
// animSprite = animations[1];
// break;
// case Dir.Left:
// animSprite = animations[2];
// break;
// case Dir.Right:
// animSprite = animations[3];
// break;
// default:
// break;
//}
// for stopping character to always moving
if (isMoving)
{
animSprite.Update(gameTime);
}
else
{
animSprite.SetFrame(1);
}
#region Changing direction
// every frame will be false and only if keys are down, it will be true
isMoving = false;
if (kState.IsKeyDown(Keys.Right))
{
direction = Dir.Right;
isMoving = true;
}
if (kState.IsKeyDown(Keys.Left))
{
direction = Dir.Left;
isMoving = true;
}
if (kState.IsKeyDown(Keys.Up))
{
direction = Dir.Up;
isMoving = true;
}
if (kState.IsKeyDown(Keys.Down))
{
direction = Dir.Down;
isMoving = true;
}
#endregion
if (isMoving)
{
// holding current player position at this particular moment
Vector2 tempPos = position;
switch (direction)
{
case Dir.Right:
tempPos.X += speed * dt;
if (!Obstacle.DidCollide(tempPos, radius))
{
position.X += speed * dt;
}
break;
case Dir.Left:
tempPos.X -= speed * dt;
if (!Obstacle.DidCollide(tempPos, radius))
{
position.X -= speed * dt;
}
break;
case Dir.Up:
tempPos.Y -= speed * dt;
if (!Obstacle.DidCollide(tempPos, radius))
{
position.Y -= speed * dt;
}
break;
case Dir.Down:
tempPos.Y += speed * dt;
if (!Obstacle.DidCollide(tempPos, radius))
{
position.Y += speed * dt;
}
break;
default:
break;
}
}
// this makes projectile shoot once only when Space key is pressed down
if (kState.IsKeyDown(Keys.Space) && kStateOld.IsKeyUp(Keys.Space))
{
Projectile.projectiles.Add(new Projectile(position, direction));
}
kStateOld = kState;
}
