public void TargetNearest(List <Pickup> pickups)
{
Vector2 nearestTarget = pickups[0].CollisionRectangle.Center.ToVector2();
Pickup nearestPickup = pickups[0];
foreach (Pickup pickup in pickups)
{
float nearestDistance = Vector2.Distance(location, nearestTarget);
Vector2 newTarget = pickup.CollisionRectangle.Center.ToVector2();
float distance = Vector2.Distance(location, newTarget);
if (distance < nearestDistance)
{
nearestTarget = newTarget;
nearestPickup = pickup;
}
}
SetTarget(nearestTarget);
target = nearestPickup;
}
/// <summary>
/// Allows the game to run logic such as updating the world,
/// checking for collisions, gathering input, and playing audio.
/// </summary>
/// <param name="gameTime">Provides a snapshot of timing values.</param>
protected override void Update(GameTime gameTime)
{
if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed || Keyboard.GetState().IsKeyDown(Keys.Escape))
{
Exit();
}
// STUDENTS: get current mouse state and update teddy
MouseState mouse = Mouse.GetState();
teddy.Update(gameTime, mouse);
// check for right click started
if (mouse.RightButton == ButtonState.Pressed &&
rightButtonReleased)
{
rightClickStarted = true;
rightButtonReleased = false;
}
else if (mouse.RightButton == ButtonState.Released)
{
rightButtonReleased = true;
// if right click finished, add new pickup to list
if (rightClickStarted)
{
rightClickStarted = false;
// STUDENTS: add a new pickup to the end of the list of pickups
Vector2 pickupLocation = new Vector2(mouse.X - pickupSprite.Width / 2, mouse.Y - pickupSprite.Height / 2);
Pickup newPickup = new Pickup(pickupSprite, pickupLocation);
pickups.Add(newPickup);
// STUDENTS: if this is the first pickup in the list, set teddy target
//one pickup in pickups means this is the first pickup
if (pickups.Count == 1)
{
Rectangle pickupRect = pickups[0].CollisionRectangle;
teddy.SetTarget(pickupLocation);
}
}
}
// check for collision between collecting teddy and targeted pickup
if (teddy.Collecting &&
teddy.CollisionRectangle.Intersects(pickups[0].CollisionRectangle))
{
// STUDENTS: remove targeted pickup from list (it's always at location 0)
//RemoveAt method allows you to remove pickup using index
pickups.RemoveAt(0);
// STUDENTS: if there's another pickup to collect, set teddy target
// If not, clear teddy target and stop the teddy from collecting
if (pickups.Count > 0)
{
Rectangle pickupRect = pickups[0].CollisionRectangle;
Vector2 pickupLocation = new Vector2(pickupRect.X, pickupRect.Y);
teddy.SetTarget(pickupLocation);
}
else
{
teddy.ClearTarget();
teddy.Collecting = false;
}
}
base.Update(gameTime);
}
public void TargetNearest(List<Pickup> pickups)
{
Vector2 nearestTarget = pickups[0].CollisionRectangle.Center.ToVector2();
Pickup nearestPickup = pickups[0];
foreach (Pickup pickup in pickups)
{
float nearestDistance = Vector2.Distance(location, nearestTarget);
Vector2 newTarget = pickup.CollisionRectangle.Center.ToVector2();
float distance = Vector2.Distance(location, newTarget);
if (distance < nearestDistance)
{
nearestTarget = newTarget;
nearestPickup = pickup;
}
}
SetTarget(nearestTarget);
target = nearestPickup;
}