public void Move(GameTime gameTime)
{
if (Health <= 0)
{
return;
}
var timeElapsed = Math.Min(gameTime.ElapsedGameTime.Milliseconds / 1000f, 0.2f);
var movement = Velocity * timeElapsed;
mLastVelocities[mCurrentLastVelocitiesIndex] = Velocity;
mCurrentLastVelocitiesIndex++;
mCurrentLastVelocitiesIndex %= mLastVelocities.Length;
var averageVelocity = mLastVelocities.Aggregate(Vector2.Zero, (current, velocity) => current + velocity);
Position += movement;
if (CurrentQuadTree == null)
{
Position -= movement;
}
else
{
Position += QuadTree.ClampPosition(this);
CurrentQuadTree.UpdateGameObjectPosition(this);
}
if (Math.Abs(averageVelocity.Y) > 2 * Math.Abs(averageVelocity.X) && !mOnlyLeftRightDirection)
{
if (averageVelocity.Y > 0)
{
mDirection = (int)Directions.Down;
}
else
{
mDirection = (int)Directions.Up;
}
}
else if (2 * Math.Abs(averageVelocity.Y) < Math.Abs(averageVelocity.X))
{
if (averageVelocity.X > 0)
{
mDirection = (int)Directions.Right;
}
else
{
mDirection = (int)Directions.Left;
}
}
else
{
if (mDirection == (int)Directions.Down && averageVelocity.Y < 0 ||
mDirection == (int)Directions.Up && averageVelocity.Y > 0 ||
mDirection == (int)Directions.Right && averageVelocity.X < 0 ||
mDirection == (int)Directions.Left && averageVelocity.X > 0)
{
mDirection = (int)GetDirection(averageVelocity);
}
}
}
private List <ICollidable> GetCollidingObjects(Vector2 position)
{
return(CurrentQuadTree.GetCollidingObjects(this, position));
}
public override void Update(GameTime gameTime)
{
base.Update(gameTime);
mCollidingObjects.Clear();
mNeighborObjects = CurrentQuadTree.GetCollidingObjects(this, 1.5f);
foreach (var neighbor in mNeighborObjects)
{
if (neighbor is BGameObject obj && QuadTree.AreGameObjectsColliding(this, obj))
{
mCollidingObjects.Add(neighbor);
}
}
if (mRandomWalk && !HasPath && sRandom.NextDouble() < RandomWalkChance)
{
var distance = 0.5 + mRandomWalkDistance * sRandom.NextDouble();
var angle = sRandom.NextDouble() * Math.PI * 2;
var target = Position + new Vector2((float)(Math.Cos(angle) * distance),
(float)(Math.Sin(angle) * distance));
if (GetCollidingObjects(target).Count == 0)
{
RequestPath(CollisionBoxCenter + new Vector2((float)(Math.Cos(angle) * distance), (float)(Math.Sin(angle) * distance)), loose: true);
}
}
if (!FollowPath())
{
mSteering.UpdateSteering(CollisionBoxCenter, mNeighborObjects);
}
Velocity += mSteering.GetSteering();
float collisionFactor = mCollidingObjects.Any() || GetCollidingWaterTiles().Any() ? 2 : 1;
if (Velocity.Length() > Speed * collisionFactor)
{
if (Velocity != Vector2.Zero)
{
Velocity = Vector2.Normalize(Velocity);
}
Velocity *= Speed * collisionFactor;
}
if (!mLastHealthInitialized)
{
mLastHealth = Health;
mLastHealthInitialized = true;
}
if (mLastHealth - Health > 2 && !mShowBlood)
{
mBloodAnimation.Reset();
mShowBlood = true;
mBloodRotation = (float)(sRandom.NextDouble() * 2 * Math.PI);
mBloodOffset = new Vector2(Width / 64.0f, (float)sRandom.NextDouble() * Height / 32.0f);
mBloodScale = (float)sRandom.NextDouble() + 0.6f;
}
if (mBloodAnimation.AnimationFinished)
{
mShowBlood = false;
}
mBlood = mBloodAnimation.GetTextureOnce();
mLastHealth = Health;
}