private void UpdateEntity(MovingEntity entity, GameTime gameTime)
{
entity.Velocity += entity.SumOfForces / entity.Mass;
entity.Update(gameTime);
}
public static void Main(string[] args)
{
SeekSteeringBehavior seekSteeringBehavior = new SeekSteeringBehavior();
MovingEntity movingEntity = new MovingEntity
{
SteeringBehavior = seekSteeringBehavior,
Position = new Vector2(),
Velocity = new Vector2(),
MaxVelocity = 100,
Mass = 2,
};
Form form = new Form();
form.Text = "Seek Demo";
form.ClientSize = new Size(500, 500);
Stopwatch stopwatch = null;
long previousUpdate = 0;
double secsPerUpdateTick = 0d;
int updateTicksPerSec = 0;
form.Paint += (sender, e) =>
{
Graphics g = e.Graphics;
// TODO Make proper viewport transform.
g.TranslateTransform(250, 250);
if (stopwatch == null)
{
stopwatch = Stopwatch.StartNew();
}
long currentUpdate = stopwatch.ElapsedMilliseconds;
double deltaTimeS = (currentUpdate - previousUpdate) / 1000d;
if (deltaTimeS > secsPerUpdateTick)
{
movingEntity.Update(deltaTimeS);
previousUpdate = currentUpdate;
}
/**
* Draw calls.
*/
movingEntity.Draw(g);
form.Invalidate();
};
form.KeyDown += (s, e) =>
{
Console.WriteLine(e.KeyCode);
if (e.KeyCode == Keys.Escape)
{
Environment.Exit(0);
}
};
form.MouseClick += (s, e) =>
{
Vector2 clickPos = new Vector2(
e.X - form.ClientSize.Width / 2d,
-e.Y + form.ClientSize.Height / 2d);
Console.WriteLine($"Click! {clickPos}");
if (e.Button == MouseButtons.Left)
{
seekSteeringBehavior.Target = clickPos;
}
};
EnableDoubleBuffer(form);
Application.Run(form);
}