//**********************************************************
//** methods:
//**********************************************************
public void Render(Skater skater)
{
var radius = skater.Mass * .9f;
_skaterShape.Radius = radius;
_skaterShape.Scale = new Vector2f(.6f, 1f);
_skaterShape.Rotation = skater.Angle;
_skaterShape.Origin = new Vector2f(radius, radius);
_skaterShape.Position = skater.Position;
_skaterShape.FillColor = Color.Blue;
_renderTarget.Draw(_skaterShape);
}
//**********************************************************
//** methods:
//**********************************************************
public void Update(Skater skater)
{
if (Keyboard.IsKeyPressed(Keyboard.Key.A))
{
skater.Angle -= (360f * Timer.DeltaTimeSeconds);
}
if (Keyboard.IsKeyPressed(Keyboard.Key.D))
{
skater.Angle += (360f * Timer.DeltaTimeSeconds);
}
var rad = MathUtils.DegreeToRadian(skater.Angle - 90);
var dir = new Vector2f(
(float)Math.Cos(rad),
(float)Math.Sin(rad)
);
var force = new Vector2f();
if (Keyboard.IsKeyPressed(Keyboard.Key.W))
{
force += dir * skater.Strength;
}
if (Keyboard.IsKeyPressed(Keyboard.Key.Space))
{
force += dir * 100f;
}
force += -(skater.Velocity.Normalize() * 100f);
var a = (force / skater.Mass);
skater.Acceleration = a;
skater.Velocity += a;
skater.Position += skater.Velocity;
}