private void drawProjectilePathPreview(PrimitiveGeometry geo)
{
var s = this.body.Shape;
var dVector = this.aimDirection.Vector;
var v = new Velocity2(dVector * 0.9f) + this.body.Velocity;
var p = s.Center + new Difference2(dVector * s.Radius.NumericValue * 1.5f);
geo.LineWidth = 0.05f;
geo.Color = Color.Gray;
for (int i = 0; i < 50; i++)
{
var acceleration = Vector2.Zero;
foreach (var body in this.game.Bodies)
{
var shape = body.Shape;
var difference = shape.Center - p;
var distanceSquared = difference.LengthSquared;
var a = Constants.G * body.Mass / distanceSquared.NumericValue;
var dirNormal = difference.Direction.Vector;
acceleration += dirNormal * a;
}
var speedFactor = Math.Min(0.5f / acceleration.Length.Sqrted(), 0.5f / v.Speed.NumericValue.Squared());
var t = TimeSpan.One * speedFactor;
v += new Velocity2(acceleration * (float)t.NumericValue);
var p2 = p + v * t;
geo.DrawLine(p.Vector, p2.Vector);
p = p2;
}
}
public void Draw(PrimitiveGeometry geo)
{
geo.Color = this.Color;
geo.DrawLine(this.From, this.To);
}