public Vector Rotate(double angle, Vector origin)
{
var delta = this - origin;
var dx = Math.Cos(angle) * delta.X - Math.Sin(angle) * delta.Y;
var dy = Math.Sin(angle) * delta.X + Math.Cos(angle) * delta.Y;
return new Vector(origin.X + dx, origin.Y + dy);
}
// p = start position
// v = start velocity
// a = acceleration
public static IEnumerable<Vector> Trace(Vector p, Vector v, Vector a, float mass = 1)
{
yield return p;
int dt = 10;
while (true)
{
Vector dv = a * (dt / mass);
p = p + v * dt;
p = p + dv * (dt / 2);
v = v + dv;
yield return p;
}
}
public static LineSegment FromVectors(Vector v1, Vector v2)
{
return new LineSegment(v1, v2);
}
public LineSegment(Vector v1, Vector v2)
: this()
{
this.V1 = v1;
this.V2 = v2;
}
private double computeOptimalAngle(Vector v)
{
var hw = Settings.Default.tankWidth / 2;
var vl = v - Vector.FromCart(hw, 0);
var vr = v + Vector.FromCart(hw, 0);
var dx = vr.X - v.X;
var dy = Landscape.fakeLandscape[Convert.ToInt32(vr.X)] - v.Y;
var alpha = Math.Atan2(dy, dx);
dx = v.X - vl.X;
dy = v.Y - Landscape.fakeLandscape[Convert.ToInt32(vl.X)];
var beta = Math.Atan2(dy, dx);
return (alpha + beta) / 2;
}