void ReadMap(String In)
{
Roids = new List <Roid>();
float x = 0.0f;
float y = 0.0f;
foreach (char c in In)
{
switch (c)
{
case '#':
Roid r = new Roid();
r.x = x;
r.y = y;
Roids.Add(r);
x += 1.0f;
break;
case '.':
x += 1.0f;
break;
case '\n':
y += 1.0f;
x = 0.0f;
break;
default:
break;
}
}
}
Roid Target(float angle, bool AngleMustBeLarger)
{
float mina = float.MaxValue;
float mindist = float.MaxValue;
Roid tr = null;
foreach (Roid r in Roids)
{
if (r == Station)
{
continue;
}
float a = r.a - angle;
if (a < 0)
{
a += 2.0f * (float)Math.PI;
}
if (AngleMustBeLarger && a <= 0.000001f)
{
continue;
}
if (a < mina || (a == mina && r.d < mindist))
{
mina = a;
mindist = r.d;
tr = r;
}
}
return(tr);
}
public void Part2()
{
CalcAngles();
float angle = 0.0f;
Roid r = Target(angle, false);
for (int a = 0; a < 199; a++)
{
angle = r.a;
Roids.Remove(r);
r = Target(angle, true);
}
Console.WriteLine("Day10 Part2 Result = {0}", r.x * 100 + r.y);
}
public void Part1()
{
ReadMap(InputData);
CalcCounts();
int maxvis = 0;
foreach (Roid r in Roids)
{
if (r.v > maxvis)
{
maxvis = r.v;
Station = r;
}
}
Console.WriteLine("Day10 Part1 Result = {0}", maxvis);
}
bool CanSee(Roid r1, Roid r2)
{
foreach (Roid rblock in Roids)
{
if (rblock == r1 || rblock == r2)
{
continue;
}
float dist2sq = (r2.x - r1.x) * (r2.x - r1.x) + (r2.y - r1.y) * (r2.y - r1.y);
float distbsq = (rblock.x - r1.x) * (rblock.x - r1.x) + (rblock.y - r1.y) * (rblock.y - r1.y);
if (distbsq <= dist2sq)
{
float dotp = ((r2.x - r1.x) * (rblock.x - r1.x)) + ((r2.y - r1.y) * (rblock.y - r1.y));
if (Math.Abs(dotp - Math.Sqrt(dist2sq) * Math.Sqrt(distbsq)) < 0.000001)
{
return(false);
}
}
}
return(true);
}
