Beispiel #1
0
        public void calcAngle(AsteroidPoint source)
        {
            this.angle = GetAngle(source);

            if (source.x == this.x)
            {
                this.distance = Math.Abs(this.y - source.y);
            }
            else
            {
                this.distance = Math.Sqrt((Math.Pow((this.y - source.y) * 1.0, 2) + Math.Pow(this.x - source.x, 2)));
            }
        }
Beispiel #2
0
        public double GetAngle(AsteroidPoint source)
        {
            // Get the angle from the source point to this one
            // Need to convert to doubles before the slope calc
            double dy = (this.y - source.y) * 1.0;
            double dx = (this.x - source.x) * 1.0;

            // Convert to degrees and offset so 0 degrees is up
            // Swap the dy,dx parameters and rotate it
            double atan = Math.Atan2(dy, dx) * (180 / Math.PI) + 180 + 270;

            if (atan >= 360)
            {
                atan -= 360;
            }

            return(atan);
        }
Beispiel #3
0
        protected override string SolvePartTwo()
        {
            // Get the starting point from part 1
            AsteroidPoint source = this.map.Where(t => t.x == 28 && t.y == 29).First();

            // Remove from the list
            //this.map.Remove(source);

            // Set the angles
            this.map.ForEach(b => b.calcAngle(source));

            // List of angles to process
            List <double> angles = this.map.Where(t => t.asteroid == 1).Select(t => t.angle).OrderBy(t => t).Distinct().ToList();

            // We need to rotate through and figure out what to do with our lives
            int           vaporized    = 0;
            int           maxVaporized = 200;
            AsteroidPoint temp         = null;

            do
            {
                int i = 0;

                do
                {
                    // Is there a point to remove?
                    var t = this.map.Where(t => (t.x != source.x || t.y != source.y) && t.angle == angles[i] && t.asteroid == 1);

                    if (t.Count() > 0)
                    {
                        temp          = t.OrderBy(d => d.distance).First();
                        temp.asteroid = 0;

                        vaporized++;
                    }

                    i++;
                } while (i < angles.Count && vaporized < maxVaporized);
            } while (vaporized < maxVaporized);

            return($"Value: {((temp.x * 100) + temp.y).ToString("0000")}, x: {temp.x.ToString()}, y: {temp.y.ToString()}");
        }