void DrawUpdatedPoints(GAAlgorithm alg)
{
pictureBox1.Image = GetImage(_maxX, _maxY, _scale, _points, alg);
// print calculated distance
label1.Text = string.Format("There are {0} G0 points, the {1}th generation with {2} times of mutation. Best value: {3}",
_points.Count, alg.CurrentGeneration, alg.MutationTimes, alg.BestValue);
}
// method that is called from the async GAAlgorithm long running task
void ReportProgress(GAAlgorithm alg)
{
// only update if 50 ms has passed
var timeNow = DateTime.Now;
if ((DateTime.Now - previousTime).Milliseconds <= 50)
{
return;
}
DrawUpdatedPoints(alg);
previousTime = timeNow;
}
public MainForm(frmPlotter plotter, List <IPoint> points, float maxX, float maxY)
{
//
// The InitializeComponent() call is required for Windows Forms designer support.
//
InitializeComponent();
_points = points;
this._maxX = maxX;
this._maxY = maxY;
this._plotter = plotter;
_alg = new GAAlgorithm(_points);
_scale = CalculateOptimalScale(maxX, maxY);
DrawInitialPoints();
}
static Bitmap GetImage(float maxX, float maxY, float scale, IList <IPoint> points, GAAlgorithm alg = null)
{
// constants
const int radius = 4;
const int MARGIN = 10;
var bitmap = new Bitmap((int)((maxX + MARGIN) * scale), (int)((maxY + MARGIN) * scale));
Graphics gfx = Graphics.FromImage(bitmap);
// set background
gfx.Clear(Color.White);
// define pens
var straightPen = new Pen(Color.Red, 1.0f);
straightPen.StartCap = LineCap.NoAnchor;
straightPen.EndCap = LineCap.ArrowAnchor;
var lastStraightPen = new Pen(Color.HotPink, 1.0f);
lastStraightPen.StartCap = LineCap.NoAnchor;
lastStraightPen.EndCap = LineCap.ArrowAnchor;
var lastBrush = new SolidBrush(lastStraightPen.Color);
var arcPen = new Pen(Color.Black, 0.5f);
var arcBrush = new SolidBrush(Color.Black);
IPoint firstLocation = null;
IPoint previousLocation = null;
IPoint currentLocation = null;
int TotalCount = 0;
if (alg != null)
{
TotalCount = alg.BestPath.Count;
}
else
{
TotalCount = points.Count;
}
for (int i = 0; i < TotalCount; i++)
{
if (alg != null)
{
currentLocation = (IPoint)points[alg.BestPath[i]];
}
else
{
currentLocation = (IPoint)points[i];
}
if (previousLocation != null)
{
// draw
gfx.FillEllipse(arcBrush, currentLocation.X * scale - radius, (maxY - currentLocation.Y) * scale - radius, radius * 2, radius * 2);
gfx.DrawLine(straightPen,
previousLocation.X * scale,
(maxY - previousLocation.Y) * scale,
currentLocation.X * scale,
(maxY - currentLocation.Y) * scale);
}
previousLocation = currentLocation;
}
// last line and circle
if (alg != null)
{
firstLocation = points[alg.BestPath[0]];
}
else
{
firstLocation = points[0];
}
// draw last circle back to first location
gfx.FillEllipse(lastBrush, firstLocation.X * scale - radius, (maxY - firstLocation.Y) * scale - radius, radius * 2, radius * 2);
// draw last line
gfx.DrawLine(lastStraightPen,
previousLocation.X * scale,
(maxY - previousLocation.Y) * scale,
firstLocation.X * scale,
(maxY - firstLocation.Y) * scale);
gfx.Flush();
gfx.Dispose();
// dispose pens
straightPen.Dispose();
lastStraightPen.Dispose();
lastBrush.Dispose();
arcPen.Dispose();
arcBrush.Dispose();
return(bitmap);
}
