//protected override void OnPaint(PaintEventArgs e)
//{
// Graphics graphics = PolygonPanel.CreateGraphics();
// Brush blackpen = new SolidBrush(Color.Black);
// Pen pen = new Pen(blackpen, 1);
// Point[] point = new Point[6];
// point[0] = polygon.PointOne;
// point[1] = polygon.PointTwo;
// point[2] = polygon.PointThree;
// point[3] = polygon.PointFour;
// point[4] = polygon.PointFive;
// point[5] = polygon.PointSix;
// graphics.DrawPolygon(pen,point);
// //base.OnPaint(e);
//}
protected override void OnPaint(PaintEventArgs e)
{
System.Drawing.Graphics graphics = PolygonPanel.CreateGraphics();
Brush blackpen = new SolidBrush(Color.Black);
Pen pen = new Pen(blackpen, 1);
Point[] point = new Point[6];
int cx = (int)circle.CentreX, cy = (int)circle.CentreX;
int R = (int)circle.Radius, N = 6;
for (int i = 0; i < 6; i++)
{
point[i].X = (int)(cx + R * Math.Cos(Math.PI / N * (1 + 2 * i)));
point[i].Y = (int)(cy + R * Math.Sin(Math.PI / N * (1 + 2 * i)));
}
graphics.DrawPolygon(pen, point);
//int cx = 550, cy = 550;
//int R = 100, N = 6;
//int[,] points = new int[6, 2];
//for (int i = 0; i < 6; i++)
//{
// points[i, 0] = (int)(cx + R * Math.Cos(Math.PI / N * (1 + 2 * i)));
// points[i, 1] = (int)(cy + R * Math.Sin(Math.PI / N * (1 + 2 * i)));
// //po
// //graphics.
// //base.OnPaint(e);
//}
}
private void ClearButton_Click(object sender, EventArgs e)
{
PolygonPanel.Invalidate();
_points = new List <PointF>();
_polygonTops = new List <Vertex>();
Coordinates.Text = string.Empty;
}
private void TriangulateButton_Click(object sender, EventArgs e)
{
Graphics g = PolygonPanel.CreateGraphics();
var polygon = new Polygon(_polygonTops);
var triangulator = new Triangulator(polygon);
polygon = triangulator.Triangulate();
int i = 0;
foreach (var triangle in polygon.Triangles)
{
int j = 0;
var points = new PointF[3];
foreach (Vertex top in triangle.Tops)
{
points[j] = new PointF((float)top.X, (float)top.Y);
j++;
}
g.DrawPolygon(new Pen(new SolidBrush(Color.Black), 2), points);
g.FillPolygon(new SolidBrush(_colorsForTriangles[i]), points);
i++;
i = i % 3 == 0 ? 0 : i;
foreach (var point in points)
{
g.FillEllipse(new SolidBrush(Color.Yellow), point.X - 3, point.Y - 3, 6, 6);
}
//var triangleCentroid = triangle.GetCentroidForTops();
//g.FillEllipse(new SolidBrush(Color.Black), (float)triangleCentroid.X - 3, (float)triangleCentroid.Y - 3, 6, 6);
}
// _polygonTops = new List<Vertex>();
}
private void PolygonPanel_MouseDown(object sender, MouseEventArgs e)
{
var point = new Point(e.X, e.Y);
var color = new SolidBrush(Color.Red);
Graphics g = PolygonPanel.CreateGraphics();
g.FillEllipse(color, point.X - 2.5f, point.Y - 2.5f, 5, 5);
_polygonTops.Add(new Vertex(point.X, point.Y));
Coordinates.Text += $"X: {e.X}, Y:{e.Y}\n";
if (_points.Count > 0)
{
g.DrawLine(new Pen(new SolidBrush(Color.Black)), point, _points.Last());
}
_points.Add(e.Location);
if (_points.Count >= 2)
{
TriangulateButton.Enabled = true;
}
}
private void TriangulateButton_Click(object sender, EventArgs e)
{
Graphics g = PolygonPanel.CreateGraphics();
var polygon = new Polygon(_polygonTops);
var triangulator = new Triangulator(polygon);
polygon = triangulator.Triangulate();
int i = 0;
foreach (var triangle in polygon.Triangles)
{
int j = 0;
var points = new PointF[3];
foreach (Vertex top in triangle.Tops)
{
points[j] = new PointF((float)top.X, (float)top.Y);
j++;
}
g.DrawPolygon(new Pen(new SolidBrush(Color.Black), 2), points);
g.FillPolygon(new SolidBrush(_colorsForTriangles[i]), points);
i++;
i = i % 3 == 0 ? 0 : i;
foreach (var point in points)
{
g.FillEllipse(new SolidBrush(Color.Yellow), point.X - 3, point.Y - 3, 6, 6);
}
var triangleCentroid = triangle.GetCentroidForTops();
g.FillEllipse(new SolidBrush(Color.Black), (float)triangleCentroid.X - 3, (float)triangleCentroid.Y - 3, 6, 6);
}
var centrForFrame = polygon.GetCentroidForFrame();
var centrForBody = polygon.GetCentroidForBody();
var centrForTops = polygon.GetCentroidForTops();
g.FillEllipse(new SolidBrush(Color.YellowGreen), (float)centrForTops.X - 7, (float)centrForTops.Y - 7, 14, 14);
g.FillEllipse(new SolidBrush(Color.Black), (float)centrForBody.X - 6, (float)centrForBody.Y - 6, 12, 12);
g.FillEllipse(new SolidBrush(Color.Violet), (float)centrForFrame.X - 5, (float)centrForFrame.Y - 5, 10, 10);
_polygonTops = new List <Vertex>();
}
