private void StartClick(object obj, EventArgs e)
{
pen = new Pen(Color.Blue, 1);
brush = new SolidBrush(Color.Blue);
GraphPanel = CreateGraphics();
var point1 = new Geometry2D.Objects.Point(0, 0);
var point2 = new Geometry2D.Objects.Point(100, 100);
var point3 = new Geometry2D.Objects.Point(-100, -100);
var point4 = new Geometry2D.Objects.Point(100, 200);
var line1 = Geometry.LineByTwoPoints(point1, point2);
var pointm1 = Geometry.HomothethyOfPoint(point4, point1, 0.25);
var pointm2 = Geometry.HomothethyOfPoint(point4, point2, 0.25);
var pointm3 = Geometry.HomothethyOfPoint(point4, point3, 0.25);
var linem1 = Geometry.HomothethyOfLine(point4, line1, 0.25);
DrawPoint(point4);
pen = new Pen(Color.Red, 1);
brush = new SolidBrush(Color.Red);
DrawPoint(point1);
DrawPoint(point2);
DrawPoint(point3);
DrawLine(line1);
pen = new Pen(Color.Green, 1);
brush = new SolidBrush(Color.Green);
DrawPoint(pointm1);
DrawPoint(pointm2);
DrawPoint(pointm3);
DrawLine(linem1);
}
void DrawPoint(Geometry2D.Objects.Point point)
{
int X0, Y0;
X0 = Convert.ToInt32(Math.Round(point.X - 3 + right));
Y0 = Convert.ToInt32(Math.Round(point.Y - 3 + top));
GraphPanel.FillEllipse(brush, X0, Y0, 6, 6);
}
