private void pictureBox1_Click(object sender, EventArgs e)
{
Graphics gr = DrawCanvas.CreateGraphics();
double x, y, prevX = 0, prevY = 0;
float a = 13, b = 7;
float offsetX = DrawCanvas.Size.Width / 2;
float offsetY = DrawCanvas
float angleStep = 0.5f;
for (float angle = 0; angle < 360; angle += angleStep)
{
x = (a + b) * Math.Cos(angle) - a * Math.Cos((a + b) * angle / a);
y = (a + b) * Math.Sin(angle) - a * Math.Sin((a + b) * angle / a);
if (angle > 0)
{
gr.DrawLine(new Pen(Color.Black), (float)prevX, (float)prevY, (float)x, (float)y);
}
prevX = x;
prevY = y;
}
}
private void ProceedButton_Click(object sender, EventArgs e)
{
Graphics gr = DrawCanvas.CreateGraphics();
gr.Clear(Color.White);
gr.TranslateTransform(DrawCanvas.Size.Width / 2.0f, DrawCanvas.Size.Height / 2.0f);
if (PointGrid.RowCount < 4)
{
MessageBox.Show("Not enough points to build a triangle");
return;
}
// Перебор всех треугольников
double minDiff = -1;
bool setup = false;
Triangle min = new Triangle();
for (int i = 0; i < PointGrid.RowCount - 1 && PointGrid[0, i] != null; i++)
{
for (int j = i; j < PointGrid.RowCount - 1 && PointGrid[0, j] != null; j++)
{
for (int k = j; k < PointGrid.RowCount - 1 && PointGrid[0, k] != null; k++)
{
bool success = true;
double val1 = S2R(PointGrid[0, i].Value, ref success);
double val2 = S2R(PointGrid[1, i].Value, ref success);
double val3 = S2R(PointGrid[0, j].Value, ref success);
double val4 = S2R(PointGrid[1, j].Value, ref success);
double val5 = S2R(PointGrid[0, k].Value, ref success);
double val6 = S2R(PointGrid[1, k].Value, ref success);
if (!success)
{
continue;
}
Vertex a = new Vertex(val1, val2, i);
Vertex b = new Vertex(val3, val4, j);
Vertex c = new Vertex(val5, val6, k);
Triangle triangle = new Triangle(a, b, c);
if (triangle.IsDegenerate)
{
continue;
}
double diff = triangle.CircumcircleArea - triangle.Area;
if (diff < minDiff || !setup)
{
setup = true;
minDiff = diff;
min = triangle;
}
}
}
}
if (setup)
{
ResultLabel.Text = min +
"\nTriange with minimum difference between circumircle and its own area.";
}
else
{
ResultLabel.Text = "No correct triangles found";
}
min.DrawFitting(DrawCanvas);
}