private void picArea_MouseUp(object sender, MouseEventArgs e)
{
Pen p = new Pen(Color.Black);
if (line.Checked)
{
lastP = e.Location;
pointsArr.Add(lastP);
pic.DrawLine(p, firstP, lastP);
if (lineActions.SelectedIndex == 0)
{
PointF inter;
if (pointsArr.Count > 3)
{
inter = AT.Intersection(pointsArr[pointsArr.Count - 4],
pointsArr[pointsArr.Count - 3],
pointsArr[pointsArr.Count - 2],
pointsArr[pointsArr.Count - 1]);
}
else
{
inter = new PointF(float.MaxValue, float.MaxValue);
}
if (inter.X == float.MaxValue && inter.Y == float.MaxValue)
{
interOut.Text = "Нет пересечения";
}
else
{
interOut.Text = $"X: {inter.X} Y: {inter.Y}";
pic.FillEllipse(new SolidBrush(Color.Green), new Rectangle((int)inter.X - 2, (int)inter.Y - 2, 5, 5));
}
}
}
else if (dot.Checked)
{
lastP = e.Location;
pic.FillEllipse(new SolidBrush(Color.Red), new Rectangle((int)lastP.X, (int)lastP.Y, 4, 4));
}
else if (poly.Checked)
{
PointF oldLP;
if (pointsArr.Count == 1)
{
oldLP = firstP;
}
else
{
oldLP = lastP;
}
lastP = e.Location;
pointsArr.Add(lastP);
pic.DrawLine(p, oldLP, lastP);
}
picArea.Invalidate();
}
private void button2_Click(object sender, EventArgs e)
{
if (poly.Checked)
{
if (polyAcions.SelectedIndex == 0)
{
for (int i = 0; i < pointsArr.Count; i++)
{
pointsArr[i] = AT.Move(pointsArr[i], (int)dx.Value, (int)dy.Value);
}
pic.FillRectangle(new SolidBrush(Color.White), 0, 0, picArea.Width, picArea.Height);
for (int i = 0; i < pointsArr.Count - 1; i++)
{
pic.DrawLine(new Pen(Color.Black), pointsArr[i], pointsArr[i + 1]);
}
}
else if (polyAcions.SelectedIndex == 1)
{
PointF center = AT.PolygonCenter(pointsArr);
for (int i = 0; i < pointsArr.Count; i++)
{
pointsArr[i] = AT.Rotation(center, (int)angleVal.Value, pointsArr[i]);
}
pic.FillRectangle(new SolidBrush(Color.White), 0, 0, picArea.Width, picArea.Height);
for (int i = 0; i < pointsArr.Count - 1; i++)
{
pic.DrawLine(new Pen(Color.Black), pointsArr[i], pointsArr[i + 1]);
}
}
else if (polyAcions.SelectedIndex == 2)
{
PointF center = AT.PolygonCenter(pointsArr);
for (int i = 0; i < pointsArr.Count; i++)
{
pointsArr[i] = AT.Scaling(center, (double)dx.Value, (double)dy.Value, pointsArr[i]);
}
pic.FillRectangle(new SolidBrush(Color.White), 0, 0, picArea.Width, picArea.Height);
for (int i = 0; i < pointsArr.Count - 1; i++)
{
pic.DrawLine(new Pen(Color.Black), pointsArr[i], pointsArr[i + 1]);
}
}
}
else if (line.Checked)
{
if (lineActions.SelectedIndex == 2)
{
PointF center = new PointF((pointsArr[0].X + pointsArr[1].X) / 2, (pointsArr[0].Y + pointsArr[1].Y) / 2);
for (int i = 0; i < pointsArr.Count; i++)
{
pointsArr[i] = AT.Rotation(center, 90, pointsArr[i]);
}
pic.FillRectangle(new SolidBrush(Color.White), 0, 0, picArea.Width, picArea.Height);
for (int i = 0; i < pointsArr.Count - 1; i++)
{
pic.DrawLine(new Pen(Color.Black), pointsArr[i], pointsArr[i + 1]);
}
}
else if (lineActions.SelectedIndex == 3)
{
if (pointsArr.Count >= 3)
{
PointF dotPos = pointsArr.Last();
double res = (dotPos.X - pointsArr[pointsArr.Count - 2].X)
* (pointsArr[pointsArr.Count - 3].Y - pointsArr[pointsArr.Count - 2].Y)
- (dotPos.Y - pointsArr[pointsArr.Count - 2].Y)
* (pointsArr[pointsArr.Count - 3].X - pointsArr[pointsArr.Count - 2].X);
//!!! линию рисовать сверху вниз!!!
if (res < 0)
{
pointPositionInfo.Text = "Точка находится правее";
}
else if (res > 0)
{
pointPositionInfo.Text = "Точка находится левее";
}
else
{
pointPositionInfo.Text = "Точка находится на линии";
}
}
}
}
else if (dot.Checked)
{
if (polyAcions.SelectedIndex == 3)
{
CheckConvex(pointsArr[pointsArr.Count - 1]);
}
else if (polyAcions.SelectedIndex == 4)
{
CheckNonConvex(pointsArr[pointsArr.Count - 1]);
}
}
picArea.Invalidate();
}
