private void RotatePointButton_Click(object sender, EventArgs e)
{
ModelView.Image = new Bitmap(ModelView.Width, ModelView.Height);
Graphics g = Graphics.FromImage(ModelView.Image);
DrawAxisAndGrid();
double angle = Convert.ToInt32(RtPtAng.Text) * Math.PI / 180;
int x = Convert.ToInt32(RtPtX.Text);
int y = Convert.ToInt32(RtPtY.Text);
Types.Matrix matrix = new Types.Matrix(1, 0, 0,
0, 1, 0,
-x, -y, 1);
matrix = matrix.Multiple(new Types.Matrix(Math.Cos(angle), Math.Sin(angle), 0,
-Math.Sin(angle), Math.Cos(angle), 0,
0, 0, 1));
matrix = matrix.Multiple(new Types.Matrix(1, 0, 0,
0, 1, 0,
x, y, 1));
drawing.Transform(matrix);
drawing.Draw(g);
curve.Transform(matrix);
curve.Draw(g);
ModelView.Refresh();
}
public void Transform(Matrix T)
{
bool xneg, yneg;
Matrix rez;
for (int i = 0; i < lines.Count; i++)
{
xneg = false;
yneg = false;
lines[i].start.X -= _x;
lines[i].start.Y -= _y;
lines[i].end.X -= _x;
lines[i].end.Y -= _y;
//if (lines[i].end.X < 0)
//{
// lines[i].end.X = Math.Abs(lines[i].end.X);
// xneg = true;
//}
//if (lines[i].end.Y < 0)
//{
// lines[i].end.Y = Math.Abs(lines[i].end.Y);
// yneg = true;
//}
rez = new Matrix(lines[i].end.X, lines[i].end.Y, lines[i].we);
rez = rez.Multiple(T);
lines[i].we = (int)(rez.matrix[0, 2]);
lines[i].end.X = (int)(rez.matrix[0, 0] / lines[i].we);
lines[i].end.Y = (int)(rez.matrix[0, 1] / lines[i].we);
//if (xneg)
//{
// lines[i].end.X = Convert.ToInt32(("-" + lines[i].end.X.ToString()));
// xneg = false;
//}
//if (yneg)
//{
// lines[i].end.Y = Convert.ToInt32(("-" + lines[i].end.Y.ToString()));
// yneg = false;
//}
//if (lines[i].start.X < 0)
//{
// lines[i].start.X = Math.Abs(lines[i].start.X);
// xneg = true;
//}
//if (lines[i].start.Y < 0)
//{
// lines[i].start.Y = Math.Abs(lines[i].start.Y);
// yneg = true;
//}
rez = new Matrix(lines[i].start.X, lines[i].start.Y, lines[i].ws);
rez = rez.Multiple(T);
lines[i].ws = (int)(rez.matrix[0, 2]);
lines[i].start.X = (int)(rez.matrix[0, 0] / lines[i].ws);
lines[i].start.Y = (int)(rez.matrix[0, 1] / lines[i].ws);
//if (xneg)
//{
// lines[i].start.X = Convert.ToInt32(("-" + lines[i].start.X.ToString()));
// xneg = false;
//}
//if (yneg)
//{
// lines[i].start.Y = Convert.ToInt32(("-" + lines[i].start.Y.ToString()));
// yneg = false;
//}
lines[i].start.X += _x;
lines[i].start.Y += _y;
lines[i].end.X += _x;
lines[i].end.Y += _y;
}
}
