相关疑难解决方法(0)

有一点绘图复杂,你会称之为.当谈到矩阵并在形状上绘制旋转时,我的数学有点生疏.这是一些代码:

private void Form1_Paint(object sender, PaintEventArgs e)
    {
        g = e.Graphics;
        g.SmoothingMode = SmoothingMode.HighQuality;
        DoRotation(e);
        g.DrawRectangle(new Pen(Color.Black), r1);
        g.DrawRectangle(new Pen(Color.Black), r2);

        // draw a line (PEN, CenterOfObject(X, Y), endpoint(X,Y) )
        g.DrawLine(new Pen(Color.Black), new Point((r1.X + 50), (r1.Y + 75)), new Point((/*r1.X + */50), (/*r1.Y - */25)));

        this.lblPoint.Text = "X-pos: " + r1.X + " Y-pos: " + r1.Y;

        //this.Invalidate();
    }
    public void DoRotation(PaintEventArgs e)
    {
        // move the rotation point to the center of object
        e.Graphics.TranslateTransform((r1.X + 50), (r1.Y + …