如何画玫瑰花？

Question

我期待着用c#图形制作一个玫瑰花...以下是我试图实现的目标：Rosette

到目前为止，我这样做了：

Pen lapsi = new Pen(Color.Black, 3);

        Rectangle katrori = new Rectangle(250, 200, 200, 200);
        Rectangle katrori2 = new Rectangle(350, 200, 200, 200);
        Rectangle katrori3 = new Rectangle(150, 200, 200, 200);

        Rectangle katrori4 = new Rectangle(200, 110, 200, 200);
        Rectangle katrori5 = new Rectangle(200, 285, 200, 200);
        Rectangle katrori6 = new Rectangle(295, 110, 200, 200);
        Rectangle katrori7 = new Rectangle(300, 282, 200, 200);

        Graphics g = this.CreateGraphics();

        g.DrawEllipse(lapsi, katrori); //kryesor
        g.DrawEllipse(lapsi, katrori2); //djatht
        g.DrawEllipse(lapsi, katrori3); //majt
        g.DrawEllipse(lapsi, katrori4); //nalt-majt
        g.DrawEllipse(lapsi, katrori5); //posht-majt
        g.DrawEllipse(lapsi, katrori6); //nalt-djatht
        g.DrawEllipse(lapsi, katrori7);//posht djatht

到目前为止，我已经画了7个圆圈，但我只想展示中间包含玫瑰花的圆圈。如何去掉主循环外的那些多余的行..如果有人能给我几行代码，并向我展示如何做到这一点，我将不胜感激。

Answer 1

从中心圆的矩形开始，并按一定的百分比进行膨胀()。接下来，创建一个GraphicsPath()，并通过AddEllipse()使用膨胀的矩形向其添加一个椭圆。最后，使用SetClip()裁剪图形表面。这将阻止显示该椭圆之外的任何内容：

        Pen lapsi = new Pen(Color.Black, 3);

        Rectangle katrori = new Rectangle(250, 200, 200, 200);
        Rectangle katrori2 = new Rectangle(350, 200, 200, 200);
        Rectangle katrori3 = new Rectangle(150, 200, 200, 200);

        Rectangle katrori4 = new Rectangle(200, 110, 200, 200);
        Rectangle katrori5 = new Rectangle(200, 285, 200, 200);
        Rectangle katrori6 = new Rectangle(295, 110, 200, 200);
        Rectangle katrori7 = new Rectangle(300, 282, 200, 200);

        Graphics g = this.CreateGraphics();

        Rectangle clippingRectangle = new Rectangle(katrori.Location, katrori.Size);
        clippingRectangle.Inflate((int)(katrori.Width * .2), (int)(katrori.Width * .2));
        System.Drawing.Drawing2D.GraphicsPath GP  = new System.Drawing.Drawing2D.GraphicsPath();
        GP.AddEllipse(clippingRectangle);
        g.SetClip(GP);

        g.DrawEllipse(lapsi, katrori); //kryesor
        g.DrawEllipse(lapsi, katrori2); //djatht
        g.DrawEllipse(lapsi, katrori3); //majt
        g.DrawEllipse(lapsi, katrori4); //nalt-majt
        g.DrawEllipse(lapsi, katrori5); //posht-majt
        g.DrawEllipse(lapsi, katrori6); //nalt-djatht
        g.DrawEllipse(lapsi, katrori7);//posht djatht

        g.Dispose();

这是我剪好的玫瑰花：

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