What is the difference between System.Drawing.Point and System.Drawing.PointF

What is the differ开发者_如何转开发ence between System.Drawing.Point and System.Drawing.PointF. Can you give an example between this two.

Thanks in advance.

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Point uses integer coordinates (int for X and Y).

PointF uses floating points (float for X and Y).

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I think PointF exists partly because System.Drawing.Graphics class supports transformation and anti-aliasing. For example, you can draw a line between discrete pixelx in anti-aliasing mode.

    private void Form1_Paint(object sender, PaintEventArgs e)
    {
        e.Graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
        Pen pen = Pens.Red;
        // draw two vertical line
        e.Graphics.DrawLine(pen, new Point(100, 100), new Point(100, 200));
        e.Graphics.DrawLine(pen, new Point(103, 100), new Point(103, 200));
        // draw a line exactly in the middle of those two lines
        e.Graphics.DrawLine(pen, new PointF(101.5f, 200.0f), new PointF(101.5f, 300.0f)); ;
    }

and it will look like

without PointF those functionalities will be limited.

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For Example,In some embedded systems,only support "System.Drawing.Point",you should create "PointF" Type by yourself .