如何在VB.NET中绘制圆弧 [英] How to draw circular arcs in VB.NET

问题描述

我必须根据用户输入的值生成下图.给定圆弧的起点和起点，我该如何绘制圆弧(如图中的B-C-F，本质上是圆形).端点(分别为B和F)和距段BF的高度?我可以进行一些几何计算得到半径&全部，但是如何绘制圆弧?

I have to generate the following figure according to user fed values. How do I go about drawing the arcs (B-C-F as in figure, circular in nature) given their start point & end point (B & F respectively) & the height from the segment BF? I can do some geometric calculations & get the radius & all, but how do I draw the arc?

我尝试使用Graphics.DrawCurve()方法，但是它没有按预期工作.如何使此方法适用于圆弧?也欢迎任何其他解决方法.

I have tried using the Graphics.DrawCurve() method, but it doesn't work as expected. How can I make this method work for circular arcs? Any other workaround is also welcome.

推荐答案

知道了！谢谢@Mitch& @Idle_Mind

Got it! Thanks @Mitch & @Idle_Mind

使用Graphics

Friend Function draw_tank() As Boolean

    ' Create pen. 
    Dim blackPen As New Pen(Color.Black, 3)

    ' Create rectangle to bound ellipse. 
    Dim rect As New Rectangle(100, 100, 200, 200)
    ' Keeping the width & length same (200) we get a circle

    ' Create start and sweep angles on ellipse. 
    Dim startAngle As Single = 225.0F
    Dim sweepAngle As Single = 90.0F

    ' Draw arc to screen.
    Dim myarc As Graphics = Me.CreateGraphics
    myarc.DrawArc(blackPen, rect, startAngle, sweepAngle)

    Return True
End Function

建议/改进.

注意-这不是我代码中的实际功能.

Note - This isn't the actual function from my code.

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