Question

我正在寻找drawpolygon方法的帮助。我没有运气得到任何工作。期待做5个相同大小的三角形，彼此相邻。问题是我必须使用do-while循环。感谢您抽出宝贵时间来帮助我!!

Answer 1

只需定义数组中的点，然后用笔写下它们：

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

Dim point1 As New Point(50, 50)
Dim point2 As New Point(100, 25)
Dim curvePoints As Point() = {point1, point2}

Me.CreateGraphics.DrawPolygon(blackPen, curvePoints)

查看关于它的MSDN Documentation。

如果你在循环中做任何事情都没关系，取决于如何。如果这不能解决您的问题，请发布您的代码，以便为您提供更多帮助。

循环示例：

Do While i < 3
    point1 As New Point(50 + i * 10, 50)
    point2 As New Point(100 + i * 7, 25)

    curvePoints = {point1, point2}
    Me.CreateGraphics.DrawPolygon(blackPen, curvePoints)
    i += 1
Loop

Answer 2

我实际上没有对这种结构进行过测试，但它已经完成了一个工作项目;我怀疑它会起作用，而且这些GDI +中的一些东西在第一次拾取时非常蹩脚。

Public Class Form1
Private subject As Image

Private Sub Form1_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles Me.Paint
    If Not subject Is Nothing Then
        Dim g As Graphics = e.Graphics
        g.DrawImage(subject, New Point(1, 1))
    End If
End Sub

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
    Dim tempBM As New Bitmap(subject)
    tempBM.SetResolution(subject.HorizontalResolution, subject.VerticalResolution)
    Using g As Graphics = Graphics.FromImage(tempBM)
         g.DrawPolygon(OutlinePen, Polygon.GetPoints)
    End Using
    subject = tempBM
    Invalidate()
End Sub
End Class

哦，Polygon是我的代码中的一个你不会拥有的类。但只需将Polygon.GetPoints替换为您想要使用的任何点数。

使用do-while循环的Visual Basic drawpolygon方法？

2 个答案: