vb.net高速绘图 vb画图语句

VB.net中如何画图?【vb.net高速绘图 vb画图语句】VB.net与VB不同 。
VB.net已经有专门绘图的类 。
可以定义笔刷然后用Drawing类中的方法绘制 。
Private Sub DrawEllipse()
Dim myPen As New System.Drawing.Pen(System.Drawing.Color.Red)
Dim formGraphics as System.Drawing.Graphics
formGraphics = Me.CreateGraphics()
formGraphics.DrawEllipse(myPen, New Rectangle(0,0,200,300))
myPen.Dispose()
formGraphics.Dispose()
End Sub
Private Sub DrawRectangle()
Dim myPen As New System.Drawing.Pen(System.Drawing.Color.Red)
Dim formGraphics as System.Drawing.Graphics
formGraphics = Me.CreateGraphics()
formGraphics.DrawRectangle(myPen, New Rectangle(0,0,200,300))
myPen.Dispose()
formGraphics.Dispose()
End Sub
vb.net 多线程 在界面上绘图t.Suspend()这是一个暂停的线程 。是一个异步方法 。
t.Sleep , 我看到了一个同步方法 。必须等待超过了该方法的运行,是继续进行到下一步骤 。
差不多了,from.show的from.showdiaglog的区别!
疑问 , 我没有找到原因 。
vb.net绘图问题代码:
Public Class Form1
'*********************************************************************
'作者:章鱼哥,QQ:3107073263 群:309816713
'如有疑问或好的建议请联系我,大家一起进步
'*********************************************************************
'绘制圆角矩形函数
Private Function GetRoundedRectPath(ByVal rect As Rectangle, ByVal radius As Integer) As System.Drawing.Drawing2D.GraphicsPath
rect.Offset(-1, -1)
Dim RoundRect As New Rectangle(rect.Location, New Size(radius - 1, radius - 1))
Dim path As New System.Drawing.Drawing2D.GraphicsPath
path.AddArc(RoundRect, 180, 90)'左上角
RoundRect.X = rect.Right - radius'右上角
path.AddArc(RoundRect, 270, 90)
RoundRect.Y = rect.Bottom - radius'右下角
path.AddArc(RoundRect, 0, 90)
RoundRect.X = rect.Left'左下角
path.AddArc(RoundRect, 90, 90)
path.CloseFigure()
Return path
End Function
'绘制矩形
Private Sub DrawingRect()
Dim g As Graphics = Me.CreateGraphics
Dim Pen As New Pen(Brushes.DarkRed, 2)
Dim Hei As Integer = Me.Height
Dim Wid As Integer = Me.Width
'矩形的位置和长宽随着窗体的变化而改变
Dim Rec As New Rectangle(Int(Wid / 5), Int(Hei / 5), Int(Wid / 2), Int(Hei / 2))
'g.DrawRectangle(Pen, Rec)
'清楚现有的矩形
g.Clear(Me.BackColor)
g.DrawPath(Pen, GetRoundedRectPath(Rec, 30))
End Sub
Private Sub Form1_Paint(ByVal sender As System.Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles MyBase.Paint
DrawingRect()
End Sub
Private Sub Form1_SizeChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.SizeChanged
Me.Invalidate() '此函数可引发Paint事件
End Sub
End Class
效果截图:
原窗口:
缩小后:
如何使用vb.net调用cad进行绘图你去查查书吧,书上挺详细的,在这说不好说,你先在项目里引用 。然后 Dim acadapp As AcadApplication Dim acaddoc As AcadDocument On Error Resume Next AcadApp = GetObject(, "AutoCAD.Application") If Err.Number Then Err.Clear() AcadApp = CreateObject("AutoCAD.Application") If Err.Number Then MsgBox("不能运行AutoCAD,请检查是否安装了AutoCAD") Exit Sub End If End If AcadApp.Visible = True '界面可视
VB.net 高次曲线拟合并绘图构造Pen的时候可以指定粗细vb.net高速绘图,如果你指定为1,并且放大vb.net高速绘图了10倍,最后就成10了,所以你指定小点就行了,比如 Dim p As New Pen(Color.Black, 0.01)最终绘制的线的粗细不会小于1
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