用VB画4个点的NURBS曲线参考代码
Dim p(10000, 1) As Double
Dim num As Integer
Dim ptx As Single
Dim pty As Single
Dim w0, w1, w2, w3 As Single
Private Sub Command1_Click()
Dim t As Single
Dim i As Integer
Dim f0, f1, f2, f3 As Single
Picture1.DrawWidth = 3
For t = 0 To 1 Step 1 / 1000
w0 = Val(Form1.Text1.Text)
w1 = Val(Form1.Text2.Text)
w2 = Val(Form1.Text3.Text)
w3 = Val(Form1.Text4.Text)
f0 = 1 / 6 * (-t ^ 3 + 3 * t ^ 2 - 3 * t + 1)
f1 = 1 / 6 * (3 * t ^ 3 - 6 * t ^ 2 + 4)
f2 = 1 / 6 * (-3 * t ^ 3 + 3 * t ^ 2 + 3 * t + 1)
f3 = 1 / 6 * (t ^ 3)
ptx = (f0 * p(0, 0) * w0 + f1 * p(1, 0) * w1 + f2 * p(2, 0) * w2 + f3 * p(3, 0) * w3) / (f0 * w0 + f1 * w1 + f2 * w2 + f3 * w3)
pty = (f0 * p(0, 1) * w0 + f1 * p(1, 1) * w1 + f2 * p(2, 1) * w2 + f3 * p(3, 1) * w3) / (f0 * w0 + f1 * w1 + f2 * w2 + f3 * w3)
Picture1.PSet (ptx, pty), vbRed
Next
Picture1.DrawWidth = 1
For i = 0 To num - 2
Picture1.Line (p(i, 0), p(i, 1))-(p((i + 1), 0), p((i + 1), 1)), vbGreen
Next
End Sub
Private Sub Command2_Click()
Dim i As Integer
For i = 0 To num - 2
Picture1.Line (p(i, 0), p(i, 1))-(p((i + 1), 0), p((i + 1), 1)), vbWhite
Next
For i = 0 To num
Picture1.Circle (p(i, 0), p(i, 1)), 40, vbWhite
相关文档：
http://tieba.baidu.com/f?kz=580219489
http://www.anqn.com/vb/154/8974.shtml
http://www.codefans.net/soft/5089.shtml
http://www.mndsoft.com/blog/article.asp?id=1121
http://topic.csdn.net/t/20020113/14/474848.html
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function alllefttab()
WebBrowser1.Document.par ......
'代码:
Option Explicit
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Private Declare Function ProcessF ......
Dim wdapp As Word.Application
Dim wddoc As Word.Document
Dim wdtable As Word.Table
Set wdapp = CreateObject("word.application")
Set wddoc = wdapp.Documents.Add
......
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Private Declare Function SetWindowPos Lib "user32" (ByVal hwnd As
Long, ByVal hWndInsertAfter As Long,& _
ByVal X As Long, ByVal Y As
Long, ByVal cx As Long, ByVal cy As Long, ByVal wFlags As Long) As Long & _
&n ......
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主要是因为1webbrowser 的句柄找不到。经过努力搜索，终于解决了。做个记录.
Private Declare Function PostMessage Lib "user32" Alias "PostMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
Private Declare Function ......
