Ò׽ؽØͼÈí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

ÓÃVB»­4¸öµãµÄNURBSÇúÏ߲ο¼´úÂë

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
   


Ïà¹ØÎĵµ£º

ÈçºÎÓÅ»¯VB³ÌÐò

ÈçºÎÈ¥ÓÅ»¯ÄãµÄVB³ÌÐò°ïÖú 
1¡¢ÈçºÎÈ¥ÓÅ»¯ÄãµÄVB³ÌÐò
Visual Basic ×÷ΪһÖָ߼¶±à³ÌÓïÑÔ£¬ËüÒ²ÓÐ×Ų»¿É±ÜÃâµÄȱµã---¿ª·¢³öµÄÓ¦ÓóÌÐòÔËÐÐËÙ¶ÈÂý¡£Èç¹ûÎÒÃÇÄܹ»³ÌÐò×öһЩÓÅ»¯£¬ÄÇôÇé¿ö½«»á´ó´ó¸ÄÉÆ¡£ÒªÓÅ»¯³ÌÐòÔËÐеÄʵ¼ÊËٶȣ¬³£Óõķ½·¨ÓÐÈýÖÖ£º
1.¾¡Á¿±ÜÃâʹÓà Variant ±äÁ¿¡£ÓÉÓÚVB²»ÄÜÈ·¶¨ Variant ±äÁ¿µÄ¾ ......

VB µ¥ÊµÀýÔËÐÐ

VB6
ÔÚ³ÌÐòÔËÐÐʱÓÃÈçÏÂÓï¾ä£º
if   app.PrevInstance=true   then  
            end    
end   if
VB 2005:
1. ÔÚVB2005ÖÐ,´ò¿ª"ÊôÐÔ"Ò³,ÆôÓÃ"Ó¦ÓóÌÐò“¿ò¼Ü, Ñ¡ÖÐ"
µ¥ÊµÀýÓ¦ÓóÌÐò"Ç°Ã渴ѡ¿ò,¾ÍÐÐÁË¡£
......

vb ´®¿ÚͨѶ

MSComm¿Ø¼þÌṩÁËÁ½ÖÖ´¦ÀíͨÐŵķ½Ê½£ºÒ»ÖÖΪʼþÇý¶¯·½Ê½£¬¸Ã·½Ê½Ï൱ÓÚÒ»°ã³ÌÐòÉè¼ÆÖеÄÖжϷ½Ê½¡£µ±´®¿Ú·¢Éúʼþ»ò´íÎóʱ£¬MSComm¿Ø¼þ»á²úÉúOnCommʼþ£¬Óû§³ÌÐò¿ÉÒÔ²¶»ñ¸Ãʼþ½øÐÐÏàÓ¦´¦Àí¡£±¾ÎĵÄÁ½¸öÀý×Ó¾ù²ÉÓø÷½Ê½¡£ÁíÒ»ÖÖΪ²éѯ·½Ê½£¬ÔÚÓû§³ÌÐòÖÐÉè¼Æ¶¨Ê±»ò²»¶¨Ê±²éѯ MSComm¿Ø¼þµÄijЩÊôÐÔÊÇ·ñ·¢Éú±ä»¯£¬´Ó¶øÈ ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØͼ | ¸ÓICP±¸09004571ºÅ