对于下雪的景象大家可能都不陌生,我们还是用VB来制作一个下雪的景象吧。其实制作这样一个下雪的景象并不复杂,它的原理是首先在底色为黑色的屏幕上随机画出许多白点(雪花),然后使这些雪花不断地向下移动(重画),反复循环,就成功地模拟了下雪的景象。下面是这个小程序,你可以修改其中的一些数据调整雪花的密度和雪花落下的快慢。 双击窗体写如下代码:
Dim Snow(1000, 2), Amounty As Integer Private Sub
Form_Load() Form1.Show DoEvents Randomize Amounty =
325 For J = 1 To Amounty Snow(J, 0) = Int(Rnd *
Form1.Width) Snow(J, 1) = Int(Rnd * Form1.Height) Snow(J, 2) = 10 +
(Rnd * 20) Next J Do While Not (DoEvents = 0) For LS = 1 To
10 For I = 1 To Amounty OldX = Snow(I, 0): OldY = Snow(I, 1)
Snow(I, 1) = Snow(I, 1) + Snow(I, 2) If Snow(I, 1) $#@62;
Form1.Height Then Snow(I, 1) = 0: Snow(I, 2) = 5 + (Rnd * 30)
Snow(I, 0) = Int(Rnd * Form1.Width) OldX = 0: OldY = 0 End
If Coloury = 8 * (Snow(I, 2) - 10): Coloury = 60 + Coloury Pset (OldX,
OldY), QBColor(0) Pset (Snow(I, 0), Snow(I, 1)), RGB(Coloury, Coloury,
Coloury) Next I Next LS Loop End End Sub
编写窗体的鼠标按下代码: Private Sub Form_MouseDown(Button As Integer,Shift As Integer,
X As Single, Y As Single) unload me End
Sub 运行上面的小程序,就可以看到漫天的雪花在缓缓落下,地面上还会有积雪!鼠标单击可结束程序。
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