学习VB编程第24天 做个小游戏-膨胀的星球

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今天是我学习VB编程的第24天，今天学习了刘金玉老师的零基础VB教程第31期，内容是碰撞模型。

补充知识点：

1.RGB函数：颜色函数，表达为RGB（参数1，参数2，参数3），三个参数都在0-255内取值。

2.自定义函数：

Function crash(A As Shape, B As Shape) As Boolean

Dim F As Boolean

F = False

If....Then

F = True

End If

End Function

案例：做一个碰撞小游戏

1.如图新建三个控件

2.输入代码：

Dim currentdirection As Integer

Private Sub Form_KeyDown(KeyCode As Integer, Shift As Integer)

If KeyCode = vbKeyUp Then

currentdirection = 3

ElseIf KeyCode = vbKeyLeft Then

currentdirection = 2

ElseIf KeyCode = vbKeyDown Then

currentdirection = 1

ElseIf KeyCode = vbKeyRight Then

currentdirection = 0

End If

End Sub

Function crash(A As Shape, B As Shape) As Boolean

Dim F As Boolean

F = False

If A.Left + A.Width >= B.Left And A.Left <= B.Left + B.Width And A.Top + A.Height >= B.Top And A.Top <= B.Top + B.Height Then

F = True

End If

crash = F

End Function

Private Sub Timer1_Timer()

Dim speed As Integer

speed = 100

If currentdirection = 0 Then

Shapeball.Left = Shapeball.Left + speed

ElseIf currentdirection = 1 Then

Shapeball.Top = Shapeball.Top + speed

ElseIf currentdirection = 2 Then

Shapeball.Left = Shapeball.Left - speed

ElseIf currentdirection = 3 Then

Shapeball.Top = Shapeball.Top - speed

End If

If crash(Shapeball, Shape1) Then

Shapeball.FillColor = Shape1.FillColor

Shapeball.Width = Shapeball.Width + 200

Shapeball.Height = Shapeball.Height + 200

Randomize

Shape1.FillColor = RGB(Rnd * 255, Rnd * 255, Rnd * 255)

Shape1.Left = Rnd * Form1.Width - 20

Shape1.Top = Rnd * Form1.Height - 20

Shape1.Shape = Int(Rnd * 5) + 1

End If

End Sub

3.生成程序运行