画像の周囲に残像が残る (ID:142757)

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前に教えたジャン。
配列。
pictureBoxを200個も使うの？
このプログラムはPictureBoxは1個だよ。
'_______________________________
Option Strict On
'VisualBasic2008無料版
'必要なもん
'PictureBox1,Button1,Timer1
'をフォームに入れる
Public Class Form1
    Private hosi_suu As Integer = 200
    Private hosi_x(hosi_suu - 1) As Integer
    Private hosi_y(hosi_suu - 1) As Integer
    Private hosi_size(hosi_suu - 1) As Integer
    Private hosi_speed(hosi_suu - 1) As Integer
    Private hosi_left_right(hosi_suu - 1) As Integer
    Private myRandom As Random

Public Sub New()

' この呼び出しは、Windows フォーム デザイナで必要です。
        InitializeComponent()

' InitializeComponent() 呼び出しの後で初期化を追加します。
        With Me
            .BackColor = Color.Brown
            .Size = New Size(500, 700)
            .StartPosition = FormStartPosition.CenterScreen
        End With
    End Sub

Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        With PictureBox1
            .BackColor = Color.Black
            .Size = New Size(450, 600)
            .Location = New Point(20, 50)
        End With
        Button1.Location = New Point(210, 20)
        Button1.Text = "Start"
        myRandom = New Random()
        Dim i As Integer
        For i = 0 To hosi_suu - 1
            hosi_size(i) = myRandom.Next(5, 30)
            hosi_x(i) = myRandom.Next(20, 480)
            hosi_y(i) = myRandom.Next(20, 500)
            hosi_speed(i) = myRandom.Next(1, 5)
            hosi_left_right(i) = myRandom.Next(-2, 2)
        Next
    End Sub

Private Sub PictureBox1_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles PictureBox1.Paint
        Dim g As Graphics = e.Graphics
        Dim i As Integer
        For i = 0 To hosi_suu - 1
            Dim my_font As New Font("ms gothic", hosi_size(i))
            g.SmoothingMode = Drawing2D.SmoothingMode.HighQuality
            g.DrawString("★", my_font, Brushes.Yellow, hosi_x(i), hosi_y(i))
        Next
    End Sub

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Timer1.Interval = 1
        Timer1.Start()
        Button1.Enabled = False
    End Sub

Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
        For i As Integer = 0 To hosi_suu - 1
            hosi_y(i) += hosi_speed(i)
            hosi_x(i) += hosi_left_right(i)
            If hosi_y(i) > 600 Or hosi_x(i) < 0 Or hosi_x(i) > 500 Then
                hosi_y(i) = 0
                hosi_x(i) = myRandom.Next(20, 480)
                hosi_left_right(i) = myRandom.Next(-5, 5)
            End If
            PictureBox1.Invalidate()
        Next
    End Sub
End Class

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