82 lines
1.7 KiB
Text
82 lines
1.7 KiB
Text
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' Gambas module file
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Public screen As New Window As "screen"
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' structure pour stocker les coordonnées d'une étoile
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' ainsi que sa vitesse
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Public Struct Star
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x As Integer
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y As Integer
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speed As Integer
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End Struct
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' notre champ étoilé
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Private Starfield As New Star[]
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' le logo
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Private img As Image
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Private rotation As Integer = 0
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Public Sub Main()
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Dim i As Integer
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Dim stars As Star
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Randomize
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' Ouverture de notre fenêtre, on limite
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' a 60 images par secondes maximum
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With screen
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.Framerate = 60
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.Resizable = False
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.Show()
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End With
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img = Image.Load("logo.png")
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' Remplissons notre champ étoilé
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For i = 0 To 100
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Stars = New Star
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Stars.x = Int(Rnd(Screen.Width))
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Stars.y = Int(Rnd(screen.Height))
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Stars.speed = Int(Rnd(1, 4))
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Starfield.Push(stars)
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Next
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End
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Public Sub screen_draw()
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Dim Stars As Star
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screen.Clear()
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For Each Stars In Starfield
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' Plus une étoile est rapide (proche), plus elle est lumineuse
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Draw.ForeColor = &h444444& * Stars.speed
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' Plus elle est proche plus sa trace est longue
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Draw.Line(Stars.x, Stars.y, Stars.x + (Stars.speed * 2), stars.y)
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Stars.x += Stars.speed
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' Notre étoile est hors de l'écran
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If Stars.x > screen.Width Then
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Stars.x = 0
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Stars.y = Int(Rnd(screen.Height))
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Stars.speed = Int(Rnd(1, 4))
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Endif
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Next
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' Attention la couleur affecte aussi les images !
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Draw.ForeColor = &hFFFFFF&
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Draw.Text(Screen.Framerate, 10, Screen.Height - 40)
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' on applique la rotation et on affiche le logo
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Draw.Rotate(rotation)
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Draw.Image(img, Screen.Width - 128, Screen.Height - 128)
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' rotation de 0 a 360 :-)
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rotation = (rotation + 1) Mod 360
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End
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