88 lines
1.5 KiB
Text
88 lines
1.5 KiB
Text
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' Gambas class file
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Private $hImage As Image
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Private Const GRID_SIZE As Integer = 64
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Fast Private Sub Compute()
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Dim hImage As New Image(3840, 2160, Color.White)
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Dim I, J As Integer
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Dim X, Y, XR, YR As Float
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Dim CA, SA As Float
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Dim bBlack As Boolean
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Dim D As Float
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D = Sqr(2) / 2
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CA = D 'Cos(Rad(30))
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SA = D 'Sin(Rad(30))
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For J = 0 To hImage.H - 1
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For I = 0 To hImage.W - 1
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bBlack = False
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X = Frac(I / GRID_SIZE)
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Y = Frac(J / GRID_SIZE)
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GoSub ADD_COLOR
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XR = CA * I + SA * J
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YR = CA * J - SA * I
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X = Frac((XR + 1024) / GRID_SIZE)
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Y = Frac((YR + 1024) / GRID_SIZE)
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GoSub ADD_COLOR
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' XR = CA * I - SA * J
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' YR = CA * J + SA * I
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'
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' X = Frac((XR + 1024) / GRID_SIZE)
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' Y = Frac((YR + 1024) / GRID_SIZE)
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'
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' GoSub ADD_COLOR
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If bBlack Then hImage[I, J] = Color.Black
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Next
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Next
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$hImage = hImage
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Return
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ADD_COLOR:
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If X < 0.5 Then bBlack = Not bBlack
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If Y < 0.5 Then bBlack = Not bBlack
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Return
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End
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Public Sub Form_Open()
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UpdateTitle
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Compute
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imvImage.Image = $hImage
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End
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Private Sub UpdateTitle()
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Me.Title = "QuasiRegular (" & Format(imvImage.Zoom, "0%") & ")"
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End
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Public Sub imvImage_MouseWheel()
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If Mouse.Forward Then
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imvImage.Zoom = Min(32, imvImage.Zoom * Sqr(2))
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Else
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imvImage.Zoom = Max(0.25, imvImage.Zoom / Sqr(2))
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Endif
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UpdateTitle
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End
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