Line Points

[Petr]

Small utility for calculating points in line.

Code: (Select All)

Type LinePoints

    X As Integer

    Y As Integer

End Type

ReDim Shared LP(0) As LinePoints



Screen _NewImage(800, 600, 32)



Line (40, 399)-(100, 199)

GETPOINTS 40, 399, 100, 199, LP()

Sleep

'if all points in array are calctulated correctly, all points in LINE are draw yellow





For D = 0 To UBound(LP)

    PSet (LP(D).X, LP(D).Y), &HFFFFFF00

Next D





Sub GETPOINTS (x1, y1, x2, y2, A() As LinePoints)

    Dim lenght As Integer

    lenght = _Hypot(x1 - x2, y1 - y2) 'Fellippe Heitor show me using this great function.

    ReDim A(lenght) As LinePoints

    For fill = 0 To lenght

        If x1 > x2 Then A(fill).X = x1 - fill * ((x1 - x2) / lenght)

        If x1 < x2 Then A(fill).X = x1 + fill * ((x2 - x1) / lenght)

        If x1 = x2 Then A(fill).X = x1

        If y1 > y2 Then A(fill).Y = y1 - fill * ((y1 - y2) / lenght)

        If y1 < y2 Then A(fill).Y = y1 + fill * ((y2 - y1) / lenght)

        If y1 = y2 Then A(fill).Y = y1

    Next

End Sub

[TerryRitchie]

Hey that's handy. Thank you.

[Dav]

Nice snippet.  Thanks.

- Dav