Analog clock

[Andreik 66]

Hey guys, I'm trying to create an analog clock but I don't know exactly how to make the hour, min & sec hands to rotate corectly (they are triangle shape - check the behaviour from 3 and 9). I have some ideas in my mind how to fix that but maybe this can be done with some math.

Here is my code:

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#include <GDIPlus.au3>

Global Const $PI = 3.1415926535897932384626433832795
Global Const $Width = 10
Global $HourPoly[4][2], $MinPoly[4][2], $SecPoly[4][2]

$HourPoly[0][0] = 3
$HourPoly[1][0] = 512 - $Width
$HourPoly[1][1] = 384
$HourPoly[2][0] = 512 + $Width
$HourPoly[2][1] = 384

$MinPoly[0][0] = 3
$MinPoly[1][0] = 512 - $Width
$MinPoly[1][1] = 384
$MinPoly[2][0] = 512 + $Width
$MinPoly[2][1] = 384

$SecPoly[0][0] = 3
$SecPoly[1][0] = 512 - $Width
$SecPoly[1][1] = 384
$SecPoly[2][0] = 512 + $Width
$SecPoly[2][1] = 384

$hMain = GUICreate("Analog clock",1024,768,0,0,0x80000000,0x00000008)
GUISetState(@SW_SHOW,$hMain)

_GDIPlus_Startup()
$hGraphics = _GDIPlus_GraphicsCreateFromHWND($hMain)
$hBitmap = _GDIPlus_BitmapCreateFromGraphics(1024,768,$hGraphics)
$hBackBuffer = _GDIPlus_ImageGetGraphicsContext($hBitmap)
$hImage = _GDIPlus_ImageLoadFromFile(@ScriptDir & "clock.bmp")
$hHourBrush = _GDIPlus_BrushCreateSolid(0xFF004080)
$hMinBrush = _GDIPlus_BrushCreateSolid(0xFF0080FF)
$hSecBrush = _GDIPlus_BrushCreateSolid(0xFFFFFFFF)

While True
    If GUIGetMsg() = -3 Then ExitLoop
    _GDIPlus_GraphicsClear($hBackBuffer)
    _GDIPlus_GraphicsDrawImage($hBackBuffer,$hImage,0,0)
    $HourPoly[3][0] = 512 + Cos(TimeToRadians("hour")) * 165
    $HourPoly[3][1] = 384 - Sin(TimeToRadians("hour")) * 165
    $MinPoly[3][0] = 512 + Cos(TimeToRadians("min")) * 220
    $MinPoly[3][1] = 384 - Sin(TimeToRadians("min")) * 220
    $SecPoly[3][0] = 512 + Cos(TimeToRadians("sec")) * 300
    $SecPoly[3][1] = 384 - Sin(TimeToRadians("sec")) * 300
    _GDIPlus_GraphicsFillPolygon($hBackBuffer,$HourPoly,$hHourBrush)
    _GDIPlus_GraphicsFillPolygon($hBackBuffer,$MinPoly,$hMinBrush)
    _GDIPlus_GraphicsFillPolygon($hBackBuffer,$SecPoly,$hSecBrush)
    _GDIPlus_GraphicsDrawImage($hGraphics,$hBitmap,0,0)
    Sleep(10)
WEnd

_GDIPlus_BrushDispose($hSecBrush)
_GDIPlus_BrushDispose($hMinBrush)
_GDIPlus_BrushDispose($hHourBrush)
_GDIPlus_ImageDispose($hImage)
_GDIPlus_GraphicsDispose($hBackBuffer)
_GDIPlus_BitmapDispose($hBitmap)
_GDIPlus_GraphicsDispose($hGraphics)
_GDIPlus_Shutdown()

Func TimeToRadians($sTimeType)
    Local $Sec = @SEC, $Min = @MIN, $Hour = @HOUR
    Switch $sTimeType
        Case "sec"
            Return ($PI / 2) - ($Sec  * ($PI / 30))
        Case "min"
            Return ($PI / 2) - ($Min  * ($PI / 30)) - (Int($Sec / 10) * ($PI / 180))
        Case "hour"
            Return ($PI / 2) - ($Hour * ($PI / 6 )) - ($Min / 12) * ($PI / 30)
    EndSwitch
EndFunc

And the background image:

Edited December 27, 2011 by Andreik

[kylomas 416]

andreik,

There are several threads about clocks, one of which is this thread dealing with hand positioning...

kylomas

[Yashied 245]

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#Include <GDIPlus.au3>
#Include <WinAPIEx.au3>

Global Const $Width = 10
Global $HourPoly[4][2], $MinPoly[4][2], $SecPoly[4][2], $TempPoly[3]
Global $Update = True

$HourPoly[0][0] = 3
$HourPoly[0][1] = -1 ; Previous angle
$HourPoly[1][0] = 512 - $Width
$HourPoly[1][1] = 384
$HourPoly[2][0] = 512 + $Width
$HourPoly[2][1] = 384
$HourPoly[3][0] = 512
$HourPoly[3][1] = 154
$TempPoly[0] = $HourPoly

$MinPoly[0][0] = 3
$MinPoly[0][1] = -1 ; Previous angle
$MinPoly[1][0] = 512 - $Width
$MinPoly[1][1] = 384
$MinPoly[2][0] = 512 + $Width
$MinPoly[2][1] = 384
$MinPoly[3][0] = 512
$MinPoly[3][1] = 104
$TempPoly[1] = $MinPoly

$SecPoly[0][0] = 3
$SecPoly[0][1] = -1 ; Previous angle
$SecPoly[1][0] = 512 - $Width
$SecPoly[1][1] = 384
$SecPoly[2][0] = 512 + $Width
$SecPoly[2][1] = 384
$SecPoly[3][0] = 512
$SecPoly[3][1] = 62
$TempPoly[2] = $SecPoly

$hMain = GUICreate("Analog clock", 1024, 768, 0, 0, 0x80000000, 0x00000008)
GUISetState(@SW_SHOW, $hMain)

_GDIPlus_Startup()
$hGraphics = _GDIPlus_GraphicsCreateFromHWND($hMain)
$hBitmap = _GDIPlus_BitmapCreateFromGraphics(1024, 768, $hGraphics)
$hBackBuffer = _GDIPlus_ImageGetGraphicsContext($hBitmap)
_GDIPlus_GraphicsSetSmoothingMode($hBackBuffer, 2)
$hImage = _GDIPlus_ImageLoadFromFile(@ScriptDir & "clock.bmp")
$hHourBrush = _GDIPlus_BrushCreateSolid(0xFF004080)
$hMinBrush = _GDIPlus_BrushCreateSolid(0xFF0080FF)
$hSecBrush = _GDIPlus_BrushCreateSolid(0xFFFFFFFF)

While True
    If GUIGetMsg() = -3 Then ExitLoop
    $Angle = Round(360 * @SEC / 60)
    If $SecPoly[0][1] <> $Angle Then
        $TempPoly[2] = $SecPoly
        $SecPoly[0][1] = $Angle
        _WinAPI_RotatePoints($TempPoly[2], $SecPoly[3][0], $SecPoly[1][1], $Angle, 1, 3)
        $Update = True
    EndIf
    $Angle = Round(360 * @MIN / 60)
    If $MinPoly[0][1] <> $Angle Then
        $TempPoly[1] = $MinPoly
        $MinPoly[0][1] = $Angle
        _WinAPI_RotatePoints($TempPoly[1], $MinPoly[3][0], $MinPoly[1][1], $Angle, 1, 3)
        $Update = True
    EndIf
    $Angle = Round(360 * (@HOUR - 12) / 24 + $MinPoly[0][1] / 72)
    If $HourPoly[0][1] <> $Angle Then
        $TempPoly[0] = $HourPoly
        $HourPoly[0][1] = $Angle
        _WinAPI_RotatePoints($TempPoly[0], $HourPoly[3][0], $HourPoly[1][1], $Angle, 1, 3)
        $Update = True
    EndIf
    If $Update Then
        _GDIPlus_GraphicsClear($hBackBuffer, 0)
        _GDIPlus_GraphicsDrawImage($hBackBuffer, $hImage, 0, 0)
        _GDIPlus_GraphicsFillPolygon($hBackBuffer, $TempPoly[0], $hHourBrush)
        _GDIPlus_GraphicsFillPolygon($hBackBuffer, $TempPoly[1], $hMinBrush)
        _GDIPlus_GraphicsFillPolygon($hBackBuffer, $TempPoly[2], $hSecBrush)
        _GDIPlus_GraphicsDrawImage($hGraphics, $hBitmap, 0, 0)
        $Update = False
    EndIf
WEnd

_GDIPlus_BrushDispose($hSecBrush)
_GDIPlus_BrushDispose($hMinBrush)
_GDIPlus_BrushDispose($hHourBrush)
_GDIPlus_ImageDispose($hImage)
_GDIPlus_GraphicsDispose($hBackBuffer)
_GDIPlus_BitmapDispose($hBitmap)
_GDIPlus_GraphicsDispose($hGraphics)
_GDIPlus_Shutdown()

Edited December 28, 2011 by Yashied

[Andreik 66]

Very nice example Yashied! Thank you very much!