Function Reference


Reverses the order of the points that define a path's lines and curves

#include <GDIPlus.au3>
_GDIPlus_PathReverse ( $hPath )


$hPath Pointer to a GraphicsPath object

Return Value

Success: True.
Failure: False and sets the @error flag to non-zero, @extended may contain GPSTATUS error code ($GPIP_ERR* see GPIPlusConstants.au3).

See Also

Search GdipReversePath in MSDN Library.


#include <GDIPlus.au3>
#include <GUIConstantsEx.au3>


Func Example()
        Local $iW, $iH, $hGUI, $hGraphic, $hBrush, $hPen, $hPath, $hPath_Clone, $hMatrix

        ; Create GUI
        $iW = 600
        $iH = 600
        $hGUI = GUICreate("GDI+", $iW, $iH)

        $hGraphic = _GDIPlus_GraphicsCreateFromHWND($hGUI) ;Create a graphics object from a window handle
        _GDIPlus_GraphicsSetSmoothingMode($hGraphic, $GDIP_SMOOTHINGMODE_HIGHQUALITY) ;Sets the graphics object rendering quality (antialiasing)
        _GDIPlus_GraphicsClear($hGraphic, 0xFFFFFFFF)

        $hBrush = _GDIPlus_BrushCreateSolid(0x7F8800AA)
        $hPen = _GDIPlus_PenCreate(0xFF8800AA, 2)

        $hPath = _GDIPlus_PathCreate() ;Create new path object

        ;spiral as a sequence of lines
        Local $iXOld = 0, $iYOld = 0, $iX, $iY, $iAngle = 0, $iRadius = 0
        For $i = 0 To 200
                $iX = Cos($iAngle) * $iRadius
                $iY = Sin($iAngle) * $iRadius
                $iAngle += 0.1
                $iRadius = $iAngle ^ 2 / 2
                _GDIPlus_PathAddLine($hPath, $iXOld, $iYOld, $iX, $iY)
                $iXOld = $iX
                $iYOld = $iY

        $hPath_Clone = _GDIPlus_PathClone($hPath)
        _GDIPlus_PathReverse($hPath_Clone) ;reverse path => end point of path = start point of cloned path

        $hMatrix = _GDIPlus_MatrixCreate()
        _GDIPlus_MatrixScale($hMatrix, 1.5, 1.5)
        _GDIPlus_PathTransform($hPath_Clone, $hMatrix) ;zoom cloned path

        _GDIPlus_PathAddPath($hPath, $hPath_Clone) ;add scaled/reversed path to original path

        _GDIPlus_MatrixSetElements($hMatrix, 1, 0, 0, 1, 0, 0) ;reset matrix
        _GDIPlus_MatrixTranslate($hMatrix, $iW / 2, $iH / 2, True)
        _GDIPlus_PathTransform($hPath, $hMatrix) ;move path to center of window

        _GDIPlus_GraphicsFillPath($hGraphic, $hPath, $hBrush) ;Fill path to graphics handle (GUI)
        _GDIPlus_GraphicsDrawPath($hGraphic, $hPath, $hPen) ;Draw path to graphics handle (GUI)

        ; Loop until the user exits.
        Until GUIGetMsg() = $GUI_EVENT_CLOSE

        ; Clean up resources
EndFunc   ;==>Example