Operator Reference

HALCON Operator Reference / Legacy / Graphics

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get_line_approxT_get_line_approxGetLineApproxGetLineApproxget_line_approx (Operator)

get_line_approxT_get_line_approxGetLineApproxGetLineApproxget_line_approx — Get the current approximation error for contour display.

Warning

get_line_approxget_line_approxGetLineApproxGetLineApproxget_line_approx is obsolete and is only provided for reasons of backward compatibility.

Signature

get_line_approx( : : WindowHandle : Approximation)

Herror T_get_line_approx(const Htuple WindowHandle, Htuple* Approximation)

void GetLineApprox(const HTuple& WindowHandle, HTuple* Approximation)

Hlong HWindow::GetLineApprox() const

static void HOperatorSet.GetLineApprox(HTuple windowHandle, out HTuple approximation)

int HWindow.GetLineApprox()

def get_line_approx(window_handle: HHandle) -> int

Description

get_line_approxget_line_approxGetLineApproxGetLineApproxget_line_approx returns a parameter that controls the approximation error for region contour display in the window. It is used by the operator disp_regiondisp_regionDispRegionDispRegiondisp_region. ApproximationApproximationApproximationapproximationapproximation controls the polygon approximation for contour display ( 0 <=> no approximation). ApproximationApproximationApproximationapproximationapproximation is only important for displaying the contour of objects, especially if a line style was set with set_line_styleset_line_styleSetLineStyleSetLineStyleset_line_style.

Execution Information

• Multithreading type: reentrant (runs in parallel with non-exclusive operators).
• Multithreading scope: global (may be called from any thread).
• Processed without parallelization.

Parameters

WindowHandleWindowHandleWindowHandlewindowHandlewindow_handle (input_control)  window → HWindow, HTupleHHandleHTupleHtuple (handle) (IntPtr) (HHandle) (handle)

Window handle.

ApproximationApproximationApproximationapproximationapproximation (output_control)  string → HTupleintHTupleHtuple (integer) (int / long) (Hlong) (Hlong)

Current approximation error for contour display.

Result

get_line_approxget_line_approxGetLineApproxGetLineApproxget_line_approx returns 2 ( H_MSG_TRUE) if the window is valid. Otherwise an exception is raised.

Possible Successors

set_line_approxset_line_approxSetLineApproxSetLineApproxset_line_approx, set_line_styleset_line_styleSetLineStyleSetLineStyleset_line_style, disp_regiondisp_regionDispRegionDispRegiondisp_region

See also

get_region_polygonget_region_polygonGetRegionPolygonGetRegionPolygonget_region_polygon, set_line_approxset_line_approxSetLineApproxSetLineApproxset_line_approx, set_line_styleset_line_styleSetLineStyleSetLineStyleset_line_style, disp_regiondisp_regionDispRegionDispRegiondisp_region

Module

Foundation

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