set_line_approxT_set_line_approxSetLineApproxSetLineApproxset_line_approx (算子名称)
名称
set_line_approxT_set_line_approxSetLineApproxSetLineApproxset_line_approx — Define the approximation error for contour display.
Warning
set_line_approxset_line_approxSetLineApproxSetLineApproxSetLineApproxset_line_approx is obsolete and is only provided for
reasons of backward compatibility.
参数签名
描述
set_line_approxset_line_approxSetLineApproxSetLineApproxSetLineApproxset_line_approx defines the approximation error for region and xld
contour display in the window WindowHandleWindowHandleWindowHandleWindowHandlewindowHandlewindow_handle. ApproximationApproximationApproximationApproximationapproximationapproximation
values greater than zero cause an approximation of line strokes using less
points. This may enable faster and in some cases smoother visualization. The
parameter describes the maximal deviation in pixels of the approximated
contour from the original contour (Ramer-Douglas-Peucker algorithm).
运行信息
- Multithreading type: reentrant (runs in parallel with non-exclusive operators).
- Multithreading scope: global (may be called from any thread).
- Processed without parallelization.
参数表
WindowHandleWindowHandleWindowHandleWindowHandlewindowHandlewindow_handle (input_control) window → HWindow, HTupleHHandleHTupleHtuple (handle) (IntPtr) (HHandle) (handle)
Window handle.
ApproximationApproximationApproximationApproximationapproximationapproximation (input_control) integer → HTupleintHTupleHtuple (integer) (int / long) (Hlong) (Hlong)
Maximum deviation from the original contour.
Default:
0
Value range:
0
≤
Approximation
Approximation
Approximation
Approximation
approximation
approximation
例程 (HDevelop)
* Calling...
set_line_approx(WindowHandle,Approximation)
set_draw(WindowHandle,'margin')
disp_region(Obj,WindowHandle)
* ...corresponds with
get_region_polygon(Obj,Approximation,Row,Col)
disp_polygon(WindowHandle,Row,Col)
例程 (C)
/* Calling... */
T_set_line_approx(WindowHandle,Approximation);
create_tuple_s(mode,"margin");
T_set_draw(WindowHandle, mode);
destroy_tuple(mode);
T_disp_region(Obj,WindowHandle);
/* ...corresponds with */
create_tuple_i(&approximation,0);
create_tuple(&row,0);
create_tuple(&col,0);
T_get_region_polygon(Obj,approximation,&row,&col);
destroy_tuple(approximation);
T_disp_polygon(WindowHandle,row,col);
destroy_tuple(row); destroy_tuple(col);
例程 (HDevelop)
* Calling...
set_line_approx(WindowHandle,Approximation)
set_draw(WindowHandle,'margin')
disp_region(Obj,WindowHandle)
* ...corresponds with
get_region_polygon(Obj,Approximation,Row,Col)
disp_polygon(WindowHandle,Row,Col)
例程 (HDevelop)
* Calling...
set_line_approx(WindowHandle,Approximation)
set_draw(WindowHandle,'margin')
disp_region(Obj,WindowHandle)
* ...corresponds with
get_region_polygon(Obj,Approximation,Row,Col)
disp_polygon(WindowHandle,Row,Col)
例程 (HDevelop)
* Calling...
set_line_approx(WindowHandle,Approximation)
set_draw(WindowHandle,'margin')
disp_region(Obj,WindowHandle)
* ...corresponds with
get_region_polygon(Obj,Approximation,Row,Col)
disp_polygon(WindowHandle,Row,Col)
结果
set_line_approxset_line_approxSetLineApproxSetLineApproxSetLineApproxset_line_approx returns 2 (
H_MSG_TRUE)
if the parameter is
correct and the window is valid. Otherwise an exception is raised.
可能的前置算子
get_line_approxget_line_approxGetLineApproxGetLineApproxGetLineApproxget_line_approx
可能的后置算子
disp_regiondisp_regionDispRegionDispRegionDispRegiondisp_region
可替代算子
get_region_polygonget_region_polygonGetRegionPolygonGetRegionPolygonGetRegionPolygonget_region_polygon,
disp_polygondisp_polygonDispPolygonDispPolygonDispPolygondisp_polygon
参考其它
get_line_approxget_line_approxGetLineApproxGetLineApproxGetLineApproxget_line_approx,
set_line_styleset_line_styleSetLineStyleSetLineStyleSetLineStyleset_line_style,
set_drawset_drawSetDrawSetDrawSetDrawset_draw,
disp_regiondisp_regionDispRegionDispRegionDispRegiondisp_region,
disp_polygondisp_polygonDispPolygonDispPolygonDispPolygondisp_polygon
模块
Foundation