draw_ellipse_modT_draw_ellipse_modDrawEllipseModDrawEllipseModdraw_ellipse_mod (算子)
名称
draw_ellipse_modT_draw_ellipse_modDrawEllipseModDrawEllipseModdraw_ellipse_mod — 交互式绘制椭圆。
签名
Herror T_draw_ellipse_mod(const Htuple WindowHandle, const Htuple RowIn, const Htuple ColumnIn, const Htuple PhiIn, const Htuple Radius1In, const Htuple Radius2In, Htuple* Row, Htuple* Column, Htuple* Phi, Htuple* Radius1, Htuple* Radius2)
void DrawEllipseMod(const HTuple& WindowHandle, const HTuple& RowIn, const HTuple& ColumnIn, const HTuple& PhiIn, const HTuple& Radius1In, const HTuple& Radius2In, HTuple* Row, HTuple* Column, HTuple* Phi, HTuple* Radius1, HTuple* Radius2)
void HWindow::DrawEllipseMod(double RowIn, double ColumnIn, double PhiIn, double Radius1In, double Radius2In, double* Row, double* Column, double* Phi, double* Radius1, double* Radius2) const
static void HOperatorSet.DrawEllipseMod(HTuple windowHandle, HTuple rowIn, HTuple columnIn, HTuple phiIn, HTuple radius1In, HTuple radius2In, out HTuple row, out HTuple column, out HTuple phi, out HTuple radius1, out HTuple radius2)
void HWindow.DrawEllipseMod(double rowIn, double columnIn, double phiIn, double radius1In, double radius2In, out double row, out double column, out double phi, out double radius1, out double radius2)
描述
draw_ellipse_moddraw_ellipse_modDrawEllipseModDrawEllipseModDrawEllipseModdraw_ellipse_mod returns the parameter for any orientated ellipse, which
has been created interactively by the user in the window.
The created ellipse is described by its center, its two half axes and the angle
between the first half axis and the horizontal coordinate axis.
To create an ellipse are expected the parameters RowInRowInRowInRowInrowInrow_in,
ColumnInColumnInColumnInColumnIncolumnIncolumn_in,PhiInPhiInPhiInPhiInphiInphi_in,Radius1InRadius1InRadius1InRadius1Inradius1Inradius_1in,Radius2InRadius2InRadius2InRadius2Inradius2Inradius_2in.
Keeping the button pressed determines the length (Radius1Radius1Radius1Radius1radius1radius_1)
and the orientation (PhiPhiPhiPhiphiphi) of the first half axis.
In doing so a temporary default length for the second half axis is assumed, which may be
modified afterwards on demand.
After another mouse click in the center of the created ellipse you can move it.
A mouse click close to a vertex “grips” it to modify the length of the appropriate
half axis. You may modify the orientation only, if a vertex of the first half axis is
gripped.
Pressing the right mouse button terminates the procedure.
After terminating the procedure the ellipse is not visible in the window any longer.
注意
If used in a buffer window, mouse events have to be supplied by the
application, while the draw operator must be run in another thread.
执行信息
- 多线程类型：可重入（与非独占算子并行运行）。
- 多线程作用域：全局（可从任何线程调用）。
- 未采用并行化处理。
参数
WindowHandleWindowHandleWindowHandleWindowHandlewindowHandlewindow_handle (输入控制) window → HWindow, HTupleHHandleHTupleHtuple (handle) (IntPtr) (HHandle) (handle)
窗口句柄。
RowInRowInRowInRowInrowInrow_in (输入控制) ellipse.center.y → HTuplefloatHTupleHtuple (real) (double) (double) (double)
中心列索引。
ColumnInColumnInColumnInColumnIncolumnIncolumn_in (输入控制) ellipse.center.x → HTuplefloatHTupleHtuple (real) (double) (double) (double)
中心列索引。
PhiInPhiInPhiInPhiInphiInphi_in (输入控制) ellipse.angle.rad → HTuplefloatHTupleHtuple (real) (double) (double) (double)
Orientation of the bigger half axis in radians.
Radius1InRadius1InRadius1InRadius1Inradius1Inradius_1in (输入控制) ellipse.radius1 → HTuplefloatHTupleHtuple (real) (double) (double) (double)
Bigger half axis.
Radius2InRadius2InRadius2InRadius2Inradius2Inradius_2in (输入控制) ellipse.radius2 → HTuplefloatHTupleHtuple (real) (double) (double) (double)
Smaller half axis.
RowRowRowRowrowrow (输出控制) ellipse.center.y → HTuplefloatHTupleHtuple (real) (double) (double) (double)
中心列索引。
ColumnColumnColumnColumncolumncolumn (输出控制) ellipse.center.x → HTuplefloatHTupleHtuple (real) (double) (double) (double)
中心列索引。
PhiPhiPhiPhiphiphi (输出控制) ellipse.angle.rad → HTuplefloatHTupleHtuple (real) (double) (double) (double)
Orientation of the first half axis in radians.
Radius1Radius1Radius1Radius1radius1radius_1 (输出控制) ellipse.radius1 → HTuplefloatHTupleHtuple (real) (double) (double) (double)
First half axis.
Radius2Radius2Radius2Radius2radius2radius_2 (输出控制) ellipse.radius2 → HTuplefloatHTupleHtuple (real) (double) (double) (double)
Second half axis.
示例（HDevelop）
read_image(Image,'monkey')
draw_ellipse_mod(WindowHandle,RowIn,ColumnIn,PhiIn,Radius1In,Radius2In,\
Row,Column,Phi,Radius1,Radius2)
gen_ellipse(Ellipse,Row,Column,Phi,Radius1,Radius2)
reduce_domain(Image,Ellipse,GrayEllipse)
sobel_amp(GrayEllipse,Sobel,'sum_abs',3)
dev_display(Sobel)
示例（C）
read_image(&Image,"monkey");
draw_ellipse_mod(WindowHandle,RowIn,ColumnIn,PhiIn,Radius1In,Radius2In,
&Row,&Column,&Phi,&Radius1,&Radius2);
gen_ellipse(&Ellipse,Row,Column,Phi,Radius1,Radius2);
reduce_domain(Image,Ellipse,&GrayEllipse);
sobel_amp(GrayEllipse,&Sobel,"sum_abs",3);
disp_image(Sobel,WindowHandle);
示例（HDevelop）
read_image(Image,'monkey')
draw_ellipse_mod(WindowHandle,RowIn,ColumnIn,PhiIn,Radius1In,Radius2In,\
Row,Column,Phi,Radius1,Radius2)
gen_ellipse(Ellipse,Row,Column,Phi,Radius1,Radius2)
reduce_domain(Image,Ellipse,GrayEllipse)
sobel_amp(GrayEllipse,Sobel,'sum_abs',3)
dev_display(Sobel)
示例（HDevelop）
read_image(Image,'monkey')
draw_ellipse_mod(WindowHandle,RowIn,ColumnIn,PhiIn,Radius1In,Radius2In,\
Row,Column,Phi,Radius1,Radius2)
gen_ellipse(Ellipse,Row,Column,Phi,Radius1,Radius2)
reduce_domain(Image,Ellipse,GrayEllipse)
sobel_amp(GrayEllipse,Sobel,'sum_abs',3)
dev_display(Sobel)
示例（HDevelop）
read_image(Image,'monkey')
draw_ellipse_mod(WindowHandle,RowIn,ColumnIn,PhiIn,Radius1In,Radius2In,\
Row,Column,Phi,Radius1,Radius2)
gen_ellipse(Ellipse,Row,Column,Phi,Radius1,Radius2)
reduce_domain(Image,Ellipse,GrayEllipse)
sobel_amp(GrayEllipse,Sobel,'sum_abs',3)
dev_display(Sobel)
结果
draw_ellipse_moddraw_ellipse_modDrawEllipseModDrawEllipseModDrawEllipseModdraw_ellipse_mod returns 2 (
H_MSG_TRUE)
, if the window is valid and the
needed drawing mode (see set_insertset_insertSetInsertSetInsertSetInsertset_insert) is available。如有必要，则抛出异常。
可能的前趋
open_windowopen_windowOpenWindowOpenWindowOpenWindowopen_window
可能的后继
reduce_domainreduce_domainReduceDomainReduceDomainReduceDomainreduce_domain,
disp_regiondisp_regionDispRegionDispRegionDispRegiondisp_region,
set_coloredset_coloredSetColoredSetColoredSetColoredset_colored,
set_line_widthset_line_widthSetLineWidthSetLineWidthSetLineWidthset_line_width,
set_drawset_drawSetDrawSetDrawSetDrawset_draw,
set_insertset_insertSetInsertSetInsertSetInsertset_insert
替代
draw_ellipsedraw_ellipseDrawEllipseDrawEllipseDrawEllipsedraw_ellipse,
draw_circledraw_circleDrawCircleDrawCircleDrawCircledraw_circle,
draw_regiondraw_regionDrawRegionDrawRegionDrawRegiondraw_region
另见
gen_ellipsegen_ellipseGenEllipseGenEllipseGenEllipsegen_ellipse,
draw_rectangle1draw_rectangle1DrawRectangle1DrawRectangle1DrawRectangle1draw_rectangle1,
draw_rectangle2draw_rectangle2DrawRectangle2DrawRectangle2DrawRectangle2draw_rectangle2,
draw_polygondraw_polygonDrawPolygonDrawPolygonDrawPolygondraw_polygon,
set_insertset_insertSetInsertSetInsertSetInsertset_insert
模块
基础