ClassesClasses | | Operators

draw_ellipse_moddraw_ellipse_modDrawEllipseModDrawEllipseMod (Operator)

Name

draw_ellipse_moddraw_ellipse_modDrawEllipseModDrawEllipseMod — Interactive drawing of an ellipse.

Signature

draw_ellipse_mod( : : WindowHandle, RowIn, ColumnIn, PhiIn, Radius1In, Radius2In : Row, Column, Phi, Radius1, Radius2)

Herror draw_ellipse_mod(const Hlong WindowHandle, double RowIn, double ColumnIn, double PhiIn, double Radius1In, double Radius2In, double* Row, double* Column, double* Phi, double* Radius1, double* Radius2)

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)

Description

draw_ellipse_moddraw_ellipse_modDrawEllipseModDrawEllipseModDrawEllipseMod 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 RowInRowInRowInRowInrowIn, ColumnInColumnInColumnInColumnIncolumnIn,PhiInPhiInPhiInPhiInphiIn,Radius1InRadius1InRadius1InRadius1Inradius1In,Radius2InRadius2InRadius2InRadius2Inradius2In. Keeping the button pressed determines the length (Radius1Radius1Radius1Radius1radius1) and the orientation (PhiPhiPhiPhiphi) 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. On macOS draw_ellipse_moddraw_ellipse_modDrawEllipseModDrawEllipseModDrawEllipseMod can also be terminated by pressing the escape key. After terminating the procedure the ellipse is not visible in the window any longer.

Execution Information

Parameters

WindowHandleWindowHandleWindowHandleWindowHandlewindowHandle (input_control)  window HWindow, HTupleHTupleHtuple (integer) (IntPtr) (Hlong) (Hlong)

Window handle.

RowInRowInRowInRowInrowIn (input_control)  ellipse.center.y HTupleHTupleHtuple (real) (double) (double) (double)

Row index of the center.

ColumnInColumnInColumnInColumnIncolumnIn (input_control)  ellipse.center.x HTupleHTupleHtuple (real) (double) (double) (double)

Column index of the center.

PhiInPhiInPhiInPhiInphiIn (input_control)  ellipse.angle.rad HTupleHTupleHtuple (real) (double) (double) (double)

Orientation of the bigger half axis in radians.

Radius1InRadius1InRadius1InRadius1Inradius1In (input_control)  ellipse.radius1 HTupleHTupleHtuple (real) (double) (double) (double)

Bigger half axis.

Radius2InRadius2InRadius2InRadius2Inradius2In (input_control)  ellipse.radius2 HTupleHTupleHtuple (real) (double) (double) (double)

Smaller half axis.

RowRowRowRowrow (output_control)  ellipse.center.y HTupleHTupleHtuple (real) (double) (double) (double)

Row index of the center.

ColumnColumnColumnColumncolumn (output_control)  ellipse.center.x HTupleHTupleHtuple (real) (double) (double) (double)

Column index of the center.

PhiPhiPhiPhiphi (output_control)  ellipse.angle.rad HTupleHTupleHtuple (real) (double) (double) (double)

Orientation of the first half axis in radians.

Radius1Radius1Radius1Radius1radius1 (output_control)  ellipse.radius1 HTupleHTupleHtuple (real) (double) (double) (double)

First half axis.

Radius2Radius2Radius2Radius2radius2 (output_control)  ellipse.radius2 HTupleHTupleHtuple (real) (double) (double) (double)

Second half axis.

Example (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)

Example (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) ;

Example (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)

Example (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)

Example (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)

Result

draw_ellipse_moddraw_ellipse_modDrawEllipseModDrawEllipseModDrawEllipseMod returns 2 (H_MSG_TRUE), if the window is valid and the needed drawing mode (see set_insertset_insertSetInsertSetInsertSetInsert) is available. If necessary, an exception is raised.

Possible Predecessors

open_windowopen_windowOpenWindowOpenWindowOpenWindow

Possible Successors

reduce_domainreduce_domainReduceDomainReduceDomainReduceDomain, disp_regiondisp_regionDispRegionDispRegionDispRegion, set_coloredset_coloredSetColoredSetColoredSetColored, set_line_widthset_line_widthSetLineWidthSetLineWidthSetLineWidth, set_drawset_drawSetDrawSetDrawSetDraw, set_insertset_insertSetInsertSetInsertSetInsert

Alternatives

draw_ellipsedraw_ellipseDrawEllipseDrawEllipseDrawEllipse, draw_circledraw_circleDrawCircleDrawCircleDrawCircle, draw_regiondraw_regionDrawRegionDrawRegionDrawRegion

See also

gen_ellipsegen_ellipseGenEllipseGenEllipseGenEllipse, draw_rectangle1draw_rectangle1DrawRectangle1DrawRectangle1DrawRectangle1, draw_rectangle2draw_rectangle2DrawRectangle2DrawRectangle2DrawRectangle2, draw_polygondraw_polygonDrawPolygonDrawPolygonDrawPolygon, set_insertset_insertSetInsertSetInsertSetInsert

Module

Foundation


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