draw_rectangle2T_draw_rectangle2DrawRectangle2DrawRectangle2 (Operator)


draw_rectangle2T_draw_rectangle2DrawRectangle2DrawRectangle2 — Interactive drawing of any orientated rectangle.


draw_rectangle2( : : WindowHandle : Row, Column, Phi, Length1, Length2)

Herror T_draw_rectangle2(const Htuple WindowHandle, Htuple* Row, Htuple* Column, Htuple* Phi, Htuple* Length1, Htuple* Length2)

void DrawRectangle2(const HTuple& WindowHandle, HTuple* Row, HTuple* Column, HTuple* Phi, HTuple* Length1, HTuple* Length2)

void HWindow::DrawRectangle2(double* Row, double* Column, double* Phi, double* Length1, double* Length2) const

static void HOperatorSet.DrawRectangle2(HTuple windowHandle, out HTuple row, out HTuple column, out HTuple phi, out HTuple length1, out HTuple length2)

void HWindow.DrawRectangle2(out double row, out double column, out double phi, out double length1, out double length2)


draw_rectangle2draw_rectangle2DrawRectangle2DrawRectangle2DrawRectangle2 returns the parameter for any orientated rectangle, which has been created interactively by the user in the window.

The created rectangle is described by its center, its two half axes and the angle between the first half axis and the horizontal coordinate axis.

To create a rectangle you have to press the left mouse button for the center of the rectangle. While keeping the button pressed you may dimension the length (Length1Length1Length1Length1length1) 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 middle of the created rectangle, you can move it. A click close to one side “grips” it to modify the rectangle's dimension in perpendicular direction to this side. You only can modify the orientation, if you grip a side perpendicular to the first half axis. Pressing the right mouse button terminates the procedure. On macOS draw_rectangle2draw_rectangle2DrawRectangle2DrawRectangle2DrawRectangle2 can also be terminated by pressing the escape key.

After terminating the procedure the rectangle is not visible in the window any longer.


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.

Execution Information


WindowHandleWindowHandleWindowHandleWindowHandlewindowHandle (input_control)  window HWindow, HTupleHTupleHtuple (handle) (IntPtr) (HHandle) (handle)

Window handle.

RowRowRowRowrow (output_control)  rectangle2.center.y HTupleHTupleHtuple (real) (double) (double) (double)

Row index of the center.

ColumnColumnColumnColumncolumn (output_control)  rectangle2.center.x HTupleHTupleHtuple (real) (double) (double) (double)

Column index of the center.

PhiPhiPhiPhiphi (output_control)  rectangle2.angle.rad HTupleHTupleHtuple (real) (double) (double) (double)

Orientation of the bigger half axis in radians.

Length1Length1Length1Length1length1 (output_control)  rectangle2.hwidth HTupleHTupleHtuple (real) (double) (double) (double)

Bigger half axis.

Length2Length2Length2Length2length2 (output_control)  rectangle2.hheight HTupleHTupleHtuple (real) (double) (double) (double)

Smaller half axis.


draw_rectangle2draw_rectangle2DrawRectangle2DrawRectangle2DrawRectangle2 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


Possible Successors

reduce_domainreduce_domainReduceDomainReduceDomainReduceDomain, disp_regiondisp_regionDispRegionDispRegionDispRegion, set_coloredset_coloredSetColoredSetColoredSetColored, set_line_widthset_line_widthSetLineWidthSetLineWidthSetLineWidth, set_drawset_drawSetDrawSetDrawSetDraw, set_insertset_insertSetInsertSetInsertSetInsert


draw_rectangle2_moddraw_rectangle2_modDrawRectangle2ModDrawRectangle2ModDrawRectangle2Mod, draw_rectangle1draw_rectangle1DrawRectangle1DrawRectangle1DrawRectangle1, draw_regiondraw_regionDrawRegionDrawRegionDrawRegion

See also

gen_rectangle2gen_rectangle2GenRectangle2GenRectangle2GenRectangle2, draw_circledraw_circleDrawCircleDrawCircleDrawCircle, draw_ellipsedraw_ellipseDrawEllipseDrawEllipseDrawEllipse, set_insertset_insertSetInsertSetInsertSetInsert