draw_nurbs_interp_modT_draw_nurbs_interp_modDrawNurbsInterpModDrawNurbsInterpMod (Operator)

Name

draw_nurbs_interp_modT_draw_nurbs_interp_modDrawNurbsInterpModDrawNurbsInterpMod — Interactive modification of a NURBS curve using interpolation.

Warning

This operator does not work in an HDevelop graphics window opened with dev_open_window.

Signature

draw_nurbs_interp_mod( : ContOut : WindowHandle, Rotate, Move, Scale, KeepRatio, Edit, Degree, RowsIn, ColsIn, TangentsIn : ControlRows, ControlCols, Knots, Rows, Cols, Tangents)

Herror T_draw_nurbs_interp_mod(Hobject* ContOut, const Htuple WindowHandle, const Htuple Rotate, const Htuple Move, const Htuple Scale, const Htuple KeepRatio, const Htuple Edit, const Htuple Degree, const Htuple RowsIn, const Htuple ColsIn, const Htuple TangentsIn, Htuple* ControlRows, Htuple* ControlCols, Htuple* Knots, Htuple* Rows, Htuple* Cols, Htuple* Tangents)

void DrawNurbsInterpMod(HObject* ContOut, const HTuple& WindowHandle, const HTuple& Rotate, const HTuple& Move, const HTuple& Scale, const HTuple& KeepRatio, const HTuple& Edit, const HTuple& Degree, const HTuple& RowsIn, const HTuple& ColsIn, const HTuple& TangentsIn, HTuple* ControlRows, HTuple* ControlCols, HTuple* Knots, HTuple* Rows, HTuple* Cols, HTuple* Tangents)

void HXLDCont::DrawNurbsInterpMod(const HWindow& WindowHandle, const HString& Rotate, const HString& Move, const HString& Scale, const HString& KeepRatio, const HString& Edit, Hlong Degree, const HTuple& RowsIn, const HTuple& ColsIn, const HTuple& TangentsIn, HTuple* ControlRows, HTuple* ControlCols, HTuple* Knots, HTuple* Rows, HTuple* Cols, HTuple* Tangents)

void HXLDCont::DrawNurbsInterpMod(const HWindow& WindowHandle, const char* Rotate, const char* Move, const char* Scale, const char* KeepRatio, const char* Edit, Hlong Degree, const HTuple& RowsIn, const HTuple& ColsIn, const HTuple& TangentsIn, HTuple* ControlRows, HTuple* ControlCols, HTuple* Knots, HTuple* Rows, HTuple* Cols, HTuple* Tangents)

void HXLDCont::DrawNurbsInterpMod(const HWindow& WindowHandle, const wchar_t* Rotate, const wchar_t* Move, const wchar_t* Scale, const wchar_t* KeepRatio, const wchar_t* Edit, Hlong Degree, const HTuple& RowsIn, const HTuple& ColsIn, const HTuple& TangentsIn, HTuple* ControlRows, HTuple* ControlCols, HTuple* Knots, HTuple* Rows, HTuple* Cols, HTuple* Tangents)   (Windows only)

HXLDCont HWindow::DrawNurbsInterpMod(const HString& Rotate, const HString& Move, const HString& Scale, const HString& KeepRatio, const HString& Edit, Hlong Degree, const HTuple& RowsIn, const HTuple& ColsIn, const HTuple& TangentsIn, HTuple* ControlRows, HTuple* ControlCols, HTuple* Knots, HTuple* Rows, HTuple* Cols, HTuple* Tangents) const

HXLDCont HWindow::DrawNurbsInterpMod(const char* Rotate, const char* Move, const char* Scale, const char* KeepRatio, const char* Edit, Hlong Degree, const HTuple& RowsIn, const HTuple& ColsIn, const HTuple& TangentsIn, HTuple* ControlRows, HTuple* ControlCols, HTuple* Knots, HTuple* Rows, HTuple* Cols, HTuple* Tangents) const

HXLDCont HWindow::DrawNurbsInterpMod(const wchar_t* Rotate, const wchar_t* Move, const wchar_t* Scale, const wchar_t* KeepRatio, const wchar_t* Edit, Hlong Degree, const HTuple& RowsIn, const HTuple& ColsIn, const HTuple& TangentsIn, HTuple* ControlRows, HTuple* ControlCols, HTuple* Knots, HTuple* Rows, HTuple* Cols, HTuple* Tangents) const   (Windows only)

static void HOperatorSet.DrawNurbsInterpMod(out HObject contOut, HTuple windowHandle, HTuple rotate, HTuple move, HTuple scale, HTuple keepRatio, HTuple edit, HTuple degree, HTuple rowsIn, HTuple colsIn, HTuple tangentsIn, out HTuple controlRows, out HTuple controlCols, out HTuple knots, out HTuple rows, out HTuple cols, out HTuple tangents)

void HXLDCont.DrawNurbsInterpMod(HWindow windowHandle, string rotate, string move, string scale, string keepRatio, string edit, int degree, HTuple rowsIn, HTuple colsIn, HTuple tangentsIn, out HTuple controlRows, out HTuple controlCols, out HTuple knots, out HTuple rows, out HTuple cols, out HTuple tangents)

HXLDCont HWindow.DrawNurbsInterpMod(string rotate, string move, string scale, string keepRatio, string edit, int degree, HTuple rowsIn, HTuple colsIn, HTuple tangentsIn, out HTuple controlRows, out HTuple controlCols, out HTuple knots, out HTuple rows, out HTuple cols, out HTuple tangents)

Description

draw_nurbs_interp_moddraw_nurbs_interp_modDrawNurbsInterpModDrawNurbsInterpModDrawNurbsInterpMod returns the contour ContOutContOutContOutContOutcontOut of a NURBS curve of degree DegreeDegreeDegreeDegreedegree, which has been modified interactively by the user in the window WindowHandleWindowHandleWindowHandleWindowHandlewindowHandle.

In addition to ContOutContOutContOutContOutcontOut the control information of the curve (ControlRowsControlRowsControlRowsControlRowscontrolRows, ControlColsControlColsControlColsControlColscontrolCols, and KnotsKnotsKnotsKnotsknots), the interpolation points (RowsRowsRowsRowsrows, ColsColsColsColscols) specified by the user and the tangents at the first and the last point (TangentsTangentsTangentsTangentstangents) are returned. TangentsTangentsTangentsTangentstangents consists of four values. The first two values correspond to the y (row) and the x (column) value of the tangent at the start of the curve and the second two values to the tangent at the end of the curve, respectively.

The weight vector is not returned because it consists of equal entries. As a consequence one can use 'auto'"auto""auto""auto""auto" as weight vector, if the control information is used in a subsequent call to the operator gen_contour_nurbs_xldgen_contour_nurbs_xldGenContourNurbsXldGenContourNurbsXldGenContourNurbsXld. For more information on NURBS see the documentation of gen_contour_nurbs_xldgen_contour_nurbs_xldGenContourNurbsXldGenContourNurbsXldGenContourNurbsXld.

The input curve is specified by the interpolation points (RowsInRowsInRowsInRowsInrowsIn, ColsInColsInColsInColsIncolsIn), its degree DegreeDegreeDegreeDegreedegree and the tangents TangentsInTangentsInTangentsInTangentsIntangentsIn, such that draw_nurbs_interp_moddraw_nurbs_interp_modDrawNurbsInterpModDrawNurbsInterpModDrawNurbsInterpMod can be applied to the output data of draw_nurbs_interpdraw_nurbs_interpDrawNurbsInterpDrawNurbsInterpDrawNurbsInterp.

You can modify the curve in two ways: by editing the interpolation points, e.g., by inserting or moving points, or by transforming the curve as a whole, e.g., by rotating moving or scaling it. Note that you can only edit the curve if EditEditEditEditedit is set to 'true'"true""true""true""true". Similarly, you can only rotate, move or scale it if RotateRotateRotateRotaterotate, MoveMoveMoveMovemove, and ScaleScaleScaleScalescale, respectively, are set to 'true'"true""true""true""true".

draw_nurbs_interp_moddraw_nurbs_interp_modDrawNurbsInterpModDrawNurbsInterpModDrawNurbsInterpMod starts in the transformation mode. In this mode, the curve is displayed together with 3 symbols: a cross in the middle and an arrow to the right if RotateRotateRotateRotaterotate is set to 'true'"true""true""true""true", and a double-headed arrow to the upper right if ScaleScaleScaleScalescale is set to 'true'"true""true""true""true". To switch into the edit mode, press the Shift key; by pressing it again, you can switch back into the transformation mode.

Transformation Mode

Edit Mode

In this mode, the curve is displayed together with its interpolation points and the start and end tangent. Start and end point are marked by an additional square. You can perform the following modifications:

Pressing the right mouse button terminates the procedure. On macOS draw_nurbs_interp_moddraw_nurbs_interp_modDrawNurbsInterpModDrawNurbsInterpModDrawNurbsInterpMod can also be terminated by pressing the escape key.

The appearance of the curve while drawing is determined by the line width, size and color set via the operators set_colorset_colorSetColorSetColorSetColor, set_coloredset_coloredSetColoredSetColoredSetColored, set_line_widthset_line_widthSetLineWidthSetLineWidthSetLineWidth, and set_line_styleset_line_styleSetLineStyleSetLineStyleSetLineStyle. The tangents and all handles are displayed in the second color set by set_colorset_colorSetColorSetColorSetColor or set_coloredset_coloredSetColoredSetColoredSetColored. Their line width is fixed to 1 and their line style is fixed to a drawn-through line.

Attention

In contrast to draw_nurbsdraw_nurbsDrawNurbsDrawNurbsDrawNurbs, each point specified by the user influences the whole curve. Thus, if one point is moved, the whole curve can and will change. To minimize this effects, it is recommended to use a small degree (3-5) and to place the points such that they are approximately equally spaced. In general, uneven degrees will perform slightly better than even degrees.

Execution Information

Parameters

ContOutContOutContOutContOutcontOut (output_object)  xld_cont objectHXLDContHXLDContHobject *

Contour of the modified curve.

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

Window handle.

RotateRotateRotateRotaterotate (input_control)  string HTupleHTupleHtuple (string) (string) (HString) (char*)

Enable rotation?

Default value: 'true' "true" "true" "true" "true"

List of values: 'false'"false""false""false""false", 'true'"true""true""true""true"

MoveMoveMoveMovemove (input_control)  string HTupleHTupleHtuple (string) (string) (HString) (char*)

Enable moving?

Default value: 'true' "true" "true" "true" "true"

List of values: 'false'"false""false""false""false", 'true'"true""true""true""true"

ScaleScaleScaleScalescale (input_control)  string HTupleHTupleHtuple (string) (string) (HString) (char*)

Enable scaling?

Default value: 'true' "true" "true" "true" "true"

List of values: 'false'"false""false""false""false", 'true'"true""true""true""true"

KeepRatioKeepRatioKeepRatioKeepRatiokeepRatio (input_control)  string HTupleHTupleHtuple (string) (string) (HString) (char*)

Keep ratio while scaling?

Default value: 'true' "true" "true" "true" "true"

List of values: 'false'"false""false""false""false", 'true'"true""true""true""true"

EditEditEditEditedit (input_control)  string HTupleHTupleHtuple (string) (string) (HString) (char*)

Enable editing?

Default value: 'true' "true" "true" "true" "true"

List of values: 'false'"false""false""false""false", 'true'"true""true""true""true"

DegreeDegreeDegreeDegreedegree (input_control)  integer HTupleHTupleHtuple (integer) (int / long) (Hlong) (Hlong)

The degree p of the NURBS curve. Reasonable values are 3 to 5.

Default value: 3

Suggested values: 2, 3, 4, 5

Restriction: Degree >= 2 && Degree <= 9

RowsInRowsInRowsInRowsInrowsIn (input_control)  coordinates.y-array HTupleHTupleHtuple (real) (double) (double) (double)

Row coordinates of the input interpolation points.

ColsInColsInColsInColsIncolsIn (input_control)  coordinates.x-array HTupleHTupleHtuple (real) (double) (double) (double)

Column coordinates of the input interpolation points.

TangentsInTangentsInTangentsInTangentsIntangentsIn (input_control)  real-array HTupleHTupleHtuple (real) (double) (double) (double)

Input tangents.

ControlRowsControlRowsControlRowsControlRowscontrolRows (output_control)  coordinates.y-array HTupleHTupleHtuple (real) (double) (double) (double)

Row coordinates of the control polygon.

ControlColsControlColsControlColsControlColscontrolCols (output_control)  coordinates.x-array HTupleHTupleHtuple (real) (double) (double) (double)

Column coordinates of the control polygon.

KnotsKnotsKnotsKnotsknots (output_control)  real-array HTupleHTupleHtuple (real) (double) (double) (double)

Knot vector.

RowsRowsRowsRowsrows (output_control)  coordinates.y-array HTupleHTupleHtuple (real) (double) (double) (double)

Row coordinates of the points specified by the user.

ColsColsColsColscols (output_control)  coordinates.x-array HTupleHTupleHtuple (real) (double) (double) (double)

Column coordinates of the points specified by the user.

TangentsTangentsTangentsTangentstangents (output_control)  real-array HTupleHTupleHtuple (real) (double) (double) (double)

Tangents specified by the user.

Result

draw_nurbs_interp_moddraw_nurbs_interp_modDrawNurbsInterpModDrawNurbsInterpModDrawNurbsInterpMod returns 2 (H_MSG_TRUE), if the window is valid. If necessary, an exception is raised.

Possible Predecessors

open_windowopen_windowOpenWindowOpenWindowOpenWindow

Possible Successors

set_coloredset_coloredSetColoredSetColoredSetColored, set_line_widthset_line_widthSetLineWidthSetLineWidthSetLineWidth, set_drawset_drawSetDrawSetDrawSetDraw, set_insertset_insertSetInsertSetInsertSetInsert

Alternatives

draw_xld_moddraw_xld_modDrawXldModDrawXldModDrawXldMod, draw_nurbs_moddraw_nurbs_modDrawNurbsModDrawNurbsModDrawNurbsMod

See also

draw_nurbs_interpdraw_nurbs_interpDrawNurbsInterpDrawNurbsInterpDrawNurbsInterp, gen_contour_nurbs_xldgen_contour_nurbs_xldGenContourNurbsXldGenContourNurbsXldGenContourNurbsXld

Module

Foundation