draw_nurbs_interp_modT_draw_nurbs_interp_modDrawNurbsInterpModDrawNurbsInterpModdraw_nurbs_interp_mod (算子)

名称

draw_nurbs_interp_modT_draw_nurbs_interp_modDrawNurbsInterpModDrawNurbsInterpModdraw_nurbs_interp_mod — 使用插值交互式修改 NURBS 曲线。

警告

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

签名

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

描述

draw_nurbs_interp_moddraw_nurbs_interp_modDrawNurbsInterpModDrawNurbsInterpModDrawNurbsInterpModdraw_nurbs_interp_mod returns the contour ContOutContOutContOutContOutcontOutcont_out of a NURBS curve of degree DegreeDegreeDegreeDegreedegreedegree, which has been modified interactively by the user in the window WindowHandleWindowHandleWindowHandleWindowHandlewindowHandlewindow_handle。

In addition to ContOutContOutContOutContOutcontOutcont_out the control information of the curve (ControlRowsControlRowsControlRowsControlRowscontrolRowscontrol_rows, ControlColsControlColsControlColsControlColscontrolColscontrol_cols, and KnotsKnotsKnotsKnotsknotsknots), the interpolation points (RowsRowsRowsRowsrowsrows, ColsColsColsColscolscols) specified by the user and the tangents at the first and the last point (TangentsTangentsTangentsTangentstangentstangents) are returned. TangentsTangentsTangentsTangentstangentstangents 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""auto" as weight vector, if the control information is used in a subsequent call to the operator gen_contour_nurbs_xldgen_contour_nurbs_xldGenContourNurbsXldGenContourNurbsXldGenContourNurbsXldgen_contour_nurbs_xld。For more information on NURBS see the documentation of gen_contour_nurbs_xldgen_contour_nurbs_xldGenContourNurbsXldGenContourNurbsXldGenContourNurbsXldgen_contour_nurbs_xld。

The input curve is specified by the interpolation points (RowsInRowsInRowsInRowsInrowsInrows_in, ColsInColsInColsInColsIncolsIncols_in), its degree DegreeDegreeDegreeDegreedegreedegree and the tangents TangentsInTangentsInTangentsInTangentsIntangentsIntangents_in, such that draw_nurbs_interp_moddraw_nurbs_interp_modDrawNurbsInterpModDrawNurbsInterpModDrawNurbsInterpModdraw_nurbs_interp_mod can be applied to the output data of draw_nurbs_interpdraw_nurbs_interpDrawNurbsInterpDrawNurbsInterpDrawNurbsInterpdraw_nurbs_interp。

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 EditEditEditEditeditedit is set to 'true'"true""true""true""true""true". Similarly, you can only rotate, move or scale it if RotateRotateRotateRotaterotaterotate, MoveMoveMoveMovemovemove, and ScaleScaleScaleScalescalescale, respectively, are set to 'true'"true""true""true""true""true".

draw_nurbs_interp_moddraw_nurbs_interp_modDrawNurbsInterpModDrawNurbsInterpModDrawNurbsInterpModdraw_nurbs_interp_mod 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 RotateRotateRotateRotaterotaterotate is set to 'true'"true""true""true""true""true", and a double-headed arrow to the upper right if ScaleScaleScaleScalescalescale is set to 'true'"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

In this mode a NURBS curve can be rotated, moved and scaled, as long as the respective parameter RotateRotateRotateRotaterotaterotate, MoveMoveMoveMovemovemove and ScaleScaleScaleScalescalescale are set to 'true'"true""true""true""true""true". The NURBS curve is displayed along with a cross in its center, an arrow pointing to the right (if RotateRotateRotateRotaterotaterotate is set to 'true'"true""true""true""true""true"), and a double arrow (if ScaleScaleScaleScalescalescale is set to 'true'"true""true""true""true""true").

To move the curve, click with the left mouse button on the cross in the center and then drag it to the new position, i.e., keep the mouse button pressed while moving the mouse.
To rotate it, click with the left mouse button on the arrow and then drag it, till the curve has the right direction.
Scaling is achieved by dragging the double arrow. To keep the ratio, the parameter KeepRatioKeepRatioKeepRatioKeepRatiokeepRatiokeep_ratio has to be set to 'true'"true""true""true""true""true".

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:

To append new points, click with the left mouse button in the window and a new point is added at this position.
You can delete the point appended last by pressing the Ctrl key.
To move a point, drag it with the mouse.
To insert a point on the curve, click on the desired position on the curve.
To close respectively open the curve, click on the first or on the last point.

Pressing the right mouse button terminates the procedure.

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

注意

In contrast to draw_nurbsdraw_nurbsDrawNurbsDrawNurbsDrawNurbsdraw_nurbs, 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.

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

ContOutContOutContOutContOutcontOutcont_out (输出对象) xld_cont → object

Contour of the modified curve.

WindowHandleWindowHandleWindowHandleWindowHandlewindowHandlewindow_handle (输入控制) window → (handle)

窗口句柄。

RotateRotateRotateRotaterotaterotate (输入控制) string → (string)

Enable rotation?