draw_nurbs_modT_draw_nurbs_modDrawNurbsModDrawNurbsModdraw_nurbs_mod (算子)

名称

draw_nurbs_modT_draw_nurbs_modDrawNurbsModDrawNurbsModdraw_nurbs_mod — 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_mod( : ContOut : WindowHandle, Rotate, Move, Scale, KeepRatio, Edit, Degree, RowsIn, ColsIn, WeightsIn : Rows, Cols, Weights)

描述

draw_nurbs_moddraw_nurbs_modDrawNurbsModDrawNurbsModDrawNurbsModdraw_nurbs_mod returns the contour ContOutContOutContOutContOutcontOutcont_out and control information (RowsRowsRowsRowsrowsrows, ColsColsColsColscolscols, and WeightsWeightsWeightsWeightsweightsweights) of a NURBS curve of degree DegreeDegreeDegreeDegreedegreedegree, which has been interactively modified by the user in the window WindowHandleWindowHandleWindowHandleWindowHandlewindowHandlewindow_handle. For additional information concerning NURBS curves, see the documentation of gen_contour_nurbs_xldgen_contour_nurbs_xldGenContourNurbsXldGenContourNurbsXldGenContourNurbsXldgen_contour_nurbs_xld。To use the control information RowsRowsRowsRowsrowsrows, ColsColsColsColscolscols, and WeightsWeightsWeightsWeightsweightsweights in a subsequent call to the operator gen_contour_nurbs_xldgen_contour_nurbs_xldGenContourNurbsXldGenContourNurbsXldGenContourNurbsXldgen_contour_nurbs_xld, the knot vector KnotsKnotsKnotsKnotsknotsknots should be set to 'auto'"auto""auto""auto""auto""auto".

The input NURBS curve is specified by its control polygon (RowsInRowsInRowsInRowsInrowsInrows_in, ColsInColsInColsInColsIncolsIncols_in), its weight vector WeightsInWeightsInWeightsInWeightsInweightsInweights_in and its degree DegreeDegreeDegreeDegreedegreedegree. The knot vector is assumed to be uniform (i.e. 'auto'"auto""auto""auto""auto""auto" in gen_contour_nurbs_xldgen_contour_nurbs_xldGenContourNurbsXldGenContourNurbsXldGenContourNurbsXldgen_contour_nurbs_xld).

You can modify the curve in two ways: by editing the control polygon, e.g., by inserting or moving control points, or by transforming the contour as a whole, e.g., by rotating moving or scaling it. Note that you can only edit the control polygon 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_moddraw_nurbs_modDrawNurbsModDrawNurbsModDrawNurbsModdraw_nurbs_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 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 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 control polygon. Start and end point are marked by an additional square and the point which was handled last is surrounded by a circle representing its weight. You can perform the following modifications:

To append control 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 control polygon, click on the desired position on the polygon.
To close respectively open the curve, click on the first or on the last control point.
You can modify the weight of a control point by first clicking on the point itself (if it is not already the point which was modified or created last) and then dragging the circle around the 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 control polygon 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.

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?