Next: quit Up: Commands Previous: qspl Contents

##
qsur

       'qsur' <name>(optional) RETURN
       'w'|'a'|'b'|'i'|'r'|'1'-'9'|'g'|'q'|'u'|'s'|'S'

This keyword is used to create a surface (see also gsur). The user might specify a name in the command-line or by picking an existing surface with the key ``s''. For the definition three to five edges of the surface must be defined. To create a surface move the mouse pointer over the first line of the first edge and select it with the ``1'' key. If more than one line is necessary to define the first edge select the following ones one after the other with the ``1'' key. Each marked line is listed in the mother xterm. If all lines of the first edge are selected select the lines of the second edge by pressing the ``2'' key, then the third and eventually the fourth and fifth. The last selected line must match the first. All lines defining an edge will create a combined line (see lcmb) and this combined line will show up in the definition of the surface. Then generate the surface by pressing the ``g'' key and you might continue with the next surface. By default the interior of the surface is defined according to Coons [12] which is a blended function. But it can also follow an embedded NURBS surface. To relate the surface to an existing NURBS surface select the NURBS surface with the ``S'' key (uppercase). Or assign the blended function with the ``b'' key. To quit the command use the ``q'' key or use ``u'' to undo the last action.

It is also possible to measure distances between two pixels on the screen. Just press the key ``w'' on the positions of the two pixels. The distance is calculated in the scale of the displayed geometry.

Next: quit Up: Commands Previous: qspl Contents