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Crossection Editor
Cross-section View
The cross-section View displays cross-section of the model at the current
cross position. Selection of a point in Cross-section View
highlights the correspondent curve in 3D View. When the base has more
than 2 point this 3D curve consists of joined segments. In default case of 2 base
points there is only one 3D segment.
When the user modifies a point in the Cross Editor, correspondent 3D curve will
be updated. This modification depends on
whether the current cross-object coincides with one of the base knots. In case when
the current cross position does not coincide with any knots and selected 3D
curve is a straight line, modification of its cross-section translates the line in
3D otherwise it changes its shape. When the current cross position coincides with one of the base
knots (or equivalently the cross-section plane contains one of the curve's ends) modification of
cross-section of the curve changes position of its end. We suggest to experiment with 3D Debugger
to see affect of the cross position on cross-section modifications.
Available commands:
A new segment can be added by executing "Break" and "Change Class" commands.
"Break" command divides a segment in two. To
break a segment press Break button on the Command page of the Form and click the
segment at the point, where you would like to break it.
"Delete" command is equivalent to pressing delete key. Result
of this command depends on the currently selected object and the configuration
of the strip. See Delete Commands for details. Note that strip in a 2D editor is assumed to
be connected at all times, that is why deleting a middle segment from a non-closed strip will delete the rest of the strip. This will not happen
in case of deleting an end segment from a non-closed strip.
 "Add" command will create a new joint in the current strip (strip of
patches in case of 3DO or strip of revolved 2D lines in case of SOR) by
extending one if its ends. Press the button and click on a point in
Cross-section View to insert a new joint. If the strip has more than one end,
one of them has to be selected prior to this command. If the strip has at least
one joint a new segment connecting the new point will be created. If the strip
was empty prior to this command, a single point will be added to the strip.
"Close Loop" command from the Command Page adds a new straight segment
which joins ends of the current strip to make it closed. "Close loop"
command does not have any effect for strips which consist of a single
segment.
The Context Menu (right mouse button) also has "Strip Order" command.
This command will display indexes of joint points in the strip. To remove the numbers click anywhere in the window.
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