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Using the sectioning window

To open the sectioning window:

  1. Select from the menu Tools > Section...

section snapshot

Section controls

Draw section
If checked, the section is drawn on the surface of the model.
Draw section cap
If checked, polygons are calculated to cover the openings in the model induced by sectioning. This presently uses an algorithm that assumes the polygons do not contain holes, so if there should be holes the visual effects might be peculiar.
Clip against section
If checked, the model is clipped against the secton. Only the part of the model on one side of the plane is drawn.
Reverse the clip
This checkbox controls if part of the model on the positive side or negative side of the sectioning plane is drawn, when "Clip against section" is checked.
Sectioning plane a,b,c,d
The sectioning plane is defined by the equation a*x+b*y+c*z=d. Values of the coefficients may be entered in the textboxes or use the buttons "x=d", "y=d", or "z=d" to set up the appropriate equation.
Slider for d
This slider provides analog control of the sectioning plane. You can press the Set to model range button to set the slider range so that it corresponds to the range of values for which the sectioning plane actually intersects the mode.
Section defines xy plane
If unchecked the new model uses the original (x,y,z) coordinates. If checked the new model uses coordinates (x',y',z') obtained by a rigid-body rotation.
Project section to xy plane
If the "Section defines xy plane" checkbox is checked, then checking this checkbox additionally projects to coordinates (x',y',0).
Include section perimeter
If checked, the line segments defining the section perimeter will be included in the data to be exported.
Include section cap
If checked, the section cap (if drawn) will be included in the data to be exported.
Write to DXF file
This button prompts for the name of a file and saves a new model containing the specified section data to the file.
Make new model
This button creates a new DXF model based on the specified section data.