Autodesk LIGHTSCAPE Manual page 105

Reversing Surfaces
You can reverse selected surfaces so that they are
properly oriented, or you can automatically reverse
all surfaces displayed in the Graphic window that are
facing away from you.
To reverse the orientation of selected surfaces:
In the model, select the surfaces that you want to
1.
reverse.
Choose Tools | Orient Surfaces.
2.
The Surface Orientation dialog appears, and
surfaces that are facing away from you in the current
view are highlighted in bright green. Adjust your
view and use the Near Clip Plane slider if required.
In the Surface Orientation dialog, click Reverse.
3.
The selected surfaces are reversed.
To reverse additional surfaces, select them in the
Graphic window, and click Reverse in the Surface
Orientation dialog.
To automatically reverse all the surfaces that are
facing away from you:
In the Surface Orientation dialog, click Auto Orient.
All the surfaces that are facing away from you in the
current view are reversed.
Orienting Surfaces Using a Focus Point
You can orient selected surfaces to face away from or
toward a focus point.
Lightscape determines the orientation of surfaces
oblique to the focus point by extending the plane of
that surface. Notice how the slight difference in the
placement of the focus point in the following illus-
tration produces very different results.
FOC_OUT FOC_IN
You can also set focus points in your modeling
program if your program supports block output in a
DXF file. This can minimize the amount of reorien-
tation work required once the model is imported
into Lightscape. For more information, see "Using
Orientation Blocks" on page 61.
To orient a surface using a focus point:
In the model, select a surface, right-click and
1.
choose Orientation. Or choose Tools | Orient Sur-
faces.
Surfaces that are facing away from you in the current
view are highlighted in bright green. Adjust your
view and use the Near Clip Plane slider if required.
Select the surfaces that you want to orient.
2.
Type the coordinates of the focus point in the X,
3.
Y and Z boxes, or enable Pick and then click a point
in the model to set the position of the focus point.
In the Graphic window, yellow crosshairs indicate
the position of the focus point.
In the Surface Orientation dialog, do one of the
4.
following to orient the selected surfaces:
Working with Surfaces
FOC_IN
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