Autodesk LIGHTSCAPE, Manual

Page: 172 / 362

Daylight 10
164
Lightscape
3.
Click the Direct Control tab.
4.
Set the Rotation and Elevation of the sun by
dragging the orange handles in their respective con-
trols.
Rotation values can be from 0
°
to 360
°
. The Rotation
control is viewed from the top.
Elevation values can be from 0
°
to 90
°
. The Eleva-
tion control is viewed from the side.
Note: You can also enter rotation and elevation
values in the corresponding boxes.
5.
Adjust the Sun Illuminance slider. The valid
range is between 0 to 131,835 lx (or between 0 and
12,247 fc).
6.
Click OK or Apply to save the settings.
Setting Sunlight Direction Using Place
and Time
Designers often want to know the effect of daylight
at a specific time of day on a specific date. To accu-
rately calculate this, you first must indicate the
location and orientation of your model on the Earth,
and then set the time and date.
Setting the Location and Orientation
You can specify the orientation of your model in
space by indicating which direction is North. This
setting affects how daylight enters your model. You
can then choose where the model is located on the
Earth.
To set the location and orientation of the model:
1.
Choose View | Projection | Top or click the Top
button to view your model from above.
2.
Choose Light | Daylight.
The Daylight Setup dialog appears.
3.
Disable Direct Control.
4.
Click the Place tab.
5. Adjust the arrow in the North dial (or type a val-
ue in the North box) so that it points in the direction
you want to specify as North in relation to a top view.
Note: The North dial indicates the northerly direc-
tion relative to a top view of the model.
Rotation control Elevation control
North dial
Top view of model illustrating
the northerly direction based on
the position of the North dial
(shown at right).