504
AutoCAD and Its Applications—Advanced
Copyright Goodheart-Willcox Co., Inc.
The
WEBLIGHT
or
LIGHT
command is used to create a weblight. You are prompted
for source and target locations. The Name,
Intensity
Factor, Status, Photometry, Shadow,
and
Filter Color
options work the same as the corresponding options for the previously
discussed lights. However, weblights have an additional
Web
option. When this option
is activated, these options are presented:
• File. Allows you to select an IES fi le.
• X. Rotates the web around the X axis.
• Y. Rotates the web around the Y axis.
• Z. Rotates the web around the Z axis.
• Exit. Exits the
Web
option.
Point and spotlights can be converted to weblights, and vice versa, using the
Properties
palette. Simply select an existing light and open the
Properties
palette. In
the
General
category, the
Type
property determines whether the light is a point light,
spotlight, or weblight. Select the type in the drop-down list. Using the
Properties
palette with lights is discussed in detail later in this chapter.
Free Weblight
A free weblight is the same as a standard weblight except there is no target. Only
the source location is specifi ed when placing the light. To change the location and
direction of the light, use the
ROTATE3D
and
3DMOVE
commands.
NOTE NOTE
To create either standard or free weblights, photometric lighting must
be enabled (LIGHTINGUNITS =
1
or 2).
Photometric Lights Tool Palette Group
Photometric lights may be easily added to the drawing using the tool palettes in
the
Photometric Lights
tool palette group. This palette group contains four palettes:
Fluorescent,
High Intensity
Discharge, Incandescent, and
Low Pressure
Sodium.
Lights created with these tools have preset properties for
Intensity
Factor, Shadow, and
Filter
Color. The long fl uorescent lights are weblights. The high intensity discharge,
low-pressure sodium, and regular incandescent lights are point lights. The incandes-
cent halogen lights are free spotlights. The recessed incandescent lights are a special
weblight designed for recessed light fi xtures.
Lights in Model and Properties Palettes
The
Lights in Model
palette is extremely useful for controlling the lights in your
scene, Figure 17-17. Using the
Lights in Model
palette in conjunction with the
Properties
palette, you can manage and edit all of the lights in a scene.
Lights in Model Palette
The
LIGHTLIST
command displays the
Lights in Model
palette. This palette can also
be displayed by picking the dialog box launcher button at the lower-right corner of the
Lights
panel on the
Visualize
tab of the ribbon. All user-created lights in the scene are
displayed in the list. To modify the properties of a light, either double-click on the light
name or right-click on it and select
Properties
from the shortcut menu. This opens the
Properties
palette. See Figure 17-18. If the
Properties
palette is already open, you can
simply select a light in the
Lights in Model
palette. You can select more than one light
by pressing the
[Ctrl]
key and selecting the names in the
Lights in Model
palette, which
allows you to change all of their settings at the same time. This is an excellent way to
make the lighting in your scene uniform or to control a series of lights with a single edit.
WEBLIGHT
Ribbon
Visualize
Lights
Weblight
Type
WEBLIGHT
LIGHT
FREEWEB
Type
FREEWEB
LIGHT
LIGHTLIST
Type
LIGHTLIST