Illumination
Use the Illumination page (Figure 78) to set the light sources for the 3D view. Refer
to the Draw Guide for more details on setting the illumination.
Click any of the eight buttons to switch a directed light source on or off. By default,
the second light source is switched on. It is the first of seven normal, uniform light
sources. The first light source projects a specular light with highlights.
For the selected light source, you can then choose a color and intensity in the list just
below the eight buttons. The brightness values of all lights are added, so use dark
colors when you enable multiple lights.
Each light source always points at the middle of the object initially. To change the
position of the light source, use the small preview inside this page. It has two sliders
to set the vertical and horizontal position of the selected light source.
The button in the corner of the small preview switches the internal illumination
model between a sphere and a cube.
Use the Ambient light list to define the ambient light which shines with a uniform
intensity from all directions.
Rotating 3D charts interactively
In addition to using the Perspective page of the 3D View dialog to rotate 3D charts,
you can also rotate them interactively.
Select the Chart Wall, then hover the mouse pointer over a corner handle or the
rotation symbol found in the middle of the chart’s information grid. The cursor
changes to a rotation icon.
Press and hold the left mouse button and drag the corner in the direction you wish. A
dashed outline of the chart is visible while you drag, to help you see how the result
will look.
84 OpenOffice.org 3.3 Calc Guide
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