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• An x value of 90, with y and z set to 0, provides a view from the top of the

chart. With x set to –90, the view is from the bottom of the chart.

• The rotations are applied in the following order: x first, then y, and z last.

• When shading is enabled and you rotate a chart, the lights are rotated as if

they are fixed to the chart.

• The rotation axes always relate to the page, not to the chart’s axes. This is

different from some other chart programs.

• Select the Perspective option to view the chart in central perspective as

through a camera lens instead of using a parallel projection.

• Set the focus length in the box next to the Perspective option (it becomes

active when you select the option). 100% gives a perspective view where a far

edge in the chart looks approximately half as big as a near edge.

Appearance

Use the Appearance page to modify some aspects of a 3D chart’s appearance.

Figure 77: Modifying appearance of 3D chart

Select a scheme from the list box. When you select a scheme, the options and the

light sources are set accordingly. If you select or deselect a combination of options

that is not given by the Realistic or Simple schemes, you can create a Custom

scheme.

Select Shading to use the Gouraud method for rendering the surface, which applies

gradients for a smoother, more realistic look. Otherwise, a flat method is used. The

flat method sets a single color and brightness for each polygon. The edges are visible,

soft gradients and spot lights are not possible. Refer to the Draw Guide for more

details on shading.

Select Object Borders to draw lines along the edges.

Select Rounded Edges to smooth the edges of box shapes. In some cases this option

is not available.

Chapter 3 Creating Charts and Graphs 83

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OpenOffice.org OpenOffice - 3.3 Guía básica Pagina 83