5.15. Ellipse (media-object)

5.15.1. Attributes

5.15.2. Description

This element defines a ellipse parallel to the xOz plane. It is used either as an autonomous geometrical component in a scene, or as a elliptical path in a ellipse transformation.

The float values of the x, y, and z attributes define the coordinates of the ellipse center P. The float values a and b of the a and and b attributes define the length of the x-axis (2×a) and the z-axis (2×b). The float value of the width attribute defines the width of the ellipse (an elliptical crown); it must be set to 0 for an invisible ellipse. The integer value of the segments attribute is the number of steps that will be used to build the mesh of the ellipse when rendering it.

5.15.3. Expected child

None.

5.15.4. Example

The example below defines a textured ellipse centered at (0, 0, 0) with 30 as x-length, 22 as z-length, and width 10.0. It is drawn in 100 steps.

<node id = "saturn">
  <ellipse id = "saturn" segments = "100" a = "15" b = "11" 
              x = "0" y = "0" z = "0" width = "10">
    <texture encoding = "png" xlink:href = "saturn.png"/>
  </ellipse>
</node>