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- Put this section before "Different packages available"
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- What about animation?
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- A rendered scene can be impressive, but images really start
- to come alive when they are animated. A moving scene has
- real depth, with objects in the foreground moving faster
- than objects in the background.
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- Most rendering packages are designed to deal with
- animations. They allow objects to be "key framed": for
- example, in frame 1 a car may be on the left of the screen.
- In frame 100 it may be on the right. The in-between frames
- are calculated by the rendering software.
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- There's a lot more to it than that of course. Cameras and
- light sources can move too: your camera can fly through a
- cityscape for example, whilst the sun rises and sets. Or the
- objects themselves can change over time: altering their
- shape, colour and textures.
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- The best rendering packages allow objects to more in
- realistic ways by allowing them to be linked in a hierarchy:
- for example, given a human hand object constructed from a
- disk and five cylinders, it should be possible to move the
- hand in one go rather than having to move all the parts
- individually.
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