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Amiga Format 4
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Demos Corner
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Spheres.DOC
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1988-11-13
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Spheres
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by Ian Cackett
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Spheres is a raytraced animation of rotating mirrored spheres.
To begin the animation either click twice on its icon on the
Workbench screen or type 'Spheres' from the CLI.
To end the animation at any time simply click the left mouse button.
The individual frames were raytraced using Eric Graham's SSG (Scene
Simulation Generator). This simulates the rays of light within a scene
and creates shadows and reflections as they would appear in the real world.
Each frame was compressed using FrameClip, a utility of mine which
works out the differences between each frame and the one before and stores
only these. This means that only the first frame needs to be stored
completely and the others are reduced to just over 7K each.
The compressed frames were merged into one file which is played back
by Spheres using hold and modify mode to allow a greater number of colours
to be displayed at one time.
NOTE:- The files 'firstframe' and 'otherframes' must be present in the root
directory of the disk for Spheres to work.