User manual

Figure 4. Image illustrating replacement of gobo wheels in a projector, illustrating their placement in it (Martin Mac
2000 spot projector user manual, from Ref.[1] )
Certain projectors also allow for rotation of individual gobos, and mixing of
patterns from gobos placed on several wheels - and the possibility of controlling all
this via DMX is there as well. The importance of choice of gobos in light design is just
as big as the importance of choice of colour of a given projector, so it has to be taken
into account into the web interface. Besides, it can be easily assumed that pupils will
find an interface allowing possibility of programming patterns of light, much more
interesting than just the option of changing colour – and every feature that might
increase their motivation is of importance, as it may be expected that in that age, some
teenagers may find the task of programming lights overwhelming. However, realistic
modelling of light cones and rotating gobos reflecting from 3D model surface is
definitely not something that can be expected to be a part of the standard
programming interfaces of 3D engines: although a “spot light”, a model of light with a
spread cone which does model projector spotlights, is a common lighting model in
many a 3D graphic cards and programming environments, its use is usually limited,
and it can be hardly expected that it provides for something similar to gobo patterns.
Hence a custom solution needs to be implemented, which could model gobo pattern
light reflections from 3D model surfaces, for an amount of at least 20 projectors, in
"DMX Director" - Architecture of a 3D light-programming application, in a multi-user Internet environment
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