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- Addendum to QRT Version 1.1
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- The following are changes and additions to QRT which were
- implemented after the manual was written.
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- Additions and Enhancements
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- Pattern Resizing
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- Patterns can now be resized. If a pattern is defined with
- a size of 10 x 10, it can be made bigger or smaller on
- each object to which it is attached. This capability is
- not listed in the Language Reference Guide.
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- Anywhere the keyword PATTERN appears within a primitive
- definition, two other parameters can be attached:
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- xmult = p
- ymult = p
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- where p is a positive floating point number. This is a
- scale factor; for example, '2' would make the pattern
- twice as big, and '.25' would reduce it by a factor of
- 4. The x and y sizing parameters need not be the same.
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- Bugs in Version 1.1
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- Transparent Objects
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- Object transparency does not work correctly in version
- 1.1. This bug is localized to a small section of code and
- will be fixed before version 1.2. QRT still accepts the
- TRANS parameter, but it should not be used.
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- QRT Ray Tracer Page 1 Addendum to 1.1
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