home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
OS/2 Professional
/
OS2PRO194.ISO
/
os2
/
graphic
/
qrt
/
addend11.doc
next >
Wrap
Text File
|
1989-03-26
|
2KB
|
67 lines
Addendum to QRT Version 1.1
The following are changes and additions to QRT which were
implemented after the manual was written.
Additions and Enhancements
Pattern Resizing
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.
Anywhere the keyword PATTERN appears within a primitive
definition, two other parameters can be attached:
xmult = p
ymult = p
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.
Bugs in Version 1.1
Transparent Objects
Object transparency does not work correctly in version
1.1. This bug is localized to a small section of code and
will be fixed in a future version. QRT still accepts the
TRANS parameter, but it should not be used.
QRT Ray Tracer Page 1 Addendum to 1.1