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manpage: -Ovector-components

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Wolfgang Bumiller 2012-12-29 15:10:04 +01:00
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@ -490,6 +490,15 @@ instruction is added for several reasons. (For example the qcvm's
disassemble switch uses it to know when the function ends.). This
optimization replaces that last RETURN with DONE rather than adding
the DONE additionally.
.TP
.B -Ovector-components
Because traditional QC code doesn't allow you to access individual
vector components of a computed vector without storing it in a local
first, sometimes people multiply it by a constant like '0 1 0' to get,
in this case, the y component of a vector. This optimization will turn
such a multiplication into a direct component access. If the factor is
anything other than 1, a float-multiplication will be added, which is
still faster than a vector multiplication.
.SH CONFIG
The configuration file is similar to regular .ini files. Comments
start with hashtags or semicolons, sections are written in square