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Command line switches consist of a + (plus) or
- (minus) sign, followed by one or more alphabetic characters and
possibly a numeric value. Here is a typical command line with switches.
POVRAY +Isimple.pov +V +W80 +H60
povray is the name of the program and it is followed by
several switches. Each switch begins with a plus or minus sign. The
+I switch with the filename tells POV-Ray what scene file it should
use as input and +V tells the program to output its status to
the text screen as it's working. The +W and +H
switches set the width and height of the image in pixels. This image will be
80 pixels wide by 60 pixels high.
In switches which toggle a feature, the plus turns it on and minus turns it
off. For example +P turns on the pause for keypress when
finished option while -P turns it off. Other switches are
used to specify values and do not toggle a feature. Either plus or minus may
be used in that instance. For example +W320 sets the width to
320 pixels. You could also use -W320 and get the same
results.
Switches may be specified in upper or lower case. They are read left to
right but in general may be specified in any order. If you specify a switch
more than once, the previous value is generally overwritten with the last
specification. The only exception is the +L switch for setting
library paths. Up to ten unique paths may be specified.
Almost all + or - switches have an equivalent
option which can be used in an INI file which is described in the next
section. A detailed description of each switch is given in the option
reference section.
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