asymptote: Search paths
2.5 Search paths
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In looking for 'Asymptote' system files, 'asy' will search the following
paths, in the order listed:
1. The current directory;
2. A list of one or more directories specified by the configuration
variable 'dir' or environment variable 'ASYMPTOTE_DIR' (separated
by ':' under UNIX and ';' under 'MSDOS');
3. The directory specified by the environment variable
'ASYMPTOTE_HOME'; if this variable is not set, the directory '.asy'
in the user's home directory ('%USERPROFILE%\.asy' under 'MSDOS')
is used;
4. The 'Asymptote' system directory (by default,
'/usr/local/share/asymptote' under 'UNIX' and 'C:\Program
Files\Asymptote' under 'MSDOS').