Various implementations exist for yapp, some of which are listed below. During installation one of them has been selected as your default implemention, with which all yapp-based graphics programs (a few programs, e.g. xyzview(1NEMO) ) use other graphics device drivers). Currently (2001) most used at the PGPLOT and PS implementations.
Hopefully one of them is close enough (or exactly) for
what you want. Note that most of them need to be linked (notable exceptions
yapp_null, yapp_ps, yapp_meta) with site dependant external libraries. For
this, the environment variable YAPPLIB needs to be defined. Most common
graphics program can then be compiled as follows:
cc -o prog prog.c $NEMOLIB/libnemo.a $YAPPLIB -lmnormally set through the $NEMO/NEMORC.local file (see nemorc(8NEMO) ) There are some example $YAPP_XXX environment variables defined in the $NEMO/NEMORC file.
Some yapp implementations allow you to select from various devices. As we do not advertise interactive programs very much, the keyword ’yapp=’ or an environment variable YAPP will be used to select a device and it’s possible options.
Treatment of colors, in particular what the background and foreground color is, is not uniform.
PGPLOT_BACKGROUND n/a 0 is the background color ("black" for /xs) PGPLOT_FOREGROUND n/a 1 is the foreground color ("white" for /xs) PGPLOT_GIF_WIDTH 850 pixels for /gif (interchange for /vgif) PGPLOT_GIF_HEIGHT 680 pixels for /gif (i.e. 85 dpi) PGPLOT_PPM_WIDTH 850 pixels for /ppm (interchange for /vppm) PGPLOT_PPM_HEIGHT 680 pixels for /ppm (i.e. 85 dpi) PGPLOT_PS_MARKERS n/a use "NO" if no postscript font for markers to be used PGPLOT_PS_COLOR n/a color mode PGPLOT_PS_WIDTH 7800 width in milli-inches (these are for 8.5x11 inches) PGPLOT_PS_HEIGHT 10500 height in milli-inches PGPLOT_PS_HOFFSET 350 horizontal offset from bottom left PGPLOT_PS_VOFFSET 250 vertical offset from bottom left PGPLOT_PS_EOF n/a EOF marker, useful for apple laserwriters (^D) PGPLOT_PS_BBOX n/a if set to "MAX", max bounding box written, else PGPLOT_IDENT n/a if set, user name, date and time written in bottom right corner PGPLOT_PS_DRAW_BBOXFor X windows drivers (e.g. /xs and /xw) a number of X resources are used (see xrd(1) ), e.g.
pgxwin.Win.geometry: WIDTHxHEIGHT+X+Y pgxwin.Win.iconGeometry: +X+Y
NEMO/src/kernel/yapp various yapp_* implementations
16-aug-88 document written - some are premature! PJT 16-nov-88 yapp_suntools added PJT 26-oct-90 updated outdated documentation PJT 11-nov-94 added yapp_meta PJT 28-mar-04 added some useful PGPLOT info PJT
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