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Diffstat (limited to 'sys/gio/calcomp/README')
| -rw-r--r-- | sys/gio/calcomp/README | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/sys/gio/calcomp/README b/sys/gio/calcomp/README new file mode 100644 index 00000000..c3dd017f --- /dev/null +++ b/sys/gio/calcomp/README @@ -0,0 +1,34 @@ +GIO Calcomp kernel + +This directory contains source for the IRAF calcomp graphics kernel. +Specifications may be found in ccpspecs.hlp. Installation involves +building the kernel task, which is accomplished using "make" (Makefile) +with argument "install" to move the executable into lib$. + +In addition to the kernel task routines, the vttest.x routine contains code +to simulate calcomp software on standard gio graphics devices. vttest.x +contains all the source for the simulation, using parameter file vttest.par. +Here, the calcomp routines "plot", "plots", "newpen", and "symbol" are +replaced with appropriate gio calls (violating interfaces) and to be used +mainly for testing text fonts, line type and width simulation. + +TODO: + +- super-bold font +- bold + italic + +- multiples of dash, dot for linetypes numbered higher than 4 + +-------------------------------------------------------------------------------- +FUTURE ENHANCEMENTS (much work): + +1) Sophisticated parallel-tracing algorithm that looks at entire array + and merges intersections so that all adjacent segments are parallel + to each other and do not cross the acute bisector. Implemented by + parallel array segments rather than drawing each parallel segment + individually, to avoid pen overtravel on short choppy lines. + +2) Panelling: when plot width exceeds available paper width, wrap graphics + to beyond maximum x so that paper can be cut and pasted. + +3) Versatec extension with area-fill. |