Postscript output in Geocap is mainly created by using the psc command. They allow VTK data, graphics primitives, text, and axis to appear in Postscript format for later output to a hardcopy device.
Main Postscript features
- Conversion of all types of dataset and graphics, except gradient coloring
- Flexible viewport setting on device
- Axis. Parameters set by system (default) or by user
- Text, where the user may specify font, size, rotation and position
- Scaling to various formats
- Graphics primitives such as points, lines and rectangles
- Patterns
- Very compact Postscript file using a compression filter
While almost any kind of plotting feature can be created using the above features in combination with the Tcl programming language, most users will eventually expect a higher level interface; this task is currently being worked on.
The three steps goes like this
- Open a Postscript file
- Draw something, e.g. a map and some axes
- Close the postscript file
win 0 100 0 100 0 100 psc format a4 psc open c:/tmp/elephant.ps psc on psc vie 0.1 0.1 0.9 0.9 ;# 10% margin psc align center ;# Center dataset frame with resp. to viewport psc lwf 1 psc fontsize 0.3 cm psc axes nsew incrx 10 incry 10 # Then draw something, i.e. a map psc off psc close