ANN: Tutorial on how to use the C preprocessor with CFDG
Posted: Mon Jan 12, 2009 4:22 pm
Macros and variables would come in handy when writing CFDG scripts. As they are not currently supported by the CFDG software, one has to use some workaround. One possible workaround is to use the C preprocessor. It turns out it works perfectly with CFDG. I've written a small shell script and a small tutorial for automating this. They are available from my website.
With the shell script, using cfdgpp instead of cfdg to compile your CFDG scripts will automatically preprocess them with the C preprocessor. You can thus write:
and it will render like
All features of the C preprocessor can thus be used within your CFDG scripts.
Any bug reports/comments/ideas for improvements are greatly appreciated as always. Enjoy!
With the shell script, using cfdgpp instead of cfdg to compile your CFDG scripts will automatically preprocess them with the C preprocessor. You can thus write:
Code: Select all
startshape sun
#define SUN(A) rule sun { A * { r (360/A) } ray { h 0 b 1 sat 1 |h 60 } }
SUN(5)
SUN(6)
SUN(7)
SUN(8)
SUN(9)
SUN(10)
rule ray {
CIRCLE { }
ray { y .1 r 1 s .965 h .05| }
}
rule ray 0.15 {
ray { flip 90 }
}Code: Select all
startshape sun
rule sun { 5 * { r (360/5) } ray { h 0 b 1 sat 1 |h 60 } }
rule sun { 6 * { r (360/6) } ray { h 0 b 1 sat 1 |h 60 } }
rule sun { 7 * { r (360/7) } ray { h 0 b 1 sat 1 |h 60 } }
rule sun { 8 * { r (360/8) } ray { h 0 b 1 sat 1 |h 60 } }
rule sun { 9 * { r (360/9) } ray { h 0 b 1 sat 1 |h 60 } }
rule sun { 10 * { r (360/10) } ray { h 0 b 1 sat 1 |h 60 } }
rule ray {
CIRCLE { }
ray { y .1 r 1 s .965 h .05| }
}
rule ray 0.15 {
ray { flip 90 }
}Any bug reports/comments/ideas for improvements are greatly appreciated as always. Enjoy!