| 1 |
greg |
2.1 |
#!/bin/csh -f |
| 2 |
|
|
# RCSid: $Id$ |
| 3 |
|
|
# |
| 4 |
|
|
# Put right trianglar markers down a path at the given intervals. |
| 5 |
|
|
# Use with replmarks to place regular-sized objects along a path. |
| 6 |
|
|
# Shorter (y-side) of triangles is always horizontal (perp. to z). |
| 7 |
|
|
# |
| 8 |
|
|
# Input is an ordered list of 3-D points defining the path. |
| 9 |
|
|
# We interpolate the path and align our markers with it. |
| 10 |
|
|
# Triangles are sized and aligned so tip of one meets butt of next |
| 11 |
|
|
# |
| 12 |
|
|
if ($#argv < 2) then |
| 13 |
|
|
echo "Usage: $0 3d.pts spacing [markmat]" |
| 14 |
|
|
exit 1 |
| 15 |
|
|
endif |
| 16 |
|
|
set pts=$1 |
| 17 |
|
|
set step=$2 |
| 18 |
|
|
set mat=mark |
| 19 |
|
|
if ($#argv > 2) set mat=$3 |
| 20 |
|
|
set npts=`wc -l < $pts` |
| 21 |
|
|
(head -1 $pts ; cat $pts) | lam - $pts \ |
| 22 |
|
|
| rcalc -e '$1=d($1,$2,$3,$4,$5,$6)' -e "cond=$npts+.5-recno" \ |
| 23 |
|
|
-e 's(x):x*x;d(x0,y0,z0,x1,y1,z1):sqrt(s(x1-x0)+s(y1-y0)+s(z1-z0))' \ |
| 24 |
|
|
| total -1 -r > /tmp/run$$.dat |
| 25 |
|
|
lam /tmp/run$$.dat $pts | tabfunc -i xp yp zp > /tmp/path$$.cal |
| 26 |
|
|
set tmax=`tail -1 /tmp/run$$.dat` |
| 27 |
|
|
set nsteps=`ev "floor($tmax/$step)"` |
| 28 |
|
|
echo $mat > /tmp/tri$$.fmt |
| 29 |
|
|
cat >> /tmp/tri$$.fmt << '_EOF_' |
| 30 |
|
|
polygon marker.${recno} |
| 31 |
|
|
0 |
| 32 |
|
|
0 |
| 33 |
|
|
9 |
| 34 |
|
|
${ x0 } ${ y0 } ${ z0 } |
| 35 |
|
|
${ x1 } ${ y1 } ${ z1 } |
| 36 |
|
|
${ x2 } ${ y2 } ${ z2 } |
| 37 |
|
|
|
| 38 |
|
|
'_EOF_' |
| 39 |
|
|
cnt $nsteps | rcalc -o /tmp/tri$$.fmt -f /tmp/path$$.cal -e st=$step \ |
| 40 |
|
|
-e 't=$1*st;x0=xp(t);y0=yp(t);z0=zp(t)' \ |
| 41 |
|
|
-e 'x1=xp(t+st);y1=yp(t+st);z1=zp(t+st)' \ |
| 42 |
|
|
-e 'x2=x0+.5*(y0-y1);y2=y0+.5*(x1-x0);z2=z0' |
| 43 |
|
|
rm /tmp/run$$.dat /tmp/path$$.cal /tmp/tri$$.fmt |
