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root/radiance/ray/src/gen/markpath.csh
Revision: 2.1
Committed: Sat Feb 22 02:07:23 2003 UTC (21 years, 1 month ago) by greg
Content type: application/x-csh
Branch: MAIN
CVS Tags: rad3R5
Log Message:
Changes and check-in for 3.5 release
Includes new source files and modifications not recorded for many years
See ray/doc/notes/ReleaseNotes for notes between 3.1 and 3.5 release

File Contents

# Content
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