V8/usr/lib/view2d/howto
OPTIONS NOT DOCUMENTED ON THE MAN PAGE
view2d -Tc:
-B use blue background
-SF download one frame at a time (hence, arbitrarily long movies)
GO? s snaps camera
GO? 4 skips 4 frames forward; default=1
-SMn like -SF, but "snap n" after each frame
-SA "autopilot" like -SF, but keeps going
-b don't show blank frame
-mf file color map is taken from file, which has n lines (where n is
the number of colors, specified by -cn). Each line has three integers
from 0 to 255 for red, green, and blue.
For a sample program, see /n/bowell/src/cmd/view2d/makemap.c.
-mg use grey rather than color
-mr use red to blue, omitting green
-v verbose
-vc print colors
-w warmstart
-D debugging (don't write on /dev/cv0)
view2d -Tp:
-clx,x,x,x sets contour levels at x, x, x, and x. up to 8 levels allowed.
view2d -Th produces a halftone image on the 202
regrid -nNX,NY ... | view2d -Th | panther /usr/ehg/bin/half NX NY
Panther half takes NX=NY=300 by default.
The default number of levels is 10, but can be changed by view2d -cN.
/n/bowell/src/cmd/view2d/rksmith/rkstri.c
reads triangle formats and converts to grids
antial -c20 | level -ma produces antialiased movies
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. commands .
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flood r g b fill screen. 0 <= r,g,b <= 255
snap n take n exposures of what is currently on the display (default n=1)
xhair interactive pan and zoom. Type ? for help.
view2d, regrid, vdata {see man pages}
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. titles .
..........
view2d -vc ... 2>movie.color
title movie.color movie.text >t
flood; dcv -r t
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. making slides .
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mount the Contax 35mm camera on the Dunn using two bolts, hand tight
plug in the cord from the Contax to the Dunn
wiggle stretch cord where it plugs into Contax; this is flaky!
set switch G to 1 on the logic board inside the Dunn on the right side
(unlock the panel by giving a quarter-turn to a screw, reaching
through from the left hand side of the Dunn.)
POWER on the Dunn
RESET
reset exposure counter
set aperture to f/5.6 for Ektachrome ASA 100 film
FOCUS mode
EXPOSE hit again when it times out
display typical image
adjust camera lens focus
slide eyepiece into viewing position if necessary
if necessary, adjust VERT and HORIZ POS knobs inside the Dunn cabinet
There is a lock tab on the side of the knob.
NORMAL mode
RESET
RESET
EXPOSE
slide eyepiece out of the way
open camera back by pulling on rewind lever
load film an inch onto sprocket and takeup spool
see the refrigerator or Theo's "Princeton" drawer
close back
film advance indicator should be at S
set motor drive to C
advance film until indicator is 1
set shutter speed to B at rewind knob
view2d -Sf ...
answer s for those frames you want slides of
answer 6 to skip forward six frames
12-exp Polaroid cassette allows 13 or 14 exposures
momentarily press R level on drive
rewind manually
Photo Express Ltd at the Short Hills Mall (near Altmans)
will develop Ektachrome in one hour, for $8.95/36exp
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. making movies .
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Prepare an outline and makefile as in /n/swift/usr/ehg/cur/view2d/sample.make.
Movies are projected at 24 frames/second; there are 40 frames/foot-of-film;
a standard film roll is 100 feet.
regrid your data files to the desired number of frames
Making a movie ties up the display for a long time; check with
ehg to make sure you're not getting in somebody's way.
We currently use 7247 or 7291 film. (The two emulsions are similar, and
can be processed together.) Often there will be film already in
the Bolex animation camera.
Mount bracket using the same two bolts from the Contax camera bracket.
(Never remove the brackets from the cameras!)
The necessary 3/16" allen wrench is in the plastic Bolex bag; if it
is gone, check Joe's drawer in the network lab.
The high part of the bracket should be towards the rear of the Dunn.
Plug in the cord from the Bolex to the Dunn.
Set switch G on the logic board inside the panel on the right side.
POWER
set f/4; adjust baffle
In dim light (since the film spool is not sealed!), open Bolex case.
Focus using prism held in focal plane
hit expose button, switch on motor, and focus (about .32 ft)
as necessary, turn off motor, then repeat.
verify that film advance and shutter are working correctly
(to reset phase of shutter, use needle-nose pliars on drive shaft)
An eye loupe is in the plastic camera bag.
Stash prism and loupe; reinstall pressure plate. Do not lose these small parts!
To thread film:
Be sure that the film winds off the spool as indicated by the arrows.
"squeeze things together" says Lynn
turn on motor to verify that film is advancing properly
replace cover
set two buttons to "normal", hit reset
advance 5 feet using switch on motor drive
(film footage indicator moves from "ft" to "0")
may have to hit RESET occasionally as camera self-triggers
hit reset
nohup make&
cut film and send to TVC Labs
TVC Labs
311 W. 43rd St
New York NY 10036
800-225-6566
The running purchase order number is 164-802. Send the invoice to Chris.
Enclose a letter with the negative asking "develop using normal processing and
make a dailies print; return by first class mail the negative, print, spool,
and can to ..." Your home address is probably faster than the Labs mailroom.
When the print returns, use a split reel and moviola in Lillian's office
to transfer to a normal reel. 16mm projectors are available from CIB x2122.
artistic suggestions from Lillian:
snap 2 is ok; snap 3 gives noticeable jerkiness
fade up title in about 8 to 16 frames
leave 85 frames for the first line of text, less for extra lines
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4x5 Polacolor
set f/4
load on L
pull for processing on P
wait 2 min for developing
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* frame buffer * swift /dev/cv0
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hardware
Raster Technologies Model One/20 controller
512 * 512 * 3 * 8-bit image planes
3 * 256 * 8 color lookup tables
RS170 RGB output
DMA interface
Hitachi monitor
Dunn camera
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coordinate system:
lower left of screen = (0,0), upper right = (511,511)
cvinit(1); at start of each program. 0 for warm start.
cvflush(); flush i/o buffer.
image(data,x0,y0,x1,y1,bank) write 8-bit image
data char[x1-x0+1][y1-y0+1]
stored as if a Fortran array with d(i,j) at x=i, y=j,
(scan rows left to right, starting with bottom row)
maximum image size is 128^2.
x0,y0,x1,y1 coordinates of lower left and upper right of window
bank 3-bit value (red,green,blue) indicating banks to be written
lutrte(bank) set which bank drives the display
bank 0x0 each bank indexes its own color table
0x7E red drives all
0x75 green drives all
0x53 blue drives all
cvmap(map,maxi,zero)
char *map; /* string describing kind of map */
int maxi; /* indices from 0 through maxi */
int zero; /* currently unused */
map=ffile read triples from file
r blue-to-red (for 8 bit in; gamma corrected)
s spectrum (for 8 bit in; gamma corrected)
n normal map (for 24 bin in; not gamma corrected)
g normal map (for 24 bin in; gamma corrected)
cvload(n,x,y); load coordinate register n. 0<=n<=63
creg 4 coordinates of center of screen (useful for panning)
zoom(fact)
fact = 1, 2, 4, or 8 (to see 512, 256, 128, or 64 -size images)
cvvalue(r,g,b) set current color
cvflood() erase screen