# Last edited on 2008-06-20 17:12:22 by stolfi

GOAL

  Produce a set of images that when displayed full-screen can be used
  as light source for photo stereo.
  
    ppmmake -maxval=255 rgbi:1/1/1 40 30 > white.ppm
    ppmmake -maxval=255 rgbi:0/0/0 40 30 > black.ppm
    
    display black.ppm white.ppm &
    
  Assembling the "screen lamps":
    
    pnmcat -lr  black.ppm black.ppm black.ppm > 000.ppm
    
    pnmcat -lr  black.ppm black.ppm white.ppm > 001.ppm
    pnmcat -lr  black.ppm white.ppm black.ppm > 010.ppm
    pnmcat -lr  white.ppm black.ppm black.ppm > 100.ppm
    
    pnmcat -tb 100.ppm 000.ppm 000.ppm > 100-000-000.ppm
    pnmcat -tb 010.ppm 000.ppm 000.ppm > 010-000-000.ppm
    pnmcat -tb 001.ppm 000.ppm 000.ppm > 001-000-000.ppm
    
    pnmcat -tb 000.ppm 100.ppm 000.ppm > 000-100-000.ppm
    pnmcat -tb 000.ppm 010.ppm 000.ppm > 000-010-000.ppm
    pnmcat -tb 000.ppm 001.ppm 000.ppm > 000-001-000.ppm
    
    pnmcat -tb 000.ppm 000.ppm 100.ppm > 000-000-100.ppm
    pnmcat -tb 000.ppm 000.ppm 010.ppm > 000-000-010.ppm
    pnmcat -tb 000.ppm 000.ppm 001.ppm > 000-000-001.ppm
    
    display *-*-*.ppm &
    
  Using the pictures (screen width = 1600 pixels):
    
    display -delay 2 -filter Box -resize '1300%' *-*-*.ppm &