LifeViewer

LifeViewer
Homepage	Click here
Purpose	Life simulation
Created by	Chris Rowett
Platform	HTML5 / Javascript

LifeViewer is a scriptable pattern viewer and editor used to simulate Life and a wide range of other 1D and 2D cellular automata.

If you want to use LifeViewer on your own site then the latest release can be downloaded here.

x=59, y = 7, rule = B3/S23 o5b5ob5ob5obo3bob5ob5obobobob5ob4o$o7bo3bo5bo5bo3bo3bo3bo5bobobobo5bo 3bo$o7bo3bo5bo5bo3bo3bo3bo5bobobobo5bo3bo$o7bo3b3o3b3o3bo3bo3bo3b3o3bo bobob3o3b4o$o7bo3bo5bo5bo3bo3bo3bo5bobobobo5bo3bo$o7bo3bo5bo6bobo4bo3b o5bobobobo5bo3bo$5ob5obo5b5o3bo3b5ob5o2bobo2b5obo3bo! #C [[ COLOUR DEAD 0 0 0 COLOUR ALIVE 0 0 0 ]] #C [[ LOOP 1101 STARS NOSTEPBACK ]] #C [[ AUTOSTART X -90 Y 60 LAYERS 6 ZOOM 4 DEPTH 3 ]] #C [[ PAUSE 3 X 90 Y -60 ANGLE 20 THEME 0 ]] #C [[ PAUSE 1.5 X 90 Y 60 ANGLE 340 ZOOM 6 ]] #C [[ PAUSE 1.5 X 0 Y 0 ANGLE 0 THEME 3 ZOOM 4 ]] #C [[ PAUSE 1 X 0 DEPTH 0.2 ZOOM 6 THEME 4 ]] #C [[ T 1 THEME 7 ]] #C [[ T 400 ZOOM 5 X 5 Y -10 THEME 2 ]] #C [[ T 450 DEPTH 5 ]] #C [[ T 560 X -155 Y 127 DEPTH 0.5 ]] #C [[ T 950 X -242 Y 214 ANGLE 20 ]] #C [[ T 1050 DEPTH 0 ANGLE 0 AUTOFIT "#T" ]] #C [[ T 1100 X 0 Y 0 ZOOM 0.25 THEME CUSTOM ]]

Rule support:

• 2-state Margolus rules.

x=63, y = 34, rule = critters 9$52bo9$48b2o$39bo$47bo2bo3$47bo$48bo$5bo31bo20bo$6bo31bo18bo$6bo31bo 17bo$5bo31bo17bo! [[ RLE input o$bo$bo$o! PASTET EVERY 64 PASTE input 5 24 ZOOM 4 ]]

• 2-state Outer-totalistic Life-like cellular automata (from ranges 1 to 500, including Larger than Life).

x=113, y = 113, rule = R7,C2,M1,S65..114,B65..95,NM 49b4o$47b7o$46b10o$45b12o$45b13o19b2o$44b3o5b6o17b6o$22b3o19b3o5b6o16b 9o$20b7o17b3o5b6o15b11o$19b9o16b3o5b6o14b3ob9o$18b12o15b3o2b8o14b3o4b 7o$18b13o14b12o14b3o6b6o$17b5o3b6o15b10o15b3o6b6o$17b2o7b5o16b7o17b3o 6b6o$17b2o7b5o18b3o20b3obo2b7o$17b3o5b6o41b13o$17b3o2b9o42b11o$18b3ob 8o44b8o$19b10o46b6o16b5o$20b7o50b2o17b8o$21b5o69b4o2b4o$94b3o4b5o$93b 3o5b5o$93b5o4b5o$93b5o4b5o$93b5o4b5o$93b6o2b5o$94b12o$9b5o81b10o$8b7o 80b9o$7b9o80b8o$6b10o81b6o$6b11o$5b13o$5b5o3b5o$4b5o5b5o$4b5o5b5o$5b4o 4b5o$5b3o6b4o$6b4o3b4o$7b9o$8b7o$10b3o3$104b4o$102b8o$101b10o$100b4o4b 4o$100b3o5b4o$99b4o5b5o$99b5o4b5o$99b5o4b5o$100b13o$100b12o$101b10o$4b 6o91b10o$3b8o91b8o$2b10o91b6o$2b10o$b12o$13o$5o4b5o$5o4b5o$5o5b4o$b4o 5b3o$b4o4b4o$2b10o$3b8o$5b4o3$100b3o$98b7o$97b9o$96b4o3b4o$95b4o6b3o$ 95b5o4b4o$94b5o5b5o$94b5o5b5o$95b5o3b5o$95b13o$96b11o$10b6o81b10o$9b8o 80b9o$9b9o80b7o$8b10o81b5o$7b12o$7b5o2b6o$6b5o4b5o$6b5o4b5o$6b5o4b5o$ 7b5o5b3o$7b5o4b3o$8b4o2b4o69b5o$9b8o17b2o50b7o$11b5o16b6o46b10o$31b8o 44b8ob3o$29b11o42b9o2b3o$28b13o41b6o5b3o$27b7o2bob3o20b3o18b5o7b2o$27b 6o6b3o17b7o16b5o7b2o$27b6o6b3o15b10o15b6o3b5o$27b6o6b3o14b12o14b13o$27b 7o4b3o14b8o2b3o15b12o$28b9ob3o14b6o5b3o16b9o$29b11o15b6o5b3o17b7o$30b 9o16b6o5b3o19b3o$32b6o17b6o5b3o$34b2o19b13o$56b12o$57b10o$59b7o$60b4o!

• 2-state Isotropic non-totalistic Life-like cellular automata (for range-1 Moore and range-1 hexagonal).
• 2-state Non-isotropic Life-like cellular automata (for range-1 Moore, hexagonal and von Neumann).
• Generations rules (as an extension of the outer-totalistic, non-totalistic and non-isotropic rulespaces).

x=200, y = 100, rule = 2/13/21:T200,100 #C Fireworks #C An admirably beautiful rule by John Elliott 88.A6$A58$61.A24$107.A11$37.A! [[ ZOOM 2 ]]

• Alternating rules.
• Partitioned cellular automata (PCA) rules.

x=49, y = 29, rule = PCA_4 AB45.AB$HD45.HD24$21.A20.D$20.E$AB19.B20.F4.AB$HD39.D5.HD! [[ STEP 20 ZOOM 6 ]]

• Weighted rules.
• Elementary cellular automata (even numbers only).
• [R]History rules.
• RuleTable rules from a repository.

Grid and neighbourhood support:

• square grid:
  • outer-totalistic:
    • Moore
    • von Neumann
    • circular
    • cross
    • L2
    • saltire
    • star
    • checkerboard
    • hash
    • custom (CoordCA)
  • non-totalistic
  • non-isotropic
  • Margolus
  • PCA
• hexagonal or offset-square grid:

x=50, y = 136, rule = B2/S34H $24bo$22bo$24bo$22b3o$25bo$23b3o$25bobo$25bobo$24b2o$22bo5bo$23bo$27b 2o$27bo$23bo$25b2obo$23bo2bobo$25bob3o$21bo2bob3o$22b3o3b2o$21bo2bob2o $26bobo$23b2o2bo$24b2o3bo$25b2obo$27bo! [[ TRACK -0.25 0.5 GPS 15 GRID ZOOM 8 ]]

• • outer totalistic:
    • hexagonal
    • tripod
    • asterisk
    • custom (CoordCA)
  • non-totalistic
  • non-isotropic
• triangular grid:

x=8, y = 6, rule = B456/S34L bo3bo$bo4bo$b2o4bo$2bo5bo$2bo5bo$3b2ob2o! [[ TRACK 1/6 1/6 GPS 8 GRID ZOOM 16 ]]

• • outer totalistic:
    • triangular Moore
    • triangular edges
    • triangular vertices
    • triangular inner
    • triangular outer
    • custom (CoordCA)

Bounded grid types:

• Plane
• Cylinder (with optional shift)
• Torus (with optional shift)
• Klein-bottle (with optional shift)
• Cross-surface
• Sphere

For range 2+ neighbourhoods only Plane, and Torus (without shift) are supported.

Native support for BSFKL, Extended Generations and deficient rules is also planned. Support for 1D totalistic rules may also be planned.

LifeViewer features:

• Smooth non-integer zoom with anti-aliasing and rotation.
• Colour themes with cell history and longevity.
• Pseudo 3D layers and stars.
• Multiple ways to automatically track patterns with the camera as they evolve.
• Script language that allows many features to be customized including Waypoint animations.
• Support for multiple embedded LifeViewers and/or a single popup LifeViewer.
• Ability to step back to earlier generations for all patterns and reverse playback for reversible Margolus and PCA patterns.
• Random pattern and rule generation.
• Pattern annotation with Labels, Arrows, Lines and Polygons.
• Programatically pasting cells onto the grid at defined intervals (for example: glider injection).
• Identification of oscillator and spaceship periods.
• Automatic scaling for high DPI displays including smartphones and tablets.
• Editor with unlimitied undo/redo and multiple clipboards.

The keyboard shortcuts are shown below:

External links

• Release notes
• LifeViewer homepage
• LifeViewer files

• LifeViewer at the Life Lexicon

Forum threads

• LifeViewer - Life simulator in HTML5 (discussion thread) at the ConwayLife.com forums

• Pattern viewer for forum threads (discussion thread) at the ConwayLife.com forums