ProcGalaxy

Procedural Colorful Galaxies

Double click the jar to get a random galaxy shown. (Window closes automatically after 20 seconds).

To save images or control the generation process, you will have to get down to the command line.

java -jar prettygalaxy.v1.jar [options...]
 -imageSize N      : Output image size. Images are always square. Default is
                     800x800.
 -out dir/prefix   : Output file. Finds the first unused file dir/prefixN and
                     writes to it. Can write -numRuns number of files
                     incrementally numbered. Directory must be provided and
                     must already exist.
                      If absent, shows one image and exits.
 -numRuns N        : Produce how many images. Without an -out option, shows 1
                     image and quits.
 -numStarsInThou N : Number of stars in thousands.Default 20k.
 -numArms N        : Number of arms of the galaxy. Default random between 2-6.
 -maxArms N        : Maximum number of randomly chosen arms. Minimum is always
                     2. If -numArms is specified, that value is always used.
                     Default 6.
 -swirl N          : Angular spread, in multiples of Pi. Default random  -3.0 to
                     -1.0 or +1.0 to +3.0.
 -armsWeight N     : Low values keep stars close to disk, high values push them
                     out to the arms. Default .1 to .4.
 -armsThickness N  : Low values make thinner arms, high values make thicker
                     arms and bigger central disk. Default values .05 to .15.
 -avgStarRad N     : Average star radius in pixels. Default 2.5. Star radius is
                     chosen on a gaussian distribution.
 -maxStarRad N     : Maximum star radius in pixels allowed. Default 10.
 -hueStart N       : Color of the center of the galaxy. Range 0.0 to 1.0.
 -hueChangeLong N  : Rate of color change center towards arms. Default random
                     -2.0 to 2.0
 -hueChangeTrans N : Rate of color change from center of arms towards sides.
                     Default -0.2 + +0.2 Default random -1.0 to 1.0

Example: java -jar prettygalaxy.v1.jar -numStarsInThou 40 -numRuns 1 -out out/lgim -armsThickness .5 -imageSize 1500

The program first creates stars in a bar or a star shape. Then a swirl is put on it (rotate the star around the galactic center proportional to how far it is from there.)

This is how it looks before the swirl:

#procplanets

Download ProcPlanets here!

Procedural planets. Currently three types are implemented.

Habitable planets with landmasses, water oceans and cloud cover.
Gas (Storm) planets.
Cracked (lava) planets with glowing magma visible even on the dark side.

java -jar PlanetGfx.v1.jar [options...]
 -imageSize N    : Output image size. Images are always square. Default is
                   800x800.
 -out dir/prefix : Output file. Finds the first unused file dir/prefixN and
                   writes to it. Can write -numRuns number of files
                   incrementally numbered. Directory must be provided and must
                   already exist.
                    If absent, shows one image and exits.
 -numRuns N      : Produce how many images. Without an -out option, shows 1
                   image and quits.
 -types VAL      : What types of planet. Comma separated list of types. valid
                   values are lava, habitable and storm.
                   Example: --types lava,habitable
 -layout VAL     : single, grid or line. Single just creates one planet, grid
                   creates a 5x5 grid of randomly picked planets. Line creates
                   planets in a line for showcasing.
 -clearback      : Transparent background, so it is easy to compose into other
                   images

Example: java -jar PlanetGfx.v1.jar -numRuns 1 -types habitable,storm -out out/lgim -layout single

dattasid/ProcGalaxy

ProcGalaxy