Extension/Life.rd.ext.ps1
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<# .Synopsis Generates life .Description Uses the ffmpeg filter for life .Link https://ffmpeg.org/ffmpeg-filters.html#life #> # It's an extension [Runtime.CompilerServices.Extension()] # that extends New-Media [Management.Automation.Cmdlet("New","Media")] param( # If set, will generate life [Parameter(Mandatory)] [switch] $Life, # Set the file from which to read the initial grid state. # In the file, each non-whitespace character is considered an alive cell, and newline is used to delimit the end of each row. # If this option is not specified, the initial grid is generated randomly. [string] $LifeStateFile, # Set the random fill ratio for the initial random grid. # It is a floating point number value ranging from 0 to 1, defaults to 1/PHI. # It is ignored when a file is specified. [ValidateRange(0,1)] [double] $LifeFillRatio, # Set the seed for filling the initial random grid, must be an integer included between 0 and UINT32_MAX. # If not specified, or if explicitly set to -1, the filter will try to use a good random seed on a best effort basis. [int] $LifeSeed, # Set the life rule. # # A rule can be specified with a code of the kind "SNS/BNB", # where NS and NB are sequences of numbers in the range 0-8, # NS specifies the number of alive neighbor cells which make a live cell stay alive, # and NB the number of alive neighbor cells which make a dead cell to become alive (i.e. to "born"). "s" and "b" can be used in place of "S" and "B", respectively. # # Alternatively a rule can be specified by an 18-bits integer. # The 9 high order bits are used to encode the next cell state if it is alive for each number of neighbor alive cells, # the low order bits specify the rule for "borning" new cells. # Higher order bits encode for an higher number of neighbor cells. # For example the number 6153 = (12<<9)+9 specifies a stay alive rule of 12 and a born rule of 9, which corresponds to "S23/B03". # Default value is "S23/B3", which is the original Conway’s game of life rule, # and will keep a cell alive if it has 2 or 3 neighbor alive cells, # and will born a new cell if there are three alive cells around a dead cell. [string] $LifeRule, # If not set, will not stitch the left/right top/bottom grid edges together. [switch] $DoNotStitchLifeGrid, #$ Set cell mold speed. # If set, a dead cell will go from death_color to mold_color with a step of mold. mold can have a value from 0 to 255 [byte] $LifeMoldSpeed, # Set the color of living (or new born) cells. [string] $LifeLivingColor, # Set the color of dead cells. # If mold is set, this is the first color used to represent a dead cell. [string] $LifeDeathColor, # Set mold color, for definitely dead and moldy cells. [string] $LifeMoldColor ) $lifeFilterParameters =@( if ($LifeStateFile) { $resolvedLifeStateFile = $ExecutionContext.SessionState.Path.GetResolvedPSPathFromPSPath($LifeStateFile) if ($resolvedLifeStateFile) { "f=$($resolvedLifeStateFile)" } } if ($LifeFillRatio) { "random_fill_ratio=$LifeFillRatio" } if ($LifeSeed) { "seed=$LifeSeed" } if ($LifeRule) { "rule=$LifeRule" } if ($DoNotStitchLifeGrid) { "stich=0" } if ($LifeMoldSpeed) { "mold=$LifeMoldSpeed" } if ($LifeLivingColor) { "life_color=$LifeLivingColor" } if ($LifeDeathColor) { "death_color=$LifeDeathColor" } if ($LifeMoldColor) { "mold_color=$LifeMoldColor" } if ($Resolution) { "s=$Resolution" } ) -join ':' '-f' 'lavfi' '-i' "life=$lifeFilterParameters" -replace '\=$' |