Format-Heatmap.ps1
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function Format-Heatmap { <# .SYNOPSIS Formats a value as a heatmap .DESCRIPTION Returns the color used to generate a heatmap for a given value. #> [Management.Automation.Cmdlet("Format", "Object")] [ValidateScript({return $true})] param( # The value that will be heatmapped. [Parameter(ValueFromPipeline)] $InputObject, # The Heatmap maximum, by default 1gb [Parameter(Mandatory)] $HeatMapMax = 1gb, # The Heatmap middle value, by default 512mb $HeatMapMiddle = 512mb, # The Heatmap minimum value, by default 0 $HeatMapMin = 0, # The color for cool. # To pass a Hex color as an int, simply replace # with 0x # (e.g. 0x00ff00 for green instead of '#00ff00') [int] $HeatMapCool =0x05dd00, # The color for hot. # To pass a Hex color as an int, simply replace # with 0x # (e.g. 0xff0000 for red instead of '#ff0000') [int] $HeatMapHot = 0xef1100 ) process { # Separate out the segments of the color, $coolRedPart = [byte](($HeatMapCool -band 0xff0000) -shr 16) # by bitmasking and then shifting right until it's bytes $coolGreenPart = [byte](($HeatMapCool -band 0x00ff00) -shr 8) $coolBluePart = [byte]($HeatMapCool -band 0x0000ff) $hotRedPart = [byte](($HeatMapHot -band 0xff0000) -shr 16) $hotGreenPart = [byte](($HeatMapHot -band 0x00ff00) -shr 8) $hotBluePart = [byte]($HeatMapHot -band 0x0000ff) "#{0:x2}{1:x2}{2:x2}" -f @( if ($InputObject -le $HeatMapMin) { $coolRedPart, $coolGreenPart, $coolBluePart } elseif ($InputObject -ge $HeatMapMax) { $hotRedPart, $hotGreenPart, $hotBluePart } else { if ($InputObject -le $HeatMapMiddle) { $d = 1 - ([double]$InputObject / ($HeatMapMiddle - $HeatMapMin)) [Byte][Math]::Min(255, $hotRedPart * $d + $coolRedPart) [Byte][Math]::Min(255, $hotGreenPart * $d + $coolGreenPart) [Byte][Math]::Min(255, $hotBluePart * $d + $coolBluePart) } else { $d = 1 - ([double]$InputObject / ($HeatMapMax - $HeatMapMiddle)) [Byte][Math]::Min(255, $coolRedPart * $d + $hotRedPart) [Byte][Math]::Min(255, $coolGreenPart * $d + $hotGreenPart) [Byte][Math]::Min(255, $coolBluePart * $d + $hotBluePart) } }) } } |