Scripts/prismatic-rain.ps1
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$esc = [char]27 $reset = "$esc[0m" $rows = 26 $cols = 70 $timeShift = Get-Random -Minimum 0.0 -Maximum ([math]::PI * 2) Write-Host for ($y = 0; $y -lt $rows; $y++) { $sb = [System.Text.StringBuilder]::new() for ($x = 0; $x -lt $cols; $x++) { $t = $x / [double]($cols - 1) $phase = $timeShift + $t * [math]::PI * 2 $rain = [math]::Sin($phase + $y * 0.6) $speed = [math]::Sin($phase * 1.5 + $y * 0.3) $h = ($t + $rain * 0.05) % 1 if ($h -lt 0) { $h += 1 } $s = 0.65 + 0.25 * $rain $l = 0.35 + 0.4 * (1 - $y / [double]$rows) $r = [int][math]::Round(255 * (1 - $s * [math]::Max(0, [math]::Min(1, ([math]::Abs($h * 6 - 3) - 1))))) $g = [int][math]::Round(255 * (1 - $s * [math]::Max(0, [math]::Min(1, ([math]::Abs($h * 6 - 1) - 1))))) $b = [int][math]::Round(255 * (1 - $s * [math]::Max(0, [math]::Min(1, ([math]::Abs($h * 6 - 5) - 1))))) $r = [int][math]::Round($r * $l) $g = [int][math]::Round($g * $l) $b = [int][math]::Round($b * $l) $rainPhase = ($rain + $speed) / 2 $char = if ($rainPhase -gt 0.45) { '│' } elseif ($rainPhase -gt 0.2) { '╎' } elseif ($rainPhase -gt -0.1) { '╵' } else { '·' } $null = $sb.Append("$esc[38;2;$r;$g;$b" + "m$char") } $null = $sb.Append($reset) Write-Host $sb.ToString() } $label = "$esc[38;2;180;220;255mPRISMATIC$esc[0m $esc[38;2;255;190;220mRAIN$esc[0m" $padLeft = [math]::Max(0, [int](($cols - ([regex]::Replace($label, "$([char]27)\[[0-9;]*m", '')).Length) / 2)) Write-Host ((' ' * $padLeft) + $label) Write-Host $reset |