hydrostat(6)

hydrostat6

Wiggly squid or jellyfish with many tentacles.

Usage

hydrostat [--display host:display.screen] [--visual visual] [--window] [--root] [--window-id number] [--delay number] [--speed number] [--count number] [--head-radius number] [--tentacles number] [--thickness number] [--length number] [--gravity number] [--current number] [--friction number] [--no-pulse] [--wireframe] [--fps]

Overview

Wiggly squid or jellyfish with many tentacles. A muscular hydrostat is a biological structure used to move its host about, consisting of muscles with no skeletal support. It performs its hydraulic movement without fluid in a separate compartment, as in a hydrostatic skeleton.

Options

--visual visual

Specify which visual to use. Legal values are the name of a visual class, or the id number (decimal or hex) of a specific visual.

--window

Draw on a newly-created window. This is the default.

--root

Draw on the root window.

--window-id number

Draw on the specified window.

--delay number

Per-frame delay, in microseconds. Default: 20000 (0.02 seconds).

--speed number

Animation speed. 2.0 means twice as fast, 0.5 means half as fast.

--count number

Number of squid. 1 - 100. Default: 10.

--head-radius number

Head size. 10 - 100. Default: 60.

--tentacles number

Number of tentacles. 3 - 100. Default: 40.

--thickness number

Thickness of tentacles. 3 - 40. Default: 18.

--length number

Length of tentacles. 10 - 150. Default: 70.

--gravity number

Strength of gravity. 0 - 10.0. Default: 0.5.

--current number

Strength of current. 0.0 - 10.0. Default: 0.25.

--friction number

Coefficient of friction. 0.0 - 0.1. Default: 0.02.

--pulse | --no-pulse

Whether the squid should pulse. Default true.

--wireframe | --no-wireframe

Render in wireframe instead of solid.

--fps | --no-fps

Whether to show a frames-per-second display at the bottom of the screen.

Environment

DISPLAY

to get the default host and display number.

XENVIRONMENT

to get the name of a resource file that overrides the global resources stored in the RESOURCE_MANAGER property.

XSCREENSAVER_WINDOW

The window ID to use with --root.

Author

Justin Windle and Jamie Zawinski.

From xscreensaver 6.15-1 in Arch Linux 2026-11-01. Parsed by carta from the page's man source.