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xgas(1X)
X11R6
NAME
  xgas - animated simulation of an ideal gas

SYNOPSIS
  xgas [-option...]

OPTIONS
  This is a toolkit program; all the usual toolkit options are available.

  -as Sets the autoStart resource.

  -ts Sets the timeStepSize resource.

  -d  Sets the delay resource.

  -rb Sets the randomBounce resource.

  -eq Sets the equilibrium resource.

  -mm Sets the maxMolecules resource.

  -fg Sets the foreground.

  -bg Sets the background.

DESCRIPTION
  xgas is a physical simulation of an ideal gas in a heated box. Gas
  molecules move around the box with velocities dependent on their
  temperature. A chamber consisting of two boxes contains the gas molecules;
  the temperature of each box can be independently controlled by a scrollbar.
  When gas molecules collide with the walls, their temperature approaches
  that of the box.

  Use mouse button 1 to create molecules one at a time at the cursor
  position.  Use mouse button 2 to create the maximum number of molecules at
  the cursor position.

RESOURCES
  The xgas program uses the following X resources:

  autoStart
      Starts the simulation automatically.  Good for canned demos.

  timeStepSize
      Specifies the simulated time duration in microseconds for each cycle of
      computation.

  delay
      Specifies the real time interval between timestep computations.

  randomBounce
      In each wall collision, a molecule bounces elastically (angle of
      incidence = angle of reflection). A component of randomness is added to
      this angle. RandomBounce varies from 0.0 (no randomness) to 1.0
      (completely random angle of incidence).

  equilibrium
      During each wall collision, a molecule's kinetic energy approaches that
      corresponding to the temperature of the wall. If equilibrium is 1.0,
      the molecule reaches the wall temperature immediately. For values
      between 1.0 and 0.0, the molecule approaches the temperature of the
      wall more slowly.

  maxMolecules
      Specifies the maximum number of molecules in the simulation.

BUGS
  When the chamber is resized, molecules should be rearranged appropriately.
  Instead, the molecule arrays are reinitialized.

SEE ALSO
  X(1X), xwd(1X)

AUTHOR
  Larry Medwin

Index for Section 1X

Alphabetical listing for X

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