xgas(1X)																  xgas(1X)

NAME

       xgas - animated simulation of an ideal gas

SYNOPSIS

       xgas [-option...]

OPTIONS

       This  is  a  toolkit  program;  all the usual toolkit options are available.  Sets the autoStart resource.  Sets the timeStepSize resource.
       Sets the delay resource.  Sets the randomBounce resource.  Sets the equilibrium resource.  Sets the maxMolecules resource.  Sets the  fore-
       ground.	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 temper-
       ature. 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: Starts the simulation automatically.  Good for canned demos.  Specifies the simulated time
       duration in microseconds for each cycle of computation.	Specifies the real time interval between timestep computations.  In each wall col-
       lision, a molecule bounces elastically (angle of incidence = angle of reflection). A component of randomness is added to this  angle.  Ran-
       domBounce  varies from 0.0 (no randomness) to 1.0 (completely random angle of incidence).  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 imme-
       diately.  For values between 1.0 and 0.0, the molecule approaches the temperature of the wall more slowly.  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

																	  xgas(1X)