NAME
	  DtMtlIsValid - Get the state of the valid bits for the given
	  material.


     SYNOPSIS
	  #include <Dt.h>


	  int  DtMtlIsValid( char *name, int valid_bit )


     DESCRIPTION
	  DtMtlIsValid() returns 1 if none of the attributes of	a
	  material indicated by	name have changed for the current
	  frame, otherwise it returns 0.  The valid_bit	parameter is
	  used to check	if any or all attributes of the	material have
	  changed.  The	following attributes can be checked to see if
	  they have change from	the previous frame:

	  DT_MATERIAL -	if any of the attributes list below have
	  changed.
	  DT_MTL_AMBIENT_CLR - ambient color has changed.
	  DT_MTL_DIFFUSE_CLR - diffuse color has changed.
	  DT_MTL_SPECULAR_CLR -	specular color has changed.
	  DT_MTL_EMISSIVE_CLR -	emissive color has changed.
	  DT_MTL_SHININESS - shininess value has changed.
	  DT_MTL_TRANSPARENCY -	transparency value has changed.








     DIAGNOSTICS
     FILES
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