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Initial revision

NAME
    Decal - node representing a decal of coplanar polygons

INHERITS FROM
    SoSeparator

SYNOPSIS
    #include "Decal.h"

	Methods from class Decal

		Decal()

DESCRIPTION
    The first child of a Decal is defined to be the base and is drawn first.
    The other children are layers to be drawn above the base in the order
    defined.  Some or all of the layers can be coplanar with the base.  The
    geometries of the layers must lie within the geometry of the base 
    otherwise the results are incorrect.

METHODS
		Decal()
	Creates a decal node.

FILE FORMAT/DEFAULTS
    Decal {
    }

SAMPLE FILES
    coplanar.iv:
	A scene containing 3 coplanar squares (white base, and red and cyan
	layers on top) under a separator.  Demonstrates depth buffer conflicts.

    decal.iv:
	The same scene with the coplanar faces defined under a decal node.