PolygonAttributes
node component controls: The PolygonAttributes object defines attributes for rendering
polygon primitives. The polygon attributes that can be defined are: * Rasterization
mode - defines how the polygon is drawn: as points, outlines, or filled.
* POLYGON_POINT - the polygon is rendered as points drawn at the vertices.
* POLYGON_LINE - the polygon is rendered as lines drawn between consecutive
vertices.
* POLYGON_FILL - the polygon is rendered by filling the interior between the
vertices. The default mode.* Face culling - defines which polygons are culled
(discarded) before they are converted to screen coordinates.
* CULL_NONE - disables face culling.
* CULL_BACK - culls all front-facing polygons. The default.
* CULL_FRONT - culls all back-facing polygons.* Back-face normal flip - specifies
whether vertex normals of back-facing polygons are flipped (negated) prior to
lighting. The setting is either true, meaning to flip back-facing normals, or
false. The default is false.
* Offset - the depth values of all pixels generated by polygon rasterization
can be offset by a value that is computed for that polygon. Two values are used
to specify the offset:* Offset bias - the constant polygon offset that is added
to the final device coordinate Z value of polygon primitives.
* Offset factor - the factor to be multiplied by the slope of the polygon and
then added to the final, device coordinate Z value of the polygon primitives.These
values can be either positive or negative. The default for both of these values
is 0.0.