The RenderMan Interface - Paul Bourke

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EXAMPLE
RiMatte (RI TRUE);
SEE ALSO
RiSurface
Geometry Attribute Type Default Description
Object-to-World transform identity Transformation from object
or model coordinates to
world coordinates.
Bound 6 floats infinite Subsequent geometric primitives
lie inside this box.
Detail Range 4 floats (0, 0, ∞, ∞) Current range of detail. If the
current detail is in this range,
geometric primitives are rendered.
Geometric Approximation
token value – The largest deviation of an
approximation of a surface
from the true surface in raster
coordinates.
Cubic Basis Matrices 2 matrices Bezier, Bezier Basis matrices for bicubic
patches. There is a separate
basis matrix for both the u
and the v directions.
Cubic Basis Steps 2 integers 3, 3
Trim Curves – – A list of trim curves which
bound NURBS.
Orientation token ”outside” Whether primitives are defined
in a left-handed or
right-handed coordinate system.
Number of Sides integer 2 Whether subsequent surfaces
are considered to have one or
two sides.
Displacement shader – A displacement shader that
specifies small changes in
surface geometry.
Table 4.11: Geometry Attributes
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