Amazon VERSION 2.0V1 Podręcznik Użytkownika Pobierz pdf (Strona 338)

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Control (UI) Default Value Function

derivatives

centered Yes Sets whether or not derivatives are calculated symmetric

with respect to the (u,v) parameterization. This setting

only takes effect when smooth shading is enabled.

extrapolate Yes Sets whether or not derivatives are extrapolated. This

setting only takes effect when smooth shading is

enabled.

dice

binary No A flag that sets whether the lowest level patches must be

diced into micropolygons with power of two dimensions.

hair No Specifically used for RiCurves geometry to make curves

that span multiple buckets cheaper to shade and more

memory efficient. When enabled Du() of any quantity is

0, with the exception Du(u) =1. This means that

derivatives across the width of curves are ill defined.

Therefore, this option should only be used for hair-like

(i.e. very thin) curves.

rasterorient Yes When set to Yes, uses oriented, rather than nonraster

oriented dicing.

strategy planarProjection Selects the dicing strategy. Under the default

planarProjection dicing rate is determined using the

screen space coordinates of a primitive, projected onto a

plane. The sphericalProjection strategy uses the

coordinates of a primitive projected onto a sphere, and

worldDistance uses Euclidian distances measured in

world space units.

Note: When using the worldDistance strategy, the dicing

camera is ignored.

5 NODES L-Q | PRMANOBJECTSETTINGS

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