Produces a scalar information field evaluated over a surface domain.
Recommended range: [-1,1]
Remarks
Boundary fields are independent of the underlying surface geometry;
it's the sampler's job to determine how positions on a surface are represented
and provide the coordinates passed on to the field.
Boundary fields make no assumption about geometry.
The primary use case is spherical surfaces, where the sampler provides
normalized direction vectors with components in the range [-1, 1].
However, alternative samplers may represent other surface types, such as
planar surfaces, provided the field implementation supports the supplied
coordinate space.
Boundary fields should produce normalized values in the range [-1,1],
unless the mathematical representation requires another scale.
Produces a scalar information field evaluated over a surface domain. Recommended range: [-1,1]
Remarks
Boundary fields are independent of the underlying surface geometry; it's the sampler's job to determine how positions on a surface are represented and provide the coordinates passed on to the field.
The primary use case is spherical surfaces, where the sampler provides normalized direction vectors with components in the range [-1, 1]. However, alternative samplers may represent other surface types, such as planar surfaces, provided the field implementation supports the supplied coordinate space.
Boundary fields should produce normalized values in the range [-1,1], unless the mathematical representation requires another scale.