BoundKernel
A kernel reference bound to a field set: what evaluate() runs on the CPU, and what the viewport's spliced vertex shader reads (field-presentation §FVK-2, §FVG-2).
In the namespace field. Declared in src/libs/libfield/field/KernelEngine.hpp.
Detailed description
The inputs are the fields after every rule of the binding: a nested reference evaluated, a field in item axes turned to world axes, an engineering shear halved, the second input of a difference in the first one's unit. So the CPU rows and the GPU streams hold the same numbers.