Beta (Inputs.Base)Betaf64Coordinates: flat x, y pairs for polygons, x, y, z triples for triangle positions and
vertices, sixteen numbers for each frame of a loft, and the control points, weights and
knots of a brep node's curves and surfaces. Every number in it is finite and between minus
and plus one billion.
Betai32Triangle corners as positions counted from 0, three per triangle.
The numbers a recipe's nodes point into: coordinates in
f64, triangle indices ini32.