Geometry, nesting and import code now call PortableMath instead of
System.Math for Sin, Cos, Tan, Atan, Atan2, Asin and Acos (Core, Engine,
IO, Data; 269 calls in 64 files). A test fails if those projects call the
runtime's trig again.
With the runtime's trig, Windows and Linux disagreed in the last bit at
non-quarter angles and the same job could nest differently: the
learned-angle nests (a cross fixture) placed 23 parts in Strip on Windows
and 28 on Linux. Now every Engine.Tests pin gives the same layout on both
(3600 passing on Linux and on DesktopPC), Linux layouts are unchanged, and
the learned-angle rows are re-pinned to the shared layouts, which pass the
overlap and work-area checks, and run on every platform again.
Fixes Project Memory 518f3b58.
System.Math's Sin, Cos and Atan2 call the C runtime, and Windows' UCRT and
Linux's glibc differ in the last bit at many angles that are not quarter
turns. Nesting turns those bits into different tie and tolerance decisions,
so the same job nests differently on the desktop and on Linux (Project
Memory 518f3b58).
PortableMath ports fdlibm's Sin, Cos, Atan and Atan2, which use only IEEE
exact operations, and builds Tan, Asin and Acos on them with Sqrt. Results
stay within one ulp of the runtime (a few for the derived functions) and
hash to the same digest on Linux and on Windows (DesktopPC). Nothing calls
it yet.
aj