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.
MinimumBoundingRectangle(Polygon) evaluated only the first (n + 1) / 2
edges, assuming opposite edges give the same rectangle. That holds only
for centrally symmetric hulls: for the triangle (0,0), (10,0), (12,1) it
returned area 12 instead of 10, depending on vertex order.
Every edge is now a candidate. A second-half edge replaces the best only
when smaller beyond rounding, so symmetric hulls (rectangles, best-fit
pairs, whose MBR angle PairEvaluator uses directly) keep their previous
orientation instead of flipping 180 degrees on floating-point noise.
On the Desktop problem nests, 8 of 160 drawing entries now get a smaller
MBR (0.004% to 3.2%) and a turned canonical frame; none changed without a
real area gain. The problem-nest corpus is unchanged against f51e5aef.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Repo-wide sweep with the pinned CSharpier 1.3.0 tool. Whitespace and
line-wrapping only; OpenNest.Engine.Tests (109) and OpenNest.IO.Tests
pass after reformat, full solution builds 0 errors.
Added .csharpierignore so csproj/config XML keeps its existing layout
(CSharpier's XML wrapping churns attributes with zero benefit).
Formatting is now enforceable: dotnet csharpier check . passes.
Opposite hull edges (180° apart) produce identical bounding rectangles
(width/height swapped), so only half the edges need to be checked to
find the minimum area. Applied to the unconstrained overload only.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
aj
