nx_itrig.nx

nx_itrig.nx -- Provides integer trigonometric functions using 5th-order Taylor series approximations for angles in rad*4096 units. nx_itrig.nx -- SHARED integer trig (extracted from the proven nx_wasm_mineworld implementation per the reuse law: skeleton/animation/robotics/regions all need rotations; nobody re-derives Taylor coefficients). Angle unit = rad*4096 (PI4096=12868, PI2_4096=6434); values fx4096. 5th-order Taylor folded to [-PI/2,PI/2], max error ~0.6% (gate-proven in the mineworld tick gate T0). ALL INTEGER. license_tier: ORIGINAL THE FIXED-POINT UNIT THIS WHOLE LIBRARY IS DEFINED IN -- the fx4096 of the header line above, the same 4096 as in the function names. It arrived here as `IT_MAGIC_4096`, auto-hoisted, wedged BETWEEN the two halves of this file's own header comment, and named after its own value: a name that restates the number is less greppable than the bare literal was, and it told the next reader nothing about what the quantity IS. It is the angle-and-value scale, so it is named for that.