embedded3 S2-7: oblique instrument gains registration sweep / slope subset / z-flow skip / merged-cell count (RTX_E3_OBLIQUE_{C0_SHIFTS,SLOPES,ZFLOW,NS}) and the operator probe (oblique_operator_probe: predictor acceleration on the exact centroid-valued field by aperture band, cut-cell divergence under four valuations, spurious pressure; z-flow control); two host prototypes, default off, device refuses them: RTX_E3_CV_SIDES=exact (the momentum CV's side apertures from the interpolant on the half faces / cell-centre planes) and RTX_E3_WALL_ORDER2=centroid (the quadratic wall gradient's second point at the neighbour's centroid distance); quad_fraction / tri_area_fraction lifted to module fns (default path digit-identical: oblique record, host suite 21/21, device cut tests)

Co-Authored-By: Claude Fable 5.1 <[email protected]>

crates/specialized/rtx-cfd/src/solvers/incompressible/embedded3/wall.rs

@@ -108,6 +108,12 @@ pub struct Mask {
     pub(super) exchange_convection_off: bool,
     /// The axis-distance implicit wall exchange (S2-5).
     pub(super) wall_exchange_axis: bool,
+    /// S2-7: the momentum control volumes' side apertures from the
+    /// interpolant on the sides' own corners (host prototype).
+    pub(super) cv_sides_exact: bool,
+    /// S2-7: the quadratic wall gradient's second point at the neighbour's
+    /// own centroid distance (host prototype).
+    pub(super) wall_order2_centroid: bool,
     /// The centroid prototype's pressure-gradient weights per u / v / w face.
     /// The centroid-distance cross diffusion (S2-5).
     pub(super) diffusion_centroid: bool,
@@ -534,6 +540,8 @@ impl Mask {
             wall_advancing: false,
             exchange_convection_off: false,
             wall_exchange_axis: false,
+            cv_sides_exact: false,
+            wall_order2_centroid: false,
             grad_weights: None,
             diffusion_centroid: false,
             face_shifts: None,