fix(solid): use kernel geometry

Derive extrusion, bounds, edges, and fill from cadkernel while preserving precise view filtering and stable GPU uploads.

src/scene/convert/tess.rs

@@ -1657,12 +1657,25 @@ pub(crate) fn set_wire_aabb(w: &mut WireModel, entity_box: [f32; 4]) {
     w.aabb = out;
 }
 
+fn entity_bounds(e: &acadrust::EntityType) -> ([f64; 3], [f64; 3]) {
+    if let acadrust::EntityType::Solid(solid) = e {
+        if let Some(bounds) = crate::entities::solid::wcs_bounds(solid) {
+            return (bounds.min, bounds.max);
+        }
+    }
+    let bounds = e.as_entity().bounding_box();
+    (
+        [bounds.min.x, bounds.min.y, bounds.min.z],
+        [bounds.max.x, bounds.max.y, bounds.max.z],
+    )
+}
+
 pub(crate) fn entity_aabb(e: &acadrust::EntityType) -> [f32; 4] {
-    let bbox = e.as_entity().bounding_box();
-    let min_x = (bbox.min.x) as f32;
-    let min_y = (bbox.min.y) as f32;
-    let max_x = (bbox.max.x) as f32;
-    let max_y = (bbox.max.y) as f32;
+    let (min, max) = entity_bounds(e);
+    let min_x = min[0] as f32;
+    let min_y = min[1] as f32;
+    let max_x = max[0] as f32;
+    let max_y = max[1] as f32;
     // The all-zero box is bounding_box()'s Default — returned by entities with
     // no usable box (unimplemented) — so treat it as UNBOUNDED (never
     // pre-rejected). A genuinely zero-size box *away* from the origin (e.g. a
@@ -1680,8 +1693,8 @@ pub(crate) fn entity_aabb(e: &acadrust::EntityType) -> [f32; 4] {
 /// indexing uses this so changing `world_offset` doesn't invalidate
 /// the index.
 pub(crate) fn entity_world_aabb_f64(e: &acadrust::EntityType) -> Option<[f64; 4]> {
-    let bbox = e.as_entity().bounding_box();
-    let (xmin, ymin, xmax, ymax) = (bbox.min.x, bbox.min.y, bbox.max.x, bbox.max.y);
+    let (min, max) = entity_bounds(e);
+    let (xmin, ymin, xmax, ymax) = (min[0], min[1], max[0], max[1]);
     if xmin == xmax && ymin == ymax {
         return None;
     }

src/scene/pipeline/face3d_gpu.rs

@@ -22,20 +22,48 @@ use crate::scene::model::wire_model::WireModel;
 use iced::wgpu;
 use iced::wgpu::util::DeviceExt;
 
-fn planar_solid_faces_view(wire: &WireModel, view_dir: glam::Vec3) -> bool {
+pub(crate) fn planar_solid_faces_view(wire: &WireModel, view_dir: glam::Vec3) -> bool {
     if !wire.fill_is_2d_solid || wire.fill_is_3d {
         return true;
     }
-    let view = view_dir.normalize_or_zero();
-    wire.fill_tris.chunks_exact(3).any(|triangle| {
-        let first = glam::Vec3::from_array(triangle[0]);
-        let second = glam::Vec3::from_array(triangle[1]);
-        let third = glam::Vec3::from_array(triangle[2]);
+    let view = view_dir.as_dvec3().normalize_or_zero();
+    let point = |index: usize| {
+        let high = wire.fill_tris[index];
+        let low = wire
+            .fill_tris_low
+            .get(index)
+            .copied()
+            .unwrap_or([0.0; 3]);
+        glam::DVec3::new(
+            high[0] as f64 + low[0] as f64,
+            high[1] as f64 + low[1] as f64,
+            high[2] as f64 + low[2] as f64,
+        )
+    };
+    (0..wire.fill_tris.len() / 3).any(|triangle| {
+        let first = point(triangle * 3);
+        let second = point(triangle * 3 + 1);
+        let third = point(triangle * 3 + 2);
         let normal = (second - first).cross(third - first).normalize_or_zero();
         normal.length_squared() > 0.0 && normal.dot(view).abs() >= 1.0 - 1.0e-5
     })
 }
 
+pub(crate) fn planar_solid_visibility_key(
+    wires: &[WireModel],
+    view_dir: glam::Vec3,
+) -> u64 {
+    let mut key = 0xcbf29ce484222325_u64;
+    for wire in wires
+        .iter()
+        .filter(|wire| wire.fill_is_2d_solid && !wire.fill_is_3d)
+    {
+        key ^= planar_solid_faces_view(wire, view_dir) as u64;
+        key = key.wrapping_mul(0x100000001b3);
+    }
+    key
+}
+
 // ── Vertex layout ──────────────────────────────────────────────────────────
 
 #[repr(C)]
@@ -88,8 +116,8 @@ impl Face3DVertex {
 // ── GPU handle ─────────────────────────────────────────────────────────────
 
 /// One vertex buffer + draw count. Fill data is split into as many chunks
-/// as the device's `max_buffer_size` requires: a mesh-heavy DWG (e.g. a
-/// Navisworks import) can hold tens of millions of fill triangles, and at
+/// as the device's `max_buffer_size` requires: a mesh-heavy drawing can hold
+/// tens of millions of fill triangles, and at
 /// 44 B/vertex a single batched buffer blows past the default 256 MB limit
 /// once enough layers are thawed — wgpu then raises an uncaptured
 /// validation error and aborts the process (#358). Same scheme as the

src/scene/pipeline/mod.rs

@@ -312,12 +312,8 @@ pub struct Pipeline {
     /// a pick bumps only `selection_generation`, refreshing the overlay without
     /// touching the main wire buffers.
     pub cached_selection: (u64, u64),
-    /// `(wire_content_id, face3d_fill_active, show_2d_solid_fills, view_dir)` the Face3D
-    /// edge/fill buffers were uploaded for. A stable content id avoids retaining
-    /// the resident wire Arc:
-    /// that Arc must stay uniquely owned by Scene so a small edit can splice it
-    /// in place instead of rebuilding the whole drawing.
-    pub cached_face3d_key: (u64, bool, bool, [u32; 3]),
+    /// Face upload key; keeps the resident wire Arc uniquely owned by Scene.
+    pub cached_face3d_key: (u64, bool, bool, u64),
     /// Handle → indices into the resident wire set, built once per wire upload
     /// (when `cached_wire_id` changes). Lets the selection/hover xray overlay
     /// gather just the highlighted entity's wires (`O(highlighted)`) instead of
@@ -2323,7 +2319,7 @@ impl Pipeline {
             cached_epoch: (u64::MAX, u64::MAX, u64::MAX),
             cached_wire_id: u64::MAX,
             cached_selection: (u64::MAX, u64::MAX),
-            cached_face3d_key: (u64::MAX, false, false, [u32::MAX; 3]),
+            cached_face3d_key: (u64::MAX, false, false, u64::MAX),
             wire_handle_index: std::sync::Arc::new(rustc_hash::FxHashMap::default()),
             render_sig: u64::MAX,
             skip_geometry: false,

src/scene/view/render.rs

@@ -378,7 +378,7 @@ impl shader::Primitive for Primitive {
                 inner.cached_wire_id = u64::MAX;
                 inner.cached_selection = (u64::MAX, u64::MAX);
                 inner.cached_mesh_content_id = u64::MAX;
-                inner.cached_face3d_key = (u64::MAX, false, false, [u32::MAX; 3]);
+                inner.cached_face3d_key = (u64::MAX, false, false, u64::MAX);
                 inner.cached_hatch_source = None;
                 inner.cached_preview_hatch_source = None;
                 inner.cached_wipeout_source = None;
@@ -485,11 +485,11 @@ impl shader::Primitive for Primitive {
             // the Wireframe overlay style.
             let face3d_fill_active = fill_mode && !vp.view_wireframe;
             let solid_fill_active = fill_mode && vp.show_2d_solid_fills;
-            let view_dir_key = [
-                vp.view_dir.x.to_bits(),
-                vp.view_dir.y.to_bits(),
-                vp.view_dir.z.to_bits(),
-            ];
+            let solid_visibility_key =
+                crate::scene::pipeline::face3d_gpu::planar_solid_visibility_key(
+                    &vp_wires,
+                    vp.view_dir,
+                );
             let fill_changed = inner.cached_fill_mode != fill_mode;
             let hatch_changed = inner
                 .cached_hatch_source
@@ -581,7 +581,7 @@ impl shader::Primitive for Primitive {
             if face3d_changed
                 || face3d_fill_active != inner.cached_face3d_key.1
                 || solid_fill_active != inner.cached_face3d_key.2
-                || view_dir_key != inner.cached_face3d_key.3
+                || solid_visibility_key != inner.cached_face3d_key.3
             {
                 inner.upload_face3d(
                     device,
@@ -599,7 +599,7 @@ impl shader::Primitive for Primitive {
                 vp.wire_content_id,
                 face3d_fill_active,
                 solid_fill_active,
-                view_dir_key,
+                solid_visibility_key,
             );
             // Wire buffers are world-space, so a camera move alone doesn't
             // change them — only the view_proj uniform (uploaded every frame).