brep_kernel/abi/
handles.rs

1use super::*;
2
3#[wasm_bindgen]
4pub struct WasmNurbsCurve {
5    pub(crate) curve: NurbsCurve,
6}
7
8#[wasm_bindgen]
9pub struct WasmNurbsSurface {
10    pub(crate) surface: NurbsSurface,
11}
12
13/// A solid encoded as one flat `Float64Array` plus a tiny JSON side channel
14/// for face/edge names — the zero-JSON result path for topology-heavy ops.
15/// Getters consume the buffers (each may be read once) to avoid double copies.
16#[wasm_bindgen]
17pub struct WasmSolidBuffer {
18    pub(crate) data: Vec<f64>,
19    pub(crate) names_json: String,
20    pub(crate) metadata_json: String,
21}
22
23#[wasm_bindgen]
24impl WasmSolidBuffer {
25    pub fn take_data(&mut self) -> Vec<f64> {
26        std::mem::take(&mut self.data)
27    }
28
29    pub fn names_json(&self) -> String {
30        self.names_json.clone()
31    }
32
33    /// Operation-specific extras (e.g. offset-shell face images); "{}" when
34    /// the operation has none.
35    pub fn metadata_json(&self) -> String {
36        self.metadata_json.clone()
37    }
38}
39
40pub(crate) fn solid_buffer(solid: &BrepSolid, metadata_json: String) -> Result<WasmSolidBuffer, JsValue> {
41    let (data, names) = encode_solid(solid).map_err(javascript_error)?;
42    Ok(WasmSolidBuffer {
43        data,
44        names_json: serde_json::to_string(&names)
45            .map_err(|error| javascript_error(error.to_string()))?,
46        metadata_json,
47    })
48}
49
50/// Tessellation output as typed arrays; getters consume the buffers.
51#[wasm_bindgen]
52pub struct WasmMeshBuffers {
53    pub(crate) positions: Vec<f64>,
54    pub(crate) normals: Vec<f64>,
55    pub(crate) indices: Vec<u32>,
56    pub(crate) face_ids: Vec<u32>,
57}
58
59#[wasm_bindgen]
60impl WasmMeshBuffers {
61    pub fn take_positions(&mut self) -> Vec<f64> {
62        std::mem::take(&mut self.positions)
63    }
64
65    pub fn take_normals(&mut self) -> Vec<f64> {
66        std::mem::take(&mut self.normals)
67    }
68
69    pub fn take_indices(&mut self) -> Vec<u32> {
70        std::mem::take(&mut self.indices)
71    }
72
73    pub fn take_face_ids(&mut self) -> Vec<u32> {
74        std::mem::take(&mut self.face_ids)
75    }
76}
77
78// ---------------------------------------------------------------------------
79// Persistent solid handle registry (Rust-pipeline migration, Stage 1).
80//
81// Keeps resident BrepSolids in the (single-threaded) main-thread wasm instance,
82// keyed by an opaque u32 handle, so ops consume/produce handles instead of
83// re-serializing the full topology across the wasm boundary on every call. The host pulls only
84// tessellation / mass-props / names across the boundary, and only when it needs
85// them — this is the foundation that eliminates the per-op round-trip (see
86//   the Rust pipeline-migration design, Stage 1).
87//
88// Handle lifetime is EXPLICIT: register_* mints a handle, free_solid drops it.
89// The wasm32 heap has a 4 GB ceiling and heavy solids are MB-scale resident, so
90// callers MUST free handles they no longer need. register_* keeps full arena +
91// validate (external / first-crossing ingest); kernel-produced results from the
92// *_handle ops are trusted (no double-validate — the kernel just built them).
93// ---------------------------------------------------------------------------
94thread_local! {
95    static SOLID_REGISTRY: std::cell::RefCell<SolidRegistry> =
96        std::cell::RefCell::new(SolidRegistry::new());
97}
98
99pub(crate) struct SolidRegistry {
100    pub(crate) next: u32,
101    pub(crate) solids: std::collections::HashMap<u32, BrepSolid>,
102}
103
104impl SolidRegistry {
105    fn new() -> Self {
106        Self {
107            next: 1,
108            solids: std::collections::HashMap::new(),
109        }
110    }
111    fn insert(&mut self, solid: BrepSolid) -> u32 {
112        let handle = self.next;
113        self.next = self.next.wrapping_add(1).max(1);
114        self.solids.insert(handle, solid);
115        handle
116    }
117}
118
119pub(crate) fn register_solid_value(solid: BrepSolid) -> u32 {
120    SOLID_REGISTRY.with(|registry| registry.borrow_mut().insert(solid))
121}
122
123/// Run `f` against a resident solid by handle (immutable borrow).
124pub(crate) fn with_registered_solid<T>(
125    handle: u32,
126    f: impl FnOnce(&BrepSolid) -> Result<T, JsValue>,
127) -> Result<T, JsValue> {
128    SOLID_REGISTRY.with(|registry| {
129        let registry = registry.borrow();
130        let solid = registry
131            .solids
132            .get(&handle)
133            .ok_or_else(|| javascript_error(format!("unknown solid handle {handle}")))?;
134        f(solid)
135    })
136}
137
138/// `String`-error sibling of [`with_registered_solid`] for the Rust feature
139/// pipeline, which stays JsValue-free internally (JsValue only at the wasm
140/// boundary; the host test target cannot run JsValue error paths). Short borrow:
141/// never hold the registry across a feature execution.
142pub(crate) fn with_registered_solid_str<T>(
143    handle: u32,
144    f: impl FnOnce(&BrepSolid) -> Result<T, String>,
145) -> Result<T, String> {
146    SOLID_REGISTRY.with(|registry| {
147        let registry = registry.borrow();
148        let solid = registry
149            .solids
150            .get(&handle)
151            .ok_or_else(|| format!("unknown solid handle {handle}"))?;
152        f(solid)
153    })
154}
155
156/// Run `f` against two resident solids in a single short borrow (the boolean /
157/// two-operand op shape). `String` error so the feature pipeline stays
158/// JsValue-free. Never held across a feature execution (the RefCell would fight
159/// a re-entrant borrow otherwise).
160pub(crate) fn with_two_registered_solids<T>(
161    a: u32,
162    b: u32,
163    f: impl FnOnce(&BrepSolid, &BrepSolid) -> Result<T, String>,
164) -> Result<T, String> {
165    SOLID_REGISTRY.with(|registry| {
166        let registry = registry.borrow();
167        let sa = registry
168            .solids
169            .get(&a)
170            .ok_or_else(|| format!("unknown solid handle {a}"))?;
171        let sb = registry
172            .solids
173            .get(&b)
174            .ok_or_else(|| format!("unknown solid handle {b}"))?;
175        f(sa, sb)
176    })
177}
178
179/// Replace a resident solid's CONTENT under its EXISTING handle. The component
180/// re-pose lane (`feature_pipeline::component::update_component_transform`)
181/// mutates geometry in place so the handle — which the SceneMap, the history
182/// cache, and the display layer all hold — stays valid; a rigid re-pose keeps
183/// every topology id and name, so nothing keyed by them moves. Errors on an
184/// unknown handle (never silently mints one).
185pub(crate) fn replace_registered_solid(handle: u32, solid: BrepSolid) -> Result<(), String> {
186    SOLID_REGISTRY.with(|registry| {
187        let mut registry = registry.borrow_mut();
188        match registry.solids.get_mut(&handle) {
189            Some(slot) => {
190                *slot = solid;
191                Ok(())
192            }
193            None => Err(format!("unknown solid handle {handle}")),
194        }
195    })
196}
197
198/// Drop a resident solid by handle (feature-pipeline-internal, `pub(crate)`
199/// sibling of the wasm `free_solid`). No-op if the handle is unknown. Callers
200/// MUST free handles they no longer need — the wasm32 heap has a 4 GB ceiling.
201pub(crate) fn free_registered_solid(handle: u32) {
202    SOLID_REGISTRY.with(|registry| {
203        registry.borrow_mut().solids.remove(&handle);
204    });
205}
206
207/// Ingest a solid from the flat f64 codec into the resident registry (arena +
208/// validate kept — external / first-crossing ingest). Returns an opaque handle.
209#[wasm_bindgen]
210pub fn register_solid_buffer(data: &[f64], names_json: &str) -> Result<u32, JsValue> {
211    let names: SolidNames = if names_json.trim().is_empty() {
212        SolidNames::default()
213    } else {
214        serde_json::from_str(names_json).map_err(|error| javascript_error(error.to_string()))?
215    };
216    let solid = decode_solid(data, &names).map_err(javascript_error)?;
217    let solid = TopologyArena::from_brep(&solid)
218        .and_then(|arena| arena.to_brep())
219        .map_err(javascript_error)?;
220    let issues = solid.validate();
221    if !issues.is_empty() {
222        return Err(javascript_error(format!(
223            "register_solid_buffer: invalid topology: {issues:?}"
224        )));
225    }
226    Ok(register_solid_value(solid))
227}
228
229/// Ingest a solid from JSON into the resident registry (arena + validate kept).
230#[wasm_bindgen]
231pub fn register_solid_json(solid_json: &str) -> Result<u32, JsValue> {
232    let solid: BrepSolid =
233        serde_json::from_str(solid_json).map_err(|error| javascript_error(error.to_string()))?;
234    let solid = TopologyArena::from_brep(&solid)
235        .and_then(|arena| arena.to_brep())
236        .map_err(javascript_error)?;
237    let issues = solid.validate();
238    if !issues.is_empty() {
239        return Err(javascript_error(format!(
240            "register_solid_json: invalid topology: {issues:?}"
241        )));
242    }
243    Ok(register_solid_value(solid))
244}
245
246/// Drop a resident solid. No-op if the handle is unknown.
247#[wasm_bindgen]
248pub fn free_solid(handle: u32) {
249    SOLID_REGISTRY.with(|registry| {
250        registry.borrow_mut().solids.remove(&handle);
251    });
252}
253
254/// Number of resident solids (diagnostics / handle-leak detection).
255#[wasm_bindgen]
256pub fn registered_solid_count() -> usize {
257    SOLID_REGISTRY.with(|registry| registry.borrow().solids.len())
258}
259
260/// Boolean of two resident solids -> a NEW resident handle. The result never
261/// crosses the boundary as topology; only its handle is returned. Kernel-produced
262/// result is trusted (no double-validate).
263#[wasm_bindgen]
264pub fn boolean_handle(
265    a: u32,
266    b: u32,
267    operation: &str,
268    tolerance: f64,
269    merge_coplanar_faces: bool,
270) -> Result<u32, JsValue> {
271    let operation = match operation {
272        "union" => BooleanOperation::Union,
273        "intersect" => BooleanOperation::Intersect,
274        "subtract" => BooleanOperation::Subtract,
275        _ => return Err(javascript_error("unknown boolean operation".into())),
276    };
277    let result = SOLID_REGISTRY.with(|registry| {
278        let registry = registry.borrow();
279        let sa = registry
280            .solids
281            .get(&a)
282            .ok_or_else(|| javascript_error(format!("unknown solid handle {a}")))?;
283        let sb = registry
284            .solids
285            .get(&b)
286            .ok_or_else(|| javascript_error(format!("unknown solid handle {b}")))?;
287        boolean_operation(
288            sa,
289            sb,
290            operation,
291            &BooleanOptions {
292                tolerance,
293                merge_coplanar_faces,
294                ..BooleanOptions::default()
295            },
296        )
297        .map_err(javascript_error)
298    })?;
299    Ok(register_solid_value(result))
300}
301
302/// Tessellate a resident solid to watertight mesh buffers (the buffers cross the
303/// boundary; the solid does not).
304#[wasm_bindgen]
305pub fn tessellate_handle(handle: u32, chord_tolerance: f64) -> Result<WasmMeshBuffers, JsValue> {
306    with_registered_solid(handle, |solid| {
307        let mesh = tessellate_brep_watertight(solid, chord_tolerance).map_err(javascript_error)?;
308        Ok(WasmMeshBuffers {
309            positions: mesh.positions,
310            normals: mesh.normals,
311            indices: mesh.indices,
312            face_ids: mesh.face_ids,
313        })
314    })
315}
316
317/// Analytic mass properties of a resident solid (a handful of scalars).
318#[wasm_bindgen]
319pub fn mass_properties_handle(handle: u32) -> Result<String, JsValue> {
320    with_registered_solid(handle, |solid| {
321        let properties = solid_mass_properties(solid).map_err(javascript_error)?;
322        serde_json::to_string(&properties).map_err(|error| javascript_error(error.to_string()))
323    })
324}
325
326/// Rigid/affine transform of a resident solid -> a NEW resident handle (Stage 1b;
327/// unblocks Transform/Pattern/bakeTransform from the legacy serialize lane). The
328/// result never crosses the boundary as topology. Kernel-produced, so trusted.
329#[wasm_bindgen]
330pub fn transform_handle(
331    handle: u32,
332    matrix: &[f64],
333    reverse_orientation: bool,
334) -> Result<u32, JsValue> {
335    let matrix: [f64; 16] = matrix
336        .try_into()
337        .map_err(|_| javascript_error("transform matrix must contain 16 values".into()))?;
338    let transform = AffineTransform::new(matrix).map_err(javascript_error)?;
339    let result = with_registered_solid(handle, |solid| {
340        transform_brep(solid, transform, reverse_orientation).map_err(javascript_error)
341    })?;
342    Ok(register_solid_value(result))
343}
344
345/// The resident solid's face id -> name map (Stage 1b; lets the host rebuild its
346/// selection/name index from a handle without materializing the full graph).
347#[wasm_bindgen]
348pub fn face_names_handle(handle: u32) -> Result<String, JsValue> {
349    with_registered_solid(handle, |solid| {
350        let mut map: Vec<(u64, Option<String>)> = Vec::new();
351        for shell in &solid.shells {
352            for face in &shell.faces {
353                map.push((face.id, face.name.clone()));
354            }
355        }
356        serde_json::to_string(&map).map_err(|error| javascript_error(error.to_string()))
357    })
358}
359
360// ===========================================================================
361// Native in-process display accessors (brep-render). Plain pub fns — NOT
362// #[wasm_bindgen] — so they add nothing to the wasm export surface; the native
363// renderer links the kernel as an rlib and reads display data with no JSON or
364// typed-array boundary.
365// ===========================================================================
366
367/// Native sibling of [`boolean_handle`] (String errors — constructing a
368/// `JsValue` error panics off-wasm): boolean of two RESIDENT solids → a NEW
369/// resident handle, operands untouched. The assembly interference check's
370/// non-destructive INTERSECT lane; callers free the result handle when done.
371pub fn boolean_handle_native(
372    a: u32,
373    b: u32,
374    operation: BooleanOperation,
375    options: &BooleanOptions,
376) -> Result<u32, String> {
377    let result =
378        with_two_registered_solids(a, b, |sa, sb| boolean_operation(sa, sb, operation, options))?;
379    Ok(register_solid_value(result))
380}
brep_kernel/abi/handles.rs

brep_kernel/abi/
handles.rs
