Merge PR #1045: complete UNION behavior

Cargo.lock

@@ -882,7 +882,7 @@ checksum = "fc652a48c352aef3ea3aed32080501cf3ef6ed5da78602a020c991775b0aff04"
 [[package]]
 name = "cadkernel"
 version = "0.1.0"
-source = "git+https://github.com/HakanSeven12/cadkernel.git?rev=6a5e6fc2822f6af6b2611cd605b44437b35158f0#6a5e6fc2822f6af6b2611cd605b44437b35158f0"
+source = "git+https://github.com/ramox81/cadkernel.git?rev=328b55a9a45bc2118526a49156bcb94e46f10444#328b55a9a45bc2118526a49156bcb94e46f10444"
 dependencies = [
  "acadrust",
  "cavalier_contours",

Cargo.toml

@@ -31,7 +31,7 @@ rfd = "0.17"
 clap = { version = "4", features = ["derive", "string"] }
 env_logger = "0.11"
 acadrust = { git = "https://github.com/HakanSeven12/cadcodec.git", rev = "5b56571a190e7a17c8f12d36390d2938b0fb72f7", features = ["serde"] }
-cadkernel = { git = "https://github.com/HakanSeven12/cadkernel.git", rev = "6a5e6fc2822f6af6b2611cd605b44437b35158f0", features = ["acis", "offset"] }
+cadkernel = { git = "https://github.com/ramox81/cadkernel.git", rev = "328b55a9a45bc2118526a49156bcb94e46f10444", features = ["acis", "offset"] }
 dwg-thumbnailer = { path = "crates/dwg-thumbnailer" }
 flate2 = "1"
 image = { version = "0.25", default-features = false, features = ["png", "jpeg", "bmp", "tiff"] }

crates/ocs_doc_api/Cargo.toml

@@ -15,7 +15,7 @@ thiserror = "1"
 
 # Host adapters convert ObjectId to acadrust handles; kernel handles stay local.
 acadrust = { git = "https://github.com/HakanSeven12/cadcodec.git", rev = "5b56571a190e7a17c8f12d36390d2938b0fb72f7", features = ["serde"], optional = true }
-cadkernel = { git = "https://github.com/HakanSeven12/cadkernel.git", rev = "6a5e6fc2822f6af6b2611cd605b44437b35158f0", features = ["acis", "offset"], optional = true }
+cadkernel = { git = "https://github.com/ramox81/cadkernel.git", rev = "328b55a9a45bc2118526a49156bcb94e46f10444", features = ["acis", "offset"], optional = true }
 ocs_plugin_api = { path = "../ocs_plugin_api", optional = true, features = ["host"] }
 
 [build-dependencies]

src/app/commands/draw.rs

@@ -972,32 +972,46 @@ impl OpenCADStudio {
             }
 
             // ── Solid booleans ─────────────────────────────────────────────
-            "UNION" | "INTERSECT" => {
+            "UNION" => {
                 use crate::modules::model::boolean_cmd::BoolOp;
-                if let Some(op) = BoolOp::from_id(cmd) {
-                    let solid_count = {
-                        let scene = &self.tabs[i].scene;
-                        scene
-                            .selected_handles_in_order()
-                            .into_iter()
-                            .filter(|handle| !scene.is_layer_locked(*handle))
-                            .filter(|handle| {
-                                matches!(
-                                    scene.document.get_entity(*handle),
-                                    Some(acadrust::EntityType::Solid3D(_))
-                                )
-                            })
-                            .take(2)
-                            .count()
-                    };
-                    if solid_count < 2 {
-                        use crate::modules::draw::select::SelectObjectsCommand;
-                        let selection = SelectObjectsCommand::new(cmd);
-                        self.command_line.push_info(&selection.prompt());
-                        self.tabs[i].active_cmd = Some(Box::new(selection));
-                    } else {
-                        return Some(self.solid_boolean(op));
-                    }
+                if self.union_ready() {
+                    return Some(self.solid_boolean(BoolOp::Union));
+                }
+                use crate::modules::draw::select::SelectObjectsCommand;
+                let selection = SelectObjectsCommand::plain("UNION", "UNIONAPPLY");
+                self.command_line.push_info(&selection.prompt());
+                self.tabs[i].active_cmd = Some(Box::new(selection));
+            }
+
+            "UNIONAPPLY" => {
+                use crate::modules::model::boolean_cmd::BoolOp;
+                return Some(self.solid_boolean(BoolOp::Union));
+            }
+
+            "INTERSECT" => {
+                use crate::modules::model::boolean_cmd::BoolOp;
+                let solid_count = {
+                    let scene = &self.tabs[i].scene;
+                    scene
+                        .selected_handles_in_order()
+                        .into_iter()
+                        .filter(|handle| !scene.is_layer_locked(*handle))
+                        .filter(|handle| {
+                            matches!(
+                                scene.document.get_entity(*handle),
+                                Some(acadrust::EntityType::Solid3D(_))
+                            )
+                        })
+                        .take(2)
+                        .count()
+                };
+                if solid_count < 2 {
+                    use crate::modules::draw::select::SelectObjectsCommand;
+                    let selection = SelectObjectsCommand::new(cmd);
+                    self.command_line.push_info(&selection.prompt());
+                    self.tabs[i].active_cmd = Some(Box::new(selection));
+                } else {
+                    return Some(self.solid_boolean(BoolOp::Intersect));
                 }
             }
 
@@ -1069,9 +1083,9 @@ impl OpenCADStudio {
             // REGION — convert selected closed boundaries (closed polylines /
             // circles) into Region entities (one wire loop each).
             "REGION" | "REG" => {
-                use acadrust::entities::{Region, Wire};
+                use acadrust::entities::Region;
                 use acadrust::types::Vector3;
-                let mut loops: Vec<Vec<Vector3>> = Vec::new();
+                let mut regions = Vec::new();
                 for (_, e) in self.tabs[i].scene.selected_entities().iter() {
                     let supported = matches!(
                         e,
@@ -1079,32 +1093,39 @@ impl OpenCADStudio {
                             if pl.is_closed && pl.vertices.len() >= 3
                     ) || matches!(e, acadrust::EntityType::Circle(_));
                     if supported {
-                        let Some(curve) = crate::entities::curve::entity_curve(e) else {
+                        let Some((plane, loops, true)) =
+                            crate::scene::model::presspull_model::profile_geometry(e)
+                        else {
                             continue;
                         };
-                        loops.push(
-                            crate::entities::curve::curve_points(&curve)
-                                .into_iter()
-                                .map(|point| Vector3::new(point[0], point[1], point[2]))
-                                .collect(),
+                        let Some(body) = cadkernel::brep::planar_region(plane, &loops) else {
+                            continue;
+                        };
+                        let mut region = Region::new();
+                        region.point_of_reference = Vector3::new(
+                            plane.origin[0],
+                            plane.origin[1],
+                            plane.origin[2],
                         );
+                        region.common.layer = self.tabs[i].active_layer.clone();
+                        regions.push((region, body));
                     }
                 }
-                if loops.is_empty() {
+                if regions.is_empty() {
                     self.command_line
                         .push_error(crate::t!("REGION: select closed polylines or circles.").as_ref());
                 } else {
                     self.push_undo_snapshot(i, "REGION");
-                    let count = loops.len();
-                    for pts in loops {
-                        let mut w = Wire::new();
-                        let first = pts.first().copied().unwrap_or(Vector3::new(0.0, 0.0, 0.0));
-                        w.points = pts;
-                        let mut r = Region::new();
-                        r.point_of_reference = first;
-                        r.wires = vec![w];
-                        r.common.layer = self.tabs[i].active_layer.clone();
-                        self.tabs[i].scene.add_entity(acadrust::EntityType::Region(r));
+                    let count = regions.len();
+                    let mut created = Vec::with_capacity(count);
+                    for (region, body) in regions {
+                        let handle = self.add_region_model(region, body);
+                        if handle.is_null() {
+                            self.tabs[i].scene.rollback_new_entities(&created);
+                            self.discard_last_undo_entry(i);
+                            return Some(iced::Task::none());
+                        }
+                        created.push(handle);
                     }
                     self.tabs[i].dirty = true;
                     self.command_line

src/app/model_ops.rs

@@ -1,7 +1,9 @@
 // Kernel B-rep solid modelling and exact ACIS persistence.
 
 use acadrust::{
-    entities::Solid3D, objects::SolidHistoryOperation, EntityType, Handle,
+    entities::{EntityCommon, Region, Solid3D, Surface, SurfaceKind},
+    objects::SolidHistoryOperation,
+    EntityType, Handle,
 };
 use cadkernel::brep::Body;
 use iced::Task;
@@ -11,19 +13,112 @@ use crate::modules::model::boolean_cmd::BoolOp;
 use crate::scene::model::solid_history;
 use crate::scene::model::solid_model::{self, Bool};
 
+#[derive(Clone, Copy, PartialEq, Eq)]
+enum UnionEntityKind {
+    Solid,
+    Region,
+    Surface,
+}
+
+impl UnionEntityKind {
+    fn from_entity(entity: &EntityType) -> Option<Self> {
+        Some(match entity {
+            EntityType::Solid3D(_) => Self::Solid,
+            EntityType::Region(_) => Self::Region,
+            EntityType::Surface(_) => Self::Surface,
+            _ => return None,
+        })
+    }
+}
+
+struct UnionGroup {
+    kind: UnionEntityKind,
+    handles: Vec<Handle>,
+}
+
+struct PreparedUnion {
+    kind: UnionEntityKind,
+    handles: Vec<Handle>,
+    body: Body,
+    common: EntityCommon,
+}
+
+fn inherited_common(source: &EntityCommon) -> EntityCommon {
+    let mut result = EntityCommon::new();
+    result.layer = source.layer.clone();
+    result.color = source.color;
+    result.line_weight = source.line_weight;
+    result.linetype = source.linetype.clone();
+    result.linetype_handle = source.linetype_handle;
+    result.linetype_scale = source.linetype_scale;
+    result.transparency = source.transparency;
+    result.color_name = source.color_name.clone();
+    result.invisible = source.invisible;
+    result.color_book_handle = source.color_book_handle;
+    result.full_visual_style_handle = source.full_visual_style_handle;
+    result.face_visual_style_handle = source.face_visual_style_handle;
+    result.edge_visual_style_handle = source.edge_visual_style_handle;
+    result.material_flags = source.material_flags;
+    result.material_handle = source.material_handle;
+    result.shadow_flags = source.shadow_flags;
+    result.plotstyle_flags = source.plotstyle_flags;
+    result.plotstyle_handle = source.plotstyle_handle;
+    result
+}
+
+fn union_bodies(
+    kind: UnionEntityKind,
+    bodies: Vec<Body>,
+) -> Result<Body, cadkernel::brep::Snag> {
+    if kind == UnionEntityKind::Solid {
+        let mut operands = bodies.into_iter();
+        let mut result = operands
+            .next()
+            .ok_or(cadkernel::brep::Snag::CutRefused)?;
+        for operand in operands {
+            result = solid_model::boolean_result(Bool::Union, &result, &operand)?;
+        }
+        return Ok(result);
+    }
+    let references = bodies.iter().collect::<Vec<_>>();
+    let tolerance = cadkernel::brep::operation_tolerance(&references);
+    cadkernel::brep::union_planar_regions(&bodies, tolerance)
+}
+
 impl super::OpenCADStudio {
     /// Add a solid and register its persistent B-rep.
     pub(super) fn add_solid_model(
+        &mut self,
+        entity: EntityType,
+        solid: Body,
+        history: SolidHistoryOperation,
+    ) -> Handle {
+        self.add_solid_model_inner(entity, solid, history, true)
+    }
+
+    fn add_solid_model_preserving_style(
+        &mut self,
+        entity: EntityType,
+        solid: Body,
+        history: SolidHistoryOperation,
+    ) -> Handle {
+        self.add_solid_model_inner(entity, solid, history, false)
+    }
+
+    fn add_solid_model_inner(
         &mut self,
         mut entity: EntityType,
         solid: Body,
         history: SolidHistoryOperation,
+        apply_creation_style: bool,
     ) -> Handle {
         let i = self.active_tab;
         let EntityType::Solid3D(inner) = &mut entity else {
             return Handle::NULL;
         };
-        inner.common.plotstyle_flags = 2;
+        if apply_creation_style {
+            inner.common.plotstyle_flags = 2;
+        }
         inner.wires = solid_model::edge_wires(&solid);
         let Some(document) = crate::scene::convert::acis_export::solid_to_sat(&solid)
         else {
@@ -32,7 +127,12 @@ impl super::OpenCADStudio {
             return Handle::NULL;
         };
         inner.set_sat_document(&document);
-        let Some(handle) = self.commit_entity_handle(entity) else {
+        let handle = if apply_creation_style {
+            self.commit_entity_handle(entity)
+        } else {
+            self.commit_entity_handle_preserve_style(entity)
+        };
+        let Some(handle) = handle else {
             return Handle::NULL;
         };
         let require_complete = matches!(history, SolidHistoryOperation::Loft(_));
@@ -51,15 +151,34 @@ impl super::OpenCADStudio {
     /// Add an open sheet body as a persistent Surface entity and register its
     /// exact B-rep for shaded and wireframe display.
     pub(super) fn add_surface_model(
+        &mut self,
+        entity: EntityType,
+        surface: Body,
+    ) -> Handle {
+        self.add_surface_model_inner(entity, surface, true)
+    }
+
+    fn add_surface_model_preserving_style(
+        &mut self,
+        entity: EntityType,
+        surface: Body,
+    ) -> Handle {
+        self.add_surface_model_inner(entity, surface, false)
+    }
+
+    fn add_surface_model_inner(
         &mut self,
         mut entity: EntityType,
         surface: Body,
+        apply_creation_style: bool,
     ) -> Handle {
         let i = self.active_tab;
         let EntityType::Surface(inner) = &mut entity else {
             return Handle::NULL;
         };
-        inner.common.plotstyle_flags = 2;
+        if apply_creation_style {
+            inner.common.plotstyle_flags = 2;
+        }
         inner.wires = solid_model::edge_wires(&surface);
         let Some(document) = crate::scene::convert::acis_export::solid_to_sat(&surface)
         else {
@@ -68,7 +187,12 @@ impl super::OpenCADStudio {
             return Handle::NULL;
         };
         inner.acis_data = acadrust::entities::AcisData::from_sat(&document.to_sat_string());
-        let Some(handle) = self.commit_entity_handle(entity) else {
+        let handle = if apply_creation_style {
+            self.commit_entity_handle(entity)
+        } else {
+            self.commit_entity_handle_preserve_style(entity)
+        };
+        let Some(handle) = handle else {
             return Handle::NULL;
         };
         let require_complete = self.tabs[i].scene.document.get_entity(handle).is_some_and(|entity|
@@ -81,6 +205,44 @@ impl super::OpenCADStudio {
         handle
     }
 
+    pub(super) fn add_region_model(&mut self, region: Region, body: Body) -> Handle {
+        self.add_region_model_inner(region, body, false)
+    }
+
+    fn add_region_model_preserving_style(&mut self, region: Region, body: Body) -> Handle {
+        self.add_region_model_inner(region, body, true)
+    }
+
+    fn add_region_model_inner(
+        &mut self,
+        mut region: Region,
+        body: Body,
+        preserve_style: bool,
+    ) -> Handle {
+        let i = self.active_tab;
+        region.wires = solid_model::edge_wires(&body);
+        let Some(document) = crate::scene::convert::acis_export::solid_to_sat(&body) else {
+            self.command_line
+                .push_error(crate::t!("The region could not be encoded as ACIS.").as_ref());
+            return Handle::NULL;
+        };
+        region.set_sat_document(&document);
+        let entity = EntityType::Region(region);
+        let handle = if preserve_style {
+            self.commit_entity_handle_preserve_style(entity)
+        } else {
+            self.commit_entity_handle(entity)
+        };
+        let Some(handle) = handle else {
+            return Handle::NULL;
+        };
+        if !self.tabs[i].scene.register_solid_model(handle, body) {
+            self.tabs[i].scene.rollback_new_entities(&[handle]);
+            return Handle::NULL;
+        }
+        handle
+    }
+
     fn selected_solid_handles(&mut self) -> Vec<Handle> {
         let i = self.active_tab;
         let mut handles: Vec<Handle> = self.tabs[i]
@@ -100,6 +262,38 @@ impl super::OpenCADStudio {
         handles
     }
 
+    fn selected_union_groups(&self) -> Vec<UnionGroup> {
+        let scene = &self.tabs[self.active_tab].scene;
+        let mut groups: Vec<UnionGroup> = Vec::new();
+        for handle in scene.selected_handles_in_order() {
+            if scene.is_layer_locked(handle) {
+                continue;
+            }
+            let Some(kind) = scene
+                .document
+                .get_entity(handle)
+                .and_then(UnionEntityKind::from_entity)
+            else {
+                continue;
+            };
+            if let Some(group) = groups.iter_mut().find(|group| group.kind == kind) {
+                group.handles.push(handle);
+            } else {
+                groups.push(UnionGroup {
+                    kind,
+                    handles: vec![handle],
+                });
+            }
+        }
+        groups
+    }
+
+    pub(super) fn union_ready(&self) -> bool {
+        self.selected_union_groups()
+            .iter()
+            .any(|group| group.handles.len() >= 2)
+    }
+
     fn replace_solid_body(&mut self, handle: Handle, result: Body, label: &str) -> bool {
         let i = self.active_tab;
         let Some(document) =
@@ -197,6 +391,9 @@ impl super::OpenCADStudio {
 
     /// Run a boolean over the selected solids in selection order.
     pub(super) fn solid_boolean(&mut self, op: BoolOp) -> Task<Message> {
+        if op == BoolOp::Union {
+            return self.union_selected_entities();
+        }
         let i = self.active_tab;
         let handles = self.selected_solid_handles();
         if handles.len() < 2 {
@@ -243,6 +440,131 @@ impl super::OpenCADStudio {
         Task::none()
     }
 
+    fn union_selected_entities(&mut self) -> Task<Message> {
+        let i = self.active_tab;
+        let mut groups = self.selected_union_groups();
+        let handles = groups
+            .iter()
+            .flat_map(|group| group.handles.iter().copied())
+            .collect::<Vec<_>>();
+        self.tabs[i].scene.restore_solid_models(&handles);
+        for group in &mut groups {
+            group
+                .handles
+                .retain(|handle| self.tabs[i].scene.solid_models.contains_key(handle));
+        }
+        groups.retain(|group| group.handles.len() >= 2);
+        if groups.is_empty() {
+            self.command_line.push_error(
+                crate::t!("UNION: select at least two solids, Regions, or planar Surfaces of the same type.")
+                    .as_ref(),
+            );
+            return Task::none();
+        }
+
+        let mut prepared = Vec::with_capacity(groups.len());
+        for group in groups {
+            let bodies = group
+                .handles
+                .iter()
+                .filter_map(|handle| self.tabs[i].scene.solid_models.get(handle).cloned())
+                .collect::<Vec<_>>();
+            let result = match union_bodies(group.kind, bodies) {
+                Ok(result) => result,
+                Err(cadkernel::brep::Snag::NoClosedForm) => {
+                    self.command_line.push_error(
+                        crate::t!("UNION: the selected geometry includes an unsupported surface intersection.")
+                            .as_ref(),
+                    );
+                    return Task::none();
+                }
+                Err(cadkernel::brep::Snag::Coincident) => {
+                    self.command_line.push_error(
+                        crate::t!("UNION: the selected coincident geometry is ambiguous.").as_ref(),
+                    );
+                    return Task::none();
+                }
+                Err(cadkernel::brep::Snag::CutRefused) => {
+                    self.command_line.push_error(
+                        crate::t!("UNION: the selected topology could not be closed safely.").as_ref(),
+                    );
+                    return Task::none();
+                }
+            };
+            if crate::scene::convert::acis_export::solid_to_sat(&result).is_none() {
+                self.command_line.push_error(
+                    crate::t!("The UNION result could not be encoded as ACIS.").as_ref(),
+                );
+                return Task::none();
+            }
+            let Some(source) = group
+                .handles
+                .first()
+                .and_then(|handle| self.tabs[i].scene.document.get_entity(*handle))
+            else {
+                return Task::none();
+            };
+            prepared.push(PreparedUnion {
+                kind: group.kind,
+                handles: group.handles,
+                body: result,
+                common: inherited_common(source.common()),
+            });
+        }
+
+        let consumed = prepared
+            .iter()
+            .flat_map(|group| group.handles.iter().copied())
+            .collect::<Vec<_>>();
+        self.push_undo_snapshot(i, "UNION");
+        let mut created = Vec::with_capacity(prepared.len());
+        for group in prepared {
+            let handle = match group.kind {
+                UnionEntityKind::Solid => {
+                    let history = solid_history::brep_op(&group.body);
+                    let mut entity = Solid3D::new();
+                    entity.common = group.common;
+                    self.add_solid_model_preserving_style(
+                        EntityType::Solid3D(entity),
+                        group.body,
+                        history,
+                    )
+                }
+                UnionEntityKind::Region => {
+                    let mut entity = Region::new();
+                    entity.common = group.common;
+                    self.add_region_model_preserving_style(entity, group.body)
+                }
+                UnionEntityKind::Surface => {
+                    let mut entity = Surface::new(SurfaceKind::Generic);
+                    entity.common = group.common;
+                    self.add_surface_model_preserving_style(
+                        EntityType::Surface(entity),
+                        group.body,
+                    )
+                }
+            };
+            if handle.is_null() {
+                self.tabs[i].scene.rollback_new_entities(&created);
+                self.discard_last_undo_entry(i);
+                return Task::none();
+            }
+            created.push(handle);
+        }
+
+        self.tabs[i].scene.erase_entities(&consumed);
+        self.tabs[i].scene.deselect_all();
+        for handle in &created {
+            self.tabs[i].scene.select_entity(*handle, false);
+        }
+        self.tabs[i].dirty = true;
+        self.refresh_properties();
+        self.command_line.push_output(
+            crate::tf!("UNION: created %{count} result object(s).", count = created.len()).as_ref(),
+        );
+        Task::none()
+    }
+
     pub(super) fn solid_subtract(
         &mut self,
         bases: &[Handle],

src/app/properties.rs

@@ -440,15 +440,15 @@ impl OpenCADStudio {
                     let display_entity = dispatch::entity_in_working_plane(contextual.as_ref(), plane);
                     let entity = &display_entity;
                     let group_names = self.tabs[i].scene.group_names_for_entity(handle);
-                    let specialized_primitive =
-                        crate::scene::model::solid_history::has_specialized_primitive_properties(
+                    let compact_solid =
+                        crate::scene::model::solid_history::has_compact_solid_properties(
                             &self.tabs[i].scene.document,
                             handle,
                         );
                     let mut sections =
                         dispatch::properties_sectioned(handle, entity, &text_style_names);
-                    if specialized_primitive {
-                        retain_specialized_primitive_sections(&mut sections);
+                    if compact_solid {
+                        retain_compact_solid_sections(&mut sections);
                     }
                     sections.extend(
                         crate::scene::model::solid_history::primitive_properties(
@@ -636,7 +636,7 @@ impl OpenCADStudio {
                         }
                     }
 
-                    if !specialized_primitive && matches!(
+                    if !compact_solid && matches!(
                         entity,
                         acadrust::EntityType::Solid3D(_)
                             | acadrust::EntityType::Region(_)
@@ -710,7 +710,7 @@ impl OpenCADStudio {
                         }
                     }
 
-                    if !specialized_primitive {
+                    if !compact_solid {
                         sections.extend(crate::entities::object_data::sections(
                             &self.tabs[i].scene.document,
                             &self.tabs[i].scene.object_data_cache,
@@ -2068,8 +2068,8 @@ impl OpenCADStudio {
                             });
                         }
                     }
-                    if specialized_primitive {
-                        retain_specialized_primitive_sections(&mut sections);
+                    if compact_solid {
+                        retain_compact_solid_sections(&mut sections);
                     }
                     let title = match entity {
                         acadrust::EntityType::Insert(ins) => {
@@ -2166,7 +2166,7 @@ impl OpenCADStudio {
                         .collect();
                     let mut sections = aggregate_sections(&local_refs, &text_style_names);
                     if local_refs.iter().all(|(handle, _)| {
-                        crate::scene::model::solid_history::has_specialized_primitive_properties(
+                        crate::scene::model::solid_history::has_compact_solid_properties(
                             &self.tabs[i].scene.document,
                             *handle,
                         )
@@ -2591,7 +2591,7 @@ impl OpenCADStudio {
         &mut self,
         entity: acadrust::EntityType,
     ) -> Option<Handle> {
-        self.commit_entity_handle_with_policies(entity, false, false)
+        self.commit_entity_handle_with_policies(entity, false, false, false)
     }
 
     pub(super) fn commit_entity_handle_with_dimension_policy(
@@ -2603,6 +2603,7 @@ impl OpenCADStudio {
             entity,
             preserve_dimension_layer_and_style,
             false,
+            false,
         )
     }
 
@@ -2610,7 +2611,14 @@ impl OpenCADStudio {
         &mut self,
         entity: acadrust::EntityType,
     ) -> Option<Handle> {
-        self.commit_entity_handle_with_policies(entity, false, true)
+        self.commit_entity_handle_with_policies(entity, false, true, false)
+    }
+
+    pub(super) fn commit_entity_handle_preserve_style(
+        &mut self,
+        entity: acadrust::EntityType,
+    ) -> Option<Handle> {
+        self.commit_entity_handle_with_policies(entity, false, true, true)
     }
 
     fn commit_entity_handle_with_policies(
@@ -2618,6 +2626,7 @@ impl OpenCADStudio {
         mut entity: acadrust::EntityType,
         preserve_dimension_layer_and_style: bool,
         preserve_entity_layer: bool,
+        preserve_entity_style: bool,
     ) -> Option<Handle> {
         let i = self.active_tab;
         let tracks_dimension_chain = matches!(
@@ -2735,25 +2744,32 @@ impl OpenCADStudio {
             }
         }
 
-        crate::scene::view::dispatch::apply_color(&mut entity, self.ribbon.active_color);
-        crate::scene::view::dispatch::apply_common_prop(
-            &mut entity,
-            "linetype",
-            &self.ribbon.active_linetype.clone(),
-        );
-        crate::scene::view::dispatch::apply_line_weight(&mut entity, self.ribbon.active_lineweight);
-        // CELTSCALE (header.current_entity_linetype_scale): new entities
-        // pick up the document's saved per-entity linetype scale. The user
-        // can override per entity later via the properties panel.
-        let celtscale = self.tabs[i].scene.document.header.current_entity_linetype_scale;
-        if (celtscale - 1.0).abs() > 1e-9 && celtscale.abs() > 1e-9 {
-            entity.common_mut().linetype_scale = celtscale;
+        if !preserve_entity_style {
+            crate::scene::view::dispatch::apply_color(&mut entity, self.ribbon.active_color);
+            crate::scene::view::dispatch::apply_common_prop(
+                &mut entity,
+                "linetype",
+                &self.ribbon.active_linetype.clone(),
+            );
+            crate::scene::view::dispatch::apply_line_weight(
+                &mut entity,
+                self.ribbon.active_lineweight,
+            );
+            // CELTSCALE (header.current_entity_linetype_scale): new entities
+            // pick up the document's saved per-entity linetype scale. The user
+            // can override per entity later via the properties panel.
+            let celtscale = self.tabs[i].scene.document.header.current_entity_linetype_scale;
+            if (celtscale - 1.0).abs() > 1e-9 && celtscale.abs() > 1e-9 {
+                entity.common_mut().linetype_scale = celtscale;
+            }
         }
 
-        crate::scene::creation_style::apply_current_creation_styles(
-            &self.tabs[i].scene.document,
-            &mut entity,
-        );
+        if !preserve_entity_style {
+            crate::scene::creation_style::apply_current_creation_styles(
+                &self.tabs[i].scene.document,
+                &mut entity,
+            );
+        }
         if let (Some((layer, style_name)), acadrust::EntityType::Dimension(dimension)) =
             (inherited_dimension, &mut entity)
         {
@@ -3061,7 +3077,7 @@ fn aggregate_solid_history_sections(
     merged
 }
 
-fn retain_specialized_primitive_sections(
+fn retain_compact_solid_sections(
     sections: &mut Vec<crate::scene::model::object::PropSection>,
 ) {
     sections.iter_mut().for_each(|section| {

src/modules/draw/select.rs

@@ -17,6 +17,7 @@ use crate::modules::draw::fence::FencePick;
 use crate::scene::model::wire_model::WireModel;
 
 pub struct SelectObjectsCommand {
+    prompt_cmd: String,
     pending_cmd: String,
     /// Selection accumulated so far (kept in sync with the scene selection by
     /// each `on_selection_complete` call). Applied on Enter when `commit_on_enter`.
@@ -24,6 +25,8 @@ pub struct SelectObjectsCommand {
     /// When true, gathering continues until Enter / right-click commits the set.
     /// When false, the first completed selection action fires immediately.
     commit_on_enter: bool,
+    /// Whether the generic selection methods are shown as command buttons.
+    show_options: bool,
     /// A Fence / WPolygon / CPolygon path being picked point by point. While
     /// one is under way the host must send clicks here as points rather than
     /// treating them as picks, which is what `is_selection_gathering` reports.
@@ -37,9 +40,25 @@ impl SelectObjectsCommand {
     /// Standard selection set: accumulate picks, apply on Enter / right-click.
     pub fn new(pending_cmd: &str) -> Self {
         Self {
+            prompt_cmd: pending_cmd.to_string(),
             pending_cmd: pending_cmd.to_string(),
             handles: Vec::new(),
             commit_on_enter: true,
+            show_options: true,
+            pick: None,
+            pick_crossing: true,
+        }
+    }
+
+    /// Plain gather prompt with no generic selection-method buttons. The
+    /// visible command name may differ from the private apply command.
+    pub fn plain(prompt_cmd: &str, pending_cmd: &str) -> Self {
+        Self {
+            prompt_cmd: prompt_cmd.to_string(),
+            pending_cmd: pending_cmd.to_string(),
+            handles: Vec::new(),
+            commit_on_enter: true,
+            show_options: false,
             pick: None,
             pick_crossing: true,
         }
@@ -49,9 +68,11 @@ impl SelectObjectsCommand {
     /// immediately, with no Enter (used by commands that act on one object).
     pub fn instant(pending_cmd: &str) -> Self {
         Self {
+            prompt_cmd: pending_cmd.to_string(),
             pending_cmd: pending_cmd.to_string(),
             handles: Vec::new(),
             commit_on_enter: false,
+            show_options: false,
             pick: None,
             pick_crossing: true,
         }
@@ -82,12 +103,12 @@ impl CadCommand for SelectObjectsCommand {
         if self.commit_on_enter && !self.handles.is_empty() {
             t!(
                 "%{cmd}  Select objects (%{count} selected, Enter to apply):",
-                cmd = self.pending_cmd,
+                cmd = self.prompt_cmd,
                 count = self.handles.len()
             )
             .into_owned()
         } else {
-            t!("%{cmd}  Select objects:", cmd = self.pending_cmd).into_owned()
+            t!("%{cmd}  Select objects:", cmd = self.prompt_cmd).into_owned()
         }
     }
 
@@ -108,7 +129,7 @@ impl CadCommand for SelectObjectsCommand {
     // they work typed as well — these buttons only surface them, which is what
     // the on-screen keyboard-less case needs.
     fn options(&self) -> Vec<CmdOption> {
-        if self.commit_on_enter {
+        if self.commit_on_enter && self.show_options {
             vec![
                 CmdOption::new(t!("Window").as_ref(), "W"),
                 CmdOption::new(t!("Crossing").as_ref(), "C"),

src/scene/convert/solid3d_tess.rs

@@ -163,6 +163,10 @@ pub fn kernel_surface_body(surface: &Surface) -> Option<KernelBody> {
     kernel_acis_body(&surface.acis_data)
 }
 
+pub fn kernel_region_body(region: &Region) -> Option<KernelBody> {
+    kernel_acis_body(&region.acis_data)
+}
+
 fn kernel_acis_body(acis: &acadrust::entities::AcisData) -> Option<KernelBody> {
     let sat = parse_acis(
         || acis.parse(),

src/scene/entity.rs

@@ -605,6 +605,9 @@ impl Scene {
                     Some(EntityType::Surface(surface)) => {
                         crate::scene::convert::solid3d_tess::kernel_surface_body(surface)
                     }
+                    Some(EntityType::Region(region)) => {
+                        crate::scene::convert::solid3d_tess::kernel_region_body(region)
+                    }
                     _ => None,
                 })?;
                 Some((handle, body))

src/scene/model/solid_history.rs

@@ -214,6 +214,21 @@ pub fn has_specialized_primitive_properties(
     )
 }
 
+/// Solid history results whose public Properties palette is fully described by
+/// the common entity rows plus [`primitive_properties`].  A generic B-rep has
+/// no stable primitive dimensions to expose, but it still uses the compact
+/// Solid History palette rather than the internal ACIS/cache diagnostics.
+pub fn has_compact_solid_properties(
+    document: &acadrust::CadDocument,
+    handle: acadrust::Handle,
+) -> bool {
+    has_specialized_primitive_properties(document, handle)
+        || matches!(
+            document.solid_history_operation(handle),
+            Some(SolidHistoryOperation::Brep(_))
+        )
+}
+
 pub fn reference_point(operation: &SolidHistoryOperation) -> Option<glam::DVec3> {
     match operation {
         SolidHistoryOperation::Box(value) | SolidHistoryOperation::Wedge(value) => world_point(
@@ -975,6 +990,41 @@ fn cone_properties(
     ]
 }
 
+fn brep_properties(
+    document: &acadrust::CadDocument,
+    handle: acadrust::Handle,
+) -> Vec<PropSection> {
+    let (record_history, object_show_history, show_history_mode) =
+        history_flags(document, handle).unwrap_or((false, false, 1));
+    let (show_history, show_history_editable) =
+        displayed_history_state(object_show_history, show_history_mode);
+    vec![PropSection {
+        title: t!("Solid History").into_owned(),
+        props: vec![
+            Property {
+                label: t!("History").into_owned(),
+                field: PROP_HISTORY,
+                value: PropValue::Choice {
+                    selected: if record_history { "Record" } else { "None" }.to_string(),
+                    options: vec!["None".to_string(), "Record".to_string()],
+                },
+            },
+            Property {
+                label: t!("Show History").into_owned(),
+                field: PROP_SHOW_HISTORY,
+                value: if show_history_editable {
+                    PropValue::Choice {
+                        selected: if show_history { "Yes" } else { "No" }.to_string(),
+                        options: vec!["No".to_string(), "Yes".to_string()],
+                    }
+                } else {
+                    PropValue::ReadOnly(if show_history { "Yes" } else { "No" }.to_string())
+                },
+            },
+        ],
+    }]
+}
+
 fn cylinder_properties(
     document: &acadrust::CadDocument,
     handle: acadrust::Handle,
@@ -1411,6 +1461,7 @@ pub fn primitive_properties(
             extrusion_properties(document, handle, value)
         }
         SolidHistoryOperation::Revolve(value) => revolve_properties(document, handle, value),
+        SolidHistoryOperation::Brep(_) => brep_properties(document, handle),
         _ => Vec::new(),
     }
 }

src/scene/model/solid_model.rs

@@ -365,13 +365,18 @@ pub enum Bool {
 /// missing, and passing that on unchanged is the point: a half-done boolean
 /// looks finished.
 pub fn boolean(op: Bool, a: &Body, b: &Body) -> Option<Body> {
+    boolean_result(op, a, b).ok()
+}
+
+/// Combine two solids while retaining the kernel's exact refusal reason.
+pub fn boolean_result(op: Bool, a: &Body, b: &Body) -> Result<Body, brep::Snag> {
     let how = match op {
         Bool::Union => brep::Operation::Union,
         Bool::Subtract => brep::Operation::Difference,
         Bool::Intersect => brep::Operation::Intersection,
     };
     let tolerance = brep::operation_tolerance(&[a, b]);
-    brep::combine(a.clone(), b.clone(), how, tolerance).ok()
+    brep::combine(a.clone(), b.clone(), how, tolerance)
 }
 
 // ── Tessellation ────────────────────────────────────────────────────────────