ocs_doc_api: Phase 2c-ii — dimension sub-types (radius/diameter/angular)

- CreateDimensionRadius/CreateDimensionDiameter (DimensionRadialSpec) +
  CreateDimensionAngular (DimensionAngularSpec) ops (append-only).
- backend add_dimension_radius/diameter (DimensionRadius/DimensionDiameter::new)
  + add_dimension_angular (DimensionAngular3Pt::new computes angle);
  dimension_measurement returns degrees for angular sub-types.
- facade create_dimension_radius/diameter/angular; spec constructors; api_reference
  + binding_schema regenerated; mocks + baseline.
- Test phase2cii_dimension_radius_diameter_angular -> 613 host lib + 3 consistency green.

crates/ocs_doc_api/src/backend.rs

@@ -63,6 +63,15 @@ pub trait DocApiBackend {
     /// Add a linear `DIMENSION`; returns the fresh `ObjectId`.
     fn add_dimension_linear(&mut self, spec: &crate::ops::DimensionSpec) -> ApiResult<ObjectId>;
 
+    /// Add a radial `DIMENSION`; returns the fresh `ObjectId`.
+    fn add_dimension_radius(&mut self, spec: &crate::ops::DimensionRadialSpec) -> ApiResult<ObjectId>;
+
+    /// Add a diameter `DIMENSION`; returns the fresh `ObjectId`.
+    fn add_dimension_diameter(&mut self, spec: &crate::ops::DimensionRadialSpec) -> ApiResult<ObjectId>;
+
+    /// Add a 3-point angular `DIMENSION`; returns the fresh `ObjectId`.
+    fn add_dimension_angular(&mut self, spec: &crate::ops::DimensionAngularSpec) -> ApiResult<ObjectId>;
+
     /// A dimension's measured value (distance for linear/radius, degrees for angular).
     fn dimension_measurement(&self, id: ObjectId) -> ApiResult<f64>;
 

crates/ocs_doc_api/src/executor.rs

@@ -269,6 +269,24 @@ pub fn apply_op<B: DocApiBackend>(b: &mut B, op: Operation) -> ApiResult<Receipt
             b.finalize_op();
             OpOutcome::NewId(id)
         }
+        Operation::CreateDimensionRadius(spec) => {
+            b.push_undo(name);
+            let id = b.add_dimension_radius(spec)?;
+            b.finalize_op();
+            OpOutcome::NewId(id)
+        }
+        Operation::CreateDimensionDiameter(spec) => {
+            b.push_undo(name);
+            let id = b.add_dimension_diameter(spec)?;
+            b.finalize_op();
+            OpOutcome::NewId(id)
+        }
+        Operation::CreateDimensionAngular(spec) => {
+            b.push_undo(name);
+            let id = b.add_dimension_angular(spec)?;
+            b.finalize_op();
+            OpOutcome::NewId(id)
+        }
     };
     Ok(Receipt {
         outcome: Some(outcome),

crates/ocs_doc_api/src/facade.rs

@@ -539,6 +539,32 @@ impl CurveCollection {
         Ok(Entity::new(self.session.clone(), id))
     }
 
+    /// A radial DIMENSION for the circle centered at `center` through `point`.
+    pub fn create_dimension_radius(&self, center: [f64; 3], point: [f64; 3]) -> ApiResult<Dimension> {
+        self.create_dim_radial(Operation::CreateDimensionRadius, center, point)
+    }
+    /// A diameter DIMENSION for the circle with chord points `center`/`point`.
+    pub fn create_dimension_diameter(&self, center: [f64; 3], point: [f64; 3]) -> ApiResult<Dimension> {
+        self.create_dim_radial(Operation::CreateDimensionDiameter, center, point)
+    }
+    fn create_dim_radial(
+        &self,
+        op: impl Fn(crate::ops::DimensionRadialSpec) -> Operation,
+        center: [f64; 3],
+        point: [f64; 3],
+    ) -> ApiResult<Dimension> {
+        let receipt = self.session.apply_op(op(crate::ops::DimensionRadialSpec { center, point }))?;
+        let id = receipt.outcome.and_then(|o| o.new_id()).ok_or_else(|| ApiError::Transport("create_dimension returned no id".into()))?;
+        Ok(Dimension::new(self.session.clone(), id))
+    }
+    /// A 3-point angular DIMENSION (vertex + one point on each leg).
+    pub fn create_dimension_angular(&self, vertex: [f64; 3], first_point: [f64; 3], second_point: [f64; 3], arc_location: [f64; 3]) -> ApiResult<Dimension> {
+        let receipt = self.session.apply_op(Operation::CreateDimensionAngular(crate::ops::DimensionAngularSpec {
+            vertex, first_point, second_point, arc_location,
+        }))?;
+        let id = receipt.outcome.and_then(|o| o.new_id()).ok_or_else(|| ApiError::Transport("create_dimension returned no id".into()))?;
+        Ok(Dimension::new(self.session.clone(), id))
+    }
     /// A linear DIMENSION between `first_point` and `second_point`, with the
     /// dimension line placed at `definition_point`. `measurement()` reads the value.
     pub fn create_dimension_linear(&self, first_point: [f64; 3], second_point: [f64; 3], definition_point: [f64; 3]) -> ApiResult<Dimension> {

crates/ocs_doc_api/src/gen/api_reference.md

@@ -133,6 +133,9 @@ Linear dimension between two measured points. measurement() reads the distance;
 ### Constructors (`doc.curves()`)
 
 - **create_dimension_linear**(first_point: [f64; 3], second_point: [f64; 3], definition_point: [f64; 3]) -> `Dimension` — `CreateDimensionLinear`
+- **create_dimension_radius**(center: [f64; 3], point: [f64; 3]) -> `Dimension` — `CreateDimensionRadius`
+- **create_dimension_diameter**(center: [f64; 3], point: [f64; 3]) -> `Dimension` — `CreateDimensionDiameter`
+- **create_dimension_angular**(vertex: [f64; 3], first_point: [f64; 3], second_point: [f64; 3], arc_location: [f64; 3]) -> `Dimension` — `CreateDimensionAngular`
 
 ### Methods
 

crates/ocs_doc_api/src/gen/ops_gen.rs

@@ -7,7 +7,7 @@
 use serde::{Deserialize, Serialize};
 
 use crate::id::ObjectId;
-use crate::ops::{BoolOp, Curve2Spec, DimensionSpec, EntitySpec, HatchSpec, InsertSpec, MTextSpec, PlacementSpec, RasterImageSpec, SolidPrimitive, TextSpec, ViewportSpec};
+use crate::ops::{BoolOp, Curve2Spec, DimensionAngularSpec, DimensionRadialSpec, DimensionSpec, EntitySpec, HatchSpec, InsertSpec, MTextSpec, PlacementSpec, RasterImageSpec, SolidPrimitive, TextSpec, ViewportSpec};
 
 /// A typed write operation (plan §5). Each variant is ONE atomic host call = one
 /// undo step. Append new variants at the END only.
@@ -48,4 +48,8 @@ pub enum Operation {
     CreateRasterImage(RasterImageSpec),
     // multi-profile solid
     Loft { profiles: Vec<ObjectId> },
+    // dimension sub-types
+    CreateDimensionRadius(DimensionRadialSpec),
+    CreateDimensionDiameter(DimensionRadialSpec),
+    CreateDimensionAngular(DimensionAngularSpec),
 }

crates/ocs_doc_api/src/ops.rs

@@ -116,6 +116,26 @@ pub struct DimensionSpec {
     pub definition_point: [f64; 3],
 }
 
+/// Construction spec for a radial/diameter `DIMENSION`: the circle center and a
+/// point on the circle (radius) or a chord point (diameter).
+#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
+pub struct DimensionRadialSpec {
+    /// Center of the arc/circle (radius) or first chord point (diameter).
+    pub center: [f64; 3],
+    /// A point on the arc/circle (radius) or the far chord point (diameter).
+    pub point: [f64; 3],
+}
+
+/// Construction spec for a 3-point angular `DIMENSION`: vertex + one point on
+/// each leg, plus the dimension-arc location.
+#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
+pub struct DimensionAngularSpec {
+    pub vertex: [f64; 3],
+    pub first_point: [f64; 3],
+    pub second_point: [f64; 3],
+    pub arc_location: [f64; 3],
+}
+
 /// Construction spec for a `RASTER_IMAGE`: an image file placed at
 /// `insertion_point` with per-pixel world-unit vectors `u_vector`/`v_vector` and
 /// pixel `size` (width, height). The host auto-registers the ImageDefinition.
@@ -187,6 +207,9 @@ impl crate::gen::Operation {
             SetViewportView { .. } => "SetViewportView",
             CreateRasterImage(_) => "CreateRasterImage",
             Loft { .. } => "Loft",
+            CreateDimensionRadius(_) => "CreateDimensionRadius",
+            CreateDimensionDiameter(_) => "CreateDimensionDiameter",
+            CreateDimensionAngular(_) => "CreateDimensionAngular",
         }
     }
 }