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src/scene/mesh_model.rs

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+// Triangle mesh model — produced by truck Shell/Solid tessellation.
+//
+// Stored alongside WireModels in the scene; rendered by the mesh pipeline
+// (wgpu TriangleList with depth test, flat normals).
+
+/// A tessellated triangle mesh ready to upload to the GPU.
+#[derive(Clone, Debug)]
+#[allow(dead_code)]
+pub struct MeshModel {
+    /// Unique identifier (entity handle value as decimal string).
+    pub name: String,
+    /// World-space vertex positions.
+    pub verts: Vec<[f32; 3]>,
+    /// Per-vertex normals (may be empty if not available).
+    pub normals: Vec<[f32; 3]>,
+    /// Triangle indices into `verts` (every 3 values = one triangle).
+    pub indices: Vec<u32>,
+    /// RGBA colour in [0, 1].
+    pub color: [f32; 4],
+    /// Whether this mesh is currently selected.
+    pub selected: bool,
+}
+
+impl MeshModel {
+    #[allow(dead_code)]
+    pub const WHITE: [f32; 4] = [1.00, 1.00, 1.00, 1.0];
+    pub const SELECTED: [f32; 4] = [0.15, 0.55, 1.00, 1.0];
+}