feat: 性能基准测试套件 — M3 里程碑起步

bench/bench_boolean.cpp

@@ -13,7 +13,6 @@
 #include <vde/brep/modeling.h>
 #include <vde/mesh/mesh_boolean.h>
 #include <vde/mesh/halfedge_mesh.h>
-#include <vde/core/transform.h>
 #include <cmath>
 
 using namespace vde;
@@ -25,34 +24,19 @@ struct SpherePair {
     mesh::HalfedgeMesh b;
 };
 
-/// Create two intersecting spheres (sphere_a at (-0.5, 0, 0), sphere_b at (+0.5, 0, 0))
-SpherePair make_sphere_pair(int segments) {
-    int seg_u = segments;
-    int seg_v = std::max(segments / 2, 4);
+/// Create two intersecting spheres with approximately `face_count` faces each.
+/// sphere_a at origin, sphere_b translated by +1.0 along X (overlap ~0.5)
+SpherePair make_sphere_pair(int face_count) {
+    // make_sphere produces ~ 2 * seg_u * seg_v faces → solve for seg
+    int seg = std::max(static_cast<int>(std::ceil(std::sqrt(face_count / 2.0))), 4);
+    int seg_u = seg;
+    int seg_v = seg;
 
     auto sphere_a = brep::make_sphere(1.0, seg_u, seg_v).to_mesh();
     auto sphere_b = brep::make_sphere(1.0, seg_u, seg_v).to_mesh();
 
     // Translate sphere_b by +1.0 along X so they overlap by ~0.5
-    core::Transform3D t;
-    t.set_translation(core::Vector3D(1.0, 0.0, 0.0));
-
-    // Since HalfedgeMesh doesn't have a direct transform, we translate vertices manually
-    std::vector<core::Point3D> vb_verts;
-    for (size_t vi = 0; vi < sphere_b.num_vertices(); ++vi) {
-        auto p = sphere_b.vertex(vi);
-        vb_verts.push_back(core::Point3D(p.x() + 1.0, p.y(), p.z()));
-    }
-
-    // Rebuild: extract face vertex indices and rebuild mesh
-    mesh::HalfedgeMesh sphere_b_moved;
-    for (size_t fi = 0; fi < sphere_b.num_faces(); ++fi) {
-        auto fv = sphere_b.face_vertices(static_cast<int>(fi));
-        sphere_b_moved.add_face(fv);
-    }
-    // Overwrite vertices (add_face adds them at original positions)
-    // Actually we need a different approach — just vertex-move the existing mesh
-    // Best: build directly from triangles
+    // Rebuild from triangles with translated vertices
     mesh::HalfedgeMesh b_moved;
     std::vector<core::Point3D> all_verts;
     std::vector<std::array<int, 3>> all_tris;