fix: Delaunay3D circumcenter 完整实现 + 测试恢复

bench/bench_curves.cpp

@@ -0,0 +1,77 @@
+/// bench_curves.cpp — Bezier / BSpline evaluation benchmarks
+///
+/// Metrics:
+///   BezierEval/N{iterations}    — evaluate() throughput on a cubic Bezier
+///   BSplineEval/N{iterations}   — evaluate() throughput on a cubic BSpline
+
+#include <benchmark/benchmark.h>
+#include <vde/curves/bezier_curve.h>
+#include <vde/curves/bspline_curve.h>
+#include <vde/core/point.h>
+#include <random>
+#include <vector>
+
+using namespace vde;
+
+namespace {
+
+/// A cubic Bezier with control points scattered in [-10, 10]³
+curves::BezierCurve sample_bezier() {
+    static std::vector<core::Point3D> cp = {
+        {0.0, 0.0, 0.0}, {3.0, 5.0, -1.0}, {7.0, -2.0, 4.0}, {10.0, 3.0, 2.0}};
+    return curves::BezierCurve(cp);
+}
+
+/// A cubic uniform BSpline with 7 control points
+curves::BSplineCurve sample_bspline() {
+    static std::vector<core::Point3D> cp = {
+        {0.0, 0.0, 0.0}, {2.0, 4.0, -1.0}, {5.0, 1.0, 3.0},
+        {8.0, -1.0, 1.0}, {11.0, 3.0, -2.0}, {13.0, 2.0, 0.0}, {15.0, 0.0, 1.0}};
+    static std::vector<double> knots = {0,0,0,0, 0.25, 0.5, 0.75, 1,1,1,1};
+    return curves::BSplineCurve(cp, knots, 3);
+}
+
+/// N equally spaced t values in [0, 1]
+std::vector<double> sample_params(int n) {
+    std::vector<double> t;
+    t.reserve(n);
+    for (int i = 0; i < n; ++i)
+        t.push_back(static_cast<double>(i) / (n - 1));
+    return t;
+}
+
+} // namespace
+
+// ── Bezier ────────────────────────────────────────────────────────────
+
+static void BezierEval(benchmark::State& state) {
+    auto curve = sample_bezier();
+    auto params = sample_params(state.range(0));
+    double sum = 0;
+    for (auto _ : state) {
+        for (double t : params) {
+            auto p = curve.evaluate(t);
+            benchmark::DoNotOptimize(sum += p.x());
+        }
+    }
+    benchmark::DoNotOptimize(sum);
+    state.SetItemsProcessed(state.iterations() * params.size());
+}
+BENCHMARK(BezierEval)->Arg(10000)->Arg(100000);
+
+// ── BSpline ───────────────────────────────────────────────────────────
+
+static void BSplineEval(benchmark::State& state) {
+    auto curve = sample_bspline();
+    auto params = sample_params(state.range(0));
+    double sum = 0;
+    for (auto _ : state) {
+        for (double t : params) {
+            auto p = curve.evaluate(t);
+            benchmark::DoNotOptimize(sum += p.x());
+        }
+    }
+    benchmark::DoNotOptimize(sum);
+    state.SetItemsProcessed(state.iterations() * params.size());
+}
+BENCHMARK(BSplineEval)->Arg(10000)->Arg(100000);