Implement Delaunay3D math benchmarks (#39)

benchmarks/math/delaunay_3d.gd

@@ -0,0 +1,27 @@
+extends Benchmark
+
+const NUM_POINTS := 1_000
+const UPPER_LEFT_DOWN := Vector3(0.0, 0.0, 0.0)
+const BOTTOM_RIGHT_UP := Vector3(10.0, 10.0, 10.0)
+
+var rng := RandomNumberGenerator.new()
+
+func scatter_points_3D(num_points: int,
+					   upper_left_down: Vector3,
+					   bottom_right_up: Vector3) -> PackedVector3Array:
+	rng.seed = hash("Delaunay3D")
+	var points := PackedVector3Array()
+
+	for i in range(num_points):
+		points.append(Vector3(
+			rng.randf_range(upper_left_down.x, bottom_right_up.x),
+			rng.randf_range(upper_left_down.y, bottom_right_up.y),
+			rng.randf_range(upper_left_down.z, bottom_right_up.z)
+		))
+
+	return points
+
+var scattered_points := scatter_points_3D(NUM_POINTS, UPPER_LEFT_DOWN, BOTTOM_RIGHT_UP)
+
+func benchmark_delaunay3D() -> void:
+	Geometry3D.tetrahedralize_delaunay(scattered_points)