[examples] fix tetra.py
@@ -9,13 +9,12 @@ from siconos.mechanics.collision.tools import Contactor
from siconos.io.mechanics_run import MechanicsHdf5Runner
import siconos.numerics as Numerics
from siconos.mechanics.collision.convexhull import ConvexHull
-
-options = siconos.mechanics.collision.bullet.SiconosBulletOptions()
-options.worldScale = 1.0
+from siconos.mechanics.collision.bullet import SiconosBulletOptions
# Control the number of perturbations applied to generate multipoint
# surface-surface contact manifolds. Default is 5 and 5, this is
# just demonstrating how to change them.
+options = SiconosBulletOptions()
options.perturbationIterations = 4
options.minimumPointsPerturbationThreshold = 4
