def setup(self):
self.worldNP = render.attach_new_node('World')
# World
self.debugNP = self.worldNP.attach_new_node(BulletDebugNode('Debug'))
self.debugNP.show()
self.world = BulletWorld()
self.world.set_gravity(LVector3(0, 0, -9.81))
self.world.set_debug_node(self.debugNP.node())
# Ground
p0 = LPoint3(-20, -20, 0)
p1 = LPoint3(-20, 20, 0)
p2 = LPoint3(20, -20, 0)
p3 = LPoint3(20, 20, 0)
mesh = BulletTriangleMesh()
mesh.add_triangle(p0, p1, p2)
mesh.add_triangle(p1, p2, p3)
shape = BulletTriangleMeshShape(mesh, dynamic=False)
np = self.worldNP.attach_new_node(BulletRigidBodyNode('Mesh'))
np.node().add_shape(shape)
np.set_pos(0, 0, -4)
np.set_collide_mask(BitMask32.all_on())
self.world.attach(np.node())
# Soft body world information
info = self.world.get_world_info()
info.set_air_density(1.2)
info.set_water_density(0)
info.set_water_offset(0)
info.set_water_normal(LVector3(0, 0, 0))
## Softbody - From points/indices
#import cube
#points = [LPoint3(x,y,z) * 3 for x,y,z in cube.nodes]
#indices = sum([list(x) for x in cube.elements], [])
#node = BulletSoftBodyNode.make_tet_mesh(info, points, indices, True)
#node.set_volume_mass(300);
#node.get_shape(0).set_margin(0.01)
#node.get_material(0).set_linear_stiffness(0.8)
#node.get_cfg().set_positions_solver_iterations(1)
#node.get_cfg().clear_all_collision_flags()
#node.get_cfg().set_collision_flag(
#BulletSoftBodyConfig.CF_cluster_soft_soft, True)
#node.get_cfg().set_collision_flag(
#BulletSoftBodyConfig.CF_cluster_rigid_soft, True)
#node.generate_clusters(16)
#softNP = self.worldNP.attach_new_node(node)
#softNP.set_pos(0, 0, 8)
#softNP.set_hpr(0, 0, 45)
#self.world.attach(node)
# Softbody - From tetgen data
ele = open('models/cube/cube.1.ele', 'r').read()
face = open('models/cube/cube.1.face', 'r').read()
node = open('models/cube/cube.1.node', 'r').read()
node = BulletSoftBodyNode.make_tet_mesh(info, ele, face, node)
node.set_name('Tetra')
node.set_volume_mass(300)
node.get_shape(0).set_margin(0.01)
node.get_material(0).set_linear_stiffness(0.1)
node.get_cfg().set_positions_solver_iterations(1)
node.get_cfg().clear_all_collision_flags()
node.get_cfg().set_collision_flag(
BulletSoftBodyConfig.CF_cluster_soft_soft, True)
node.get_cfg().setCollisionFlag(
BulletSoftBodyConfig.CF_cluster_rigid_soft, True)
node.generate_clusters(6)
softNP = self.worldNP.attach_new_node(node)
softNP.set_pos(0, 0, 8)
softNP.set_hpr(45, 0, 0)
self.world.attach(node)
# Option 1:
visNP = loader.load_model('models/cube/cube.egg')
visNP.reparent_to(softNP)
geom = (visNP.findAllMatches('**/+GeomNode').getPath(
0).node().modifyGeom(0))
node.link_geom(geom)
