def create_multi_body(mass, collision_shapes, is_floating, world):
urdf = pd.TinyUrdfStructures()
base_link = pd.TinyUrdfLink()
base_link.link_name = "plane_link"
inertial = pd.TinyUrdfInertial()
inertial.mass = mass
inertial.inertia_xxyyzz = pd.TinyVector3(mass, mass, mass)
base_link.urdf_inertial = inertial
base_link.urdf_collision_shapes = collision_shapes
urdf.base_links = [base_link]
mb = pd.TinyMultiBody(is_floating)
urdf2mb = pd.UrdfToMultiBody2()
res = urdf2mb.convert2(urdf, world, mb)
return mb
def create_multi_body(link_name, mass, collision_shapes, visual_shapes, is_floating, mc, world): urdf = pd.TinyUrdfStructures() base_link = pd.TinyUrdfLink() base_link.link_name = link_name inertial = pd.TinyUrdfInertial() inertial.mass = mass inertial.inertia_xxyyzz = pd.TinyVector3(mass,mass,mass) base_link.urdf_inertial = inertial base_link.urdf_collision_shapes = collision_shapes base_link.urdf_visual_shapes = visual_shapes urdf.base_links = [base_link] mb = pd.TinyMultiBody(is_floating) urdf2mb = pd.UrdfToMultiBody2() res = urdf2mb.convert2(urdf, world, mb) b2vis = meshcat_utils_dp.convert_visuals(urdf, None, vis) return mb, b2vis
import pytinydiffsim as dp
#import meshcat_utils_dp
#import meshcat
import time
import copy
world = dp.TinyWorld()
mb_solver = dp.TinyMultiBodyConstraintSolver()
#vis = meshcat.Visualizer(zmq_url='tcp://127.0.0.1:6000')
#vis.delete()
urdf_parser = dp.TinyUrdfParser()
plane_urdf_data = urdf_parser.load_urdf("../../data/bunny.urdf")
#plane2vis = meshcat_utils_dp.convert_visuals(plane_urdf_data, "../../data/checker_purple.png", vis, "../../data/")
plane_mb = dp.TinyMultiBody(False)
plane2mb = dp.UrdfToMultiBody2()
res = plane2mb.convert2(plane_urdf_data, world, plane_mb)
colliders = plane_urdf_data.base_links[0].urdf_collision_shapes
print("num_colliders=", len(colliders))
ray_from = []
ray_to = []
ray_from.append(dp.TinyVector3(-2, .1, 0))
ray_to.append(dp.TinyVector3(2, .1, 0))
caster = dp.TinyRaycast()
colliders = []
if 1:
collision_shape = dp.TinyUrdfCollision()
p0.setAdditionalSearchPath(pd.getDataPath())
flags = p0.URDF_MAINTAIN_LINK_ORDER
plane = p0.loadURDF("plane_implicit.urdf", flags=flags)
med1 = urdf_utils_pb.UrdfConverterPyBullet()
med1.initializeFromBulletBody(plane, p0._client)
med1.convert_urdf_structures()
texture_path = os.path.join(pd.getDataPath(), "checker_blue.png")
print("texture_path=", texture_path)
plane_vis = meshcat_utils_dp.convert_visuals(med1.urdf_structs, texture_path,
vis)
urdf2mb = dp.UrdfToMultiBody2()
is_floating = False
plane_mb = dp.TinyMultiBody(is_floating)
multi_bodies = [plane_mb]
res = urdf2mb.convert2(med1.urdf_structs, world, plane_mb)
start_pos = [0, 0, 1.6]
#laikago = p0.loadURDF("laikago/laikago_toes_zup_one_leg.urdf", start_pos, flags=flags)
laikago = p0.loadURDF("sphere8cube.urdf", start_pos, flags=flags)
#laikago = p0.loadURDF("sphere2.urdf", start_pos, flags=flags)
#laikago = p0.loadURDF("laikago/laikago_toes_zup.urdf", start_pos, flags=flags)
#laikago = p0.loadURDF("r2d2.urdf", start_pos, flags=flags)
p0.configureDebugVisualizer(p0.COV_ENABLE_RENDERING, 1)
med0 = urdf_utils_pb.UrdfConverterPyBullet()
world = dp.TinyWorld()
world.friction = 1.0
motor_model = LaikagoMotorModel(kp=[220]*12, kd=[2]*12)
mb_solver = dp.TinyMultiBodyConstraintSolver()
vis = meshcat.Visualizer(zmq_url='tcp://127.0.0.1:6000')
vis.delete()
urdf_parser = dp.TinyUrdfParser()
plane_urdf_data = urdf_parser.load_urdf("../../data/plane_implicit.urdf")
plane2vis = meshcat_utils_dp.convert_visuals(plane_urdf_data, "../../data/checker_purple.png", vis, "../../data/")
plane_mb = dp.TinyMultiBody(False)
plane2mb = dp.UrdfToMultiBody2()
res = plane2mb.convert2(plane_urdf_data, world, plane_mb)
urdf_data = urdf_parser.load_urdf("../../data/laikago/laikago_toes_zup.urdf")
print("robot_name=",urdf_data.robot_name)
b2vis = meshcat_utils_dp.convert_visuals(urdf_data, "../../data/laikago/laikago_tex.jpg", vis, "../../data/laikago/")
is_floating=True
mb = dp.TinyMultiBody(is_floating)
urdf2mb = dp.UrdfToMultiBody2()
res = urdf2mb.convert2(urdf_data, world, mb)
mb.set_base_position(dp.Vector3(0,0,0.6))
mb.set_base_orientation(dp.Quaternion(0.0, 0.0, 0.706825181105366, 0.7073882691671998))
knee_angle = -0.5
def __init__(self, simulation_time_step):
self.MPC_BODY_MASS = MPC_BODY_MASS
self.MPC_BODY_INERTIA = MPC_BODY_INERTIA
self.MPC_BODY_HEIGHT = MPC_BODY_HEIGHT
self.time_step = simulation_time_step
self.num_legs = NUM_LEGS
self.num_motors = NUM_MOTORS
self.skip_sync = 0
self.world = dp.TinyWorld()
self.world.friction = 10.0
self.mb_solver = dp.TinyMultiBodyConstraintSolver()
self.vis = meshcat.Visualizer(zmq_url='tcp://127.0.0.1:6000')
self.vis.delete()
urdf_parser = dp.TinyUrdfParser()
plane_urdf_data = urdf_parser.load_urdf(
"../../../data/plane_implicit.urdf")
plane2vis = meshcat_utils_dp.convert_visuals(
plane_urdf_data, "../../../data/checker_purple.png", self.vis,
"../../../data/")
self.plane_mb = dp.TinyMultiBody(False)
plane2mb = dp.UrdfToMultiBody2()
res = plane2mb.convert2(plane_urdf_data, self.world, self.plane_mb)
self.urdf_data = urdf_parser.load_urdf(
"../../../data/laikago/laikago_toes_zup_joint_order.urdf")
print("robot_name=", self.urdf_data.robot_name)
self.b2vis = meshcat_utils_dp.convert_visuals(
self.urdf_data, "../../../data/laikago/laikago_tex.jpg", self.vis,
"../../../data/laikago/")
is_floating = True
self.mb = dp.TinyMultiBody(is_floating)
urdf2mb = dp.UrdfToMultiBody2()
self.res = urdf2mb.convert2(self.urdf_data, self.world, self.mb)
self.mb.set_base_position(dp.Vector3(0, 0, 0.6))
knee_angle = -0.5
abduction_angle = 0.2
self.initial_poses = [
abduction_angle, 0., knee_angle, abduction_angle, 0., knee_angle,
abduction_angle, 0., knee_angle, abduction_angle, 0., knee_angle
]
qcopy = self.mb.q
print("mb.q=", self.mb.q)
print("qcopy=", qcopy)
for q_index in range(12):
qcopy[q_index + 7] = self.initial_poses[q_index]
print("qcopy=", qcopy)
self.mb.set_q(qcopy)
print("2 mb.q=", self.mb.q)
print("self.mb.links=", self.mb.links)
print("TDS:")
for i in range(len(self.mb.links)):
print("i=", i)
l = self.mb.links[i]
#print("l.link_name=", l.link_name)
print("l.joint_name=", l.joint_name)
dp.forward_kinematics(self.mb, self.mb.q, self.mb.qd)
self._BuildJointNameToIdDict()
self._BuildUrdfIds()
self._BuildMotorIdList()
self.ResetPose()
self._motor_enabled_list = [True] * self.num_motors
self._step_counter = 0
self._state_action_counter = 0
self._motor_offset = np.array([0.] * 12)
self._motor_direction = np.array([1.] * 12)
self.ReceiveObservation()
self._kp = self.GetMotorPositionGains()
self._kd = self.GetMotorVelocityGains()
self._motor_model = LaikagoMotorModel(
kp=self._kp, kd=self._kd, motor_control_mode=MOTOR_CONTROL_HYBRID)
self.ReceiveObservation()
self.mb.set_base_position(
dp.Vector3(START_POS[0], START_POS[1], START_POS[2]))
self.mb.set_base_orientation(
dp.Quaternion(START_ORN[0], START_ORN[1], START_ORN[2],
START_ORN[3]))
dp.forward_kinematics(self.mb, self.mb.q, self.mb.qd)
meshcat_utils_dp.sync_visual_transforms(self.mb, self.b2vis, self.vis)
self._SettleDownForReset(reset_time=1.0)