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from math import pi
from pinocchio.utils import np, rotate, XYZQUATToViewerConfiguration, se3ToXYZQUAT
DENSITY = 1
def placement(x=0, y=0, z=0, rx=0, ry=0, rz=0):
m = se3.SE3.Identity()
m.translation = np.matrix([[float(i)] for i in [x, y, z]])
m.rotation *= rotate('x', rx)
m.rotation *= rotate('y', ry)
m.rotation *= rotate('z', rz)
return m
def color(body_number=1):
return [int(i) for i in '%03d' % int(bin(body_number % 8)[2:])] + [1]
class ModelWrapper(object):
def __init__(self, model, name=None, display=False):
self.visuals = [('universe', se3.SE3.Identity(), se3.SE3.Identity().translation)]
self.name = self.__class__.__name__ if name is None else name
self.model = model
self.display = display
self.add_joints()
def add_joints(self):
for joint in self.joints:
self.add_joint(**joint)
def add_joint(self, joint_name, joint_model=None, joint_placement=None, lever=None, shape="box",
dimensions=1, mass=None, body_color=1, parent=0):
if joint_model is None:
joint_model = se3.JointModelFreeFlyer()
elif isinstance(joint_model, str):
joint_model = se3.__dict__['JointModel' + joint_model]()
if joint_placement is None:
joint_placement = se3.SE3.Identity()
elif isinstance(joint_placement, dict):
joint_placement = placement(**joint_placement)
if lever is None:
lever = se3.SE3.Identity()
elif isinstance(lever, dict):
lever = placement(**lever)
joint_name, body_name = ('world/%s_%s_%s' % (self.name, joint_name, i) for i in ('joint', 'body'))
body_inertia = se3.Inertia.Random()
if shape == "box":
w, h, d = (float(i) for i in dimensions) if isinstance(dimensions, tuple) else [float(dimensions)] * 3
if mass is None:
mass = w * h * d * DENSITY
body_inertia = se3.Inertia.FromBox(mass, w, h, d)
if self.display:
self.display.viewer.gui.addBox(body_name, w, h, d, color(body_color))
elif shape == "cylinder":
r, h = dimensions
if mass is None:
mass = pi * r ** 2 * h * DENSITY
body_inertia = se3.Inertia.FromCylinder(mass, r, h)
if self.display:
self.display.viewer.gui.addCylinder(body_name, r, h, color(body_color))
elif shape == "sphere":
w, h, d = (float(i) for i in dimensions) if isinstance(dimensions, tuple) else [float(dimensions)] * 3
if mass is None:
mass = 4. / 3. * pi * w * h * d * DENSITY
body_inertia = se3.Inertia.FromEllipsoid(mass, w, h, d)
if self.display:
self.display.viewer.gui.addSphere(body_name, dimensions, color(body_color))
body_inertia.lever = lever.translation
self.model.addJointAndBody(parent, joint_model, joint_placement, body_inertia, joint_name, body_name)
self.visuals.append((body_name, joint_placement, lever))
self.data = self.model.createData()
if self.display:
self.place()
def place(self):
for i, (name, placement, lever) in enumerate(self.visuals):
if i == 0:
continue
self.display.place(name, self.data.oMi[i] * placement * lever)
self.display.viewer.gui.refresh()
class RobotDisplay(object):
def __init__(self, window_name="pinocchio"):
from gepetto import corbaserver
self.viewer = corbaserver.Client()
try:
window_id = self.viewer.gui.getWindowID(window_name)
except:
window_id = self.viewer.gui.createWindow(window_name)
self.viewer.gui.createSceneWithFloor("world")
self.viewer.gui.addSceneToWindow("world", window_id)
self.viewer.gui.setLightingMode('world', 'OFF')
self.viewer.gui.setVisibility('world/floor', "OFF")
self.viewer.gui.refresh()
def place(self, obj_name, m):
self.viewer.gui.applyConfiguration(obj_name, XYZQUATToViewerConfiguration(se3ToXYZQUAT(m)))
class SimplestWalker(ModelWrapper):
joints = [
{'joint_name': "pelvis",
'dimensions': (.1, .2, .1),
'mass': .5,
},
{'joint_name': "left_leg",
'joint_model': "RY",
'joint_placement': {'y': -.15},
'lever': {'z': -.45},
'shape': "cylinder",
'dimensions': (.1, .9),
'mass': 20,
'body_color': 2,
'parent': 1,
},
{'joint_name': "right_leg",
'joint_model': "RY",
'joint_placement': {'y': .15},
'lever': {'z': -.45},
'shape': "cylinder",
'dimensions': (.1, .9),
'mass': 20,
'body_color': 3,
'parent': 1,
},
]
SimplestWalker(model)