OpenRAVE Documentation

Source code for openravepy.examples.inversekinematicspick

#!/usr/bin/env python
# -*- coding: utf-8 -*-
# Copyright (C) 2012 Rosen Diankov <>
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# See the License for the specific language governing permissions and
# limitations under the License.
"""Creates an object whose transform is used to solve IK solutions for each robot manipulator.

.. examplepre-block:: inversekinematicspick


Will create a picker for each manipulator in each robot. Can change the scene with:

.. code-block:: bash --example inversekinematicspick --scene=data/pr2test1.env.xml

Can also change the inverse kinematics type to use by:

.. code-block:: bash --example inversekinematicspick --scene=data/katanatable.env.xml --iktype=translation3d

.. examplepost-block:: inversekinematicspick
from __future__ import with_statement # for python 2.5
__author__ = 'Rosen Diankov'

import threading
import time
import openravepy
from openravepy import databases
from openravepy import IkParameterizationType, IkParameterization, RaveCreateKinBody, raveLogInfo, raveLogWarn, IkFilterOptions
from numpy import array, zeros

[docs]def main(env,options): "Main example code." if options.iktype is not None: # cannot use .names due to python 2.5 (or is it boost version?) for value,type in IkParameterization.Type.values.iteritems(): if == options.iktype.lower(): iktype = type break else: iktype = IkParameterizationType.Transform6D env.Load(options.scene) with env: # load the Transform6D IK models ikmodels = [] for robot in env.GetRobots(): for manip in robot.GetManipulators(): print manip try: robot.SetActiveManipulator(manip) ikmodel = databases.inversekinematics.InverseKinematicsModel(robot, iktype=iktype) if not ikmodel.load(): ikmodel.autogenerate() if not ikmodel.has(): continue ikmodels.append(ikmodel) except Exception, e: print 'failed manip %s'%manip, e if len(ikmodels) == 0: raveLogWarn('no manipulators found that can be loaded with iktype %s'%str(iktype)) # create the pickers pickers = [] for ikmodel in ikmodels: raveLogInfo('creating picker for %s'%str(ikmodel.manip)) picker = RaveCreateKinBody(env,'') picker.InitFromBoxes(array([ [0.05,0,0,0.05,0.01,0.01], [0,0.05,0,0.01,0.05,0.01], [0,0,0.05,0.01,0.01,0.05] ]),True) for igeom,geom in enumerate(picker.GetLinks()[0].GetGeometries()): color = zeros(3) color[igeom] = 1 geom.SetDiffuseColor(color) picker.SetName(ikmodel.manip.GetName()) env.Add(picker,True) # have to disable since not part of collision picker.Enable(False) picker.SetTransform(ikmodel.manip.GetTransform()) pickers.append([picker,ikmodel.manip]) raveLogInfo('pickers loaded, try moving them') def PickerThread(env,pickers,iktype): """this function runs in a separate thread monitoring each of the pickers """ Tpickers = [None]*len(pickers) while True: if env.GetViewer() is None: break with env: for ipicker,(picker,manip) in enumerate(pickers): T=picker.GetTransform() if Tpickers[ipicker] is not None and sum(abs(Tpickers[ipicker]-T).flatten()) <= 1e-10: continue data = None if iktype == IkParameterizationType.Direction3D: data = T[0:3,2] elif iktype == IkParameterizationType.Lookat3D: data = T[0:3,3] elif iktype == IkParameterizationType.Ray4D: data = Ray(T[0:3,3],T[0:3,2]) elif iktype == IkParameterizationType.Rotation3D: data = T[0:3,0:3] elif iktype == IkParameterizationType.Transform6D: data = T elif iktype == IkParameterizationType.Translation3D: data = T[0:3,3] elif iktype == IkParameterizationType.TranslationDirection5D: ikparam = Ray(T[0:3,3],T[0:3,2]) elif iktype == IkParameterizationType.TranslationLocalGlobal6D: ikparam = [T[0:3,3],zeros(3)] else: raveLogWarn('iktype %s unsupported'%str(iktype)) continue sol = manip.FindIKSolution(IkParameterization(data,iktype),IkFilterOptions.CheckEnvCollisions) if sol is not None: robot.SetDOFValues(sol,manip.GetArmIndices()) # have to update all other pickers since two manipulators can be connected to the same joints (torso) for ipicker2, (picker2,manip2) in enumerate(pickers): Tpickers[ipicker2] = manip2.GetTransform() picker2.SetTransform(manip2.GetTransform()) # changing color produces bugs with qtcoin # for igeom,geom in enumerate(picker.GetLinks()[0].GetGeometries()): # color = zeros(3) # color[igeom] = 0.4 if sol is None else 1.0 # geom.SetDiffuseColor(color) Tpickers[ipicker] = T # update rate of 0.05s time.sleep(0.05) # create the thread t = threading.Thread(target=PickerThread,args=[env,pickers,iktype]) t.start() while True: t.join(1)
from optparse import OptionParser from openravepy.misc import OpenRAVEGlobalArguments @openravepy.with_destroy
[docs]def run(args=None): """Command-line execution of the example. :param args: arguments for script to parse, if not specified will use sys.argv """ parser = OptionParser(description='Shows how to generate a 6D inverse kinematics solver and use it for getting all solutions.') OpenRAVEGlobalArguments.addOptions(parser) parser.add_option('--scene',action="store",type='string',dest='scene',default='data/lab1.env.xml', help='Scene file to load (default=%default)') parser.add_option('--iktype', action='store',type='string',dest='iktype',default=None, help='The ik type to build the solver current types are: %s'%(', '.join( for iktype in IkParameterization.Type.values.values()))) (options, leftargs) = parser.parse_args(args=args) OpenRAVEGlobalArguments.parseAndCreateThreadedUser(options,main,defaultviewer=True)
if __name__ == "__main__": run()


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