OpenRAVE Documentation

Source code for openravepy.examples.collision

#!/usr/bin/env python
# -*- coding: utf-8 -*-
# Copyright (C) 2009-2011 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.
"""Check collision calls, use collision reports, and do distance queries.

.. examplepre-block:: collision
  :image-width: 300

.. examplepost-block:: collision
from __future__ import with_statement # for python 2.5
__author__ = 'Rosen Diankov'
__copyright__ = '2009-2010 Rosen Diankov ('
__license__ = 'Apache License, Version 2.0'

import time
import openravepy
if not __openravepy_build_doc__:
    from numpy import *
    from openravepy import *

[docs]def collisioncallback(report,fromphysics): """Whenever a collision or physics detects a collision, this function is called""" s = 'collision callback with ' if report.plink1 is not None: s += '%s:%s '%(report.plink1.GetParent().GetName(),report.plink1.GetName()) else: s += '(NONE)' s += ' x ' if report.plink2 is not None: s += ' %s:%s'%(report.plink2.GetParent().GetName(),report.plink2.GetName()) else: s += '(NONE)' print s print 'from physics: ',fromphysics return CollisionAction.DefaultAction
[docs]def main(env,options): """Main example code. """ env.Load('robots/barrettwam.robot.xml') # register an optional collision callback handle = env.RegisterCollisionCallback(collisioncallback) robot1 = env.GetRobots()[0] try: # when doing fast ray collision checking, can specify multiple rays where each column is one ray ray1 = array((0,0,-10,0,0,100)) # specify dir*range, pos ray2 = array((0,0,10,0,0,-100)) # specify dir*range, pos inliers,hitpoints = env.CheckCollisionRays(r_[[ray1],[ray2]],robot1) print 'rays hit:',inliers,'hit points:',hitpoints # can get more fine grained information report1 = CollisionReport() inlier1 = env.CheckCollision(Ray(ray1[0:3],ray1[3:6])) inlier1 = env.CheckCollision(Ray(ray1[0:3],ray1[3:6]),report1) print 'numcontacts: ',len(report1.contacts),' pos: ', report1.contacts[0].pos,' norm: ',report1.contacts[0].norm except openrave_exception,e: print e robot2 = env.ReadRobotXMLFile('robots/mitsubishi-pa10.zae') env.Add(robot2) body1 = env.ReadKinBodyXMLFile('data/mug1.kinbody.xml') env.Add(body1) env.CheckCollision(robot1,robot2) env.CheckCollision(robot1,body1) env.CheckCollision(robot2,body1) print 'checking self collision' robot1.SetDOFValues([2.98],[3]) if not robot1.CheckSelfCollision(): print 'no collision detected (bad)!!, ',env.CheckCollision(robot1.GetLinks()[1],robot1.GetLinks()[13]) handle.close() # test distance queries T = eye(4) T[0,3] = 0.5 robot1.SetTransform(T) T = eye(4) T[1,3] = 0.5 body1.SetTransform(T) print 'move the robots to update the closest distance' if not env.GetCollisionChecker().SetCollisionOptions(CollisionOptions.Distance|CollisionOptions.Contacts): print 'current checker does not support distance, switching to pqp...' collisionChecker = RaveCreateCollisionChecker(env,'pqp') collisionChecker.SetCollisionOptions(CollisionOptions.Distance|CollisionOptions.Contacts) env.SetCollisionChecker(collisionChecker) report = CollisionReport() while True: contacts = [] with env: check = env.CheckCollision(robot1, report) print 'mindist: ',report.minDistance contacts += report.contacts check = env.CheckCollision(robot2, report) print 'mindist: ',report.minDistance contacts += report.contacts check = env.CheckCollision(body1, report) print 'mindist: ',report.minDistance contacts += report.contacts handles = [env.drawlinestrip(points=array((c.pos,c.pos-c.depth*c.norm)), linewidth=3.0, colors=array((1,0,0,1))) for c in contacts] time.sleep(0.1)
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='Example shows how to query collision detection information using openravepy') OpenRAVEGlobalArguments.addOptions(parser) (options, leftargs) = parser.parse_args(args=args) OpenRAVEGlobalArguments.parseAndCreateThreadedUser(options,main,defaultviewer=True)
if __name__ == "__main__": run()


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