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ppovb5fc7/gazebo/test/integration/joint_force_torque.cc

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/*
* Copyright (C) 2012 Open Source Robotics Foundation
*
* 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
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#include <gtest/gtest.h>
#include "gazebo/physics/physics.hh"
#include "gazebo/physics/Joint.hh"
#include "gazebo/test/ServerFixture.hh"
#include "gazebo/test/helper_physics_generator.hh"
#define TOL 1e-6
#define TOL_CONT 2.0
using namespace gazebo;
class JointForceTorqueTest : public ServerFixture,
public testing::WithParamInterface<const char*>
{
/// \brief Load example world with a few joints
/// Measure / verify static force torques against analytical answers.
/// \param[in] _physicsEngine Type of physics engine to use.
public: void ForceTorque1(const std::string &_physicsEngine);
/// \brief Load example world with a few joints
/// Measure / verify static force torques against analytical answers.
/// Change gravity to tip over the joints.
/// Wait until joint stops are hit and joint motion settles,
/// then check force torques values against analytical values.
/// \param[in] _physicsEngine Type of physics engine to use.
public: void ForceTorque2(const std::string &_physicsEngine);
/// \brief Load example world with a few joints.
/// Servo the joints to a fixed target position using simple PID controller.
/// Measure / verify static force torques against analytical answers.
/// \param[in] _physicsEngine Type of physics engine to use.
public: void GetForceTorqueWithAppliedForce(
const std::string &_physicsEngine);
/// \brief Load example world with a few joints.
/// Servo the joints to a fixed target position using simple PID controller.
/// Measure / verify static force torques against analytical answers.
/// Reset world and measure the force torques again.
/// \param[in] _physicsEngine Type of physics engine to use.
public: void GetForceTorqueWithAppliedForceReset(
const std::string &_physicsEngine);
/// \brief Create a hinge joint between link and world.
/// Apply force and check acceleration against analytical solution.
/// \param[in] _physicsEngine Type of physics engine to use.
public: void JointTorqueTest(const std::string &_physicsEngine);
};
/////////////////////////////////////////////////
void JointForceTorqueTest::ForceTorque1(const std::string &_physicsEngine)
{
// Load our force torque test world
Load("worlds/force_torque_test.world", true, _physicsEngine);
// Get a pointer to the world, make sure world loads
physics::WorldPtr world = physics::get_world("default");
ASSERT_TRUE(world != NULL);
// Verify physics engine type
physics::PhysicsEnginePtr physics = world->GetPhysicsEngine();
ASSERT_TRUE(physics != NULL);
EXPECT_EQ(physics->GetType(), _physicsEngine);
physics->SetGravity(math::Vector3(0, 0, -50));
// simulate 1 step
world->Step(1);
double t = world->GetSimTime().Double();
// get time step size
double dt = world->GetPhysicsEngine()->GetMaxStepSize();
EXPECT_GT(dt, 0);
gzlog << "dt : " << dt << "\n";
// verify that time moves forward
EXPECT_DOUBLE_EQ(t, dt);
gzlog << "t after one step : " << t << "\n";
// get joint and get force torque
physics::ModelPtr model_1 = world->GetModel("model_1");
physics::LinkPtr link_1 = model_1->GetLink("link_1");
physics::LinkPtr link_2 = model_1->GetLink("link_2");
physics::JointPtr joint_01 = model_1->GetJoint("joint_01");
physics::JointPtr joint_12 = model_1->GetJoint("joint_12");
gzlog << "-------------------Test 1-------------------\n";
for (unsigned int i = 0; i < 10; ++i)
{
world->Step(1);
// test joint_01 wrench
physics::JointWrench wrench_01 = joint_01->GetForceTorque(0u);
EXPECT_DOUBLE_EQ(wrench_01.body1Force.x, 0.0);
EXPECT_DOUBLE_EQ(wrench_01.body1Force.y, 0.0);
EXPECT_FLOAT_EQ(wrench_01.body1Force.z, 1000.0);
EXPECT_DOUBLE_EQ(wrench_01.body1Torque.x, 0.0);
EXPECT_DOUBLE_EQ(wrench_01.body1Torque.y, 0.0);
EXPECT_DOUBLE_EQ(wrench_01.body1Torque.z, 0.0);
EXPECT_DOUBLE_EQ(wrench_01.body2Force.x, -wrench_01.body1Force.x);
EXPECT_DOUBLE_EQ(wrench_01.body2Force.y, -wrench_01.body1Force.y);
EXPECT_DOUBLE_EQ(wrench_01.body2Force.z, -wrench_01.body1Force.z);
EXPECT_DOUBLE_EQ(wrench_01.body2Torque.x, -wrench_01.body1Torque.x);
EXPECT_DOUBLE_EQ(wrench_01.body2Torque.y, -wrench_01.body1Torque.y);
EXPECT_DOUBLE_EQ(wrench_01.body2Torque.z, -wrench_01.body1Torque.z);
gzlog << "link_1 pose [" << link_1->GetWorldPose()
<< "] velocity [" << link_1->GetWorldLinearVel()
<< "]\n";
gzlog << "link_2 pose [" << link_2->GetWorldPose()
<< "] velocity [" << link_2->GetWorldLinearVel()
<< "]\n";
gzlog << "joint_01 force torque : "
<< "force1 [" << wrench_01.body1Force
<< " / 0 0 1000"
<< "] torque1 [" << wrench_01.body1Torque
<< " / 0 0 0"
<< "] force2 [" << wrench_01.body2Force
<< " / 0 0 -1000"
<< "] torque2 [" << wrench_01.body2Torque
<< " / 0 0 0"
<< "]\n";
// test joint_12 wrench
physics::JointWrench wrench_12 = joint_12->GetForceTorque(0u);
EXPECT_DOUBLE_EQ(wrench_12.body1Force.x, 0.0);
EXPECT_DOUBLE_EQ(wrench_12.body1Force.y, 0.0);
EXPECT_FLOAT_EQ(wrench_12.body1Force.z, 500.0);
EXPECT_DOUBLE_EQ(wrench_12.body1Torque.x, 0.0);
EXPECT_DOUBLE_EQ(wrench_12.body1Torque.y, 0.0);
EXPECT_DOUBLE_EQ(wrench_12.body1Torque.z, 0.0);
EXPECT_DOUBLE_EQ(wrench_12.body2Force.x, -wrench_12.body1Force.x);
EXPECT_DOUBLE_EQ(wrench_12.body2Force.y, -wrench_12.body1Force.y);
EXPECT_DOUBLE_EQ(wrench_12.body2Force.z, -wrench_12.body1Force.z);
EXPECT_DOUBLE_EQ(wrench_12.body2Torque.x, -wrench_12.body1Torque.x);
EXPECT_DOUBLE_EQ(wrench_12.body2Torque.y, -wrench_12.body1Torque.y);
EXPECT_DOUBLE_EQ(wrench_12.body2Torque.z, -wrench_12.body1Torque.z);
gzlog << "link_1 pose [" << link_1->GetWorldPose()
<< "] velocity [" << link_1->GetWorldLinearVel()
<< "]\n";
gzlog << "link_2 pose [" << link_2->GetWorldPose()
<< "] velocity [" << link_2->GetWorldLinearVel()
<< "]\n";
gzlog << "joint_12 force torque : "
<< "force1 [" << wrench_12.body1Force
<< " / 0 0 500"
<< "] torque1 [" << wrench_12.body1Torque
<< " / 0 0 0"
<< "] force2 [" << wrench_12.body2Force
<< " / 0 0 -500"
<< "] torque2 [" << wrench_12.body2Torque
<< " / 0 0 0"
<< "]\n";
}
}
/////////////////////////////////////////////////
void JointForceTorqueTest::ForceTorque2(const std::string &_physicsEngine)
{
// Load our force torque test world
Load("worlds/force_torque_test.world", true, _physicsEngine);
// Get a pointer to the world, make sure world loads
physics::WorldPtr world = physics::get_world("default");
ASSERT_TRUE(world != NULL);
// Verify physics engine type
physics::PhysicsEnginePtr physics = world->GetPhysicsEngine();
ASSERT_TRUE(physics != NULL);
EXPECT_EQ(physics->GetType(), _physicsEngine);
physics->SetGravity(math::Vector3(0, 0, -50));
// simulate 1 step
world->Step(1);
double t = world->GetSimTime().Double();
// get time step size
double dt = world->GetPhysicsEngine()->GetMaxStepSize();
EXPECT_GT(dt, 0);
gzlog << "dt : " << dt << "\n";
// verify that time moves forward
EXPECT_DOUBLE_EQ(t, dt);
gzlog << "t after one step : " << t << "\n";
// get joint and get force torque
physics::ModelPtr model_1 = world->GetModel("model_1");
physics::LinkPtr link_1 = model_1->GetLink("link_1");
physics::LinkPtr link_2 = model_1->GetLink("link_2");
physics::JointPtr joint_01 = model_1->GetJoint("joint_01");
physics::JointPtr joint_12 = model_1->GetJoint("joint_12");
// perturbe joints so top link topples over, then remeasure
physics->SetGravity(math::Vector3(-30, 10, -50));
// tune joint stop properties
joint_01->SetParam("stop_erp", 0, 0.02);
joint_12->SetParam("stop_erp", 0, 0.02);
// wait for dynamics to stabilize
world->Step(2000);
// check force torques in new system
gzlog << "\n-------------------Test 2-------------------\n";
for (unsigned int i = 0; i < 5; ++i)
{
world->Step(1);
// Dbg joint_01 force torque :
// force1 [600 -200 999.99999600000001 / 600 -1000 -200]
// torque1 [749.999819 82.840868 -450.00009699999998 / 750 450 0]
// force2 [-600 999.99976200000003 200.00117299999999 / -600 1000 200]
// torque2 [-749.999819 -450 -82.841396000000003 / -750 -450 0]
// Dbg joint_12 force torque :
// force1 [300 -499.99987900000002 -100.000587 / 300 -500 -100]
// torque1 [249.99994000000001 150 82.841396000000003 / 250 150 0]
// force2 [-300.000407 499.99963500000001 100.000587 / -300 500 100]
// torque2 [-249.999818 -150.000203 -82.841396000000003 / -250 -150 0]
// test joint_01 wrench
physics::JointWrench wrench_01 = joint_01->GetForceTorque(0u);
EXPECT_NEAR(wrench_01.body1Force.x, 600.0, 6.0);
EXPECT_NEAR(wrench_01.body1Force.y, -200.0, 10.0);
EXPECT_NEAR(wrench_01.body1Force.z, 1000.0, 2.0);
EXPECT_NEAR(wrench_01.body1Torque.x, 750.0, 7.5);
EXPECT_NEAR(wrench_01.body1Torque.y, 0.0, 4.5);
EXPECT_NEAR(wrench_01.body1Torque.z, -450.0, 0.1);
EXPECT_NEAR(wrench_01.body2Force.x, -600.0, 6.0);
EXPECT_NEAR(wrench_01.body2Force.y, 1000.0, 10.0);
if (_physicsEngine == "dart")
{
// DART needs greater tolerance due to joint limit violation
// Please see issue #902
EXPECT_NEAR(wrench_01.body2Force.z, 200.0, 8.6);
}
else
{
EXPECT_NEAR(wrench_01.body2Force.z, 200.0, 2.0);
}
EXPECT_NEAR(wrench_01.body2Torque.x, -750.0, 7.5);
EXPECT_NEAR(wrench_01.body2Torque.y, -450.0, 4.5);
EXPECT_NEAR(wrench_01.body2Torque.z, 0.0, 0.1);
gzlog << "joint_01 force torque : "
<< "force1 [" << wrench_01.body1Force
<< " / 600 -200 1000"
<< "] torque1 [" << wrench_01.body1Torque
<< " / 750 0 450"
<< "] force2 [" << wrench_01.body2Force
<< " / -600 1000 200"
<< "] torque2 [" << wrench_01.body2Torque
<< " / -750 -450 0"
<< "]\n";
gzlog << "joint angle1[" << std::setprecision(17) << joint_01->GetAngle(0)
<< "] angle2[" << joint_12->GetAngle(0) << "]\n";
// test joint_12 wrench
physics::JointWrench wrench_12 = joint_12->GetForceTorque(0u);
EXPECT_NEAR(wrench_12.body1Force.x, 300.0, 3.0);
EXPECT_NEAR(wrench_12.body1Force.y, -500.0, 5.0);
if (_physicsEngine == "dart")
{
// DART needs greater tolerance due to joint limit violation
// Please see issue #902
EXPECT_NEAR(wrench_12.body1Force.z, -100.0, 4.3);
}
else
{
EXPECT_NEAR(wrench_12.body1Force.z, -100.0, 1.0);
}
EXPECT_NEAR(wrench_12.body1Torque.x, 250.0, 5.0);
EXPECT_NEAR(wrench_12.body1Torque.y, 150.0, 3.0);
EXPECT_NEAR(wrench_12.body1Torque.z, 0.0, 0.1);
// A good check is that
// the computed body1Torque shoud in fact be opposite of body1Torque
EXPECT_NEAR(wrench_12.body2Force.x, -wrench_12.body1Force.x, 1e-1);
EXPECT_NEAR(wrench_12.body2Force.y, -wrench_12.body1Force.y, 1e-1);
EXPECT_NEAR(wrench_12.body2Force.z, -wrench_12.body1Force.z, 1e-1);
EXPECT_NEAR(wrench_12.body2Torque.x, -wrench_12.body1Torque.x, 1e-1);
EXPECT_NEAR(wrench_12.body2Torque.y, -wrench_12.body1Torque.y, 1e-1);
EXPECT_NEAR(wrench_12.body2Torque.z, -wrench_12.body1Torque.z, 1e-1);
gzlog << "joint_12 force torque : "
<< "force1 [" << wrench_12.body1Force
<< " / 300 -500 -100"
<< "] torque1 [" << wrench_12.body1Torque
<< " / 250 150 0"
<< "] force2 [" << wrench_12.body2Force
<< " / -300 500 100"
<< "] torque2 [" << wrench_12.body2Torque
<< " / -250 -150 0"
<< "]\n";
}
// simulate a few steps
int steps = 20;
world->Step(steps);
t = world->GetSimTime().Double();
EXPECT_GT(t, 0.99*dt*static_cast<double>(steps+1));
gzdbg << "t after 20 steps : " << t << "\n";
}
/////////////////////////////////////////////////
void JointForceTorqueTest::GetForceTorqueWithAppliedForce(
const std::string &_physicsEngine)
{
// Explicit joint damping in bullet is causing this test to fail.
if (_physicsEngine == "bullet")
{
gzerr << "Aborting test for bullet, see issue #619.\n";
return;
}
// Load our force torque test world
Load("worlds/force_torque_test2.world", true, _physicsEngine);
// Get a pointer to the world, make sure world loads
physics::WorldPtr world = physics::get_world("default");
ASSERT_TRUE(world != NULL);
// Verify physics engine type
physics::PhysicsEnginePtr physics = world->GetPhysicsEngine();
ASSERT_TRUE(physics != NULL);
EXPECT_EQ(physics->GetType(), _physicsEngine);
physics->SetGravity(math::Vector3(0, 0, -50));
// simulate 1 step
world->Step(1);
double t = world->GetSimTime().Double();
// get time step size
double dt = world->GetPhysicsEngine()->GetMaxStepSize();
EXPECT_GT(dt, 0);
gzlog << "dt : " << dt << "\n";
// verify that time moves forward
EXPECT_GT(t, 0);
gzlog << "t after one step : " << t << "\n";
// get joint and get force torque
physics::ModelPtr model_1 = world->GetModel("boxes");
physics::JointPtr joint_01 = model_1->GetJoint("joint1");
physics::JointPtr joint_12 = model_1->GetJoint("joint2");
gzlog << "------------------- PD CONTROL -------------------\n";
static const double kp1 = 50000.0;
static const double kp2 = 10000.0;
static const double target1 = 0.0;
static const double target2 = -0.25*M_PI;
for (unsigned int i = 0; i < 3388; ++i)
{
// pd control
double j1State = joint_01->GetAngle(0u).Radian();
double j2State = joint_12->GetAngle(0u).Radian();
double p1Error = target1 - j1State;
double p2Error = target2 - j2State;
double effort1 = kp1 * p1Error;
double effort2 = kp2 * p2Error;
joint_01->SetForce(0u, effort1);
joint_12->SetForce(0u, effort2);
world->Step(1);
// test joint_01 wrench
physics::JointWrench wrench_01 = joint_01->GetForceTorque(0u);
if (i == 3387)
{
EXPECT_NEAR(wrench_01.body1Force.x, 0.0, TOL_CONT);
EXPECT_NEAR(wrench_01.body1Force.y, 0.0, TOL_CONT);
EXPECT_NEAR(wrench_01.body1Force.z, 300.0, TOL_CONT);
EXPECT_NEAR(wrench_01.body1Torque.x, 25.0, TOL_CONT);
EXPECT_NEAR(wrench_01.body1Torque.y, -175.0, TOL_CONT);
EXPECT_NEAR(wrench_01.body1Torque.z, 0.0, TOL_CONT);
EXPECT_NEAR(wrench_01.body2Force.x, -wrench_01.body1Force.x, TOL_CONT);
EXPECT_NEAR(wrench_01.body2Force.y, -wrench_01.body1Force.y, TOL_CONT);
EXPECT_NEAR(wrench_01.body2Force.z, -wrench_01.body1Force.z, TOL_CONT);
EXPECT_NEAR(wrench_01.body2Torque.x, -wrench_01.body1Torque.x, TOL_CONT);
EXPECT_NEAR(wrench_01.body2Torque.y, -wrench_01.body1Torque.y, TOL_CONT);
EXPECT_NEAR(wrench_01.body2Torque.z, -wrench_01.body1Torque.z, TOL_CONT);
gzlog << "joint_01 force torque : "
<< "step [" << i
<< "] GetForce [" << joint_01->GetForce(0u)
<< "] command [" << effort1
<< "] force1 [" << wrench_01.body1Force
<< "] torque1 [" << wrench_01.body1Torque
<< "] force2 [" << wrench_01.body2Force
<< "] torque2 [" << wrench_01.body2Torque
<< "]\n";
}
// test joint_12 wrench
physics::JointWrench wrench_12 = joint_12->GetForceTorque(0u);
if (i == 3387)
{
EXPECT_NEAR(wrench_12.body1Force.x, 0.0, TOL_CONT);
EXPECT_NEAR(wrench_12.body1Force.y, 0.0, TOL_CONT);
EXPECT_NEAR(wrench_12.body1Force.z, 50.0, TOL_CONT);
EXPECT_NEAR(wrench_12.body1Torque.x, 25.0, TOL_CONT);
EXPECT_NEAR(wrench_12.body1Torque.y, 0.0, TOL_CONT);
EXPECT_NEAR(wrench_12.body1Torque.z, 0.0, TOL_CONT);
EXPECT_NEAR(wrench_12.body2Force.x, -35.355, TOL_CONT);
EXPECT_NEAR(wrench_12.body2Force.y, 0.000, TOL_CONT);
EXPECT_NEAR(wrench_12.body2Force.z, -35.355, TOL_CONT);
EXPECT_NEAR(wrench_12.body2Torque.x, -17.678, TOL_CONT);
EXPECT_NEAR(wrench_12.body2Torque.y, 0.000, TOL_CONT);
EXPECT_NEAR(wrench_12.body2Torque.z, 17.678, TOL_CONT);
gzlog << "joint_12 force torque : "
<< "step [" << i
<< "] GetForce [" << joint_12->GetForce(0u)
<< "] command [" << effort2
<< "] force1 [" << wrench_12.body1Force
<< "] torque1 [" << wrench_12.body1Torque
<< "] force2 [" << wrench_12.body2Force
<< "] torque2 [" << wrench_12.body2Torque
<< "]\n";
}
gzlog << "angles[" << i << "] 1[" << joint_01->GetAngle(0)
<< "] 2[" << joint_12->GetAngle(0)
<< "]\n";
}
}
/////////////////////////////////////////////////
void JointForceTorqueTest::GetForceTorqueWithAppliedForceReset(
const std::string &_physicsEngine)
{
// Explicit joint damping in bullet is causing this test to fail.
if (_physicsEngine == "bullet")
{
gzerr << "Aborting test for bullet, see issue #619.\n";
return;
}
// Load our force torque test world
Load("worlds/force_torque_test2.world", true, _physicsEngine);
// Get a pointer to the world, make sure world loads
physics::WorldPtr world = physics::get_world("default");
ASSERT_TRUE(world != NULL);
// Verify physics engine type
physics::PhysicsEnginePtr physics = world->GetPhysicsEngine();
ASSERT_TRUE(physics != NULL);
EXPECT_EQ(physics->GetType(), _physicsEngine);
physics->SetGravity(math::Vector3(0, 0, -50));
// simulate 1 step
world->Step(1);
double t = world->GetSimTime().Double();
// get time step size
double dt = world->GetPhysicsEngine()->GetMaxStepSize();
EXPECT_GT(dt, 0);
gzlog << "dt : " << dt << "\n";
// verify that time moves forward
EXPECT_GT(t, 0);
gzlog << "t after one step : " << t << "\n";
// get joint and get force torque
physics::ModelPtr model_1 = world->GetModel("boxes");
physics::JointPtr joint_01 = model_1->GetJoint("joint1");
physics::JointPtr joint_12 = model_1->GetJoint("joint2");
gzlog << "------------------- PD CONTROL -------------------\n";
static const double kp1 = 50000.0;
static const double kp2 = 10000.0;
static const double target1 = 0.0;
static const double target2 = -0.25*M_PI;
for (unsigned int j = 0; j < 2; ++j)
{
for (unsigned int i = 0; i < 3388; ++i)
{
// pd control
double j1State = joint_01->GetAngle(0u).Radian();
double j2State = joint_12->GetAngle(0u).Radian();
double p1Error = target1 - j1State;
double p2Error = target2 - j2State;
double effort1 = kp1 * p1Error;
double effort2 = kp2 * p2Error;
joint_01->SetForce(0u, effort1);
joint_12->SetForce(0u, effort2);
world->Step(1);
// test joint_01 wrench
physics::JointWrench wrench_01 = joint_01->GetForceTorque(0u);
if (i < 3387)
continue;
EXPECT_NEAR(wrench_01.body1Force.x, 0.0, TOL_CONT);
EXPECT_NEAR(wrench_01.body1Force.y, 0.0, TOL_CONT);
EXPECT_NEAR(wrench_01.body1Force.z, 300.0, TOL_CONT);
EXPECT_NEAR(wrench_01.body1Torque.x, 25.0, TOL_CONT);
EXPECT_NEAR(wrench_01.body1Torque.y, -175.0, TOL_CONT);
EXPECT_NEAR(wrench_01.body1Torque.z, 0.0, TOL_CONT);
EXPECT_NEAR(wrench_01.body2Force.x, -wrench_01.body1Force.x, TOL_CONT);
EXPECT_NEAR(wrench_01.body2Force.y, -wrench_01.body1Force.y, TOL_CONT);
EXPECT_NEAR(wrench_01.body2Force.z, -wrench_01.body1Force.z, TOL_CONT);
EXPECT_NEAR(wrench_01.body2Torque.x, -wrench_01.body1Torque.x, TOL_CONT);
EXPECT_NEAR(wrench_01.body2Torque.y, -wrench_01.body1Torque.y, TOL_CONT);
EXPECT_NEAR(wrench_01.body2Torque.z, -wrench_01.body1Torque.z, TOL_CONT);
gzlog << "joint_01 force torque : "
<< "step [" << i
<< "] GetForce [" << joint_01->GetForce(0u)
<< "] command [" << effort1
<< "] force1 [" << wrench_01.body1Force
<< "] torque1 [" << wrench_01.body1Torque
<< "] force2 [" << wrench_01.body2Force
<< "] torque2 [" << wrench_01.body2Torque
<< "]\n";
}
world->Reset();
double simTime = world->GetSimTime().Double();
EXPECT_NEAR(simTime, 0.0, dt);
}
}
////////////////////////////////////////////////////////////////////////
// Create a joint between link and world
// Apply force and check acceleration for correctness
////////////////////////////////////////////////////////////////////////
void JointForceTorqueTest::JointTorqueTest(const std::string &_physicsEngine)
{
// Load our inertial test world
Load("worlds/joint_test.world", true, _physicsEngine);
// Get a pointer to the world, make sure world loads
physics::WorldPtr world = physics::get_world("default");
ASSERT_TRUE(world != NULL);
// Verify physics engine type
physics::PhysicsEnginePtr physics = world->GetPhysicsEngine();
ASSERT_TRUE(physics != NULL);
EXPECT_EQ(physics->GetType(), _physicsEngine);
{
// get model
physics::ModelPtr model = world->GetModel("model_1");
ASSERT_TRUE(model != NULL);
physics::LinkPtr link = model->GetLink("link_1");
ASSERT_TRUE(link != NULL);
physics::JointPtr joint = model->GetJoint("joint_01");
double lastV = 0;
double dt = world->GetPhysicsEngine()->GetMaxStepSize();
for (unsigned int i = 0; i < 10; ++i)
{
double torque = 1.3;
joint->SetForce(0, torque);
world->Step(1);
double curV = joint->GetVelocity(0);
double accel = (curV - lastV) / dt;
gzdbg << i << " : " << curV << " : " << (curV - lastV) / dt << "\n";
lastV = curV;
EXPECT_NEAR(accel, torque / link->GetInertial()->GetIXX(), TOL);
}
}
{
// get model
physics::ModelPtr model = world->GetModel("model_2");
ASSERT_TRUE(model != NULL);
physics::LinkPtr link = model->GetLink("link_1");
ASSERT_TRUE(link != NULL);
physics::JointPtr joint = model->GetJoint("joint_01");
double lastV = 0;
double dt = world->GetPhysicsEngine()->GetMaxStepSize();
for (unsigned int i = 0; i < 10; ++i)
{
double torque = 1.3;
joint->SetForce(0, torque);
world->Step(1);
double curV = joint->GetVelocity(0);
double accel = (curV - lastV) / dt;
gzdbg << i << " : " << curV << " : " << (curV - lastV) / dt << "\n";
lastV = curV;
EXPECT_NEAR(accel, torque / link->GetInertial()->GetIZZ(), TOL);
}
}
}
TEST_P(JointForceTorqueTest, ForceTorque1)
{
ForceTorque1(GetParam());
}
TEST_P(JointForceTorqueTest, ForceTorque2)
{
ForceTorque2(GetParam());
}
TEST_P(JointForceTorqueTest, GetForceTorqueWithAppliedForce)
{
GetForceTorqueWithAppliedForce(GetParam());
}
TEST_P(JointForceTorqueTest, GetForceTorqueWithAppliedForceReset)
{
GetForceTorqueWithAppliedForceReset(GetParam());
}
TEST_P(JointForceTorqueTest, JointTorqueTest)
{
JointTorqueTest(GetParam());
}
INSTANTIATE_TEST_CASE_P(PhysicsEngines, JointForceTorqueTest,
PHYSICS_ENGINE_VALUES);
int main(int argc, char **argv)
{
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}
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