Program Listing for File chomp_utils.h
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/* Author: Mrinal Kalakrishnan */
#pragma once
#include <moveit/planning_scene/planning_scene.h>
#include <Eigen/Core>
#include <iostream>
namespace chomp
{
static const int DIFF_RULE_LENGTH = 7;
// the differentiation rules (centered at the center)
static const double DIFF_RULES[3][DIFF_RULE_LENGTH] = {
{ 0, 0, -2 / 6.0, -3 / 6.0, 6 / 6.0, -1 / 6.0, 0 }, // velocity
{ 0, -1 / 12.0, 16 / 12.0, -30 / 12.0, 16 / 12.0, -1 / 12.0, 0 }, // acceleration
{ 0, 1 / 12.0, -17 / 12.0, 46 / 12.0, -46 / 12.0, 17 / 12.0, -1 / 12.0 } // jerk
};
static inline void robotStateToArray(const moveit::core::RobotState& state, const std::string& planning_group_name,
Eigen::MatrixXd::RowXpr joint_array)
{
const moveit::core::JointModelGroup* group = state.getJointModelGroup(planning_group_name);
size_t joint_index = 0;
for (const moveit::core::JointModel* jm : group->getActiveJointModels())
joint_array[joint_index++] = state.getVariablePosition(jm->getFirstVariableIndex());
}
// copied from geometry/angles/angles.h
static inline double normalizeAnglePositive(double angle)
{
return fmod(fmod(angle, 2.0 * M_PI) + 2.0 * M_PI, 2.0 * M_PI);
}
static inline double normalizeAngle(double angle)
{
double a = normalizeAnglePositive(angle);
if (a > M_PI)
a -= 2.0 * M_PI;
return a;
}
static inline double shortestAngularDistance(double start, double end)
{
double res = normalizeAnglePositive(normalizeAnglePositive(end) - normalizeAnglePositive(start));
if (res > M_PI)
{
res = -(2.0 * M_PI - res);
}
return normalizeAngle(res);
}
} // namespace chomp