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/**
* @file gravity.h
* @brief Default gravity modules.
* @author Hanno Rein <hanno@hanno-rein.de>
*
* @section LICENSE
* Copyright (c) 2011 Hanno Rein, Shangfei Liu
*
* This file is part of rebound.
*
* rebound is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* rebound is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with rebound. If not, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef _GRAVITY_H
#define _GRAVITY_H
struct reb_simulation;
// Basic O(N^2) gravity routine
void reb_gravity_basic_calculate_acceleration(struct reb_simulation* r);
// Tree based gravity routine
void reb_gravity_tree_calculate_acceleration(struct reb_simulation* r);
// O(N^2) gravity routine with compensated summation
void reb_gravity_compensated_calculate_acceleration(struct reb_simulation* r);
// Gravity routine for WH-style integrators in Jacobi coordinates
void reb_gravity_jacobi_calculate_acceleration(struct reb_simulation* r);
// Calculates the acceleration for the variational equations.
void reb_gravity_basic_calculate_acceleration_var(struct reb_simulation* r);
// Calculates the jerk (derivative of the acceleration) and applies it to the particles' velocity.
void reb_gravity_basic_calculate_and_apply_jerk(struct reb_simulation* r, const double v);
#endif