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/*
* Copyright 2017 Anton Khirnov <anton@khirnov.net>
*
* This program 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.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef TEUKOLSKY_DATA_CONSTRAINTS_H
#define TEUKOLSKY_DATA_CONSTRAINTS_H
#include "pssolve.h"
/**
* Identifies the specific initial data family to use.
*/
enum TDFamily {
/**
* The time-antisymmetric initial data used in Abrahams&Evans PhysRevD v49,n8 (1994).
* Conformally flat spatial metric.
* r / x x 3 \ / x 2 \
* K = -60√(2/π) a | --- - (---) | * exp| - (---) | sin(2θ)
* θ \ L L / \ L /
*/
TD_FAMILY_AE_TIME_ANTISYM = 0,
};
enum TDConstraintEq {
TD_CONSTRAINT_EQ_HAM = 0,
TD_CONSTRAINT_EQ_MOM_0,
TD_CONSTRAINT_EQ_MOM_1,
TD_CONSTRAINT_EQ_NB,
};
enum TDConstraintVar {
TD_CONSTRAINT_VAR_CONFFAC = 0,
TD_CONSTRAINT_VAR_CURV_RR,
TD_CONSTRAINT_VAR_CURV_PHIPHI,
TD_CONSTRAINT_VAR_NB,
};
typedef struct TDConstraintEvalPriv TDConstraintEvalPriv;
typedef struct TDConstraintEvalContext {
/**
* Private data, not to be touched by the caller.
*/
TDConstraintEvalPriv *priv;
/**
* The logging context.
* Set by the caller before tdi_constraint_eval_init().
*/
TDLogger logger;
unsigned int nb_coords[2];
double *coords[2];
enum TDFamily family;
double amplitude;
double a_converge;
double a_diverge;
} TDConstraintEvalContext;
int tdi_constraint_eval_alloc(TDConstraintEvalContext **ctx, enum TDFamily family);
int tdi_constraint_eval_init (TDConstraintEvalContext *ctx);
void tdi_constraint_eval_free(TDConstraintEvalContext **ctx);
int tdi_constraint_eval(TDConstraintEvalContext *ctx, enum TDConstraintEq eq,
const double *vars[TD_CONSTRAINT_VAR_NB][PSSOLVE_DIFF_ORDER_NB],
double *out);
double tdi_constraint_eval_k_rtheta(TDConstraintEvalContext *ctx, double r, double theta);
#endif // TEUKOLSKY_DATA_CONSTRAINTS_H
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