gravshort.h File Reference

#include "partmanager.h"
#include "treewalk.h"
#include "gravity.h"

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Classes
struct	TreeWalkNgbIterGravShort
struct	TreeWalkQueryGravShort
struct	TreeWalkResultGravShort
struct	GravShortPriv

Macros
#define	GRAV_GET_PRIV(tw)   ((struct GravShortPriv *) ((tw)->priv))

Functions
static void	grav_short_postprocess (int i, TreeWalk *tw)
static void	grav_short_copy (int place, TreeWalkQueryGravShort *input, TreeWalk *tw)
static void	grav_short_reduce (int place, TreeWalkResultGravShort *result, enum TreeWalkReduceMode mode, TreeWalk *tw)

Macro Definition Documentation

GRAV_GET_PRIV

#define GRAV_GET_PRIV

(

tw

)

((struct GravShortPriv *) ((tw)->priv))

Definition at line 55 of file gravshort.h.

Function Documentation

grav_short_copy()

static void grav_short_copy ( int  place, TreeWalkQueryGravShort *  input, TreeWalk *  tw  )

static

Definition at line 74 of file gravshort.h.

{
    input->Soft = FORCE_SOFTENING(place, P[place].Type);
    /*Compute old acceleration before we over-write things*/
    double aold=0;
    int i;
    for(i = 0; i < 3; i++) {
       double ax = P[place].GravAccel[i] + P[place].GravPM[i];
       aold += ax*ax;
    }
 
    input->OldAcc = sqrt(aold)/GRAV_GET_PRIV(tw)->G;
 
}

References FORCE_SOFTENING(), GRAV_GET_PRIV, TreeWalkQueryGravShort::OldAcc, P, and TreeWalkQueryGravShort::Soft.

Referenced by grav_short_pair(), and grav_short_tree().

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grav_short_postprocess()

static void grav_short_postprocess ( int  i, TreeWalk *  tw  )

static

Definition at line 58 of file gravshort.h.

{
    double G = GRAV_GET_PRIV(tw)->G;
    P[i].GravAccel[0] *= G;
    P[i].GravAccel[1] *= G;
    P[i].GravAccel[2] *= G;
    /* calculate the potential */
    /* remove self-potential */
    P[i].Potential += P[i].Mass / (FORCE_SOFTENING(i, P[i].Type) / 2.8);
 
    P[i].Potential -= 2.8372975 * pow(P[i].Mass, 2.0 / 3) * GRAV_GET_PRIV(tw)->cbrtrho0;
 
    P[i].Potential *= G;
}

References FORCE_SOFTENING(), G, GRAV_GET_PRIV, and P.

Referenced by grav_short_pair(), and grav_short_tree().

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grav_short_reduce()

static void grav_short_reduce ( int  place, TreeWalkResultGravShort *  result, enum TreeWalkReduceMode  mode, TreeWalk *  tw  )

static

Definition at line 89 of file gravshort.h.

{
    int k;
    for(k = 0; k < 3; k++)
        TREEWALK_REDUCE(P[place].GravAccel[k], result->Acc[k]);
 
    TREEWALK_REDUCE(P[place].Potential, result->Potential);
}

References TreeWalkResultGravShort::Acc, P, TreeWalkResultGravShort::Potential, and TREEWALK_REDUCE.

Referenced by grav_short_pair(), and grav_short_tree().

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