Math constants and comparision tolerances. More...

Macros
#define	FLT_EPSILON 1.0E-12

#define	FLT_INFINITY 1.0E300

#define	REPORT_WIDTH 53

#define	DEFAULT_INIT_ID 1000000

#define	FOUR_PI 12.566370614359172

#define	ONE_OVER_FOUR_PI 0.07957747154594767

#define	ZERO_SIGMA_T 1E-6

#define	SIGMA_T_THRESH 1E-10

#define	TINY_MOVE 1E-8

#define	ON_LATTICE_CELL_THRESH 1E-12

#define	ON_SURFACE_THRESH 1E-12

#define	POLAR_WEIGHT_SUM_TOL 1E-5

#define	MAX_OPTICAL_LENGTH FP_PRECISION(100.)

#define	TAU_NUDGE 1E-12

#define	EXP_PRECISION FP_PRECISION(1E-5)

#define	MIN_EXP_INTERP_POINTS 100

#define	MIN_DET 1E-10

#define	MIN_LINALG_POWER_ITERATIONS 25

#define	MAX_LINALG_POWER_ITERATIONS 25000

#define	MIN_LINALG_TOLERANCE LINALG_TOL

#define	MIN_LINEAR_SOLVE_ITERATIONS 25

#define	MAX_LINEAR_SOLVE_ITERATIONS 10000

#define	LOCAL_COORDS_LEN 16

#define	MAX_VERSION_NUM 20

#define	NUM_FACES 6

#define	NUM_EDGES 12

#define	NUM_VERTICES 8

#define	NUM_SURFACES 26

#define	SURFACE_X_MIN 0

#define	SURFACE_Y_MIN 1

#define	SURFACE_Z_MIN 2

#define	SURFACE_X_MAX 3

#define	SURFACE_Y_MAX 4

#define	SURFACE_Z_MAX 5

#define	SURFACE_X_MIN_Y_MIN 6

#define	SURFACE_X_MAX_Y_MIN 7

#define	SURFACE_X_MIN_Y_MAX 8

#define	SURFACE_X_MAX_Y_MAX 9

#define	SURFACE_X_MIN_Z_MIN 10

#define	SURFACE_X_MAX_Z_MIN 11

#define	SURFACE_X_MIN_Z_MAX 12

#define	SURFACE_X_MAX_Z_MAX 13

#define	SURFACE_Y_MIN_Z_MIN 14

#define	SURFACE_Y_MAX_Z_MIN 15

#define	SURFACE_Y_MIN_Z_MAX 16

#define	SURFACE_Y_MAX_Z_MAX 17

#define	SURFACE_X_MIN_Y_MIN_Z_MIN 18

#define	SURFACE_X_MIN_Y_MIN_Z_MAX 19

#define	SURFACE_X_MIN_Y_MAX_Z_MIN 20

#define	SURFACE_X_MIN_Y_MAX_Z_MAX 21

#define	SURFACE_X_MAX_Y_MIN_Z_MIN 22

#define	SURFACE_X_MAX_Y_MIN_Z_MAX 23

#define	SURFACE_X_MAX_Y_MAX_Z_MIN 24

#define	SURFACE_X_MAX_Y_MAX_Z_MAX 25

#define	NUM_VALUES_PER_RETRIEVED_TRACK 6

#define	NUM_VALUES_PER_RETRIEVED_SEGMENT 7

#define	LCM_TOLERANCE 1.e-8

Detailed Description

Math constants and comparision tolerances.

Date: April 9, 2015.

Author: William Boyd, MIT, Course 22 (wboyd.nosp@m.@mit.nosp@m..edu)

Macro Definition Documentation

◆ DEFAULT_INIT_ID

#define DEFAULT_INIT_ID 1000000

The minimum auto ID used for Surfaces, Cells, Materials and Universes

◆ EXP_PRECISION

#define EXP_PRECISION FP_PRECISION(1E-5)

The minimum acceptable precision for exponential evaluations from the ExpEvaluator's linear interpolation table. This default precision was selected based on analysis by Yamamoto's 2004 paper on the topic.

◆ FLT_EPSILON

#define FLT_EPSILON 1.0E-12

Threshold to determine if a float equals to 0.0

◆ FLT_INFINITY

#define FLT_INFINITY 1.0E300

Threshold to determine if a float is equal to infinity

◆ FOUR_PI

#define FOUR_PI 12.566370614359172

The value of 4pi: $4\pi$

◆ LCM_TOLERANCE

#define LCM_TOLERANCE 1.e-8

Least common multiple tolerance

◆ MAX_OPTICAL_LENGTH

#define MAX_OPTICAL_LENGTH FP_PRECISION(100.)

The default maximum optical path length

◆ MIN_DET

#define MIN_DET 1E-10

The minimum calculated determinant to allow for the calculation of a matrix inverse.

◆ MIN_EXP_INTERP_POINTS

#define MIN_EXP_INTERP_POINTS 100

The minimum number of interpolation points to be used in an exponential lookup table

◆ MIN_LINALG_POWER_ITERATIONS

#define MIN_LINALG_POWER_ITERATIONS 25

The maximum number of iterations allowed for a power method eigenvalue solve in linalg.cpp

◆ MIN_LINEAR_SOLVE_ITERATIONS

#define MIN_LINEAR_SOLVE_ITERATIONS 25

The maximum number of iterations allowed for a linear solve in linalg.cpp

◆ NUM_FACES

#define NUM_FACES 6

The faces, edges, and vertices that collectively make up the surfaces of a rectangular prism. The edges denoted as "e" and vertices as "v" on the illustration below:

                             e
                 v +--------------------+ v
                  /|                   /|
                 / |                  / |
                /  |                 /  |
              e/  e|                /e  |e
              /    |               /    |
             /     |         e    /     |
            /    v +-------------/------+ v
         v +--------------------+ v    /
           |     /              |     /
           |    /               |    /
          e|  e/                |e e/
           |  /                 |  /
           | /                  | /
           |/                   |/
         v +--------------------+ v
                     e

◆ NUM_VALUES_PER_RETRIEVED_SEGMENT

#define NUM_VALUES_PER_RETRIEVED_SEGMENT 7

The number of values used in representing a Segment when the Segments are retrieved from the TrackGenerator.

◆ NUM_VALUES_PER_RETRIEVED_TRACK

#define NUM_VALUES_PER_RETRIEVED_TRACK 6

The number of values used in representing a Track when the Tracks are retrieved from the TrackGenerator.

◆ ON_LATTICE_CELL_THRESH

#define ON_LATTICE_CELL_THRESH 1E-12

Threshold to determine if a Point is on the boundary of a Lattice cell

◆ ON_SURFACE_THRESH

#define ON_SURFACE_THRESH 1E-12

Error threshold to determine if a point is to be considered on a Surface

◆ ONE_OVER_FOUR_PI

#define ONE_OVER_FOUR_PI 0.07957747154594767

The values of 1 divided by 4pi: $\frac{1}{4\pi}$

◆ POLAR_WEIGHT_SUM_TOL

#define POLAR_WEIGHT_SUM_TOL 1E-5

Tolerance for difference of the sum of polar weights with respect to 1.0

◆ SIGMA_T_THRESH

#define SIGMA_T_THRESH 1E-10

Threshold to determine how close the sum of $\Sigma_a$ and $\Sigma_s$ must match $\Sigma_t$ for each energy group

◆ TAU_NUDGE

#define TAU_NUDGE 1E-12

A small amount to increment the tau, the max optical path length, to ensure that tracks with the max optical path length are not split.

◆ TINY_MOVE

#define TINY_MOVE 1E-8

Distance a Point is moved to cross over a Surface into a new Cell

◆ ZERO_SIGMA_T

#define ZERO_SIGMA_T 1E-6

A negligible cross-section value to over-ride user-defined cross-sections very near zero (e.g., within (-1E-10, 1E-10))

Macros