nearly_zero.h File Reference

PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University. More...

#include "dtoolbase.h"

Go to the source code of this file.

Macros
#define	IS_NEARLY_EQUAL(value1, value2)
#define	IS_NEARLY_ZERO(value)
#define	IS_THRESHOLD_COMPEQ(value1, value2, threshold)
#define	IS_THRESHOLD_EQUAL(value1, value2, threshold)
#define	IS_THRESHOLD_ZERO(value, threshold)
#define	MAYBE_ZERO(value)
#define	NEARLY_ZERO(FLOATTYPE)

Functions
constexpr double	get_nearly_zero_value (double)
constexpr float	get_nearly_zero_value (float)
constexpr int	get_nearly_zero_value (int)

Detailed Description

PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.

All rights reserved.

All use of this software is subject to the terms of the revised BSD license. You should have received a copy of this license along with this source code in a file named "LICENSE."

Author

drose

Date

2000-03-08

Definition in file nearly_zero.h.

Macro Definition Documentation

IS_NEARLY_EQUAL

#define IS_NEARLY_EQUAL	(		value1,
			value2 )

Value:

   (IS_THRESHOLD_EQUAL(value1, value2, get_nearly_zero_value(value1)))

Definition at line 73 of file nearly_zero.h.

IS_NEARLY_ZERO

#define IS_NEARLY_ZERO

(

value

)

Value:

  (IS_THRESHOLD_ZERO(value, get_nearly_zero_value(value)))

Definition at line 68 of file nearly_zero.h.

IS_THRESHOLD_COMPEQ

#define IS_THRESHOLD_COMPEQ	(		value1,
			value2,
			threshold )

Value:

  (cfloor(value1 / threshold + 0.5f) == cfloor(value2 / threshold + 0.5f))

Definition at line 59 of file nearly_zero.h.

IS_THRESHOLD_EQUAL

#define IS_THRESHOLD_EQUAL	(		value1,
			value2,
			threshold )

Value:

  (IS_THRESHOLD_ZERO((value1) - (value2), threshold))

Definition at line 52 of file nearly_zero.h.

IS_THRESHOLD_ZERO

#define IS_THRESHOLD_ZERO	(		value,
			threshold )

Value:

  ((value) < (threshold) && (value) > -(threshold))

Definition at line 47 of file nearly_zero.h.

MAYBE_ZERO

#define MAYBE_ZERO

(

value

)

Value:

  (IS_NEARLY_ZERO(value) ? 0 : (value))

Definition at line 79 of file nearly_zero.h.

NEARLY_ZERO

#define NEARLY_ZERO

(

FLOATTYPE

)

Value:

(get_nearly_zero_value((FLOATTYPE)0))

Definition at line 65 of file nearly_zero.h.

Function Documentation

get_nearly_zero_value() [1/3]

double get_nearly_zero_value ( double )

constexpr

Definition at line 28 of file nearly_zero.h.

get_nearly_zero_value() [2/3]

float get_nearly_zero_value ( float )

constexpr

Definition at line 33 of file nearly_zero.h.

get_nearly_zero_value() [3/3]

int get_nearly_zero_value ( int )

constexpr

Definition at line 38 of file nearly_zero.h.