OBSqrtTbl Class Reference
Square Root lookup table - given a distance squared returns distance. More...
#include <openbabel/obutil.h>
Public Member Functions | |
| OBSqrtTbl () | |
| OBSqrtTbl (const double max, const double incr) | |
| ~OBSqrtTbl () | |
| double | Sqrt (double d2) const |
| void | Init (double max, double incr) |
Detailed Description
Square Root lookup table - given a distance squared returns distance.
Constructor & Destructor Documentation
| OBSqrtTbl | ( | ) | [inline] |
| OBSqrtTbl | ( | const double | max, | |
| const double | incr | |||
| ) | [inline] |
Create a square root table to handle up to the square root of max (e.g., if you want the square root of 144, supply 12 for max).
- Parameters:
-
max The maximum square root stored in the lookup table incr The floating point resolution of the lookup table
| ~OBSqrtTbl | ( | ) | [inline] |
Member Function Documentation
| double Sqrt | ( | double | d2 | ) | const [inline] |
Fast square root calculation using a lookup table.
- Returns:
- Square root of
d2
| void Init | ( | double | max, | |
| double | incr | |||
| ) | [inline] |
Initialize the square root lookup table.
- Parameters:
-
max The maximum square root stored in the lookup table (e.g., if you want the square root of 144, supply 12 for max) incr The floating point resolution of the lookup table
The documentation for this class was generated from the following file:
