OpenTTD Source 20241224-master-gf74b0cf984
math_func.cpp File Reference

Math functions. More...

#include "../stdafx.h"
#include "math_func.hpp"
#include "../safeguards.h"

Go to the source code of this file.

Functions

int DivideApprox (int a, int b)
 Deterministic approximate division.
 
uint32_t IntSqrt (uint32_t num)
 Compute the integer square root.
 

Detailed Description

Math functions.

Definition in file math_func.cpp.

Function Documentation

◆ DivideApprox()

int DivideApprox ( int  a,
int  b 
)

Deterministic approximate division.

Cancels out division errors stemming from the integer nature of the division over multiple runs.

Parameters
aDividend.
bDivisor.
Returns
a/b or (a/b)+1.

Definition at line 22 of file math_func.cpp.

References abs().

Referenced by StationViewWindow::BuildCargoList(), and StationViewWindow::EstimateDestinations().

◆ IntSqrt()

uint32_t IntSqrt ( uint32_t  num)

Compute the integer square root.

Parameters
numRadicand.
Returns
Rounded integer square root.
Note
Algorithm taken from http://en.wikipedia.org/wiki/Methods_of_computing_square_roots

Definition at line 42 of file math_func.cpp.

Referenced by CanalMaintenanceCost(), RailMaintenanceCost(), RoadMaintenanceCost(), SignalMaintenanceCost(), and StationMaintenanceCost().