nmath.c File Reference

Some math routines for naev. More...

#include "nmath.h"
#include "array.h"
#include "log.h"
#include "rng.h"

Go to the source code of this file.

Functions
int	nmath_solve2Eq (double results[2], double a, double b, double c)
	Solves the equation: a * x^2 + b * x + c = 0. More...
double	max3 (double v1, double v2, double v3)
	Returns the maximum of 3 values. More...
double	min3 (double v1, double v2, double v3)
	Returns the minimum of 3 values. More...
void	arrayShuffle (void **array)
	Randomly sorts an array (array.h) of pointers in place with the Fisher-Yates shuffle. More...
int	rectOverlap (double x, double y, double w, double h, double x2, double y2, double w2, double h2)
	Checks whether two rectangles overlap at any point. More...
double	ease_SineInOut (double x)
	Simple symmetric sine-based easing. More...
double	ease_QuadraticInOut (double x)
	Simple symmetric quadratic easing. More...
double	ease_CubicInOut (double x)
	Simple symmetric cubic easing. More...

Detailed Description

Some math routines for naev.

Definition in file nmath.c.

Function Documentation

arrayShuffle()

void arrayShuffle

(

void **

array

)

Randomly sorts an array (array.h) of pointers in place with the Fisher-Yates shuffle.

Definition at line 70 of file nmath.c.

ease_CubicInOut()

double ease_CubicInOut

(

double

x

)

Simple symmetric cubic easing.

Definition at line 124 of file nmath.c.

ease_QuadraticInOut()

double ease_QuadraticInOut

(

double

x

)

Simple symmetric quadratic easing.

Definition at line 114 of file nmath.c.

ease_SineInOut()

double ease_SineInOut

(

double

x

)

Simple symmetric sine-based easing.

Definition at line 106 of file nmath.c.

max3()

double max3	(	double	v1,
		double	v2,
		double	v3
	)

Returns the maximum of 3 values.

Definition at line 48 of file nmath.c.

min3()

double min3	(	double	v1,
		double	v2,
		double	v3
	)

Returns the minimum of 3 values.

Definition at line 58 of file nmath.c.

nmath_solve2Eq()

int nmath_solve2Eq	(	double	results[2],
		double	a,
		double	b,
		double	c
	)

Solves the equation: a * x^2 + b * x + c = 0.

Parameters

results	Stores both results.
a	Quadratic parameter.
b	Linear parameter.
c	Offset coefficient.

Returns

0 on success, -1 on error.

Definition at line 30 of file nmath.c.

rectOverlap()

int rectOverlap	(	double	x,
		double	y,
		double	w,
		double	h,
		double	x2,
		double	y2,
		double	w2,
		double	h2
	)

Checks whether two rectangles overlap at any point.

Parameters

x	X coordinate of first rectangle
y	Y coordinate of first rectangle
w	Width of first rectangle
h	Height of first rectangle
x2	X coordinate of second rectangle
y2	Y coordinate of second rectangle
w2	Width of second rectangle
h2	Height of second rectangle

Returns

1 if the rectangles overlap, 0 otherwise.

Definition at line 93 of file nmath.c.