general.h File Reference

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Functions
int	general_bytes2int (unsigned char byte_high, unsigned char byte_low)
unsigned int	general_bytes2uint (unsigned char byte_high, unsigned char byte_low)
void	general_int2bytes (int integer, unsigned char *byte_high, unsigned char *byte_low)
double	general_gaussrand (double mu, double sigma)
float	general_gaussian (float mu, float sigma, int x)
float	general_dist_squared (int x1, int y1, int x2, int y2)
float	general_dist2seg (int x, int y, int p1[], int p2[])
void	general_circle (int **arr, int cx, int cy, int radius)
void	general_circle_eight_points (int **arr, int cx, int cy, int x, int y)
void	general_circle_four_points (int **arr, int cx, int cy, int x, int y)
void	general_circle_horizontal_line (int **arr, int x, int y, int len)

Detailed Description

Author

Eriks Zaharans

Date

1 Jul 2013

DESCRIPTION

General function library header file.

Definition in file general.h.

Function Documentation

int general_bytes2int	(	unsigned char	byte_high,
		unsigned char	byte_low
	)

Convert two bytes to int (two's complement)

Parameters

byte_high	High byte of data
byte_low	Low byte of data

Returns

Integer (two's complement)

Definition at line 29 of file general.c.

unsigned int general_bytes2uint	(	unsigned char	byte_high,
		unsigned char	byte_low
	)

Convert two bytes to unsigned int

Parameters

byte_high	High byte of data
byte_low	Low byte of data

Returns

Unsigned integer

Definition at line 52 of file general.c.

void general_circle	(	int **	arr,
		int	cx,
		int	cy,
		int	radius
	)

Draw (fill) filled circle in 2D array http://en.wikipedia.org/wiki/Midpoint_circle_algorithm // Code modified

Parameters

cx	Center x coordinate
cy	Center y coordinate
radius	Radius of circle

Returns

Void

Definition at line 180 of file general.c.

void general_circle_eight_points	(	int **	arr,
		int	cx,
		int	cy,
		int	x,
		int	y
	)

Draw (fill) eight points - Part of general_circle() function http://en.wikipedia.org/wiki/Midpoint_circle_algorithm // Code modified

Parameters

cx	Center x coordinate
cy	Center y coordinate
x	X coordinate
y	Y coordinate

Returns

Void

Definition at line 212 of file general.c.

void general_circle_four_points	(	int **	arr,
		int	cx,
		int	cy,
		int	x,
		int	y
	)

Draw (fill) four points - Part of general_circle() function http://en.wikipedia.org/wiki/Midpoint_circle_algorithm // Code modified

Parameters

cx	Center x coordinate
cy	Center y coordinate
x	X coordinate
y	Y coordinate

Returns

Void

Definition at line 230 of file general.c.

void general_circle_horizontal_line	(	int **	arr,
		int	x,
		int	y,
		int	len
	)

Draw (fill) horizontal line - Part of general_circle() function http://en.wikipedia.org/wiki/Midpoint_circle_algorithm // Code modified

Parameters

x	Start x coordinate
y	Start y coordinate
len	Length of line

Returns

Void

Definition at line 244 of file general.c.

float general_dist2seg	(	int	x,
		int	y,
		int	p1[],
		int	p2[]
	)

Calculate distance from point to line segment

Parameters

x	X coordinate of point
y	Y coordinate of point
p1	Array of x and y coordinates for 1st line point
p2	Array of x and y coordinates for 2nd line point

Returns

Distance from point to line segment

Definition at line 154 of file general.c.

float general_dist_squared	(	int	x1,
		int	y1,
		int	x2,
		int	y2
	)

Calculate squared distance between two points

Parameters

x1	X coordinate of 1st point
y1	Y coordinate of 1st point
x2	X coordinate of 2nd point
y2	Y coordinate of 1st point

Returns

Squared distance between points

Definition at line 141 of file general.c.

float general_gaussian	(	float	mu,
		float	sigma,
		int	x
	)

Calculate Gaussian

Parameters

mu	Mean of gaussian
sigma	Variance of gaussian
x	Position on x axis

Returns

Gaussian value at x

Definition at line 128 of file general.c.

double general_gaussrand	(	double	mu,
		double	sigma
	)

Random number based on normal (gaussian) distribution http://c-faq.com/lib/gaussian.html [Donald E. Knuth]

Parameters

mu	Mean of gaussian
sigma	Variance of gaussian

Returns

Random number based on normal distribution

Definition at line 91 of file general.c.

void general_int2bytes	(	int	integer,
		unsigned char *	byte_high,
		unsigned char *	byte_low
	)

Convert int to two bytes (two's complement)

Parameters

integer	Integer to be converted
byte_high	Pointer to high byte of data
byte_low	Pointer to low byte of data

Returns

Integer (two's complement)

Definition at line 69 of file general.c.