util.cpp File Reference

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <time.h>
#include "gfx.h"
#include "scrollarea.h"

Functions
void	msleep (float ms)
	sleep for a period of time given in milli seconds More...
float	rnd ()
	generate a random float number in the range [0,1[ More...
bool	is_repeating (float time, float period, float percent)
	check for a repeating time period More...
int	strpre (const char *pre, const char *str)
	check if a string starts with a prefix More...
const char *	get_arg (int n, int argc, char *argv[])
	retrieve the n-th argument from the command line arguments More...
const char *	get_opt (int n, int argc, char *argv[], double *value, double default_value)
	retrieve the n-th option from the command line arguments More...
void	log_text (const char *format,...)
	print log text in overlay More...
void	log_float (float v)
	print float value to log overlay More...
void	log_vec2 (const Vec2 &v)
	print 2D vector to log overlay More...
void	log_vec3 (const Vec3 &v)
	print 3D vector to log overlay More...
void	log_mat3 (const Mat3 &m)
	print 3x3 matrix to log overlay More...
void	log_clear ()
	clear log overlay More...

Variables
static int	log_line = 0

Function Documentation

get_arg()

const char* get_arg	(	int	n,
		int	argc,
		char *	argv[]
	)

retrieve the n-th argument from the command line arguments

• options starting with - or – are omitted

get_opt()

const char* get_opt	(	int	n,
		int	argc,
		char *	argv[],
		double *	value = NULL,
		double	default_value = 0
	)

retrieve the n-th option from the command line arguments

• arguments not starting with - or – are omitted
• if the option contains a = followed by a decimal value,
• then the value is returned by reference,
• else a default value is returned

is_repeating()

bool is_repeating	(	float	time,
		float	period,
		float	percent = 50
	)

check for a repeating time period

• "time" is the actual time
• "period" is the repeating time period
• return value is true for the first "percent" of each period
• by default the return value is true for the first half of the period

log_clear()

void log_clear

(

)

clear log overlay

log_float()

void log_float

(

float

v

)

print float value to log overlay

log_mat3()

void log_mat3

(

const Mat3 &

m

)

print 3x3 matrix to log overlay

log_text()

void log_text	(	const char *	format,
			...
	)

print log text in overlay

• log text is given in printf format style

log_vec2()

void log_vec2

(

const Vec2 &

v

)

print 2D vector to log overlay

log_vec3()

void log_vec3

(

const Vec3 &

v

)

print 3D vector to log overlay

msleep()

void msleep

(

float

ms

)

sleep for a period of time given in milli seconds

rnd()

float rnd

(

)

generate a random float number in the range [0,1[

strpre()

int strpre	(	const char *	pre,
		const char *	str
	)

check if a string starts with a prefix

• return value is eqivalent to strncmp

Variable Documentation

log_line

int log_line = 0

static