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macros.h File Reference

Go to the source code of this file.

Defines
#define	PI   3.14159265358979323846
	defines pi with 20 decimals
#define	verbose   1
	prints debugging info to stdout
#define	DEBUG   if (verbose) printf
#define	GLERROR
#define	AND   &&
#define	OR   ||
#define	NOT   !
#define	MAX(a, b)   ((a)>(b) ? (a) : (b))
	MAX returns the greatest of two scalars.
#define	MIN(a, b)   ((a)<(b) ? (a) : (b))
	MIN returns the smallest of two scalars.
#define	IMAX(a, b)   ((a)>(b) ? (0) : (1))
	as MAX returns the greatest of two scalars, IMAX tells which one is greater
#define	IMIN(a, b)   ((a)<(b) ? (0) : (1))
	as MIN returns the smallest of two scalars, IMIN tells which one is smaller
#define	ABS(a)   ((a)>=0 ? (a) : (-(a)))
	absolute value of scalar
#define	TEST_BIT(x, b)   (((x) & (1<<(b))) != 0 )
#define	SET_BIT(x, b)   ((x) |= (1 << (b)))
#define	CLEAR_BIT(x, b)   ((x) &= ~(1 << (b)))
#define	TOGGLE_BIT(x, b)   ((TEST_BIT(x,b))?(CLEAR_BIT(x,b)):(SET_BIT(x,b)))
#define	flushout   fflush(stdout)
	flushes the stdout output stream
#define	flusherr   fflush(stderr)
	flushes the stderr output stream
#define	randf()   ((float) rand() / (float)RAND_MAX )
#define	SIGN(x)   ((x)>=0 ? 1 : -1)
	gets the sign of a number
#define	DEG2RAD(x)   ((x)/180.0*pi)
	conversion from degrees to radians
#define	RAD2DEG(x)   ((x)/pi*180.0)
	conversion from radians to degrees
#define	CLAMP(x, lo, hi)   {if ((x) < (lo)) {(x)=(lo);} else if((x) > (hi)){(x)=(hi);}}
	clamps a value to some fixed interval

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Define Documentation

#define ABS (  a    )     ((a)>=0 ? (a) : (-(a)))

absolute value of scalar

#define AND   &&

#define CLAMP (  x, lo, hi    )     {if ((x) < (lo)) {(x)=(lo);} else if((x) > (hi)){(x)=(hi);}}

clamps a value to some fixed interval

#define CLEAR_BIT (  x, b    )     ((x) &= ~(1 << (b)))

#define DEBUG   if (verbose) printf

#define DEG2RAD (  x    )     ((x)/180.0*pi)

conversion from degrees to radians

#define flusherr   fflush(stderr)

flushes the stderr output stream

#define flushout   fflush(stdout)

flushes the stdout output stream

#define GLERROR

Value: { \ GLenum code = glGetError(); \ while (code!=GL_NO_ERROR) \ { \ printf("Gl error: %s\n",(char *) gluErrorString(code));\ code = glGetError(); \ } \ } Checks for openGL error, if there is one, prints it on stdout Note: this routine is used for debugging

#define IMAX (  a, b    )     ((a)>(b) ? (0) : (1))

as MAX returns the greatest of two scalars, IMAX tells which one is greater

#define IMIN (  a, b    )     ((a)<(b) ? (0) : (1))

as MIN returns the smallest of two scalars, IMIN tells which one is smaller

#define MAX (  a, b    )     ((a)>(b) ? (a) : (b))

MAX returns the greatest of two scalars.

#define MIN (  a, b    )     ((a)<(b) ? (a) : (b))

MIN returns the smallest of two scalars.

#define NOT   !

#define OR   ||

#define PI   3.14159265358979323846

defines pi with 20 decimals

#define RAD2DEG (  x    )     ((x)/pi*180.0)

conversion from radians to degrees

#define randf (    )     ((float) rand() / (float)RAND_MAX )

floating-point random Returns: a random float between 0 and 1

#define SET_BIT (  x, b    )     ((x) |= (1 << (b)))

#define SIGN (  x    )     ((x)>=0 ? 1 : -1)

gets the sign of a number

#define TEST_BIT (  x, b    )     (((x) & (1<<(b))) != 0 )

#define TOGGLE_BIT (  x, b    )     ((TEST_BIT(x,b))?(CLEAR_BIT(x,b)):(SET_BIT(x,b)))

#define verbose   1

prints debugging info to stdout

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