gmisc.h File Reference

Detailed Description

GMISC - Miscellaneous Routines header file.

Definition in file gmisc.h.

#include "../../gfx.h"
#include <math.h>

Go to the source code of this file.

Data Structures
struct	MatrixFloat2D
	A matrix for doing 2D graphics using floats. More...
struct	MatrixFixed2D
	A matrix for doing 2D graphics using fixed point maths. More...

Functions
void	gmiscArrayConvert (ArrayDataFormat srcfmt, void *src, ArrayDataFormat dstfmt, void *dst, gMemSize cnt)
	Convert from one array format to another array format. More...
float	invsqrt (float n)
	Fast inverse square root function (x^-1/2) More...
void	gmiscMatrixFloat2DApplyToPoints (gPoint *dst, const gPoint *src, const MatrixFloat2D *m, int cnt)
	Apply the matrix to a set of points. More...
void	gmiscMatrixFloat2DSetIdentity (MatrixFloat2D *m)
	Set the 2D matrix to the identity matrix. More...
void	gmiscMatrixFloat2DMultiply (MatrixFloat2D *dst, const MatrixFloat2D *src1, const MatrixFloat2D *src2)
	Multiple two 2D matrixes together. More...
void	gmiscMatrixFloat2DApplyTranslation (MatrixFloat2D *dst, const MatrixFloat2D *src, float tx, float ty)
	Add an x,y translation to a matrix. More...
void	gmiscMatrixFloat2DApplyScale (MatrixFloat2D *dst, const MatrixFloat2D *src, float sx, float sy)
	Add x,y scaling to a matrix. More...
void	gmiscMatrixFloat2DApplyShear (MatrixFloat2D *dst, const MatrixFloat2D *src, float sx, float sy)
	Add x,y shear to a matrix. More...
void	gmiscMatrixFloat2DApplyRotation (MatrixFloat2D *dst, const MatrixFloat2D *src, int angle)
	Add rotation to a matrix. More...
void	gmiscMatrixFixed2DApplyToPoints (gPoint *dst, const gPoint *src, const MatrixFixed2D *m, int cnt)
	Apply the matrix to a set of points. More...
void	gmiscMatrixFixed2DSetIdentity (MatrixFixed2D *m)
	Set the 2D matrix to the identity matrix. More...
void	gmiscMatrixFixed2DMultiply (MatrixFixed2D *dst, const MatrixFixed2D *src1, const MatrixFixed2D *src2)
	Multiple two 2D matrixes together. More...
void	gmiscMatrixFixed2DApplyTranslation (MatrixFixed2D *dst, const MatrixFixed2D *src, fixed tx, fixed ty)
	Add an x,y translation to a matrix. More...
void	gmiscMatrixFixed2DApplyScale (MatrixFixed2D *dst, const MatrixFixed2D *src, fixed sx, fixed sy)
	Add x,y scaling to a matrix. More...
void	gmiscMatrixFixed2DApplyShear (MatrixFixed2D *dst, const MatrixFixed2D *src, fixed sx, fixed sy)
	Add x,y shear to a matrix. More...
void	gmiscMatrixFixed2DApplyRotation (MatrixFixed2D *dst, const MatrixFixed2D *src, int angle)
	Add rotation to a matrix. More...
gBool	gmiscHittestPoly (const gPoint *pntarray, unsigned cnt, const gPoint *p)
	Check whether a point is inside or on the edge of a polygon. More...
double	fsin (int degrees)
	Fast Table Based Trig functions. More...
fixed	ffsin (int degrees)
	Fast Table Based Trig functions. More...

Macros
#define	gfxSampleFormatIsSigned(fmt)   ((fmt) & 1)
	Is the sample data format a "signed" data format? More...
#define	gfxSampleFormatBits(fmt)   ((fmt) & ~1)
	How many bits are in the sample data format. More...
#define	FIXED_PI   FP2FIXED(GFX_PI)
	The famous number pi. More...
#define	FIXED(x)   ((fixed)(x)<<16) /* @< integer to fixed */
	Macros to convert to and from a fixed point. More...
#define	FSIN(degrees)   sintabledouble[degrees];
	Fast Table Based Trig functions. More...
#define	FFSIN(degrees)   sintablefixed[degrees];
	Fast Table Based Trig functions. More...

Typedefs
typedef enum ArrayDataFormat_e	ArrayDataFormat
	Sample data formats. More...
typedef gI32	fixed
	The type for a fixed point type. More...
typedef struct MatrixFloat2D	MatrixFloat2D
	A matrix for doing 2D graphics using floats. More...
typedef struct MatrixFixed2D	MatrixFixed2D
	A matrix for doing 2D graphics using fixed point maths. More...

Enumerations
enum	ArrayDataFormat_e
	Sample data formats. More...