matrix.h File Reference

Support for matrix and vector operations. More...

#include "gctypes.h"

Go to the source code of this file.

Data Structures
struct	Vector
	A vector of 32-bit floating-point values. More...
struct	Matrix
	A matrix of 32-bit floating-point values. More...

Macros
#define	ROW_VECTOR(mat, ndx)   ((Vector) {mat.data[ndx], mat.nCol})

Functions
bool	initVector (Vector *vec, size_t size)
	Initialize a Vector. More...
bool	initMatrix (Matrix *mat, size_t numRows, size_t numCols)
	Initialize a matrix. More...
void	populateVec (Vector *vec, void *func)
	Populate the values in a vector. More...
void	populateMat (Matrix *mat, void *func)
	Populate the values in a matrix. More...
void	matrixVectorProduct (Vector *y, const Matrix *A, const Vector *x)
	Multiplication of the form y = Ax More...
float	vectorDotProd (const Vector *u, const Vector *v)
	Calculates the dot product of two vectors. More...

Variables
bool	_matrixError
	Set to true when a error occurs in a matrix operation.

Detailed Description

Support for matrix and vector operations.

---

Data Structure Documentation

struct Vector

A vector of 32-bit floating-point values.

Data Fields
float *	data	array of floating-point values
size_t	size	size of data

struct Matrix

A matrix of 32-bit floating-point values.

Data Fields
float **	data	two-dimensional array of floating-point values
size_t	nRow	number of rows in the matrix
size_t	nCol	number of columns in the matrix

Macro Definition Documentation

#define ROW_VECTOR	(		mat,
			ndx
	)		((Vector) {mat.data[ndx], mat.nCol})

Extract a row from mat as a Vector struct

Function Documentation

void populateVec	(	Vector *	vec,
		void *	func
	)

Populate the values in a vector.

This function populates each element in the vector based on func. Element n will be equal to func(n) .

Parameters

vec	- pointer to a Vector struct
func	- pointer to a function of the form float foo(u32)

Returns

None.

void populateMat	(	Matrix *	mat,
		void *	func
	)

Populate the values in a matrix.

This function populates each element in the matrix based on func. The element at [row][col] will be equal to func(row, col) .

Parameters

mat	- pointer to a Matrix struct
func	- pointer to a function of the form float foo(u32, u32)

Returns

None.

void matrixVectorProduct	(	Vector *	y,
		const Matrix *	A,
		const Vector *	x
	)

Multiplication of the form y = Ax

This function multiplies Ax and stores the result in y.

Parameters

y	- pointer to Vector struct
A	- pointer to Matrix struct
x	- pointer to Vector struct

Returns

none

Note

This function uses specific optimizations for the Wii hardware

See also

http://wiibrew.org/wiki/Paired_single

float vectorDotProd	(	const Vector *	u,
		const Vector *	v
	)

Calculates the dot product of two vectors.

Parameters

u	- pointer to a Vector struct
v	- pointer to a Vector struct

Returns

The standard dot product of u and v.

Note

This function uses specific optimizations for the Wii hardware

See also

http://wiibrew.org/wiki/Paired_single