matrix.h File Reference

Simple transformation matrix (translate only) More...

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Classes
struct	matrix
	matrix More...

Functions
void	matrix_cleanup ()
	release resources held by the global matrix object More...
void	matrix_push ()
	pushes the current transformation matrix onto the stack More...
void	matrix_pop ()
	restore the current transformation matrix More...
void	matrix_translate (int const i_translate_x, int const i_translate_y)
	translate the current transformation matrix More...
void	matrix_transform (int *const o_pos_x, int *const o_pos_y)
	apply the transformation matrix to the parameters More...

Variables
struct matrix	_matrix
	current transformation matrix

Detailed Description

Simple transformation matrix (translate only)

Function Documentation

matrix_cleanup()

void matrix_cleanup

(

)

release resources held by the global matrix object

This routine should be called when the application exits to release resources created by the matrix routines.

matrix_pop()

void matrix_pop

(

)

restore the current transformation matrix

Returns

none

matrix_push()

void matrix_push

(

)

pushes the current transformation matrix onto the stack

Returns

none

matrix_transform()

void matrix_transform	(	int *const	o_pos_x,
		int *const	o_pos_y
	)

apply the transformation matrix to the parameters

Parameters

[in,out]	o_pos_x	x position to transform
[in,out]	o_pos_y	y position to transform

Returns

none

matrix_translate()

void matrix_translate	(	int const	i_translate_x,
		int const	i_translate_y
	)

translate the current transformation matrix

Parameters

[in]	i_translate_x	amount to translate in the X direction
[in]	i_translate_y	amount to translate in the Y direction

Returns

none

This operation is additive.