matrix3i_ptr.c File Reference

#include <vecmat.h>

Go to the source code of this file.

Functions
void	mat3i_identity_ptr (matrix3i *res)
	Fills the given 3x3 integer matrix with the identity matrix.
void	mat3i_mul_ptr (matrix3i *res, const matrix3i *a, const matrix3i *b)
	Multiplies two 3x3 integer matrices (standard matrix multiplication).
void	mat3i_transpose_ptr (matrix3i *res, const matrix3i *m)
	Computes the transpose of a 3x3 integer matrix.
void	mat3i_inverse_ptr (matrix3i *res, const matrix3i *m)
	Computes the inverse of a 3x3 integer matrix using adjugate over determinant.
void	mat3i_mul_vec3i_ptr (vector3i *res, const matrix3i *m, const vector3i *v)
	Multiplies a 3x3 integer matrix by a vector3i.
void	mat3i_mul_vec2i_ptr (vector2i *res, const matrix3i *m, const vector2i *v)
	Applies a 3x3 integer affine transform to a vector2i.

Function Documentation

mat3i_identity_ptr()

void mat3i_identity_ptr

(

matrix3i *

res

)

Fills the given 3x3 integer matrix with the identity matrix.

Parameters

res	Pointer to the result matrix.

Definition at line 12 of file matrix3i_ptr.c.

References matrix3i::m11, matrix3i::m12, matrix3i::m13, matrix3i::m21, matrix3i::m22, matrix3i::m23, matrix3i::m31, matrix3i::m32, and matrix3i::m33.

Referenced by mat3i_identity(), and mat3i_inverse_ptr().

mat3i_inverse_ptr()

void mat3i_inverse_ptr	(	matrix3i *	res,
		const matrix3i *	m )

Computes the inverse of a 3x3 integer matrix using adjugate over determinant.

If the determinant is zero (singular), sets the result to the identity matrix.

Parameters

res	Pointer to the result matrix.
m	Pointer to the input matrix.

Definition at line 67 of file matrix3i_ptr.c.

References matrix3i::m11, matrix3i::m12, matrix3i::m13, matrix3i::m21, matrix3i::m22, matrix3i::m23, matrix3i::m31, matrix3i::m32, matrix3i::m33, mat3i_determinant(), and mat3i_identity_ptr().

Referenced by mat3i_inverse().

mat3i_mul_ptr()

void mat3i_mul_ptr	(	matrix3i *	res,
		const matrix3i *	a,
		const matrix3i *	b )

Multiplies two 3x3 integer matrices (standard matrix multiplication).

Parameters

res	Pointer to the result matrix.
a	Pointer to the first input matrix.
b	Pointer to the second input matrix.

Definition at line 26 of file matrix3i_ptr.c.

References matrix3i::m11, matrix3i::m12, matrix3i::m13, matrix3i::m21, matrix3i::m22, matrix3i::m23, matrix3i::m31, matrix3i::m32, and matrix3i::m33.

Referenced by mat3i_mul().

mat3i_mul_vec2i_ptr()

void mat3i_mul_vec2i_ptr	(	vector2i *	res,
		const matrix3i *	m,
		const vector2i *	v )

Applies a 3x3 integer affine transform to a vector2i.

Parameters

res	Output value.
m	Input matrix.
v	Input vector.

Definition at line 115 of file matrix3i_ptr.c.

References matrix3i::m11, matrix3i::m12, matrix3i::m13, matrix3i::m21, matrix3i::m22, matrix3i::m23, vector2i::x, and vector2i::y.

Referenced by mat3i_mul_vec2i().

mat3i_mul_vec3i_ptr()

void mat3i_mul_vec3i_ptr	(	vector3i *	res,
		const matrix3i *	m,
		const vector3i *	v )

Multiplies a 3x3 integer matrix by a vector3i.

Parameters

res	Output value.
m	Input matrix.
v	Input vector.

Definition at line 98 of file matrix3i_ptr.c.

References matrix3i::m11, matrix3i::m12, matrix3i::m13, matrix3i::m21, matrix3i::m22, matrix3i::m23, matrix3i::m31, matrix3i::m32, matrix3i::m33, vector3i::x, vector3i::y, and vector3i::z.

Referenced by mat3i_mul_vec3i().

mat3i_transpose_ptr()

void mat3i_transpose_ptr	(	matrix3i *	res,
		const matrix3i *	m )

Computes the transpose of a 3x3 integer matrix.

Parameters

res	Pointer to the result matrix.
m	Pointer to the input matrix.

Definition at line 50 of file matrix3i_ptr.c.

References matrix3i::m11, matrix3i::m12, matrix3i::m13, matrix3i::m21, matrix3i::m22, matrix3i::m23, matrix3i::m31, matrix3i::m32, and matrix3i::m33.

Referenced by mat3i_transpose().