matrix3.c File Reference

#include <vecmat.h>

Go to the source code of this file.

Functions
matrix3	mat3_identity (void)
	Constructs the 3x3 identity matrix.
matrix3	mat3_mul (const matrix3 a, const matrix3 b)
	Multiplies two 3x3 matrices.
matrix3	mat3_transpose (const matrix3 m)
	Computes the transpose of a 3x3 matrix.
matrix3	mat3_inverse (const matrix3 m)
	Computes the inverse of a 3x3 matrix.
matrix3	mat3_rotation_z (const vm_float_t degrees)
	Constructs the 3x3 rotation matrix around the Z-axis.
vm_float_t	mat3_determinant (const matrix3 m)
	Computes the determinant of a 3x3 matrix.
vector3	mat3_mul_vec3 (const matrix3 m, const vector3 v)
	Multiplies a 3x3 matrix by a vector3.
vector2	mat3_mul_vec2 (const matrix3 m, const vector2 v)
	Applies a 3x3 affine transform to a vector2.
matrix3	mat3_rotation_x (const vm_float_t degrees)
	Builds a 3x3 rotation matrix around the X axis (degrees).
matrix3	mat3_rotation_y (const vm_float_t degrees)
	Builds a 3x3 rotation matrix around the Y axis (degrees).
matrix3	mat3_translate (const vector2 t)
	Builds a 3x3 2D translation matrix.
matrix3	mat3_scale (const vector2 s)
	Builds a 3x3 2D scaling matrix.
matrix3	mat3_from_mat4 (const matrix4 m)
	Copies the upper-left 3x3 of a matrix4.

Function Documentation

mat3_determinant()

vm_float_t mat3_determinant

(

const matrix3

m

)

Computes the determinant of a 3x3 matrix.

Parameters

m	The input matrix.

Returns

The determinant value.

Definition at line 88 of file matrix3.c.

References matrix3::v.

mat3_from_mat4()

matrix3 mat3_from_mat4

(

const matrix4

m

)

Copies the upper-left 3x3 of a matrix4.

See mat3_from_mat4_ptr instead.

Parameters

m	Input matrix.

Returns

The resulting matrix3.

Definition at line 195 of file matrix3.c.

References mat3_from_mat4_ptr().

mat3_identity()

matrix3 mat3_identity

(

void

)

Constructs the 3x3 identity matrix.

See mat3_identity_ptr instead.

Returns

The identity matrix3.

Definition at line 14 of file matrix3.c.

References mat3_identity_ptr().

mat3_inverse()

matrix3 mat3_inverse

(

const matrix3

m

)

Computes the inverse of a 3x3 matrix.

See mat3_inverse_ptr instead.

Parameters

m	The input matrix.

Returns

The inverse matrix.

Definition at line 60 of file matrix3.c.

References mat3_inverse_ptr().

mat3_mul()

matrix3 mat3_mul	(	const matrix3	a,
		const matrix3	b )

Multiplies two 3x3 matrices.

See mat3_mul_ptr instead.

Parameters

a	The first matrix.
b	The second matrix.

Returns

The product matrix.

Definition at line 30 of file matrix3.c.

References mat3_mul_ptr().

mat3_mul_vec2()

vector2 mat3_mul_vec2	(	const matrix3	m,
		const vector2	v )

Applies a 3x3 affine transform to a vector2.

See mat3_mul_vec2_ptr instead.

Parameters

m	Input matrix.
v	Input vector.

Returns

The resulting vector2.

Definition at line 120 of file matrix3.c.

References mat3_mul_vec2_ptr().

mat3_mul_vec3()

vector3 mat3_mul_vec3	(	const matrix3	m,
		const vector3	v )

Multiplies a 3x3 matrix by a vector3.

See mat3_mul_vec3_ptr instead.

Parameters

m	Input matrix.
v	Input vector.

Returns

The resulting vector3.

Definition at line 104 of file matrix3.c.

References mat3_mul_vec3_ptr().

mat3_rotation_x()

matrix3 mat3_rotation_x

(

const vm_float_t

degrees

)

Builds a 3x3 rotation matrix around the X axis (degrees).

See mat3_rotation_x_ptr instead.

Parameters

degrees

Rotation angle in degrees.

Returns

The resulting matrix3.

Definition at line 135 of file matrix3.c.

References mat3_rotation_x_ptr().

mat3_rotation_y()

matrix3 mat3_rotation_y

(

const vm_float_t

degrees

)

Builds a 3x3 rotation matrix around the Y axis (degrees).

See mat3_rotation_y_ptr instead.

Parameters

degrees

Rotation angle in degrees.

Returns

The resulting matrix3.

Definition at line 150 of file matrix3.c.

References mat3_rotation_y_ptr().

mat3_rotation_z()

matrix3 mat3_rotation_z

(

const vm_float_t

degrees

)

Constructs the 3x3 rotation matrix around the Z-axis.

See mat3_rotation_z_ptr instead.

Parameters

degrees

The rotation angle in degrees.

Returns

The rotation matrix3.

Definition at line 75 of file matrix3.c.

References mat3_rotation_z_ptr().

mat3_scale()

matrix3 mat3_scale

(

const vector2

s

)

Builds a 3x3 2D scaling matrix.

See mat3_scale_ptr instead.

Parameters

s	Scale vector.

Returns

The resulting matrix3.

Definition at line 180 of file matrix3.c.

References mat3_scale_ptr().

mat3_translate()

matrix3 mat3_translate

(

const vector2

t

)

Builds a 3x3 2D translation matrix.

See mat3_translate_ptr instead.

Parameters

t	Translation vector.

Returns

The resulting matrix3.

Definition at line 165 of file matrix3.c.

References mat3_translate_ptr().

mat3_transpose()

matrix3 mat3_transpose

(

const matrix3

m

)

Computes the transpose of a 3x3 matrix.

See mat3_transpose_ptr instead.

Parameters

m	The input matrix.

Returns

The transposed matrix.

Definition at line 45 of file matrix3.c.

References mat3_transpose_ptr().