src/matrix3_ptr.c file

Functions

void mat3_identity_ptr(matrix3* res)

Initializes the 3x3 matrix to identity (diagonal 1.0, others 0.0).

void mat3_mul_ptr(matrix3* res, const matrix3* a, const matrix3* b)

Multiplies two 3x3 matrices (a * b) in column-major / column-vector convention.

void mat3_transpose_ptr(matrix3* res, const matrix3* m)

Computes the transpose of the input 3x3 matrix and stores in res.

void mat3_inverse_ptr(matrix3* res, const matrix3* m)

Computes the inverse of the input 3x3 matrix using the adjugate method and stores in res.

void mat3_rotation_z_ptr(matrix3* res, vm_float_t radians)

Sets the 3x3 matrix to a Z-axis rotation by the given angle in radians.

void mat3_rotation_z_deg_ptr(matrix3* res, vm_float_t degrees)

Initializes the 3x3 matrix to a rotation around the Z axis.

void mat3_rotation_x_ptr(matrix3* res, vm_float_t radians)

Sets the 3x3 matrix to a rotation around the X axis.

void mat3_rotation_x_deg_ptr(matrix3* res, vm_float_t degrees)

Initializes the 3x3 matrix to a rotation around the X axis.

void mat3_rotation_y_ptr(matrix3* res, vm_float_t radians)

Sets the 3x3 matrix to a rotation around the Y axis.

void mat3_rotation_y_deg_ptr(matrix3* res, vm_float_t degrees)

Initializes the 3x3 matrix to a rotation around the Y axis.

void mat3_translate_ptr(matrix3* res, const vector2* t)

Builds a 3x3 2D translation matrix.

void mat3_scale_ptr(matrix3* res, const vector2* s)

Builds a 3x3 2D scaling matrix.

void mat3_from_mat4_ptr(matrix3* res, const matrix4* m)

Copies the upper-left 3x3 of a matrix4.

void mat3_normal_ptr(matrix3* res, const matrix3* m)

Inverse-transpose of a 3x3, for transforming normals.

void mat3_mul_vec3_ptr(vector3* res, const matrix3* m, const vector3* v)

Multiplies a 3x3 matrix by a vector3.

void mat3_mul_vec2_ptr(vector2* res, const matrix3* m, const vector2* v)

Applies a 3x3 affine transform to a vector2.

Function documentation