src/matrix2_ptr.c file

Functions

void mat2_identity_ptr(matrix2* res)

Initializes the 2x2 matrix to identity (diagonal 1.0, others 0.0).

void mat2_mul_ptr(matrix2* res, const matrix2* a, const matrix2* b)

Multiplies two 2x2 matrices (a * b) in column-major / column-vector convention.

void mat2_transpose_ptr(matrix2* res, const matrix2* m)

Computes the transpose of the input 2x2 matrix and stores in res.

void mat2_inverse_ptr(matrix2* res, const matrix2* m)

Computes the inverse of the input 2x2 matrix using determinant and stores in res.

void mat2_mul_vec2_ptr(vector2* res, const matrix2* m, const vector2* v)

Multiplies a 2x2 matrix by a vector2.

void mat2_rotation_z_ptr(matrix2* res, const vm_float_t radians)

Sets the 2x2 matrix to a Z-axis (counter-clockwise) rotation.

void mat2_rotation_z_deg_ptr(matrix2* res, const vm_float_t degrees)

Initializes the 2x2 matrix to a rotation around Z axis (counter-clockwise).

void mat2_scale_ptr(matrix2* res, const vector2* s)

Builds a 2x2 scaling matrix from a vector2.

void mat2_from_mat3_ptr(matrix2* res, const matrix3* m)

Copies the upper-left 2x2 of a matrix3.

Function documentation